java - 如何使用java API监控登录时间和注销时间并存储到mysql数据库中

Question

我正在尝试每当用户登录系统时，该特定的用户名和当前时间将被捕获并存储到 MySQL 数据库中。我的数据库表名称是 userName、systemLoginTime、systemLogoffTime。我已经尝试了很多次，但是当用户登录系统时，数据库中不受影响

This is my code java API:

import java.io.*;
import java.net.*;

public class Test
 {
    public static void main(String[] args) throws IOException {
        String userName = "";
        String systemLoginTime = "";
        URL url = new URL("http://localhost:8080/insert/{userName}/{systemLoginTime}");
        //Insert your JSON query request
        String query = "{'userName':USERNAME,'systemLoginTime':'TODAY'}";
        //It change the apostrophe char to double colon char, to form a correct JSON string
        query=query.replace("'", "\"");

        try{
            System.getenv().get("USERNAME");
        java.util.Date today = new java.util.Date();
        return new java.sql.Timestamp(today.getTime());
        //com.sun.security.auth.module.NTSystem().getName;
    String username = System.getProperty("user.name");
    System.out.println("username = " + username);
    //make connections
            URLConnection urlc = url.openConnection();
            //It Content Type is so importan to support JSON call
            urlc.setRequestProperty("Content-Type", "application/json");
            printMessage("Your URL: " + url.toString());
            //use post mode
            urlc.setDoOutput(true);
            urlc.setAllowUserInteraction(false);

            //send query
            PrintStream ps = new PrintStream(urlc.getOutputStream());
            ps.print(query);
            printMessage("Your Query: " + query);
            ps.close();

            //get result
            BufferedReader br = new BufferedReader(new InputStreamReader(urlc.getInputStream()));
            String l = null;
            while ((l=br.readLine())!=null) {
               printMessage(l);
            }
            br.close();
        } catch (Exception e){
            printMessage("Error ocurred");
            printMessage(e.toString());
        }

    }

    private static void printMessage(String s){
        System.out.println(s);
    }

 }

========================================

This is my Spring Boot Repository class

package com.example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

@Repository
public class MyCopRepo
{
    @Autowired
    JdbcTemplate jdbt;

    public String add(String userName, String systemLoginTime)
    {
        String userName1= userName;
    String systemLoginTime1=systemLoginTime; 
        //String systemLogoffTime1= systemLogoffTime;
        String query = "insert into mycopinsert(userName, systemLoginTime) values(?,?)";
        int i = jdbt.update(query, userName1, systemLoginTime1);
        if(i>0)
        {
            return "Inserted Successfully";
        }
        return "Not Inserted";
    }
}

================================================

This is my Controller class:
package com.example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyCopController
{
    @Autowired
    MyCopRepo ar;

    @PostMapping("/insert/{userName}/{systemLoginTime}")
    public String myCop(@PathVariable("userName") String userName, @PathVariable("systemLoginTime") String systemLoginTime)
    {
        return ar.add(userName, systemLoginTime);
    }
}

Answer 1

您可以尝试这样的方法，而不是作为参数传递，只需在查询数据库之前获取登录时间。

    public String add(String userName)
    {
        String userName1= userName;
        String systemLoginTime=java.sql.Timestamp(new Date().getTime());
        //String systemLogoffTime1= systemLogoffTime;
        String query = "insert into mycopinsert(userName, systemLoginTime) values(?,?)";
        int i = jdbt.update(query, userName1, systemLoginTime1);
        if(i>0)
        {
            return "Inserted Successfully";
        }
        return "Not Inserted";
    }
}

您还应该将代码封装在 main 中，创建对内容进行分组的方法(而不是在每个部分之前添加注释)，这样更容易理解且易于调试。