public class CopyFolderTest2 {

public static void main(String[] args) throws IOException {

// 封装目录

File file = new File("d:\\java");

File file2 = new File("d:\\jad");

// 获取满足条件的文件名称

String[] strArray = file.list(new FilenameFilter() {

@Override

public boolean accept(File dir, String name) {

return new File(dir, name).isFile() && name.endsWith(".java");

}

});

// 遍历

for (String str : strArray) {

// 数据源

File src = new File(file, str);

// 修改后的文件

String newName = str.replace(".java", ".jad");

File dest = new File(file2, newName);

// 复制文件

// File file =new File("c:\\a.txt");

// c:\\a.txt 效果一样

BufferedReader br = new BufferedReader(new FileReader(src));

BufferedWriter bw = new BufferedWriter(new FileWriter(dest));

// 读写数据

String line= null;

while((line=br.readLine())!=null){

bw.write(line);

bw.newLine();

bw.flush();

}

bw.close();

br.close();

}

}

}