Java实现拷贝文件

• 拷贝文件

public class CopyFile {
    public static void main(String[] args) throws IOException {
        String sourceFile = "D:/1.txt";
        String targetFile = "D:/2.txt";
        copyFile(sourceFile, targetFile);
    }
    public static void copyFile(String sourceFile, String targetFile) throws IOException {
        FileInputStream fileInputStream = null;
        FileOutputStream fileOutputStream = null;
        try {
            fileInputStream = new FileInputStream(sourceFile);
            fileOutputStream = new FileOutputStream(targetFile);
            byte data[] = new byte[1024 * 4];
            int len = 0;
            while ((len = fileInputStream.read(data)) != -1) {
                fileOutputStream.write(data, 0, len);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            fileInputStream.close();
            fileOutputStream.close();
        }
    }

}

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