JAVA 解析响应HTTP请求

//http请求类
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Vector;
/**
 * HTTP请求
 */
public class HttpRequester
{
    /**
     * 默认响应字符集
     */
    private String defaultContentEncoding;
    public HttpRequester()
    {
        this.defaultContentEncoding = Charset.defaultCharset().name();
    }
    /**
     * 发送GET请求
     * @param urlString URL地址
     * @return 响应对象
     * @throws IOException
     */
    public HttpRespons sendGet(String urlString) throws IOException
    {
        return this.send(urlString, "GET", null, null);
    }
    /**
     * 发送GET请求
     * @param urlString URL地址
     * @param params 参数集合
     * @return 响应对象
     * @throws IOException
     */
    public HttpRespons sendGet(String urlString, Map<String, String> params) throws IOException
    {
        return this.send(urlString, "GET", params, null);
    }
    /**
     * 发送GET请求
     * @param urlString URL地址
     * @param params 参数集合
     * @param propertys 请求属性
     * @return 响应对象
     * @throws IOException
     */
    public HttpRespons sendGet(String urlString, Map<String, String> params, Map<String, String> propertys) throws IOException
    {
        return this.send(urlString, "GET", params, propertys);
    }
    /**
     * 发送POST请求
     * @param urlString URL地址
     * @return 响应对象
     * @throws IOException
     */
    public HttpRespons sendPost(String urlString) throws IOException
    {
        return this.send(urlString, "POST", null, null);
    }
    /**
     * 发送POST请求
     * @param urlString URL地址
     * @param params 参数集合
     * @return 响应对象
     * @throws IOException
     */
    public HttpRespons sendPost(String urlString, Map<String, String> params) throws IOException
    {
        return this.send(urlString, "POST", params, null);
    }
    /**
     * 发送POST请求
     * @param urlString URL地址
     * @param params 参数集合
     * @param propertys 请求属性
     * @return 响应对象
     * @throws IOException
     */
    public HttpRespons sendPost(String urlString, Map<String, String> params, Map<String, String> propertys) throws IOException
    {
        return this.send(urlString, "POST", params, propertys);
    }
    /**
     * 发送HTTP请求
     * @param urlString
     * @return 响应对象
     * @throws IOException
     */
    private HttpRespons send(String urlString, String method, Map<String, String> parameters, Map<String, String> propertys) throws IOException
    {
        HttpURLConnection urlConnection = null;
        if (method.equalsIgnoreCase("GET") && parameters != null)
        {
            StringBuffer param = new StringBuffer();
            int i = 0;
            for (String key : parameters.keySet())
            {
                if (i == 0)
                    param.append("?");
                else
                    param.append("&");
                param.append(key).append("=").append(parameters.get(key));
                // param.append(parameters.get(key));
                i++;
            }
            urlString += param;
        }
        URL url = new URL(urlString);
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod(method);
        urlConnection.setDoOutput(true);
        urlConnection.setDoInput(true);
        urlConnection.setUseCaches(false);
        if (propertys != null)
        {
            for (String key : propertys.keySet())
            {
                urlConnection.addRequestProperty(key, propertys.get(key));
            }
        }
        if (method.equalsIgnoreCase("POST") && parameters != null)
        {
            StringBuffer param = new StringBuffer();
            for (String key : parameters.keySet())
            {
                param.append("&");
                param.append(key).append("=").append(parameters.get(key));
                // param.append(parameters.get(key));
            }
            urlConnection.getOutputStream().write(param.toString().getBytes());
            urlConnection.getOutputStream().flush();
            urlConnection.getOutputStream().close();
        }
        return this.makeContent(urlString, urlConnection);
    }
    /**
     * 得到响应对象
     * @param urlConnection
     * @return 响应对象
     * @throws IOException
     */
    private HttpRespons makeContent(String urlString, HttpURLConnection urlConnection) throws IOException
    {
        HttpRespons httpResponser = new HttpRespons();
        try
        {
            InputStream in = urlConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
            httpResponser.contentCollection = new Vector<String>();
            StringBuffer temp = new StringBuffer();
            String line = bufferedReader.readLine();
            while (line != null)
            {
                httpResponser.contentCollection.add(line);
                temp.append(line).append("\r\n");
                line = bufferedReader.readLine();
            }
            bufferedReader.close();
            String ecod = urlConnection.getContentEncoding();
            if (ecod == null)
                ecod = this.defaultContentEncoding;
            httpResponser.urlString = urlString;
            httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();
            httpResponser.file = urlConnection.getURL().getFile();
            httpResponser.host = urlConnection.getURL().getHost();
            httpResponser.path = urlConnection.getURL().getPath();
            httpResponser.port = urlConnection.getURL().getPort();
            httpResponser.protocol = urlConnection.getURL().getProtocol();
            httpResponser.query = urlConnection.getURL().getQuery();
            httpResponser.ref = urlConnection.getURL().getRef();
            httpResponser.userInfo = urlConnection.getURL().getUserInfo();
            httpResponser.content = new String(temp.toString().getBytes(), ecod);
            httpResponser.contentEncoding = ecod;
            httpResponser.code = urlConnection.getResponseCode();
            httpResponser.message = urlConnection.getResponseMessage();
            httpResponser.contentType = urlConnection.getContentType();
            httpResponser.method = urlConnection.getRequestMethod();
            httpResponser.connectTimeout = urlConnection.getConnectTimeout();
            httpResponser.readTimeout = urlConnection.getReadTimeout();
            return httpResponser;
        }
        catch (IOException e)
        {
            throw e;
        }
        finally
        {
            if (urlConnection != null)
                urlConnection.disconnect();
        }
    }
    /**
     * 默认的响应字符集
     */
    public String getDefaultContentEncoding()
    {
        return this.defaultContentEncoding;
    }
    /**
     * 设置默认的响应字符集
     */
    public void setDefaultContentEncoding(String defaultContentEncoding)
    {
        this.defaultContentEncoding = defaultContentEncoding;
    }
}
 

import java.util.Vector;
/**
 * HTTP响应处理类
 */
public class HttpRespons
{
    String urlString;
    int defaultPort;
    String file;
    String host;
    String path;
    int port;
    String protocol;
    String query;
    String ref;
    String userInfo;
    String contentEncoding;
    String content;
    String contentType;
    public int code;
    String message;
    String method;
    int connectTimeout;
    int readTimeout;
    Vector<String> contentCollection;
    public static final int CODE_OK = 200;
    public String getContent()
    {
        return content;
    }
    public String getContentType()
    {
        return contentType;
    }
    public int getCode()
    {
        return code;
    }
    public String getMessage()
    {
        return message;
    }
    public Vector<String> getContentCollection()
    {
        return contentCollection;
    }
    public String getContentEncoding()
    {
        return contentEncoding;
    }
    public String getMethod()
    {
        return method;
    }
    public int getConnectTimeout()
    {
        return connectTimeout;
    }
    public int getReadTimeout()
    {
        return readTimeout;
    }
    public String getUrlString()
    {
        return urlString;
    }
    public int getDefaultPort()
    {
        return defaultPort;
    }
    public String getFile()
    {
        return file;
    }
    public String getHost()
    {
        return host;
    }
    public String getPath()
    {
        return path;
    }
    public int getPort()
    {
        return port;
    }
    public String getProtocol()
    {
        return protocol;
    }
    public String getQuery()
    {
        return query;
    }
    public String getRef()
    {
        return ref;
    }
    public String getUserInfo()
    {
        return userInfo;
    }
}
 

//测试客户端
import java.io.IOException;
public class TestHttp
{
    public static void main(String[] args) throws IOException
    {
        HttpRequester request = new HttpRequester();
        HttpRespons hr = request.sendGet("http://www.12306.cn/mormhweb/");
        String rsContent = hr.getContent();
        System.out.println(rsContent);
    }
}