// 编码参数
List<NameValuePair> formparams = new ArrayList<NameValuePair>(); // 请求参数
for (NameValuePair p : params) {
formparams.add(p);
}
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams,HTTP.UTF_8);
// 创建POST请求
HttpPost request = new HttpPost(url);
request.setEntity(entity);
Android发送HTTP请求，android默认编码已是utf-8。
问题描述：
如上代码中已经设置了请求为UTF-8，服务器中编码也是全部UTF-8，可是服务器获取中文还是出现乱码。
由于服务器端并非自己开发，无法看到服务器是如何运行的，只知道编码是UTF-8。
同样的服务器，IPHONE客户端发送中文无乱码。
问题解决：
尝试打印Andorid,IPHONE的HTTP头。
发现其中的content-type 不一样。
Andorid :content-type:application/x-www-form-urlencoded;
IPHONE:content-type:application/x-www-form-urlencoded; charset=utf-8
于是尝试在请求的时候加个头
request.setHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8");
然后问题解决。
1.创建HttpGet或HttpPost对象，将要请求的URL通过构造方法传入HttpGet或HttpPost对象。
2.使用DefaultHttpClient类的execute方法发送HTTP GET或HTTP POST请求，并返回HttpResponse对象。
3.通过HttpResponse接口的getEntity方法返回响应信息，并进行相应的处理。
如果使用HttpPost方法提交HTTP POST请求，还需要使用HttpPost类的setEntity方法设置请求参数。
本例使用了两个按钮来分别提交HTTP GET和HTTP POST请求，并从EditText组件中获得请求参数（bookname）值，最后将返回结果显示在TextView组件中。两个按钮共用一个onClick事件方法，代码如下：
public void onClick(View view)
{
// 读者需要将本例中的IP换成自己机器的IP
String url = "http://192.168.17.81:8080/querybooks/QueryServlet";
TextView tvQueryResult = (TextView) findViewById(R.id.tvQueryResult);
EditText etBookName = (EditText) findViewById(R.id.etBookName);
HttpResponse httpResponse = null;
try
{
switch (view.getId())
{
// 提交HTTP GET请求
case R.id.btnGetQuery:
// 向url添加请求参数
url += "?bookname=" + etBookName.getText().toString();
// 第1步：创建HttpGet对象
HttpGet httpGet = new HttpGet(url);
// 第2步：使用execute方法发送HTTP
GET请求，并返回HttpResponse对象
httpResponse = new DefaultHttpClient().execute(httpGet);
// 判断请求响应状态码，状态码为200表
示服务端成功响应了客户端的请求
if (httpResponse.getStatusLine().
getStatusCode() == 200)
{
// 第3步：使用getEntity方法获得返回结果
String result = EntityUtils.
toString(httpResponse.getEntity());
// 去掉返回结果中的"\r"字符，
否则会在结果字符串后面显示一个小方格
tvQueryResult.setText(result.replaceAll("\r", ""));
}
break;
// 提交HTTP POST请求
case R.id.btnPostQuery:
// 第1步：创建HttpPost对象
HttpPost httpPost = new HttpPost(url);
// 设置HTTP POST请求参数必须用NameValuePair对象
List<NameValuePair> params = new
ArrayList<NameValuePair>();
params.add(new BasicNameValuePair
("bookname", etBookName.getText(). toString()));
// 设置HTTP POST请求参数
httpPost.setEntity(new
UrlEncodedFormEntity(params, HTTP.UTF_8));
// 第2步：使用execute方法发送HTTP
POST请求，并返回HttpResponse对象
httpResponse = new DefaultHttpClient().
execute(httpPost);
if (httpResponse.getStatusLine().
getStatusCode() == 200)
{
// 第3步：使用getEntity方法获得返回结果
String result = EntityUtils.toString
(httpResponse.getEntity());
// 去掉返回结果中的"\r"字符，
否则会在结果字符串后面显示一个小方格
tvQueryResult.setText(result.replaceAll("\r", ""));
}
break;
}
}
catch (Exception e)
{
tvQueryResult.setText(e.getMessage());
}
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import android.util.Log;
public class RequestByHttpPost {
public static String TIME_OUT = "操作超时";
public static String doPost(List<NameValuePair> params,String url) throws Exception{
String result = null;
// 新建HttpPost对象
HttpPost httpPost = new HttpPost(url);
// 设置字符集
HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
// 设置参数实体
httpPost.setEntity(entity);
// 获取HttpClient对象
HttpClient httpClient = new DefaultHttpClient();
//连接超时
httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 30000);
//请求超时
httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 30000);
try {
// 获取HttpResponse实例
HttpResponse httpResp = httpClient.execute(httpPost);
// 判断是够请求成功
if (httpResp.getStatusLine().getStatusCode() == 200) {
// 获取返回的数据
result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
Log.i("HttpPost", "HttpPost方式请求成功，返回数据如下：");
Log.i("result", result);
} else {
Log.i("HttpPost", "HttpPost方式请求失败");
}
} catch (ConnectTimeoutException e){
result = TIME_OUT;
}
return result;
}
}
protected static CommResult HttpPost(Context context, String url,
HashMap<String, String> map) {
synchronized ("http post") {
CommResult result = new CommResult();
HttpClient httpClient = getNewHttpClient(context);
HttpPost httpPost = new HttpPost(url);
ArrayList<BasicNameValuePair> postDate = new ArrayList<BasicNameValuePair>();
Set<String> set = map.keySet();
Iterator<String> iterator = set.iterator();
while (iterator.hasNext()) {
String key = (String) iterator.next();
postDate.add(new BasicNameValuePair(key, map.get(key)));
}
try {
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(
postDate, HTTP.UTF_8);
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost);
InputStream in = response.getEntity().getContent();
int statusCode = response.getStatusLine().getStatusCode();
String message = InputStreamToString(in);
result.setMessage(message);
result.setResponseCode(String.valueOf(statusCode));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}
本篇文章来源于 Linux公社网站(www.linuxidc.com) 原文链接：http://www.linuxidc.com/Linux/2013-03/80178.htm
public Map<String, Object> CreateNote(int albumId, String title,
String remark) {
String noteId = "";
Map<String, Object> map = new HashMap<String, Object>();
try {
HttpParams parms = new BasicHttpParams();
parms.setParameter("charset", HTTP.UTF_8);
HttpConnectionParams.setConnectionTimeout(parms, 8 * 1000);
HttpConnectionParams.setSoTimeout(parms, 8 * 1000);
HttpClient httpclient = new DefaultHttpClient(parms);
HttpPost httppost = new HttpPost(ConfigHelper.CreateUri);
httppost.addHeader("Authorization", mToken);
httppost.addHeader("Content-Type", "application/json");
httppost.addHeader("charset", HTTP.UTF_8);
JSONObject obj = new JSONObject();
obj.put("title", title);
obj.put("categoryId", mCategoryId);
obj.put("sourceUrl", GetSourceUri());
JSONArray arr = new JSONArray();
arr.put(DateFormat.format("yyyyMM",Calendar.getInstance(Locale.CHINA)));
obj.put("tags", arr);
obj.put("content", remark);
httppost.setEntity(new StringEntity(obj.toString(), HTTP.UTF_8));
HttpResponse response;
response = httpclient.execute(httppost);
int code = response.getStatusLine().getStatusCode();
if (code == ConstanDefine.ErrorCode.SuccOfHttpStatusCode) {
String rev = EntityUtils.toString(response.getEntity());
obj = new JSONObject(rev);
noteId = obj.getString("id");
map.put("return_code", "0");
map.put("content", rev);
}
} catch (Exception e) {
if (map.containsKey("return_code")) {
map.remove("return_code");
}
map.put("return_code", "1");
}
return map;
}