java写文件中并发和乱码问题解决

文件最后一行加文字

public static void writeOneLine(String append,String category,String fileName){
FileChannel channel = null;
        FileLock lock = null;
String path=FileOpearte.class.getResource("").toString();//文件相对路径的问题
        path=path.substring(6, path.length()-5)+"data"+"//"+category+"//"+fileName;
        File file=new File(path);
        try {


        if(!file.exists())
{

        file.createNewFile();

}

          RandomAccessFile rf=new RandomAccessFile(path,"rw");

          channel = rf.getChannel();
          //文件进程锁，当文件锁不可用时，当前进程会被挂起
          //无参lock()默认为独占锁，不会报NonReadableChannelException异常，因为独占就是为了写
          lock = channel.lock();


          //将指针移动到文件末尾
          rf.seek(rf.length());
          //设置编码
          append = new String(append.getBytes("utf-8"),"ISO8859_1");
          rf.writeBytes(append+"\r\n"); //字符串末尾需要换行符
          //释放锁
          lock.release();
          lock = null;
          channel.close();
              channel = null;
          rf.close();//关闭文件流
         }catch (IOException e){
             e.printStackTrace();
         }finally {
             if (lock != null) {
                 try {
                     lock.release();
                     lock = null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }

             if (channel != null) {
                 try {
                     channel.close();
                     channel = null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }

         }
}