android客户端

//设置一个handler对象（新开一个Thread需要一个handler对象发送message）
//根据发送过来的message进行相关的操作
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
Log.i("handler",msg.obj.toString());
break;
}
}
};
//新建一个方法负责开启新线程和HTTP通信
public void httpcon(){
new Thread(new Runnable() {
@Override
public void run() {
HttpURLConnection connection = null;
try {
URL url = new URL(urlpath);
connection = (HttpURLConnection) url.openConnection();
//设置post请求
connection.setRequestMethod("POST");
//如要进行POST请求下面两个必须设置
connection.setDoInput(true);//开启输出
connection.setDoOutput(true);//开启输入
connection.connect();
//传送JSON数据
Gson gson = new Gson();
OutputStream os = connection.getOutputStream();//创建输出流
os.write(gson.toJson(lp).getBytes());//通过流传输数据
os.flush();
os.close();
if (HttpURLConnection.HTTP_OK == connection.getResponseCode())
Log.i("flag","连接成功");
//读取服务端的响应信息
InputStream is = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String read = "";
StringBuilder result = new StringBuilder();
while ((read = reader.readLine()) != null)
result.append(read);
Log.i("flag2",result.toString());
//创建MESSAGE
Message message = handler.obtainMessage();
message.what = 1;
message.obj = result;
handler.sendMessage(message);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
connection.disconnect();
}
}
}).start();

Servlet端

尚未解决的问题①1.

public class DataUploading extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//设置request,response的编码，避免出现中文乱码
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
Connection con;
//创建输入流，获取从客户端发送过来的信息
InputStream is = request.getInputStream();
BufferedReader reader = new BufferedReader
(new InputStreamReader(is,"utf-8"));//utf-8解决中文乱码
String read = "";
StringBuilder result = new StringBuilder();
while((read = reader.readLine()) != null) {
result.append(read);
}
System.out.print(result.toString());
response.getOutputStream().write(result.toString().getBytes("UTF-8"));;
//使用getOutputStream.write输出响应信息给客户端
//getOutputStream.write输出为字节，所以要用getBytes("UTF-8")避免中文乱码。
//亦可使用PrintWriter进行字符输出
//PrintWriter out = response.getWriter();
//out.print();
}
}

最后

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