FengXiao_monitor/src/main/java/com/example/demo/Controller/ipGetController.java

package com.example.demo.Controller;

import org.springframework.web.bind.annotation.*;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;

@RestController
public class ipGetController {

    public static String path = "D:\\demos\\src\\main\\resources\\static\\IP\\";

    @PostMapping("/saveIP")
    @ResponseBody
    static void saveIP(@RequestParam(value = "value",required = false) String IP){
        String id = IP.split("~~")[0];
        String ip = IP.split("~~")[1];
        File file = new File(path+id+".txt");
        if(file.exists()){
            file.delete();
        }
        try {
            file.createNewFile();
        }catch (Exception e){
            System.out.println(e);
        }
        try{
            FileWriter fw = new FileWriter(file);
            fw.write(ip);
            fw.flush();
            fw.close();
        }catch(Exception e){
            System.out.println(e);
        }


    }

    @GetMapping("/detectIP")
    @ResponseBody
    static int detectIP(@RequestParam(value = "ip",required = false) String IP){
        String id = IP.split("~~")[0];
        String ip = IP.split("~~")[1];
        File file = new File(path+id+".txt");
        if(!file.exists()){
            try {
                file.createNewFile();
                FileWriter fw = new FileWriter(file);
                fw.write(ip);
                fw.flush();
                fw.close();
                return 1;
            }catch (Exception e){
                System.out.println(e);
                return 0;
            }
        }
        else{
            try{
                FileReader fr = new FileReader(file);
                BufferedReader br = new BufferedReader(fr);
                String line = br.readLine();
                if(line.equals(ip)){
                    return 1;
                }
                else{
                    return 0;
                }
            }catch (Exception e){
                System.out.println(e);
                return 0;
            }
        }
    }
}