Java×·¼ÓÎļþ

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.io.OutputStreamWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.lang.*;
/******************************
* дÎı¾
* java.lang.Object
|-java.io.Writer
|-java.io.OutputStreamWriter
|-java.io.FileWriter
* java.lang.Object
|-java.io.Writer
|-java.io.BufferedWriter
* д¶þ½øÖÆ
* java.lang.Object
|-java.io.OutputStream
|-java.io.FileOutputStream
*******************************/
/**
* ½«ÄÚÈÝ×·¼Óµ½Îļþβ²¿
*/
public class AppendToFile {
/**
* A·½·¨×·¼ÓÎļþ£ºÊ¹ÓÃRandomAccessFile
* @param fileName ÎļþÃû
* @param content ×·¼ÓµÄÄÚÈÝ
* note:ÊÊÓÃÓÚ¶þ½øÖÆÎļþ£¬²»Ö§³ÖÖÐÎÄ×Ö·û
*/
public static void appendMethodBytes(String fileName,String content){
try {
// ´ò¿ªÒ»¸öËæ»ú·ÃÎÊÎļþÁ÷£¬°´¶Áд·½Ê½
RandomAccessFile randomFile = new RandomAccessFile(fileName, "rw");
// Îļþ³¤¶È£¬×Ö½ÚÊý
long fileLength = randomFile.length();
//½«Ð´ÎļþÖ¸ÕëÒƵ½Îļþβ¡£
randomFile.seek(fileLength);
randomFile.writeBytes(content);
randomFile.close();
} catch (IOException e){
e.printStackTrace();
}
}
/**
* B·½·¨×·¼ÓÎļþ£ºÊ¹ÓÃFileWriter
* @param fileName
* @param content
* note:ÊÊÓÃÓÚÎı¾Îļþ
*/
public static void appendMethodChrs(String fileName, String content){
try {
//´ò¿ªÒ»¸öдÎļþÆ÷£¬¹¹Ô캯ÊýÖеĵڶþ¸ö²ÎÊýtrue±íʾÒÔ×·¼ÓÐÎʽдÎļþ
FileWriter writer = new FileWriter(fileName, true);
writer.write(content);
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* °´Ö¸¶¨charset×·¼ÓÎı¾Îļþ£¬Ê¹ÓÃBufferedWriter
* @param fileName
* @param content
* @param charset
*/
public static void appendMethodCharset(String fileName,String content,String charset)
{
try {
//FileOutputStream¹¹Ô캯ÊýÖеĵڶþ¸ö²ÎÊýtrue±íʾÒÔ×·¼ÓÐÎʽдÎļþ
Buffered