关于HttpClient4.3.*的Post和Get提交乱码问题

这个原因是服务器导致的，服务器比如tomcat接收get方法默认使用的是ISO-8859-1编码，而浏览器发送时文字编码是和页面编码保持一致的，如果页面是使用utf-8 编码 get方法文字自然是使用utf-8编码，但接收服务器没有设置的情况下用了ISO-8859-1编码接收，中文自然就成乱码了，不过由于ISO-8859-1编码是单字节编码所以我们可以使用getBytes("ISO-8859-1"),"utf-8"这样把文字重新转换成utf-8 编码。
第一个发送的文字是utf-8编码 而tomcat接收后用错误的ISO-8859-1编码了，这样getBytes("ISO-8859-1"）后会重新得到正确的utf-8编码的字节数组 ，然后用 new
String(request.getParameter("something").getBytes("ISO-8859-1"),"utf-8")重新将字节编码成UTF-8编码的文字这样文字就正确了。

如果是tomcat的话 server.xml文件里
<Connector port="80" protocol="HTTP/1.1"
connectionTimeout="20000"  redirectPort="8443" URIEncoding="UTF-8"/>
后边的URIEncoding就是设置get方法编码的如果没有指定URL接收的编码类型，自动会用ISO-8859-1编码

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package test;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

/**
* This example demonstrates how to abort an HTTP method before its normal completion.
*/
public class ClientAbortMethod {

public final static void main(String[] args) throws Exception {
//post();
get();
}

public static void get()
{
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
String strUrl = "http://127.0.0.1:8080/Test/servlet/GetTest?info=";
String strParam = URLEncoder.encode("你好", "utf-8");
strUrl += strParam;
HttpGet httpget = new HttpGet(strUrl);
System.out.println("Executing request " + httpget.getURI());
CloseableHttpResponse response = httpclient.execute(httpget);
try {
String strInfo = EntityUtils.toString(response.getEntity());
System.out.println(strInfo);
httpget.abort();
} finally {
response.close();
}
} catch(Exception e)
{
e.printStackTrace();
}
finally {
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void post()
{
try {
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
HttpEntity entity;
HttpPost httpost = new HttpPost("http://127.0.0.1:8080/Test/servlet/GetTest");
List <NameValuePair> nvps = new ArrayList <NameValuePair>();
nvps.add(new BasicNameValuePair("info", "kaxu中文"));
nvps.add(new BasicNameValuePair("password", "kaxu"));
httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
response = httpclient.execute(httpost);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

}

package com.neusoft;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class GetTest extends HttpServlet {

/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html;charset=utf-8");

PrintWriter out = response.getWriter();
String info = new String(request.getParameter("info").getBytes("ISO-8859-1"),"utf-8");
System.out.println(info);

out.flush();
out.close();
}

/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html");
PrintWriter out = response.getWriter();
request.setCharacterEncoding("utf-8");
String strInfo = request.getParameter("info");
String str1 = URLDecoder.decode(strInfo, "utf-8");
System.out.println(str1);

out.flush();
out.close();
}

}