使用Java进行微信开发5 - 向用户发消息（无中文乱码问题）

package com.iris.wechat.message;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;

import javax.servlet.http.HttpServletRequest;

import com.iris.wechat.menu.AccessToken;

/**
* 向某个粉丝发送消息
* @author ifeng
* 关键代码：
// 获取URLConnection对象对应的输出流
//OutputStreamWriter outWriter = new OutputStreamWriter(conn.getOutputStream(), "utf-8");
//out = new PrintWriter(outWriter);
*
*/
public class SendMsgToFans {
/**
* 向指定 URL 发送POST方法的请求
*
* @param url
*            发送请求的 URL
* @param param
*            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
//设置通用的请求属性
conn.setRequestProperty("user-agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
OutputStreamWriter outWriter = new OutputStreamWriter(conn.getOutputStream(), "utf-8");
out = new PrintWriter(outWriter);
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
in = new BufferedReader(new InputStreamReader(conn.getInputStream()));result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常！"+e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}

/**
* 普通文本消息，需用户在48h与公共帐号有互动
* 微信公共账号发送给账号
* @param content 文本内容
* @param toUser(OPENID) 微信用户   OPENID
* @return
*/
public static void sendTextMessageToUser(HttpServletRequest request,String content,String toUser){
String json = "{\"touser\": \""+toUser+"\",\"msgtype\": \"text\", \"text\": {\"content\": \""+content+"\"}}";

//获取access_token
String accessToken = "";
try {
accessToken = AccessToken.getAccessToken();
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

//发送模版消息给指定用户
String action = "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token="+accessToken;

System.out.println("json:"+json);
try {
String result = sendPost(action, json);
System.out.println(result);
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args){
sendTextMessageToUser(null, "from Java Code 20180227中文","oywGU01DroVJisXmn5ql9JS378Ac");
}
}