android 获取服务器返回的json 乱码
由安卓端发送带数据的请求，
服务器接收 json及解析都是正确的，
在返回 android 端之前控制台输出的也是正确的
到 android 端就乱码了
（本程序在英文状态下能正常显示使用，程序没问题）
（1. 发送请求前）
（2. ）
（3. 数据在服务器）
（4. 安卓端再获取）
部分处理代码，未成功解决问题
JSONArray userarr = new JSONArray(userjson);
JSONObject userobj = userarr.getJSONObject(0);
byte[] byte1 = userobj.getString("gender").getBytes();
String str1 = new String(byte1,"utf-8");
Log.i(tag,"CLS: str1:"+str1+"$$$");
String str4 = new String(byte1,"gbk");
Log.i(tag,"CLS: str4:"+str4+"$$$");
String str5 = new String(byte1,"gb2312");
Log.i(tag,"CLS: str5:"+str5+"$$$");
String gender2 = userobj.getString("gender");
String str2 = new String(gender2.getBytes("utf-8"),"gbk");
Log.i(tag,"CLS: str2:"+str2+"$$$");
String str3 = new String(gender2.getBytes("utf-8"),"utf-8");
Log.i(tag,"CLS: str3:"+str3+"$$$");
/*********************/
/*****************************/
String gender = userobj.getString("gender");
String _gender = new String(gender.getBytes("iso-8859-1"),"gbk"); //编码解决3
byte[] bytes = gender.getBytes();
String str = new String(bytes, "gb2312"); //编码解决4
Log.i(tag,"CLS: _gender:"+_gender+"$$$");
Log.i(tag,"CLS: str:"+str+"$$$");
对应结果：
开发工具的编码进行设置成UTF-8了吗
服务器端
package pers.rfeng.sm.android;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import pers.rfeng.sm.dao.StudentDao;
import pers.rfeng.sm.dao.StudentDaoImpl;
import pers.rfeng.sm.model.Student;
public class CheckLoginStudent extends HttpServlet {
private static final long serialVersionUID = 1L;
private String username;
private String password;
private Student s; //要返回的对象
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8"); //设置编码
// response.setCharacterEncoding("utf-8");
response.setContentType("application/json;charset=utf-8");
/*******************************************/
System.out.println("CLStudent:接收到请求，数据处理中..."+"$$$");
/*******************************************/
/**
* 建立输入输出流
* 接收 android端数据
* 解析数据
* 返回验证结果
*/
InputStream is = request.getInputStream();
InputStreamReader isr = new InputStreamReader(is,"utf-8");
BufferedReader br = new BufferedReader(isr);
String userjson = br.readLine(); //获取 json串
/*******************************************/
System.out.println("CLStudent:userjson "+userjson.toString()+"$$$");
/*******************************************/
try{
JSONArray jsonArray = new JSONArray(userjson); //解析 json串，获取数据
JSONObject jsonObject = jsonArray.getJSONObject(0);
username = jsonObject.getString("username");
password = jsonObject.getString("password");
/*******************************************/
System.out.println("CLStudent:username|password "+username+"|"+password+"$$$");
/*******************************************/
StudentDao sm = new StudentDaoImpl();
s = sm.checkLogin(username, password);
/*******************************************/
System.out.println("CLStudent:验证结束！$$$");
/*******************************************/
OutputStream os = response.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
if(s!=null){
/*******************************************/
System.out.println("CLStudent:验证成功！$$$");
/*******************************************/
JSONArray userarr = new JSONArray(); //封装数据返回
JSONObject userobj = new JSONObject();
userobj.put("id", s.getId());
userobj.put("username", s.getUsername());
userobj.put("password", s.getPassword());
userobj.put("grade", s.getGrade());
userobj.put("age", s.getAge());
userobj.put("gender", s.getGender());
userarr.put(userobj);
/*******************************************/
System.out.println("CLStudent:userarr "+userarr.toString()+"$$$");
/*******************************************/
bw.write(userarr.toString());
bw.flush();
}else{
/*******************************************/
System.out.println("CLStudent:验证失败！$$$");
/*******************************************/
bw.write("error");
bw.flush();
}
if(bw!=null)
bw.close();
if(os!=null)
os.close();
if(osw!=null)
osw.close();
if(is!=null)
is.close();
if(isr!=null)
isr.close();
if(br!=null)
br.close();
} catch(JSONException jsone){jsone.printStackTrace();
}
}
}
安卓端
//（3）学生登录
public Student check(Student student){
username = student.getUsername();
password = student.getPassword();
/***************************************/
Log.i(tag,"CLS:username|password "+username+"|"+password+"$$$");
/***************************************/
try{
/***************************************/
Log.i(tag,"CLS:创建连接...$$$");
/***************************************/
url = new URL(urlStudent);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestProperty("Charset", "UTF-8"); //编码解决1
//发送数据
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Charset","UTF-8");
conn.connect(); //创建链接
/*********************************************/
Log.i(tag,"CLUser:连接成功！$$$");
Log.i(tag,"CLUser:数据传送准备...$$$");
/*********************************************/
//传送数据至服务器
OutputStream os = _conn.getOutputStream(); //建立输出流，写入数据至流发送到服务器
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);
/*********************************************/
Log.i(tag,"CL：username"+username+"$$$");
Log.i(tag,"CL：password"+password+"$$$");
JSONArray jsonArray = new JSONArray(); //封装数据为 json串
JSONObject jsonObject = new JSONObject();
jsonObject.put("username",username);
jsonObject.put("password",password);
jsonArray.put(jsonObject);
/*********************************************/
Log.i(tag,"CL：json"+jsonArray.toString()+"$$$");
bw.write(jsonArray.toString()); //将 json串写入流
bw.flush();
/*********************************************/
Log.i(tag,"CLUser:数据已传送$$$");
/*********************************************/
if(bw!=null)
bw.close();
if(os!=null)
os.close();
if(osw!=null)
osw.close();
//接收数据
/***************************************/
Log.i(tag,"CLS:接收数据...$$$");
/***************************************/
InputStream is = conn.getInputStream();
InputStreamReader isr = new InputStreamReader(is,"utf-8"); //编码解决2
/**
* 乱码问题，接收参数 json时。
*/
BufferedReader br = new BufferedReader(isr);
String userjson = br.readLine();
/*********************/
//测试乱码 stringbuffer
StringBuffer result = new StringBuffer("");
final String string = br.readLine();
if(string!=null){
result.append(string);
if(!result.equals("error")){
JSONArray ja = new JSONArray(string);
JSONObject jo = ja.getJSONObject(0);
String s1 = jo.getString("gender");
Log.i(tag,""+s1);
}
}
/*********************/
/*********************/
Log.i(tag,"CLS:userjson "+userjson.toString()+"$$$");
if(!userjson.equals("error")){
JSONArray userarr = new JSONArray(userjson);
JSONObject userobj = userarr.getJSONObject(0);
byte[] byte1 = userobj.getString("gender").getBytes();
String str1 = new String(byte1,"utf-8");
Log.i(tag,"CLS: str1:"+str1+"$$$");
String str4 = new String(byte1,"gbk");
Log.i(tag,"CLS: str4:"+str4+"$$$");
String str5 = new String(byte1,"gb2312");
Log.i(tag,"CLS: str5:"+str5+"$$$");
String gender2 = userobj.getString("gender");
String str2 = new String(gender2.getBytes("utf-8"),"gbk");
Log.i(tag,"CLS: str2:"+str2+"$$$");
String str3 = new String(gender2.getBytes("utf-8"),"utf-8");
Log.i(tag,"CLS: str3:"+str3+"$$$");
/*********************/
/*****************************/
String gender = userobj.getString("gender");
String _gender = new String(gender.getBytes("iso-8859-1"),"gbk"); //编码解决3
byte[] bytes = gender.getBytes();
String str = new String(bytes, "gb2312"); //编码解决4
Log.i(tag,"CLS: _gender:"+_gender+"$$$");
Log.i(tag,"CLS: str:"+str+"$$$");
Log.i(tag,"CLS: id:"+userobj.getInt("id")+"$$$");
Log.i(tag,"CLS: username:$$$");
Log.i(tag,"CLS: gender:"+userobj.getString("gender")+"$$$");
Log.i(tag,"CLS: age:"+userobj.getInt("age")+"$$$");
Log.i(tag,"CLS: grade:"+userobj.getInt("grade")+"$$$");
s = new Student();
s.setId(userobj.getInt("id"));
s.setUsername(username);
s.setPassword(password);
s.setGender(userobj.getString("gender"));
s.setAge(userobj.getInt("age"));
s.setGrade(userobj.getInt("grade"));
/*****************************/
Log.i(tag,"CLS: s:"+s.getId()+"$$$");
Log.i(tag,"CLS: s:"+s.getUsername()+"$$$");
Log.i(tag,"CLS: s:"+s.getGender()+"$$$");
Log.i(tag,"CLS: s:"+s.getAge()+"$$$");
Log.i(tag,"CLS: s:"+s.getGrade()+"$$$");
}
if(is!=null)
is.close();
if(isr!=null)
isr.close();
if(br!=null)
br.close();
} catch (JSONException jsone){jsone.printStackTrace();
} catch (IOException ioe){ioe.printStackTrace();}
return s;
}
OutputStreamWriter osw = new OutputStreamWriter(os);
问题已解决
OutputStreamWriter osw = new OutputStreamWriter(os，"utf-8");