자바 txt 텍스트 내용 읽 기 도구 클래스

package com.baojian.mob.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import org.apache.commons.lang.StringUtils;

/**
 * 
 *   ：      

 *   ： tt

 *   ：2017 8 10 

 *   ：1.0

 *
 */
public class ReadTxtUtil {
	
	public static StringBuilder readTxtFile(String filePath) throws IOException {
		if (StringUtils.isBlank(filePath)) {
			return null;
		}
		String encoding = "GBK";
		File file = new File(filePath);
		//         
		if (file.isFile() && file.exists() && file.canRead()) {
			StringBuilder result = new StringBuilder();
			FileInputStream fiStream = new FileInputStream(file);
			InputStreamReader inputStreamReader = new InputStreamReader(fiStream, encoding);
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
			String text = null;
			while ((text = bufferedReader.readLine()) != null) {//   readLine  ，     
				result.append(text + System.lineSeparator());
			}
			bufferedReader.close();
			inputStreamReader.close();
			fiStream.close();
			return result;
		}
		return null;
	}

     public static String readTxtFile(String filePath) { //    txt  ，  io   
	String content = null;
	try (Reader reader = new InputStreamReader(new FileInputStream(filePath), "GBK")) {
		StringBuffer sb = new StringBuffer();
		char[] tempchars = new char[1024];
		while (reader.read(tempchars) != -1) {
			sb.append(tempchars);
		}
		content = sb.toString();
	} catch (UnsupportedEncodingException e) {
		e.printStackTrace();
	} catch (FileNotFoundException e) {
		e.printStackTrace();
	} catch (IOException e) {
		e.printStackTrace();
	}
	return content;
      }