WriteFile.java

package com.jqyd.android.module.lbs.util;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;


import android.os.Environment;

public class WriteFile {
	public static String logStr = "DSDW";
	private String fileName;
	
	private static String currDay = null;
	

	public WriteFile(String fileName) {
		this.fileName = fileName;
		currDay = JqydDateUtil.getDateDayOne(new Date());
	}

	/**
	 * 写入日志
	 * @param content
	 * @return
	 */
	public boolean writeToFile(String content)  {
		boolean flag = true;
		content = JqydDateUtil.getDateSecOne(new Date())+"\t"+content+"\n";
		File dirfile = new File(Environment.getExternalStorageDirectory()
				.getPath() + "/" + logStr+ File.separator + "lxsb_recordLog");
		if (!dirfile.exists()) {
			System.out.println("创建文件夹"+dirfile.mkdirs());
		}
		File file = new File(Environment.getExternalStorageDirectory()
				.getPath() + "/" + logStr+ File.separator + "lxsb_recordLog" + "/" + fileName + ".txt");
		try {
			FileOutputStream fos = new FileOutputStream(file, true);
			byte[] ba = content.getBytes("utf-8");
			content = new String(ba);
			fos.write(content.getBytes());
			fos.flush();
			fos.close();

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return flag;
	}
	
	/**
	 * 删除文件
	 */
	public void deleteFile(){
		ArrayList<File> delFileName = new ArrayList<File>();
		try {
			File recorDirfile = new File(Environment.getExternalStorageDirectory()
					.getPath() + "/" + logStr+ File.separator + "lxsb_recordLog");
			File errDirfile = new File(Environment.getExternalStorageDirectory()
					.getPath() + "/" + logStr+ File.separator + "lxsb_errLog");
			File errfile = new File(Environment.getExternalStorageDirectory()
					.getPath() + "/" + logStr);
			
			File file = null;
			File recordFileArr[] = recorDirfile.listFiles();
			int df = 0;
			for(int i=0;i<recordFileArr.length;i++){
				file = recordFileArr[i];
				String fileDate = JqydDateUtil.getDateDayOne(new Date(file.lastModified()));
				System.out.println("文件名："+file.getName());
				System.out.println("转换后的日期："+fileDate);
				//判断文件和制定日期的关系，删除最近的七天之外的数据
				long day = getQuot(fileDate,currDay);
				if(day>=7){
					df++;				
					delFileName.add(file);
				}
			}
			System.out.println("删除的记录日志数："+df);
			String log = "操作日期："+JqydDateUtil.getDateSecTwo(new Date())+"---删除的日志记录数："+df;
			
			
			//错误日志
			File errFileArr[] = errDirfile.listFiles();
			df = 0;
			for(int i=0;i<errFileArr.length;i++){
				file = errFileArr[i];
				String fileDate = JqydDateUtil.getDateSecTwo(new Date(file.lastModified()));
				System.out.println("错误日志文件名："+file.getName());
				System.out.println("错误日志转换后的日期："+fileDate);
				//判断文件和制定日期的关系，删除最近的七天之外的数据
				long day = getQuot(fileDate,currDay);
				if(day>=7){
					df++;				
					delFileName.add(file);
				}
			}
			System.out.println("需要删除的错误日志数："+df);
			
			///系统异常日志
			File errorFileArr[] = errfile.listFiles();
			df = 0;
			for(int i=0;i<errorFileArr.length;i++){
				file = errorFileArr[i];
				String fileDate = JqydDateUtil.getDateSecTwo(new Date(file.lastModified()));
				System.out.println("错误日志文件名："+file.getName());
				System.out.println("错误日志转换后的日期："+fileDate);
				//判断文件和制定日期的关系，删除最近的七天之外的数据
				long day = getQuot(fileDate,currDay);
				if(day>=7){
					df++;				
					delFileName.add(file);
				}
			}
			System.out.println("需要删除的错误日志数："+df);
			
			
			
			//执行删除操作
			int del = 0;
			for(File f : delFileName){
				del++;
				boolean dres = f.delete();
				System.out.println("第"+del+"个文件，删除结果："+dres);
			}
			log += ",删除的错误日志记录数："+del;
			writeToFile(log);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			writeToFile("没有SD卡，无法获取或写入日志");
		}
	}
	
	/**
	 * 计算相差天数
	 * @param time1
	 * @param time2
	 * @return
	 */
	public long getQuot(String time1, String time2){
		  long quot = 0;
		  SimpleDateFormat ft = new SimpleDateFormat("yyyy-MM-dd");
		  try {
		   Date date1 = ft.parse(time1);
		   Date date2 = ft.parse(time2);
		   quot = date2.getTime() - date1.getTime();
		   quot = quot / 1000 / 60 / 60 / 24;
		  } catch (ParseException e) {
		   e.printStackTrace();
		  }
		  return quot;
		 }	
}