Maven Web JSON

	javax.servlet
	javax.servlet-api
	4.0.1
	provided



	net.sf.json-lib
	json-lib
	2.4
	jdk15

package com.lmy.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.List;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

@WebServlet("/WebPage/ServletView")
public class ServletView extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //super.doGet(req, resp);
        OnHandle(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //super.doPost(req, resp);
        OnHandle(req, resp);
    }

    public void OnHandle(HttpServletRequest request, HttpServletResponse response) {

        PrintWriter writer = null;

        try {
            request.setCharacterEncoding("UTF-8");
            response.setCharacterEncoding("UTF-8");
            response.setContentType("application/json; charset=utf-8");
            response.addHeader("Access-Control-Allow-Origin", "*");//解决跨域问题: 允许所有来源访问
            response.addHeader("Access-Control-Allow-Method", "POST,GET");//解决跨域问题: 允许访问的方式
            writer = response.getWriter();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        JSONArray jsonArray = new JSONArray();

        for (int i = 1; i <= 10; i++) {
            JSONObject temp = new JSONObject();
            temp.put("hp", i*10);
            temp.put("atk", i);
            temp.put("def", 10-i);
            jsonArray.add(temp);
        }

        JSONObject data = new JSONObject();
        data.put("list", jsonArray);
        JSONObject json = new JSONObject();
        json.put("flag", "1"); // flag=1,表示成功；0表示失败
        json.put("msg", "成功");
        json.put("data", data);
        writer.append(json.toString());
    }
}

http://localhost:8080/project_003_war/WebPage/ServletView