java 文件读写操作

	public String fileReader(String dataDirPath){
		FileReader fr = null;
		LineNumberReader lnr = null;
		String result = "";
		try {
			if(dataDirPath!=null&&!"".equals(dataDirPath)){
				File dataFile = new File(dataDirPath);
				if(dataFile.exists()){
					fr = new FileReader(dataFile);
					lnr = new LineNumberReader(fr);
					String line = null;
					//重复读取信息
					while((line = lnr.readLine())!=null){
						String[] value = line.split("     ");
						result = result+value[0];
					}
					lnr.close();
					fr.close();
				}
			}
		} catch (Exception e) {
		}
		return result;
	}	public String fileReader(String dataDirPath){