我试图在两个日期范围之间打印出日志条目,但这样做有些麻烦。
我已经阅读了文件中的条目并存储了我想要的信息作为日期变量,但我仍然可以弄清楚为什么它不会显示范围内的日期
这是文件
2012-09-13 16:04:22 DEBUG SID:34523 BID:1329 RID:65d33 'Starting new session'
2012-09-13 16:04:30 DEBUG SID:34523 BID:1329 RID:54f22 'Authenticating User'
2012-09-13 16:05:30 DEBUG SID:42111 BID:319 RID:65a23 'Starting new session'
2012-09-13 16:04:50 ERROR SID:34523 BID:1329 RID:54ff3 'Missing Authentication token'
2012-09-13 16:05:31 DEBUG SID:42111 BID:319 RID:86472 'Authenticating User'
2012-09-13 16:05:31 DEBUG SID:42111 BID:319 RID:7a323 'Deleting asset with ID 543234'
2012-09-13 16:05:32 WARN SID:42111 BID:319 RID:7a323 'Invalid asset ID'
2012-09-14 16:04:22 DEBUG SID:34523 BID:1329 RID:65d33 'Starting new session'
2012-09-14 16:04:30 DEBUG SID:34523 BID:1329 RID:54f22 'Authenticating User'
2012-09-14 16:05:30 DEBUG SID:42111 BID:319 RID:65a23 'Starting new session'
2012-09-14 16:04:50 ERROR SID:34523 BID:1329 RID:54ff3 'Missing Authentication token'
2012-09-14 16:05:31 DEBUG SID:42111 BID:319 RID:86472 'Authenticating User'
2012-09-14 16:05:31 DEBUG SID:42111 BID:319 RID:7a323 'Deleting asset with ID 543234'
2012-09-14 16:05:32 WARN SID:42111 BID:319 RID:7a323 'Invalid asset ID'
这是我的代码
import java.io.File;
import java.io.FileNotFoundException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Locale;
import java.util.Scanner;
public class ReadLogs {
private static String line, logLevel = "16:05:31", businessID ="1329", sessionID ="34523",
startDateStr = "2012-09-10",endDateStr ="2012-09-14" ;
private static String logString ="";
private static ArrayList<String> logList = new ArrayList<>();
public static void main(String args[]){
readFile();
returnLogLinesByLevel();
returnLogLinesByBusiness();
returnLogLinesBySessionID();
returnLogLinesByDate();
}//close main
/*
* This method checks the logs for entries between a date range.
* @param String dateToValidate - This is the date to search the logs for
* @param String startDate - This is the starting date point
* @param String endDate - This is the end date point
* */
private static void returnLogLinesByDate() {
System.out.println("///////By Date/////////////////");
for( int i = 0; i <= logList.size() - 1; i++)
{
logString = logList.get(i);
if(isThisDateWithinRange(logString.substring(0, 11))){
System.out.println(logString);
}
}
System.out.println("/////////////////////////////////");
}
/*
* This method checks the logs for entries by the Session ID
* @param String sessionID - this is the session ID to search for
* */
private static void returnLogLinesBySessionID() {
System.out.println("///////By Session ID//////////////");
checkLogs(sessionID);
System.out.println("//////////////////////////////////");
}
/*
* This method checks the logs for entries by the business ID
* @param String businessID - this is the business ID to search for
* */
private static void returnLogLinesByBusiness() {
System.out.println("///////By Business ID/////////////");
checkLogs(businessID);
System.out.println("//////////////////////////////////");
}
/*
* This method checks the logs for entries by the log level
* @param String logLevel - this is the log level to search for
* */
private static void returnLogLinesByLevel() {
System.out.println("///////By Level/////////////");
checkLogs(logLevel);
System.out.println("////////////////////////////");
}
/*
* This method checks if the logs contain a string of characters
* @param String logContentToSearchFor - The String to search logs for
* */
private static void checkLogs(String logContentToSearchFor){
for( int i = 0; i <= logList.size() - 1; i++)
{
logString = logList.get(i);
if(logString.contains(logContentToSearchFor)){System.out.println(logString);}
}
}
/*
* This method checks whether the 'dateToValidate' is inside the specified start/end dates
* and returns true/false based on the outcome
* */
public static boolean isThisDateWithinRange(String string){
try
{
Date date = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH).parse(string);
Date startDate = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH).parse(startDateStr);
Date endDate = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH).parse(endDateStr);
if(date.after(startDate) && date.before(endDate)){
return true;
} else{
return false;
}
}catch(ParseException e) {e.printStackTrace();
return false;
}
}
private static void readFile() {
/*Read log file*/
Scanner logScanner = null;
try {
logScanner = new Scanner(new File("C:\\Users\\"+System.getProperty("user.name")+"\\Desktop\\logs.txt"));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
while (logScanner.hasNextLine()) {
line = logScanner.nextLine();
logList.add(line);
}
}
}
答案 0 :(得分:0)
检查范围的条件不正确,应该是:
if(date.after(startDate) && date.before(endDate)){
// valid date
}
如果日期小于startDate或者大于endDate,那么您之前的条件将返回true,这与您想要的相反。
答案 1 :(得分:0)
在您的方法isThisDateWithinRange()
中,您要检查的是两个日期之间的日期,使用从未更改的变量dateToValidate
(对于每个方法调用,它具有值“2012-09-13”)。您应该更改方法签名并传递要检查的参数日期在范围内。它应该是这样的:
public static boolean isThisDateWithinRange(String strDate){
// ....
Date date = sdf.parse(strDate);
// ...
}
正如@Kakarot回答的那样,你应该使用:
if(date.after(startDate) && date.before(endDate)){
// valid date
}
如果您使用逻辑OR(||
),则日期总是在结束日期之前的开始日期OR
之后,并且在该情况下,isThisDateWithinRange
将始终返回true。
答案 2 :(得分:0)
我将验证日期作为两个日期之间的日期进行验证,因此它始终返回true,因此打印出每个日志条目。我需要做的是传递当前日志条目的日期。
if(isThisDateWithinRange(logString.substring(0, 11)))