Java追加文件内容的三种方法

import <a href="http://lib.csdn.net/base/17" class='replace_word' title="Java EE知识库" target='_blank' style='color:#df3434; font-weight:bold;'>Java</a>.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);

}

}

}