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HTTP请求封装Java工具类

装载自：http://www.open-open.com/lib/view/open1384844838743.html
package com.wiker;  



</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.BufferedReader;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.ByteArrayOutputStream;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.IOException;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.InputStream;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.InputStreamReader;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.OutputStream;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.net.HttpURLConnection;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.net.InetAddress;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.net.Socket;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.net.URL;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.net.URLConnection;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.net.URLEncoder; </br> 
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.nio.charset.Charset;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.HashMap;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.Map;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.Map.Entry;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.Set;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.Vector;  </br></br>
  
</span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
 * </span><span style="color: #808080">@author</span><span style="color: #008000"> Wiker Yong Email:&lt;a href="mailto:wikeryong@gmail.com"&gt;wikeryong@gmail.com&lt;/a&gt; </br>
 * @date 2013-11-8 下午7:22:43 </br>
 * </span><span style="color: #808080">@version</span><span style="color: #008000"> 1.0-SNAPSHOT </br>
 </span><span style="color: #008000">*/</span>  </br>
<span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> HttpUtils {  </br></br>
  
    </span><span style="color: #0000ff">private</span><span style="color: #000000"> String defaultContentEncoding;  </br></br>
  
    </span><span style="color: #0000ff">public</span><span style="color: #000000"> HttpUtils() {  </br>
        </span><span style="color: #0000ff">this</span>.defaultContentEncoding =<span style="color: #000000"> Charset.defaultCharset().name();  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送GET请求 
     *  
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlString  URL地址 </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响应对象</br> 
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> HttpRespons sendGet(String urlString) <span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span>.send(urlString, "GET", <span style="color: #0000ff">null</span>, <span style="color: #0000ff">null</span><span style="color: #000000">);  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送GET请求 </br>
     *  </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlString  URL地址 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> params 参数集合 </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响应对象 </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> HttpRespons sendGet(String urlString, Map&lt;String, String&gt; params) <span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span>.send(urlString, "GET", params, <span style="color: #0000ff">null</span><span style="color: #000000">);  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送GET请求 </br>
     *  </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlString URL地址 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> params 参数集合 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> propertys 请求属性 </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响应对象 </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> HttpRespons sendGet(String urlString, Map&lt;String, String&gt; params, Map&lt;String, String&gt;<span style="color: #000000"> propertys)  </br>
            </span><span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span>.send(urlString, "GET"<span style="color: #000000">, params, propertys);  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送POST请求 </br>
     *  </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlString URL地址 </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响应对象 </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> HttpRespons sendPost(String urlString) <span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span>.send(urlString, "POST", <span style="color: #0000ff">null</span>, <span style="color: #0000ff">null</span><span style="color: #000000">);  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"></br> 
     * 发送POST请求 </br>
     *  </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlString URL地址 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> params 参数集合 </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响应对象 </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException </br>
     </span><span style="color: #008000">*/</span> </br> 
    <span style="color: #0000ff">public</span> HttpRespons sendPost(String urlString, Map&lt;String, String&gt; params) <span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span>.send(urlString, "POST", params, <span style="color: #0000ff">null</span><span style="color: #000000">);  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送POST请求 </br>
     *  </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlString URL地址 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> params 参数集合 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> propertys 请求属性 </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响应对象 </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> HttpRespons sendPost(String urlString, Map&lt;String, String&gt; params, Map&lt;String, String&gt;<span style="color: #000000"> propertys)  </br>
            </span><span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span>.send(urlString, "POST"<span style="color: #000000">, params, propertys);  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送HTTP请求 </br>
     *  </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlString 地址 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> method  get/post </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> parameters  添加由键值对指定的请求参数 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> propertys  添加由键值对指定的一般请求属性 </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响映对象 </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException</br> 
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">private</span> HttpRespons send(String urlString, String method, Map&lt;String, String&gt;<span style="color: #000000"> parameters,  </br>
            Map</span>&lt;String, String&gt; propertys) <span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        HttpURLConnection urlConnection </span>= <span style="color: #0000ff">null</span><span style="color: #000000">;  </br></br>
  
        </span><span style="color: #0000ff">if</span> (method.equalsIgnoreCase("GET") &amp;&amp; parameters != <span style="color: #0000ff">null</span><span style="color: #000000">) {  </br>
            StringBuffer param </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> StringBuffer();  </br>
            </span><span style="color: #0000ff">int</span> i = 0<span style="color: #000000">;  </br>
            </span><span style="color: #0000ff">for</span><span style="color: #000000"> (String key : parameters.keySet()) {  </br>
                </span><span style="color: #0000ff">if</span> (i == 0<span style="color: #000000">)  </br>
                    param.append(</span>"?"<span style="color: #000000">);  </br>
                </span><span style="color: #0000ff">else</span><span style="color: #000000">  </br>
                    param.append(</span>"&amp;"<span style="color: #000000">);  </br>
                param.append(key).append(</span>"="<span style="color: #000000">).append(parameters.get(key));  </br>
                i</span>++<span style="color: #000000">;  </br>
            }  </br>
            urlString </span>+=<span style="color: #000000"> param;  </br>
        }  </br></br>
  
        URL url </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> URL(urlString);  </br>
        urlConnection </span>=<span style="color: #000000"> (HttpURLConnection) url.openConnection();  </br>
        urlConnection.setRequestMethod(method);  </br>
        urlConnection.setDoOutput(</span><span style="color: #0000ff">true</span><span style="color: #000000">);  </br>
        urlConnection.setDoInput(</span><span style="color: #0000ff">true</span><span style="color: #000000">);  </br>
        urlConnection.setUseCaches(</span><span style="color: #0000ff">false</span><span style="color: #000000">);  </br></br>
  
        </span><span style="color: #0000ff">if</span> (propertys != <span style="color: #0000ff">null</span><span style="color: #000000">)  </br>
            </span><span style="color: #0000ff">for</span><span style="color: #000000"> (String key : propertys.keySet()) {  </br>
                urlConnection.addRequestProperty(key, propertys.get(key));  </br>
            }  </br></br>
  
        </span><span style="color: #0000ff">if</span> (method.equalsIgnoreCase("POST") &amp;&amp; parameters != <span style="color: #0000ff">null</span><span style="color: #000000">) {  </br>
            StringBuffer param </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> StringBuffer();  </br>
            </span><span style="color: #0000ff">for</span><span style="color: #000000"> (String key : parameters.keySet()) {  </br>
                param.append(</span>"&amp;"<span style="color: #000000">);  </br>
                param.append(key).append(</span>"="<span style="color: #000000">).append(parameters.get(key));  </br>
            }  </br>
            urlConnection.getOutputStream().write(param.toString().getBytes());  </br>
            urlConnection.getOutputStream().flush();  </br>
            urlConnection.getOutputStream().close();  </br>
        }  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span><span style="color: #000000">.makeContent(urlString, urlConnection);  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 得到响应对象 </br>
     *  </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> urlConnection </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> 响应对象 </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">private</span> HttpRespons makeContent(String urlString, HttpURLConnection urlConnection) <span style="color: #0000ff">throws</span><span style="color: #000000"> IOException {  </br>
        HttpRespons httpResponser </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> HttpRespons();  </br>
        </span><span style="color: #0000ff">try</span><span style="color: #000000"> {  </br>
            InputStream in </span>=<span style="color: #000000"> urlConnection.getInputStream();  </br>
            BufferedReader bufferedReader </span>= <span style="color: #0000ff">new</span> BufferedReader(<span style="color: #0000ff">new</span><span style="color: #000000"> InputStreamReader(in));  </br>
            httpResponser.contentCollection </span>= <span style="color: #0000ff">new</span> Vector&lt;String&gt;<span style="color: #000000">();  </br>
            StringBuffer temp </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> StringBuffer();  </br>
            String line </span>=<span style="color: #000000"> bufferedReader.readLine();  </br>
            </span><span style="color: #0000ff">while</span> (line != <span style="color: #0000ff">null</span><span style="color: #000000">) {  </br>
                httpResponser.contentCollection.add(line);  </br>
                temp.append(line).append(</span>"
"<span style="color: #000000">);  </br>
                line </span>=<span style="color: #000000"> bufferedReader.readLine();</br>
            }  </br>
            bufferedReader.close();  </br>
            String ecod </span>=<span style="color: #000000"> urlConnection.getContentEncoding();  </br>
            </span><span style="color: #0000ff">if</span> (ecod == <span style="color: #0000ff">null</span><span style="color: #000000">)  </br>
                ecod </span>= <span style="color: #0000ff">this</span><span style="color: #000000">.defaultContentEncoding;  </br>
            httpResponser.urlString </span>=<span style="color: #000000"> urlString; </br> 
            httpResponser.defaultPort </span>=<span style="color: #000000"> urlConnection.getURL().getDefaultPort();  </br>
            httpResponser.file </span>=<span style="color: #000000"> urlConnection.getURL().getFile();  </br>
            httpResponser.host </span>=<span style="color: #000000"> urlConnection.getURL().getHost();  </br>
            httpResponser.path </span>=<span style="color: #000000"> urlConnection.getURL().getPath();  </br>
            httpResponser.port </span>=<span style="color: #000000"> urlConnection.getURL().getPort();  </br>
            httpResponser.protocol </span>=<span style="color: #000000"> urlConnection.getURL().getProtocol();  </br>
            httpResponser.query </span>=<span style="color: #000000"> urlConnection.getURL().getQuery();  </br>
            httpResponser.ref </span>=<span style="color: #000000"> urlConnection.getURL().getRef();  </br>
            httpResponser.userInfo </span>=<span style="color: #000000"> urlConnection.getURL().getUserInfo();  </br>
            httpResponser.content </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> String(temp.toString().getBytes(), ecod);  </br>
            httpResponser.contentEncoding </span>=<span style="color: #000000"> ecod; </br> 
            httpResponser.code </span>=<span style="color: #000000"> urlConnection.getResponseCode();  </br>
            httpResponser.message </span>=<span style="color: #000000"> urlConnection.getResponseMessage();  </br>
            httpResponser.contentType </span>=<span style="color: #000000"> urlConnection.getContentType();  </br>
            httpResponser.method </span>=<span style="color: #000000"> urlConnection.getRequestMethod();  </br>
            httpResponser.connectTimeout </span>=<span style="color: #000000"> urlConnection.getConnectTimeout();  </br>
            httpResponser.readTimeout </span>=<span style="color: #000000"> urlConnection.getReadTimeout();  </br>
            </span><span style="color: #0000ff">return</span><span style="color: #000000"> httpResponser; </br> 
        } </span><span style="color: #0000ff">catch</span><span style="color: #000000"> (IOException e) { </br> 
            </span><span style="color: #0000ff">throw</span><span style="color: #000000"> e;  </br>
        } </span><span style="color: #0000ff">finally</span><span style="color: #000000"> {  </br>
            </span><span style="color: #0000ff">if</span> (urlConnection != <span style="color: #0000ff">null</span><span style="color: #000000">)  </br>
                urlConnection.disconnect();</br>  
        }  </br>
    }  </br></br>
  
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 默认的响应字符集 </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span><span style="color: #000000"> String getDefaultContentEncoding() {  </br>
        </span><span style="color: #0000ff">return</span> <span style="color: #0000ff">this</span><span style="color: #000000">.defaultContentEncoding;  </br>
    }  </br></br></br>
  
      
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送GET请求 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> url </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> params </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> headers </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000"> </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> Exception </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span><span style="color: #000000"> URLConnection sendGetRequest(String url,  
            Map</span>&lt;String, String&gt; params, Map&lt;String, String&gt;<span style="color: #000000"> headers)  </br>
            </span><span style="color: #0000ff">throws</span><span style="color: #000000"> Exception {  </br>
        StringBuilder buf </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> StringBuilder(url);  </br>
        Set</span>&lt;Entry&lt;String, String&gt;&gt; entrys = <span style="color: #0000ff">null</span><span style="color: #000000">;  </br>
        </span><span style="color: #008000">//</span><span style="color: #008000"> 如果是GET请求，则请求参数在URL中  </span></br>
        <span style="color: #0000ff">if</span> (params != <span style="color: #0000ff">null</span> &amp;&amp; !<span style="color: #000000">params.isEmpty()) {  </br>
            buf.append(</span>"?"<span style="color: #000000">);  </br>
            entrys </span>=<span style="color: #000000"> params.entrySet();  </br>
            </span><span style="color: #0000ff">for</span> (Map.Entry&lt;String, String&gt;<span style="color: #000000"> entry : entrys) {  </br>
                buf.append(entry.getKey()).append(</span>"="<span style="color: #000000">)  </br>
                        .append(URLEncoder.encode(entry.getValue(), </span>"UTF-8"<span style="color: #000000">))  </br>
                        .append(</span>"&amp;"<span style="color: #000000">);  </br>
            }  </br>
            buf.deleteCharAt(buf.length() </span>- 1<span style="color: #000000">);  </br>
        }  </br>
        URL url1 </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> URL(buf.toString());  </br>
        HttpURLConnection conn </span>=<span style="color: #000000"> (HttpURLConnection) url1.openConnection();  </br>
        conn.setRequestMethod(</span>"GET"<span style="color: #000000">);  </br>
        </span><span style="color: #008000">//</span><span style="color: #008000"> 设置请求头  </span></br>
        <span style="color: #0000ff">if</span> (headers != <span style="color: #0000ff">null</span> &amp;&amp; !<span style="color: #000000">headers.isEmpty()) {  </br>
            entrys </span>=<span style="color: #000000"> headers.entrySet();  </br>
            </span><span style="color: #0000ff">for</span> (Map.Entry&lt;String, String&gt;<span style="color: #000000"> entry : entrys) {  </br>
                conn.setRequestProperty(entry.getKey(), entry.getValue());  </br>
            }  </br>
        }  </br>
        conn.getResponseCode();  </br>
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> conn;  </br>
    }  </br>
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 发送POST请求 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> url    </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> params </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> headers </br>
     * </span><span style="color: #808080">@return</span><span style="color: #008000">  </br>
     * </span><span style="color: #808080">@throws</span><span style="color: #008000"> Exception </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span><span style="color: #000000"> URLConnection sendPostRequest(String url,  </br>
            Map</span>&lt;String, String&gt; params, Map&lt;String, String&gt;<span style="color: #000000"> headers)  </br>
            </span><span style="color: #0000ff">throws</span><span style="color: #000000"> Exception {  </br>
        StringBuilder buf </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> StringBuilder();  </br>
        Set</span>&lt;Entry&lt;String, String&gt;&gt; entrys = <span style="color: #0000ff">null</span><span style="color: #000000">; </br> 
        </span><span style="color: #008000">//</span><span style="color: #008000"> 如果存在参数，则放在HTTP请求体，形如name=aaa&amp;age=10  </span></br>
        <span style="color: #0000ff">if</span> (params != <span style="color: #0000ff">null</span> &amp;&amp; !<span style="color: #000000">params.isEmpty()) {  </br>
            entrys </span>=<span style="color: #000000"> params.entrySet();  </br>
            </span><span style="color: #0000ff">for</span> (Map.Entry&lt;String, String&gt;<span style="color: #000000"> entry : entrys) {  </br>
                buf.append(entry.getKey()).append(</span>"="<span style="color: #000000">)  </br>
                        .append(URLEncoder.encode(entry.getValue(), </span>"UTF-8"<span style="color: #000000">))  </br>
                        .append(</span>"&amp;"<span style="color: #000000">);  </br>
            }  </br>
            buf.deleteCharAt(buf.length() </span>- 1<span style="color: #000000">);  </br>
        }  </br>
        URL url1 </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> URL(url);</br>  
        HttpURLConnection conn </span>=<span style="color: #000000"> (HttpURLConnection) url1.openConnection();</br>  
        conn.setRequestMethod(</span>"POST"<span style="color: #000000">);  </br>
        conn.setDoOutput(</span><span style="color: #0000ff">true</span><span style="color: #000000">);  </br>
        OutputStream out </span>=<span style="color: #000000"> conn.getOutputStream();  </br>
        out.write(buf.toString().getBytes(</span>"UTF-8"<span style="color: #000000">));  </br>
        </span><span style="color: #0000ff">if</span> (headers != <span style="color: #0000ff">null</span> &amp;&amp; !<span style="color: #000000">headers.isEmpty()) {  </br>
            entrys </span>=<span style="color: #000000"> headers.entrySet();  </br>
            </span><span style="color: #0000ff">for</span> (Map.Entry&lt;String, String&gt;<span style="color: #000000"> entry : entrys) {  </br>
                conn.setRequestProperty(entry.getKey(), entry.getValue());  </br>
            }  </br>
        }  </br>
        conn.getResponseCode(); </span><span style="color: #008000">//</span><span style="color: #008000"> 为了发送成功  </span></br>
        <span style="color: #0000ff">return</span><span style="color: #000000"> conn;  </br>
    }  </br>
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能: </br>
     *   &lt;FORM METHOD=POST ACTION="</span><span style="color: #008000; text-decoration: underline">http://192.168.0.200</span><span style="color: #008000">:8080/ssi/fileload/test.do" enctype="multipart/form-data"&gt; </br>
            &lt;INPUT TYPE="text" NAME="name"&gt; </br>
            &lt;INPUT TYPE="text" NAME="id"&gt; </br>
            &lt;input type="file" name="imagefile"/&gt; </br>
            &lt;input type="file" name="zip"/&gt; </br>
         &lt;/FORM&gt; </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试) </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> params 请求参数 key为参数名,value为参数值 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> file 上传文件 </br>
     </span><span style="color: #008000">*/</span></br>  
    <span style="color: #0000ff">public</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">boolean</span> uploadFiles(String path, Map&lt;String, String&gt; params, FormFile[] files) <span style="color: #0000ff">throws</span><span style="color: #000000"> Exception{      </br> 
        </span><span style="color: #0000ff">final</span> String BOUNDARY = "---------------------------7da2137580612"; <span style="color: #008000">//</span><span style="color: #008000">数据分隔线  </span></br>
        <span style="color: #0000ff">final</span> String endline = "--" + BOUNDARY + "--
";<span style="color: #008000">//</span><span style="color: #008000">数据结束标志  </span></br></br>
          
        <span style="color: #0000ff">int</span> fileDataLength = 0<span style="color: #000000">;  </br>
        </span><span style="color: #0000ff">if</span>(files!=<span style="color: #0000ff">null</span>&amp;&amp;files.length!=0<span style="color: #000000">){  </br>
            </span><span style="color: #0000ff">for</span>(FormFile uploadFile : files){<span style="color: #008000">//</span><span style="color: #008000">得到文件类型数据的总长度  </span></br>
                StringBuilder fileExplain = <span style="color: #0000ff">new</span><span style="color: #000000"> StringBuilder();  </br>
                fileExplain.append(</span>"--"<span style="color: #000000">);  </br>
                fileExplain.append(BOUNDARY);  </br>
                fileExplain.append(</span>"
"<span style="color: #000000">);  </br>
                fileExplain.append(</span>"Content-Disposition: form-data;name=""+ uploadFile.getParameterName()+"";filename=""+ uploadFile.getFilname() + ""
"<span style="color: #000000">);  </br>
                fileExplain.append(</span>"Content-Type: "+ uploadFile.getContentType()+"

"<span style="color: #000000">);  </br>
                fileExplain.append(</span>"
"<span style="color: #000000">);  </br>
                fileDataLength </span>+=<span style="color: #000000"> fileExplain.length();  </br>
                </span><span style="color: #0000ff">if</span>(uploadFile.getInStream()!=<span style="color: #0000ff">null</span><span style="color: #000000">){  </br>
                    fileDataLength </span>+=<span style="color: #000000"> uploadFile.getFile().length();  </br>
                }</span><span style="color: #0000ff">else</span><span style="color: #000000">{  </br>
                    fileDataLength </span>+=<span style="color: #000000"> uploadFile.getData().length;  </br>
                }  </br>
            }  </br>
        }  </br>
        StringBuilder textEntity </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> StringBuilder();  </br>
        </span><span style="color: #0000ff">if</span>(params!=<span style="color: #0000ff">null</span>&amp;&amp;!<span style="color: #000000">params.isEmpty()){  </br>
            </span><span style="color: #0000ff">for</span> (Map.Entry&lt;String, String&gt; entry : params.entrySet()) {<span style="color: #008000">//</span><span style="color: #008000">构造文本类型参数的实体数据  </span></br>
                textEntity.append("--"<span style="color: #000000">);  </br>
                textEntity.append(BOUNDARY);  </br>
                textEntity.append(</span>"
"<span style="color: #000000">);  </br>
                textEntity.append(</span>"Content-Disposition: form-data; name=""+ entry.getKey() + ""

"<span style="color: #000000">);  </br>
                textEntity.append(entry.getValue());  </br>
                textEntity.append(</span>"
"<span style="color: #000000">);  </br>
            }  </br>
        }  </br>
        </span><span style="color: #008000">//</span><span style="color: #008000">计算传输给服务器的实体数据总长度  </span></br>
        <span style="color: #0000ff">int</span> dataLength = textEntity.toString().getBytes().length + fileDataLength +<span style="color: #000000">  endline.getBytes().length; </br></br> 
          
        URL url </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> URL(path); </br> 
        </span><span style="color: #0000ff">int</span> port = url.getPort()==-1 ? 80<span style="color: #000000"> : url.getPort();  </br>
        Socket socket </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> Socket(InetAddress.getByName(url.getHost()), port);     </br>     
        OutputStream outStream </span>=<span style="color: #000000"> socket.getOutputStream();  </br>
        </span><span style="color: #008000">//</span><span style="color: #008000">下面完成HTTP请求头的发送  </span></br>
        String requestmethod = "POST "+ url.getPath()+" HTTP/1.1
"<span style="color: #000000">;  </br>
        outStream.write(requestmethod.getBytes());  </br>
        String accept </span>= "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
"<span style="color: #000000">;  </br>
        outStream.write(accept.getBytes());  </br>
        String language </span>= "Accept-Language: zh-CN
"<span style="color: #000000">;  </br>
        outStream.write(language.getBytes());  </br>
        String contenttype </span>= "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "
"<span style="color: #000000">;</br>  
        outStream.write(contenttype.getBytes());  </br>
        String contentlength </span>= "Content-Length: "+ dataLength + "
"<span style="color: #000000">;  </br>
        outStream.write(contentlength.getBytes());  </br>
        String alive </span>= "Connection: Keep-Alive
"<span style="color: #000000">;  </br>
        outStream.write(alive.getBytes());  </br>
        String host </span>= "Host: "+ url.getHost() +":"+ port +"
"<span style="color: #000000">;  </br>
        outStream.write(host.getBytes());  </br>
        </span><span style="color: #008000">//</span><span style="color: #008000">写完HTTP请求头后根据HTTP协议再写一个回车换行  </span></br>
        outStream.write("
"<span style="color: #000000">.getBytes());  </br>
        </span><span style="color: #008000">//</span><span style="color: #008000">把所有文本类型的实体数据发送出来  </span></br>

            outStream.write(textEntity.toString().getBytes());           


//把所有文件类型的实体数据发送出来  


if(files!=null&&files.length!=0){  


for(FormFile uploadFile : files){  


StringBuilder fileEntity = new StringBuilder();  


fileEntity.append("--");  


fileEntity.append(BOUNDARY);  


fileEntity.append("
");  


fileEntity.append("Content-Disposition: form-data;name=""+ uploadFile.getParameterName()+"";filename=""+ uploadFile.getFilname() + ""
"); 


fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"

");  


outStream.write(fileEntity.toString().getBytes());  


if(uploadFile.getInStream()!=null){  


byte[] buffer = new byte[1024];  


int len = 0;  


while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){  


outStream.write(buffer, 0, len);  


}  


uploadFile.getInStream().close();  


}else{  


outStream.write(uploadFile.getData(), 0, uploadFile.getData().length); 


}  


outStream.write("
".getBytes());  


}  


}  


//下面发送数据结束标志，表示数据已经结束  

            outStream.write(endline.getBytes());  


BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));  


if(reader.readLine().indexOf("200")-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败  

return false;  


}  


outStream.flush();  


outStream.close();  


reader.close();  


socket.close();  


return true;  


}  


/  


* 提交数据到服务器  


* @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试)  


* @param params 请求参数 key为参数名,value为参数值  


* @param file 上传文件  


*/  


public static boolean uploadFile(String path, Map<String, String> params, FormFile file) throws Exception{  


return uploadFiles(path, params, new FormFile[]{file});  


}  


/ 


* 将输入流转为字节数组 


* @param inStream 


* @return 


* @throws Exception 


/  


public static byte[] read2Byte(InputStream inStream)throws Exception{  


ByteArrayOutputStream outSteam = new ByteArrayOutputStream();  


byte[] buffer = new byte[1024];  


int len = 0;  


while( (len = inStream.read(buffer)) !=-1 ){  


outSteam.write(buffer, 0, len);  


}  


outSteam.close();  


inStream.close();  


return outSteam.toByteArray();  


}  


/**


* 将输入流转为字符串 


* @param inStream


* @return 


* @throws Exception 


/  


public static String read2String(InputStream inStream)throws Exception{  


ByteArrayOutputStream outSteam = new ByteArrayOutputStream();


byte[] buffer = new byte[1024];  


int len = 0;  


while( (len = inStream.read(buffer)) !=-1 ){  


outSteam.write(buffer, 0, len);  


}  


outSteam.close();  


inStream.close();  


return new String(outSteam.toByteArray(),"UTF-8");  


}

/** 


* 发送xml数据 


* @param path 请求地址 


* @param xml xml数据 


* @param encoding 编码 


* @return 


* @throws Exception 


*/  


public static byte[] postXml(String path, String xml, String encoding) throws Exception{  


byte[] data = xml.getBytes(encoding);  


URL url = new URL(path);  


HttpURLConnection conn = (HttpURLConnection)url.openConnection();  


conn.setRequestMethod("POST");  


conn.setDoOutput(true);  


conn.setRequestProperty("Content-Type", "text/xml; charset="+ encoding);  


conn.setRequestProperty("Content-Length", String.valueOf(data.length));  


conn.setConnectTimeout(5 * 1000);  


OutputStream outStream = conn.getOutputStream();  


outStream.write(data);  


outStream.flush();  


outStream.close();  


if(conn.getResponseCode()200){  


return read2Byte(conn.getInputStream());  


}  


return null;  


}  


//测试函数  

public static void main(String args[]) throws Exception {  


Map<String, String> params = new HashMap<String, String>();  


params.put("name", "xiazdong");  


params.put("age", "10");  


HttpURLConnection conn = (HttpURLConnection)  


sendGetRequest(  


"http://192.168.0.103:8080/Server/PrintServlet",  


params, null);  


int code = conn.getResponseCode();  


InputStream in = conn.getInputStream();  


byte[]data = read2Byte(in);  


}  

    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 设置默认的响应字符集 </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setDefaultContentEncoding(String defaultContentEncoding) {  </br>
        </span><span style="color: #0000ff">this</span>.defaultContentEncoding =<span style="color: #000000"> defaultContentEncoding;  </br>
    }  </br>
}  </br>

需要引用到的文件FormFile.java如下：


package com.wiker;  


</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.File;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.FileInputStream;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.FileNotFoundException;  </br>
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.InputStream;  </br>
  
</span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
 * 上传文件 
 </span><span style="color: #008000">*/</span>  </br>
<span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> FormFile {  </br>
    </span><span style="color: #008000">/*</span><span style="color: #008000"> 上传文件的数据 </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">private</span> <span style="color: #0000ff">byte</span><span style="color: #000000">[] data;  </br>
    </span><span style="color: #0000ff">private</span><span style="color: #000000"> InputStream inStream;  </br>
    </span><span style="color: #0000ff">private</span><span style="color: #000000"> File file;  </br>
    </span><span style="color: #008000">/*</span><span style="color: #008000"> 文件名称 </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">private</span><span style="color: #000000"> String filname;  </br>
    </span><span style="color: #008000">/*</span><span style="color: #008000"> 请求参数名称</span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">private</span><span style="color: #000000"> String parameterName;  </br>
    </span><span style="color: #008000">/*</span><span style="color: #008000"> 内容类型 </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">private</span> String contentType = "application/octet-stream"<span style="color: #000000">;  </br></br>
      
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 此函数用来传输小文件 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> filname </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> data </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> parameterName </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> contentType </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span> FormFile(String filname, <span style="color: #0000ff">byte</span><span style="color: #000000">[] data, String parameterName, String contentType) {  </br>
        </span><span style="color: #0000ff">this</span>.data =<span style="color: #000000"> data;  </br>
        </span><span style="color: #0000ff">this</span>.filname =<span style="color: #000000"> filname;  </br>
        </span><span style="color: #0000ff">this</span>.parameterName =<span style="color: #000000"> parameterName;  </br>
        </span><span style="color: #0000ff">if</span>(contentType!=<span style="color: #0000ff">null</span>) <span style="color: #0000ff">this</span>.contentType =<span style="color: #000000"> contentType;  </br>
    }  </br>
    </span><span style="color: #008000">/**</span><span style="color: #008000"> </br>
     * 此函数用来传输大文件 </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> filname </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> file </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> parameterName </br>
     * </span><span style="color: #808080">@param</span><span style="color: #008000"> contentType </br>
     </span><span style="color: #008000">*/</span>  </br>
    <span style="color: #0000ff">public</span><span style="color: #000000"> FormFile(String filname, File file, String parameterName, String contentType) {  </br>
        </span><span style="color: #0000ff">this</span>.filname =<span style="color: #000000"> filname;  </br>
        </span><span style="color: #0000ff">this</span>.parameterName =<span style="color: #000000"> parameterName;  </br>
        </span><span style="color: #0000ff">this</span>.file =<span style="color: #000000"> file;  </br>
        </span><span style="color: #0000ff">try</span><span style="color: #000000"> {  </br>
            </span><span style="color: #0000ff">this</span>.inStream = <span style="color: #0000ff">new</span><span style="color: #000000"> FileInputStream(file);  </br>
        } </span><span style="color: #0000ff">catch</span><span style="color: #000000"> (FileNotFoundException e) {  </br>
            e.printStackTrace();  </br>
        }  </br>
        </span><span style="color: #0000ff">if</span>(contentType!=<span style="color: #0000ff">null</span>) <span style="color: #0000ff">this</span>.contentType =<span style="color: #000000"> contentType;  </br>
    }  </br></br>
      
    </span><span style="color: #0000ff">public</span><span style="color: #000000"> File getFile() {  </br>
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> file; </br> 
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span><span style="color: #000000"> InputStream getInStream() {  </br>
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> inStream;  </br>
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">byte</span><span style="color: #000000">[] getData() {  </br>
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> data;  </br>
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span><span style="color: #000000"> String getFilname() {  </br>
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> filname;  </br>
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setFilname(String filname) {  </br>
        </span><span style="color: #0000ff">this</span>.filname =<span style="color: #000000"> filname;  </br>
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span><span style="color: #000000"> String getParameterName() {  </br>
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> parameterName;  </br>
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setParameterName(String parameterName) {  </br>
        </span><span style="color: #0000ff">this</span>.parameterName =<span style="color: #000000"> parameterName;  </br>
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span><span style="color: #000000"> String getContentType() {  </br>
        </span><span style="color: #0000ff">return</span><span style="color: #000000"> contentType;  </br>
    }  </br></br>
  
    </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setContentType(String contentType) {  </br>
        </span><span style="color: #0000ff">this</span>.contentType =<span style="color: #000000"> contentType;  </br>
    }  </br></br>
      
}  </span></pre>
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原文地址：https://www.cnblogs.com/jpfss/p/8465846.html