jar 在服务器后台执行指定文件的main方法，并且日志写入到指定文件

package my.scan;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

/**
 * Hello world!
 */
public class App {
    public static void main(String[] args) throws IOException {

        String file = args[0];


        BufferedReader reader = new BufferedReader(new InputStreamReader(
                new FileInputStream(file), "utf-8"));

        String line = "";
        List<String> listData1 = new ArrayList<>();
        List<String> listData2 = new ArrayList<>();
        List<String> listData3 = new ArrayList<>();
        List<String> listData4 = new ArrayList<>();
        int index = 0;
        while ((line = reader.readLine()) != null) {
            if (null == line || line.equals("")) {
                continue;
            }
            line = line.replaceAll(" ", "");
            if (line.equals("")) {
                continue;
            }

            if (index % 4 == 0) {
                listData1.add(line);
                index++;
                continue;
            }
            if (index % 4 == 1) {
                listData2.add(line);
                index++;
                continue;
            }
            if (index % 4 == 2) {
                listData3.add(line);
                index++;
                continue;
            }
            if (index % 4 == 3) {
                listData4.add(line);
                index++;
                continue;
            }
        }

        System.out.println("listData1:" + listData1.size());
        System.out.println("listData2:" + listData2.size());
        System.out.println("listData3:" + listData3.size());
        System.out.println("listData4:" + listData4.size());

        ReadThread readThread1 = new ReadThread();
        readThread1.setListData(listData1);
        readThread1.start();

        ReadThread readThread2 = new ReadThread();
        readThread2.setListData(listData2);
        readThread2.start();

        ReadThread readThread3 = new ReadThread();
        readThread3.setListData(listData3);
        readThread3.start();

        ReadThread readThread4 = new ReadThread();
        readThread4.setListData(listData4);
        readThread4.start();
    }
}

　　

package my.scan;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.List;

/**
 * @author : xu
 * @date : 2020/6/10
 */
public class ReadThread extends Thread {

    public List<String> listData;


    @Override
    public void run() {

        int i = 0;

        for (String item : listData) {
            String[] content = item.split(",");
            if (content.length != 2 || content[0] == "") {
                System.out.println("formate error data." + item);
                continue;
            }

            String version = "";
            if (content[1].trim() != "") {
                version = "?ver=" + content[1];
            }

            String xmlParent = content[0].replace(".jpg", "") + "/";
            readData(xmlParent + "scene.xml" + version);
            i++;
            if (i % 50 == 0) {
                System.out.println(Thread.currentThread().getName() + "--" + i);
            }
        }

        System.out.println("done,size" + listData.size());
    }

    private void readData(String file) {
        if (!file.startsWith("http")) {
            return;
        }

        try {
            URL url = new URL(file);
            InputStream is = url.openStream();
            BufferedInputStream bis = new BufferedInputStream(is);
            StringBuffer sb = new StringBuffer();
            int len;
            byte[] temp = new byte[1024];
            while ((len = bis.read(temp)) != -1) {
                sb.append(new String(temp, 0, len));
            }

            if (!sb.toString().contains("scene")) {
                System.out.println("error file:" + file);
            }
        } catch (IOException e) {
            System.out.println("read file exception:" + file);
        }
    }

    public List<String> getListData() {
        return listData;
    }

    public void setListData(List<String> listData) {
        this.listData = listData;
    }
}

在服务器后台执行指定文件的main方法，并且日志写入到指定文件

 java -cp scene-1.0-SNAPSHOT.jar my.scan.App VR_Scene_CloudPath_ok.csv >>result.log 2>&1 &

执行后会返回程序的执行进程id。