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糕小盐

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package org.example.io;import java.io.*;public class TestIO1 {    public static void main(String[]args)throws IOException {        if(args.length<2){            System.out.println("lack of param");        }        String input_path=args[0];        String output_path=args[1];        try(InputStream input=new FileInputStream(input_path);            OutputStream output=new FileOutputStream(output_path)){            input.transferTo(output);        }    }}
// win下的命令：java TestIO1.java D:\Learning\java_learning\io.txt D:\Learning\java_learning\o.txt
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