用下面的代码效果最好,亲测!!!
FileInputStream fis = new FileInputStream(srcFile);
InputStreamReader isr = new InputStreamReader(fis, "UTF-8");
BufferedReader br = new BufferedReader(isr);
String line = null,FileContent="";
while ((line = br.readLine()) != null) {
FileContent += line;
FileContent += "\r\n"; // 补上换行符
}
FileOutputStream fos = new FileOutputStream(toFile);
OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
osw.write(FileContent);
osw.flush();