拷贝文件(java)

srcPath(源地址)    desPath(目标地址)

1、普通拷贝（地址的形式）

public static void testOnCopyFile(String srcPath,String desPath){

File srcFile = new File(srcPath);

File desFile = new File(desPath);

try {

InputStream is = new FileInputStream(srcFile);

OutputStream os = new FileOutputStream(desFile);

byte[] data = new byte[1024];

int len = 0;

while((len = is.read(data))!= -1){

os.write(data, 0, len);

}

os.flush();

os.close();

is.close();

} catch (Exception e) {

System.out.println("读取失败");

}

}

2、以文件形式拷贝

//通过文件形式拷贝

public static void testOnCopyFile(File src,File des) throws IOException{

                if(! src.isFile()){

                                System.out.println("只能上传文件");

                                throw new IOException("只能上传文件");

                }

                //如果目标文件是一个已经存在的文件夹

                if(des.isDirectory()){

                                System.out.println("只能拷贝文件");

                                throw new IOException("不能建立同名的文件夹");

                }

                try {

                                InputStream is = new FileInputStream(src);

                                OutputStream os = new FileOutputStream(des);

                                byte[] data = new byte[1024];

                                int len = 0;

                                while((len = is.read(data))!= -1){

                                                os.write(data, 0, len);

                                    }

                                os.flush();

                                os.close();

                                is.close();

                } catch (Exception e) {

                    System.out.println("读取失败");

            }

}

3、测试文件

@Test

public void test1(){

                String srcPath = "D:/KFO/parent/1122.txt";

                String desPath = "D:/KFO/parent/test1/2233445566.txt";

                testOnCopyFile(srcPath, desPath);

}

@Test

public void test2() throws IOException{

                File srcFile = new File("D:/KFO/parent/1122.txt");

                File desFile = new File("D:/KFO/parent/test1/22334455.txt");

                testOnCopyFile(srcFile, desFile);

}