logcommon.java

一个简单的图书馆的管理系统,该系统主要是针对学校的图书馆而做的

package librarymanagement.common;

import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
 * 构建公共的写入日志文件类
 * @author 虎兴龙
 *
 */
public class LogCommon {
/**
 * 获得PrintWrite对象
 * @return
 */
public  static PrintWriter getPrintWriteInstance(){
	 Calendar can = Calendar.getInstance();
	 SimpleDateFormat fileformate = new SimpleDateFormat("yyyy'年'MM'月'dd'日'");
	 String fileName = fileformate.format(can.getTime());
	PrintWriter pw =null;
	try {
		      pw = new PrintWriter(
		       new FileWriter("程序运行日志\\" + fileName + "日志.log", true), true);
		    } catch (IOException e2) {
		      e2.printStackTrace();
		    }
		return pw;
}
/**
 * 获得String类型的程序运行时刻
 * @return
 */
public static String getCurrentTime(){
	 Calendar can = Calendar.getInstance();
	 SimpleDateFormat formatter = new SimpleDateFormat(
     "yyyy'年'MM'月'dd'日'HH:mm:ss");
 String currentTime = formatter.format(can.getTime());
 return currentTime;
}
}