package com.example.controller;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.example.pojo.WeixinList;
import com.example.service.UserServiceImpl;
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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URLDecoder;
@WebServlet(name = "WeixinInformation", value = "/WeixinInformation")
public class WeixinInformation extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request,response);
    }
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //設(shè)置字符編碼，防止中文亂碼
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("UTF-8");
        //以json數(shù)據(jù)完成操作
        response.setContentType("application/json;charset=UTF-8");
        System.out.println(request.getContentType());// 得到客戶端發(fā)送過來(lái)內(nèi)容的類型，application/json;charset=UTF-8
        System.out.println(request.getRemoteAddr());// 得到客戶端的ip地址，
        BufferedReader br = new BufferedReader(new InputStreamReader(// 使用字符流讀取客戶端發(fā)過來(lái)的數(shù)據(jù)
                request.getInputStream()));
        String line = null;
        StringBuffer s = new StringBuffer();//StringBuffer String的區(qū)別，如果要對(duì)數(shù)據(jù)作頻繁的修改，則用StringBuffer
        // 以一行的形式讀取數(shù)據(jù)
        while ((line = br.readLine()) != null) {
            s.append(line);
        }
        // 關(guān)閉io流
        br.close();
        System.out.println(s.toString());// 
        //JSON：這是json解析包，IDEA是沒有，要我們自己導(dǎo)入
        WeixinList weixinList = JSON.parseObject(s.toString(), WeixinList.class);//是用了反射機(jī)制來(lái)完成對(duì)象的封閉
        //以u(píng)tf-8解碼操作
        String number = URLDecoder.decode(weixinList.getNumber(), "utf-8");
        System.out.println(weixinList);
        // 去數(shù)據(jù)庫(kù)完成用戶登錄功能
        UserServiceImpl us = new UserServiceImpl();
        //調(diào)用登錄的方法
        WeixinList weixinList1 = us.informationUser(number);
        if(weixinList1 != null) {
            //將結(jié)果返回給客戶端	，將結(jié)果構(gòu)建成json數(shù)據(jù)返回給客戶端
            JSONObject rjson = new JSONObject();
            rjson.put("json", weixinList1);
            response.getOutputStream().write(
                    rjson.toString().getBytes("UTF-8"));// 向客戶端發(fā)送一個(gè)帶有json對(duì)象內(nèi)容的響應(yīng)
        }
    }
}

package com.example.pojo;
public class WeixinList {
    private int id;
    private String titleimg;
    private String title;
    private String content;
    private String time;
    private String showcode;
    private String number;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getTitleimg() {
        return titleimg;
    }
    public void setTitleimg(String titleimg) {
        this.titleimg = titleimg;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    public String getTime() {
        return time;
    }
    public void setTime(String time) {
        this.time = time;
    }
    public String getShowcode() {
        return showcode;
    }
    public void setShowcode(String showcode) {
        this.showcode = showcode;
    }
    public String getNumber() {
        return number;
    }
    public void setNumber(String number) {
        this.number = number;
    }
    @Override
    public String toString() {
        return "Information{" +
                "id=" + id +
                ", titleimg='" + titleimg + '\'' +
                ", title='" + title + '\'' +
                ", content='" + content + '\'' +
                ", time='" + time + '\'' +
                ", showcode='" + showcode + '\'' +
                ", number='" + number + '\'' +
                '}';
    }
}

  //微信消息列表
    WeixinList informationUser(String number);

    public WeixinList informationUser(String number) {
        //調(diào)用dao層完成數(shù)據(jù)查詢操作
        WeixinList information = ud.findInformation(number);
        return information;
    }

 //查詢微信消息列表
    WeixinList findInformation(String number);

    @Override
    public WeixinList findInformation(String number) {
        //sql
        String sql = "select * from weixinlist where number=?;";
        ResultSet rs = JDBCUtil.executeQuery(sql, number);
        //判斷是否查詢到用戶
        try {
            if (rs.next()) {
                //如果查詢到用戶，將用戶封裝到User對(duì)象中
                int id = rs.getInt("id");
                String titleimg = rs.getString("titleimg");
                String title1 = rs.getString("title");
                String content = rs.getString("content");
                String time = rs.getString("time");
                String showcode = rs.getString("showcode");
                String number1 = rs.getString("number");
                //將查詢到的用戶封裝到一個(gè)User對(duì)象中
                WeixinList weixinList = new WeixinList();
                weixinList .setId(id);
                weixinList .setTitleimg(titleimg);
                weixinList .setTitle(title1);
                weixinList .setContent(content);
                weixinList .setTime(time);
                weixinList .setShowcode(showcode);
                weixinList .setNumber(number1);
                System.out.println("查詢到的用戶" + weixinList);
                return weixinList;
            }
        }catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return null;
    }