java使用IO进行txt文件内容的拷贝

java使用Inputstream和outputstream实现文件内容的拷贝，

package cn.ysc.cn;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * 文件拷贝
 * 1.创建源
 * 2.选择流
 * 3，操作
 * 4/释放资源
 * @author Administrator
 *
 */
public class TestIO_04_copy {
	public static void main(String[] args) {
		copy("abc.txt", "test.txt");

	}
	public static void copy(String srcPath,String destPath) {
		//1.创建源
		File src =new File(srcPath);//源头
		File test=new File(destPath);//源尾
		//选择流
		InputStream is1=null;
		OutputStream os1=null;
		try {
			is1=new FileInputStream(src);
		    os1=new FileOutputStream(test,true);
		    //3操作（分段读写）
		    byte[] flush=new byte[1024];//缓冲容器
		    int len =-1;//接收长度
		    while((len=is1.read(flush))!=-1) {
		    	os1.write(flush,0,len);
		    }
		    os1.flush();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally {
				try {
					if (null!=os1) {
						os1.close();
					}
				} catch (Exception e2) {
					// TODO: handle exception
					e2.printStackTrace();
				}
				try {
					if (null!=is1) {
						is1.close();
					}
				} catch (Exception e2) {
					// TODO: handle exception
					e2.printStackTrace();
				}
			}
		
}
}