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" >
<img src="ic_login_logo.png" alt="" class="login_logo">
<span >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" v-model="username">
</div>
<div class="login_input" >
<img src="ic_login_password.png" alt="" class="login_number">
<input type="text" value="请输入密码" v-model="password">
</div>
<button class="login_unselected" ></button>
<span >记住密码</span>
<button ><a href=""><span external nofollow" color: grey">立即注册</span></a></button>
<button @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>
