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android 仿微信demo——微信消息界面實現(xiàn)(服務端)

瀏覽：213日期：2022-06-03 17:56:24

目錄服務端微信消息頁實現(xiàn)測試總結(jié)

上一篇實現(xiàn)了移動端微信消息界面功能，以此為基礎繼續(xù)完善服務端功能

服務端微信消息頁實現(xiàn)

微信消息界面的實現(xiàn)，和登錄，注冊是類似的，無非就是接受客戶端數(shù)據(jù)，然后通過這個數(shù)據(jù)去數(shù)據(jù)庫查找，如果查得到話，返回相應值給客戶端。

在移動端中，當用戶輸入表單后點擊登陸，如果登陸成功，則會把微信號通過Itent傳給主界面activity,而在微信主界面點擊微信消息界面時，會把微信號作為fragment的參數(shù)傳給微信消息界面,然后通過把微信號數(shù)據(jù)發(fā)送給服務器，服務器接受到這消息，便會在數(shù)據(jù)庫中查找，查得到得話便會返回所以列給客戶端，而客戶端接受到數(shù)據(jù)后便把數(shù)據(jù)顯示到相應得組件上（這個功能在移動端已經(jīng)實現(xiàn)了）

創(chuàng)建Servlet WeixinInformation.java,實現(xiàn)服務端和客戶端的數(shù)據(jù)交互

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)送過來內(nèi)容的類型，application/json;charset=UTF-8System.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)過來的數(shù)據(jù)request.getInputStream()));String line = null;StringBuffer s = new StringBuffer();//StringBuffer String的區(qū)別，如果要對數(shù)據(jù)作?繁的修改，?t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，要我們自己導入WeixinList weixinList = JSON.parseObject(s.toString(), WeixinList.class);//是用了反射機制?磽瓿啥韻蟮姆獗//以utf-8解碼操作String number = URLDecoder.decode(weixinList.getNumber(), 'utf-8');System.out.println(weixinList);// 去數(shù)據(jù)庫完成用戶登錄功能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，?⒔Y(jié)果??建成json???禱亟o客?舳 JSONObject rjson = new JSONObject(); rjson.put('json', weixinList1); response.getOutputStream().write( rjson.toString().getBytes('UTF-8'));// 向客戶端發(fā)送一個帶有json對象內(nèi)容的響應} }}

上面代碼用到微信消息頁WeixinList實體類，下面將給出

實體類WeixinList.java

WeixinList.java

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 + ’’’ +’}’; }}

在service層中的接口UserService.java添加處理微信消息界面數(shù)據(jù)業(yè)務邏輯處理的抽象方法

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

在service層中的類UserServiceImpl.java重寫上面接口剛添加的方法

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; }

在dao層中的接口UserDao .java添加處理微信消息界面數(shù)據(jù)并操作數(shù)據(jù)庫的的抽象方法

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

在dao層中的類UserDaoImpl.java重寫上面接口剛添加的方法

@Override public WeixinList findInformation(String number) {//sqlString 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User對象中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; }

微信消息界面每一個列表至少有兩個圖片，而圖片不是存放在數(shù)據(jù)庫中的，數(shù)據(jù)庫存放得是圖片的地址，所以要在webapp目錄下創(chuàng)建存放圖片的目錄