import java.io.BufferedWriter;

import java.io.File;

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.io.RandomAccessFile;

/**

 *

 * @author malik

 * @version 2011-3-10 下午10:49:41

 */

public class AppendFile {

    public static void method1(String file, String conent) {

        BufferedWriter out = null;

        try {

            out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true)));

            out.write(conent);

        } catch (Exception e) {

            e.printStackTrace();

        } finally {

            try {

                if(out != null){

                    out.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }   

    /**

     * 追加文件：使用FileWriter

     *

     * @param fileName

     * @param content

     */

    public static void method2(String fileName, String content) {

        FileWriter writer = null;

        try {

            // 打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件

            writer = new FileWriter(fileName, true);

            writer.write(content);

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            try {

                if(writer != null){

                    writer.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }   

    /**

     * 追加文件：使用RandomAccessFile

     *

     * @param fileName 文件名

     * @param content 追加的内容

     */

    public static void method3(String fileName, String content) {

        RandomAccessFile randomFile = null;

        try {

            // 打开一个随机访问文件流，按读写方式

            randomFile = new RandomAccessFile(fileName, "rw");

            // 文件长度，字节数

            long fileLength = randomFile.length();

            // 将写文件指针移到文件尾。

            randomFile.seek(fileLength);

            randomFile.writeBytes(content);

        } catch (IOException e) {

            e.printStackTrace();

        } finally{

            if(randomFile != null){

                try {

                    randomFile.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }  

    public static void main(String[] args) {

        try{

            File file = new File("d://text.txt");

            if(file.createNewFile()){

                System.out.println("Create file successed");

            }

            method1("d://text.txt", "123");

            method2("d://text.txt", "123");

            method3("d://text.txt", "123");

        }catch(Exception e){

            System.out.println(e);

        }

    }

}