Vue调用后端java接口的实例代码

时间：2021-05-26

前段时间 做了个学校的春萌项目，其中用到vue连接后端java接口。

先上后端接口代码：

package controller;import net.sf.json.JSONObject;import util.DBUtil;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 javax.servlet.http.HttpSession;import java.io.IOException;import java.sql.Connection;import java.sql.Date;import java.sql.PreparedStatement;import java.sql.ResultSet;@WebServlet(name = "login",urlPatterns = "/login")public class login extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(true); String username = request.getParameter("username"); String password = request.getParameter("password"); DBUtil dbUtil = new DBUtil(); Connection connection = dbUtil.getConnection(); PreparedStatement preparedStatement; ResultSet rs; String psw=""; String sql = "select password from `user` where username=?"; try { preparedStatement = connection.prepareStatement(sql); preparedStatement.setInt(1,Integer.parseInt(username)); rs = preparedStatement.executeQuery(); while (rs.next()){ psw = rs.getString("password"); } } catch (Exception e){ e.printStackTrace(); } if (password.equals(psw)){ session.setAttribute("username",username); response.getWriter().print("true"); } else response.getWriter().print("false"); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { }}

前端调用：

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Login</title> <script src="node_modules/vue/dist/vue.js"></script> <!--axios基于promise--> <script src="node_modules/axios/dist/axios.js"></script> <script src="login.js"></script> <script src="https://cdn.bootcss.com/vue-resource/1.5.1/vue-resource.min.js"></script> <link rel="stylesheet" href="login.css" rel="external nofollow" ></head><body><div class="login_interface" id="interface_height"> <img src="ic_login_logo.png" alt="" class="login_logo"> <span id="login_head">智慧图书管理平台</span> <div class="login_input"> <img src="ic_login_number.png" alt="" class="login_number"> <input type="text" value="请输入账号" id="input_number" v-model="username"> </div> <div class="login_input" id="add_top"> <img src="ic_login_password.png" alt="" class="login_number"> <input type="text" value="请输入密码" id="input_password" v-model="password"> </div> <button class="login_unselected" id="tick"></button> <span id="remember_password">记住密码</span> <button id="registered_now"><a href=""><span style=" rel="external nofollow" color: grey">立即注册</span></a></button> <button id="login" @click="login()">登录</button></div><script> new Vue({ el:'#interface_height', data:{ username:'', password:'' }, methods:{ login:function () { this.$http.post('login',{username:this.username,password:this.password},{emulateJSON:true}).then(function(res){ console.log(res.data); window.location.href = 'index.html'; },function(res){ console.log(res.status); }); } }, created:function(){ } })</script></body></html>

以上这篇Vue调用后端java接口的实例代码就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。

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