Java读写文件Demo

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Java按行读取文件和写文件Demo
package com.basic;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;/** * 文件读写有以下几种常用的方法</br> * 1、字节读写（InputStream/OutputStream）</br> * int tmp = inputstream.read() != -1</br> * 2、字符读取（FileReader/FileWriter）</br> * int tmp = filereader.read() != -1 //换行需要特殊处理</br> * 3、行读取（BufferedReader/BufferedWriter）</br> * String tmp = bufferedreader.readLine()</br> * * @author chichudxing * @date 2015年7月28日 下午2:21:19 */public class FileReadWriteDemo {/** * 从文件fileNme中读取数据 * * @param fileNme *            文件名 * @return 读取的结果 */public static String Read(String fileNme) {StringBuilder sb = new StringBuilder(4096);BufferedReader in = null;try {in = new BufferedReader(new InputStreamReader(new FileInputStream(fileNme), "UTF-8"));String linetmp = null;while ((linetmp = in.readLine()) != null) {sb.append(linetmp + "\n");}} catch (Exception e) {e.printStackTrace();} finally {if (null != in) {try {in.close();} catch (IOException e) {e.printStackTrace();}}}return sb.toString();}/** * 将数据写入文件. * * @param fileName *            文件名 * @param data *            要写的数据. */public static void Write(String fileName, String data) {PrintWriter out = null;boolean append = false;try {out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(fileName, append), "UTF-8"));out.println(data);out.flush();} catch (IOException e) {e.printStackTrace();} finally {out.close();}}public static void main(String[] args) {String readData = Read("conf/重生之妖孽人生.txt");Write("./io/BufferedReaderDemoWrite.java", readData);}}
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