问题出得很随机 - 黑马程序员技术交流社区

/**
* ClassName:CopyFileDemo2 <br/>
* Function: 遍历D盘目录下，所有的文件夹，找到.java文件，统一复制到D:盘test目录。
* Reason: 注意查看输出结果
* Date: 2015-1-12 下午1:05:31 <br/>
* @author Bowen
* @version
* @since JDK 1.6
* @see
*/
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
public class CopyFileDemo2 {
public static void main(String[] args) throws IOException {
File srcForder = new File("d:\\");
File destForder = new File("d:\\Test\\");
isFile(srcForder, destForder);
}
private static void isFile(File srcForder, File destForder) throws IOException {
if (!destForder.exists())
destForder.mkdir();
File[] file = srcForder.listFiles();
if (file != null) {
for (File srcFile : file) {
if (srcFile.isDirectory()) {
isFile(srcFile, destForder);
} else {
if (srcFile.getName().endsWith(".java")) {
File destFile = new File (destForder,srcFile.getName()) ;
copyFile(srcFile, destFile);
}
}
}
}
}
private static void copyFile(File srcFile, File destFile) throws IOException {
BufferedReader br = new BufferedReader(new FileReader(srcFile));
BufferedWriter bw = //new BufferedWriter(new FileWriter(destFile)) ;
new BufferedWriter(new OutputStreamWriter(new FileOutputStream(destFile, true), "UTF-8"));
String line = null ;
while ( (line = br.readLine())!= null) {
if( !line.isEmpty()){
System.out.println( br.readLine());
bw.write(line);
bw.newLine();
bw.flush();
}
}
br.close();
bw.close();
}
}

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