讲Java项目打包成jar(我使用的idea),在制作bat脚本访问,可以外部传递参数

先记录一个工具类,该类是将大文本文件分割,可以外部指定分割文件的大小

SplitFile.Java

package com.tencent.splitlarge.file;

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class SplitFile {

    public static void readFileByLines(String fileReadName,List<Integer> list) {
        if(list == null || list.size() < 1){
            throw new RuntimeException("输入的参数不正确");
        }
        String filePath = null;
        if(fileReadName.contains("/")){
            filePath = fileReadName.substring(0,fileReadName.lastIndexOf("/")+1);
        }
        if(fileReadName.contains("\\")){
            filePath = fileReadName.substring(0,fileReadName.lastIndexOf("\\")+1);
        }

        //需要切分的文件份数
       int size =  list.size();
        BufferedReader reader = null;

        long count = 0;
        String fileName = filePath + getDateString() + "_";
            //1-20,21 - 51,

        try {
            FileWriter writer = new FileWriter(fileName + 1 + ".txt", true);
            reader = new BufferedReader(new FileReader(fileReadName));
            String lineTxt = null;
            while ((lineTxt = reader.readLine()) != null) {
                count ++;
                writer.write(lineTxt);
                writer.write("\r\n");
                if(size > 1 && count >= list.get(0)){
                    writer.close();
                    writer = new FileWriter(fileName + 2 + ".txt", true);
                }
                if(size > 2 && count >= list.get(1) + list.get(0)){
                    writer.close();
                    writer = new FileWriter(fileName + 3 + ".txt", true);
                }
                if(size > 3 && count >= list.get(2) + list.get(1) + list.get(0)){
                    writer.close();
                    writer = new FileWriter(fileName + 4 + ".txt", true);
                }
                if(size > 4 && count >= list.get(3) + list.get(2) + list.get(1) + list.get(0)){
                    writer.close();
                    writer = new FileWriter(fileName + 5 + ".txt", true);
                }
            }
            writer.close();
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e1) {
                }
            }

        }
    }

    private static  String getDateString(){
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
        return dateFormat.format(new Date());
    }


    public static void main(String[] args) {
        String filePath = "D:\\test\\yy.txt";
        ArrayList<Integer> list = new ArrayList<>();
        list.add(100000);
        list.add(100000);
        list.add(100000);
        list.add(100000);
        list.add(100000);
        readFileByLines(filePath,list);

    }

}

在idea上点击file

打开项目结构:

选择Artifacts,点击+新增一个

按图中选择点击

选择main主类,指定启动类,按图中选择,将MANIFEST.MR文件的路径由java改为resources目录下面

选择main启动类

我的启动类如下,这个类,定义了一些由外部输入的参数,使用scanner来获取

package com.tencent.splitlarge.file;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

public class ApplicationMain {

    public static void main(String[]args){
        if(args.length <= 0 ){
            scannerInput();
        }
        killProcess();
    }

    private static void killProcess() {
        Runtime rt = Runtime.getRuntime();
        Process p = null;
        try {
            rt.exec("cmd.exe /C start wmic process where name='cmd.exe' call terminate");
            System.exit(0);
            System.out.println("退出成功!");
        } catch (IOException e) {
            System.out.println("退出失败!");
        }
    }

    private static void scannerInput() {
        Scanner scanner = new Scanner(System.in);
        while (true){
            System.out.print("请输入需要分割文件的路径(输入exit为退出)：");
            String filePath = scanner.nextLine();
            if(filePath.equals("exit")){
                killProcess();
            }
            ArrayList<Integer> list = new ArrayList<>();
            System.out.println("请输入需要分割文件的大小,使用逗号隔开");
            String countString = scanner.nextLine();
            String[] split = countString.split(",");
            for (String s : split) {
                int count = Integer.parseInt(s);
                list.add(count);
            }
            try {
                    SplitFile.readFileByLines(filePath,list);
                    System.out.println("分割成功,生成文件和父文件目录同级.");
                } catch (Exception e) {
                    System.out.println("分割文件失败!");
                }
        }
    }

}

选择本工程名称的jar,右键,新建一个directory,取名称为libs