把内容写入指定目录指定文件的java文件工具类,支持日期格式目录名的生成

package com.yanek.test;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;

public class FileUtil {
	
	private static SimpleDateFormat sdfYmd = new SimpleDateFormat("yyyy-MM-dd");

	/**
	 * @param args
	 * 
	 */
	public static void main(String[] args) {

	
		writeContentToLocalFile("/temp/test/","test1.txt","test\r\n","UTF-8");
		writeContentToLocalFile("/temp/test/","test1.txt","test\r\n","UTF-8");
		
		String currentDate = sdfYmd.format(System.currentTimeMillis());
		
		String basePath="/temp";
		String fullpath=basePath+getDirname(currentDate);
		
		writeContentToLocalFile(fullpath,"test1.txt","test111\r\n","UTF-8");

	}
	
	/**
	 * 
	 * @param dirname  目录名
	 * @param localfilename 文件名
	 * @param content 文件内容
	 * @param charset 编码
	 */
	public static void writeContentToLocalFile(String dirname,String localfilename,String content,String charset){
			
			File f=new File(dirname);
			if (!f.exists())
			{
					f.mkdirs();
			}
			String localFilename = dirname+File.separator+localfilename;

			FileOutputStream fos;
			try {
				fos = new FileOutputStream(localFilename,true);
				
				
				try {
					OutputStreamWriter writer = new OutputStreamWriter(fos, charset);
					
					try {
						writer.write(content);

					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					
					try {
						writer.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					try {
						fos.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					
				} catch (UnsupportedEncodingException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} //覆盖原来的文件 追加到后面

			
		}
		
	
	/**
	 * 根据日期字符串得到目录名 格式: /2008/10/15/
	 * @param datatime
	 * @return
	 */
	public static String getDirname(String datatime)
	{
		String nian=datatime.substring(0,4);
		String yue=datatime.substring(5,7);
		String ri=datatime.substring(8,10);
        return "/"+nian+"/"+yue+"/"+ri+"/";
	}
	

}