?? logtool.java
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package cn.ac.cintcm.spider.cnki;
import java.io.PrintWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.File;
import java.util.Calendar;
import java.util.Date;
/**
* 記錄log日志文件的工具類
*/
public class LogTool {
private PrintWriter logPrint;
private String logFile = "";
private String logName = "";
/**
* 配置沒有頭的log
*/
public LogTool(){
checkDate();
}
/**
* 配置log文件名的頭
*/
public LogTool(String logName){
this.logName = logName;
checkDate();
}
/**
* 得到log文件名
*/
private String getLogFile(){
String date = "";
Calendar cd = Calendar.getInstance();
int y = cd.get(Calendar.YEAR);
int m = cd.get(Calendar.MONTH) + 1;
int d = cd.get(Calendar.DAY_OF_MONTH);
date = "./log/" + logName + y + "-";
if(m < 10)
date += 0;
date += m + "-";
if(d < 10)
date += 0;
date += d + ".log";
return date;
}
/**
* 配置log屬性,如果沒有新建log文件
*/
private void newLog(){
logFile = getLogFile();
try{
logPrint = new PrintWriter(new FileWriter(logFile, true), true);
}catch(IOException e){
(new File("./log")).mkdir();
try{
logPrint = new PrintWriter(new FileWriter(logFile, true), true);
}catch(IOException ex){
System.err.println("無法打開日志文件:" + logFile);
logPrint = new PrintWriter(System.err);
}
}
}
/**
* 檢查日期如果改變新建log文件
*/
private void checkDate(){
if(logFile == null || logFile.trim().equals("") || !logFile.equals(getLogFile())){
newLog();
}
}
/**
* 將文本信息寫入日志文件,缺省為userdir/log
*/
public void log(String msg) {
checkDate();
logPrint.println(new Date() + ": " + msg);
}
/**
* 將文本信息與異常寫入日志文件
*/
public void log(Throwable e, String msg) {
checkDate();
logPrint.println(new Date() + ": " + msg);
e.printStackTrace(logPrint);
}
public void logs(Throwable e, String msg) {
logPrint.println(new Date() + ": " + msg);
e.printStackTrace(logPrint);
}
}
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