자바 추가 파일

package com.readfile;

import java.io.FileWriter;
import java.io.IOException;
import java.io.RandomAccessFile;

public class AppendToFile {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String fileName = "C:/Users/Administrator/Desktop/Noname1.txt";
        String content = "new append!";
        //   A    
        AppendToFile.appendMethodA(fileName, content);
        AppendToFile.appendMethodA(fileName, "append end. 
");
        //      
        ReadFromFile.readFileByLines(fileName);
        //   B    
        AppendToFile.appendMethodB(fileName, content);
        AppendToFile.appendMethodB(fileName, "append end. 
");
        //      
        ReadFromFile.readFileByLines(fileName);
	}
	/**
     * A      ：  RandomAccessFile
     */
    public static void appendMethodA(String fileName, String content) {
        try {
            //            ，     
            RandomAccessFile randomFile = new RandomAccessFile(fileName, "rw");
            //     ，   
            long fileLength = randomFile.length();
            //           。
            randomFile.seek(fileLength);
            randomFile.writeBytes(content);
            randomFile.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * B      ：  FileWriter
     */
    public static void appendMethodB(String fileName, String content) {
        try {
            //        ，           true          
            FileWriter writer = new FileWriter(fileName, true);
            writer.write(content);
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}