这期内容当中小编将会给大家带来有关使用Vue怎么调用后端java接口，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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 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>
上述就是小编为大家分享的使用Vue怎么调用后端java接口了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注亿速云行业资讯频道。
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