Vue.js调用后端java接口的实例代码

发布于 2020-11-30|

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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：

```java

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：

```xhtml

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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(){

}

})

```