定义文件拷贝工具类

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class FileCopyTools {
    public static void main(String[] args){
        copyFile("D:\\javaStudy\\javaworkspace/a.txt","d:/javaStudy/javaworkspace/b.txt");
    }
    /**
     * 文件拷贝方法，工具方法一般定义为静态方法
     * @param srcpath
     * @param despath
     */
    public static void copyFile(String srcpath,String despath){
        FileInputStream fis=null;
        BufferedInputStream bis=null;
        FileOutputStream fos=null;
        BufferedOutputStream bos=null;
        try{
            bis=new BufferedInputStream(new FileInputStream(srcpath));
            bos=new BufferedOutputStream(new FileOutputStream(despath));
            int temp=0;
            while((temp=bis.read())!=-1){
                bos.write(temp);
            }
            bos.flush();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            try{
                if(bis!=null){
                    bis.close();
                }
                if(fis!=null){
                    fis.close();
                }
                if(bos!=null){
                    bos.close();
                }
                if(fos!=null){
                    fos.close();
                }
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }
}