17、java追加ファイル内容(書き込み方式)

package com.tij.io.file;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;

/**
 *         
 * @author GYJ
 * @date 2014-3-22
 */
public class AppendFile {

	/**
	 *           ，               
	 * <p>                
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		//       
		String fileName = "/Users/GYJ/java1.txt";
		//     
		String appendData = "this string will be append to last row fileName";
		//    
		addpendUsingOutputStream(fileName, appendData);
		appendUsingBufferedWrite(fileName, appendData, 400);
		appendUsingFileWrite(fileName, appendData);
		//    
		File file = new File(fileName);
		FileInputStream fis = new FileInputStream(file);
		InputStreamReader isr = new InputStreamReader(fis, Charset.defaultCharset());
		BufferedReader br = new BufferedReader(isr);
		String line;
		int i = 0;
		while ((line = br.readLine()) != null) {
			i ++;
			System.out.println(i + "read result = " + line);
		}
		br.close();
	}
	
	/**
	 *      
	 * @param fileNme	        
	 * @param data		        
	 * @throws IOException 
	 */
	private static void addpendUsingOutputStream(String fileName, String data) throws IOException {
		//true:         
		FileOutputStream os = new FileOutputStream(new File(fileName), true);
		os.write(data.getBytes(), 0, data.length());
		os.close();
	}
	
	/**
	 *   BufferedWrite
	 * @param fileName
	 * @param data
	 * @throws IOException 
	 */
	private static void appendUsingBufferedWrite(String fileName, String data, int noOfLines) throws IOException {
		File file = new File(fileName);
		FileWriter fw = null;
		BufferedWriter bw = null;
		//true:        
		fw = new FileWriter(file, true);
		bw = new BufferedWriter(fw);
		//        
		for (int i = 0; i < noOfLines; i++) {
			bw.newLine();
			fw.write(data);
		}
		bw.close();
		fw.close();
	}
	
	/**
	 *   fileWrite
	 * @param fileName
	 * @param data
	 * @throws IOException 
	 */
	private static void appendUsingFileWrite(String fileName, String data) throws IOException {
		File file = new File(fileName);
		FileWriter fw = null;
		//true:        
		fw = new FileWriter(file, true);
		fw.write(data);
		fw.close();
	}

}