android到http中文乱码解决

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android端发送：
String params = "aaa=" + URLEncoder.encode(aaa, "utf-8")
+ "&bbb=" + bbb+ "&ccc="
+ ccc;

byte[] entity = params.getBytes();
   String path = "http://192.168.1.100:8080/myhttp/servlet/ListAction";
   HttpURLConnection conn = (HttpURLConnection) new URL(path)
     .openConnection();
   conn.setConnectTimeout(5000);
   conn.setRequestMethod("POST");
   conn.setDoOutput(true);
   conn.setRequestProperty("Content-Type",
     "application/x-www-form-urlencoded");
   conn.setRequestProperty("Content-Length",
     String.valueOf(entity.length));
   conn.getOutputStream().write(entity);

服务端：
response.setContentType("text/html;charset=utf-8");
  request.setCharacterEncoding("utf-8");
  response.setCharacterEncoding("utf-8");
  String aaa= request.getParameter("aaa");
  String bbb= request.getParameter("bbb");
  String ccc= request.getParameter("ccc");
  System.out.println("aaa="+aaa);
  System.out.println("bbb="+bbb);
  System.out.println("ccc="+ccc);