Vue调用后端java接口的实例代码

(编辑：jimmy 日期: 2024/5/9 浏览：3 次 )

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="/UploadFiles/2021-04-02/vue.js">



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