Java通过BufferedWriter追加内容到文件末尾的几种常用方法

Java代码



import java.io.BufferedWriter;

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.io.RandomAccessFile;

public class WriteStreamAppend {

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 {

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

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

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

FileWriter writer = new FileWriter(fileName, true);

writer.write(content);

writer.close();

} catch (IOException e) {

e.printStackTrace();

}

}

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

try {

// 打开一个随机访问文件流，按读写方式

RandomAccessFile 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);

randomFile.close();

} catch (IOException e) {

e.printStackTrace();

}

}

public static void main(String[] args) {

System.out.println("start");

method1("c:/test.txt", "追加到文件的末尾");

System.out.println("end");

}