Java代码
public static void main(String[] args) {
String filename = "F:/zhangming_test/test.txt";
String filename1 = "F:/zhangming_test/test1.txt";
String docfileName = "F:/猪猪猫xp系统.rar";
// String filename = "F:/zhangming_test/test_doc.doc";
// readFile(filename);
// copyFileBychar(filename);
copyFileByByte(docfileName);
System.out.println("ddd");
}
/**
* 该方法只支持读取字符文件并复制文件. 按行读取的 文件锁未考虑
*
* @param filename
*/
public static void copyFileBychar(String filename) {
FileReader fileReader = null;
BufferedWriter bufferedWriter = null;
try {
bufferedWriter = new BufferedWriter(new PrintWriter(new File(
"F:/zhangming_test/test2.txt")));
fileReader = new FileReader(new File(filename));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
BufferedReader bufferedReader = new BufferedReader(fileReader);
String linecontent = null;
try {
// 用readLine方法 移 流的指
while ((linecontent = bufferedReader.readLine()) != null) {
System.out.println(linecontent);
bufferedWriter.write(linecontent);
}
bufferedWriter.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
bufferedReader.close();
bufferedWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 每次读取一定数量byte的文件流. 文件锁未考虑
* @param inputFileName
*/
public static void copyFileByByte(String inputFileName) {
InputStream inputStream = null;
OutputStream outputStream = null;
try {
inputStream = new FileInputStream(new File(inputFileName));
// ==方法一(一次性把文件的所有内容都添加读取到byte中)==
// inputStream.read(bs);
// outputStream = new FileOutputStream(new File(
// "F:/zhangming_test/test6.doc"));
// outputStream.write(bs);
// ==方法二==
outputStream = new FileOutputStream(new File(
"F:/猪猪猫xp系统1.rar"));
byte[] tmpBytes = new byte[1024];
while (inputStream.read(tmpBytes) != -1) {
outputStream.write(tmpBytes, 0, tmpBytes.length);
}
outputStream.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
} finally {
try {
outputStream.close();
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Java代码
public static void copyFileWithNio(String srcFile, String destFile) {
try {
FileChannel srcChannel = new FileInputStream(new File(srcFile))
.getChannel();
FileChannel destChannel = new FileOutputStream(new File(destFile))
.getChannel();