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">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。