Java将String转换为date，然后转换为Compare [英] Java convert String to date and then Comparison

问题描述

我有一个2D字符串数组

  static String [] [] TaskStorage = {
 ，02/07/13}，
 {任务2，02/08/13}，
 {任务3，02/09/13}，
 {任务4，02/10/13}，
 {任务5，02/11/13}，
 {任务6 03/13}，
 {Task 7，02/04/13}，
 {Task 8，02/05/13}，
 {任务9，02/06/13}，
 {任务10，03/01/13}，
 {任务11，03/02/13} ，
 {Task 12，03/03/13}，
}; 
 



我想打印所有TaskStorage [0] [i]其中TaskStorage [i] [1]是02/07和02/08。
考虑到今天是02/04。今天的日期可以更改为02/28。
todayDate将基于代码的执行时间。

基本上是两天前的打印任务。

这是我尝试过：

  SimpleDateFormat dateFormat = new SimpleDateFormat（mm / dd / yy）; 
 TaskDate = dateFormat.parse（LinkStorage [i] [1]）; 
 if（todayDate.after（TaskDate））{
 System.out.println（）; 
} 
  

解决方案

SimpleDateFormat 将字符串解析为 Date 对象，然后通过 Date API进行比较。

修改问题：

以下是我试过的。

  SimpleDateFormat dateFormat = new SimpleDateFormat（mm / dd / yy）; 
 TaskDate = dateFormat.parse（LinkStorage [i] [1]）; 
 if（todayDate.after（TaskDate））{
 System.out.println（）
} 
  

问题是你的格式字符串，你问分钟，而不是月。更改mm / dd / yy到MM / dd / yy，你应该有更好的运气。 / p>

I have a 2D String array

static String[][] TaskStorage = {
{"Task 1","02/07/13"},  
{"Task 2","02/08/13"},  
{"Task 3","02/09/13"},  
{"Task 4","02/10/13"},  
{"Task 5","02/11/13"},  
{"Task 6","02/03/13"},  
{"Task 7","02/04/13"},  
{"Task 8","02/05/13"},  
{"Task 9","02/06/13"},  
{"Task 10","03/01/13"}, 
{"Task 11","03/02/13"}, 
{"Task 12","03/03/13"}, 
};

I would like to print all TaskStorage[0][i] where TaskStorage[i][1] is 02/07 and 02/08. Taking into consideration that todayDate is 02/04. Today date can change to 02/28. todayDate will be based on the execution time of the code.
Basically printing tasks that are two days ahead.

This is what I've tried:

SimpleDateFormat dateFormat = new SimpleDateFormat("mm/dd/yy");
TaskDate = dateFormat.parse(LinkStorage[i][1]);
if (todayDate.after(TaskDate)) {
    System.out.println("");
}

解决方案

One approach would be to use SimpleDateFormat to parse the strings to Date objects and then do the comparisons through the Date API.

Edit for change to Question:

Below is what I have tried.

SimpleDateFormat dateFormat = new SimpleDateFormat("mm/dd/yy");  
TaskDate = dateFormat.parse(LinkStorage[i][1]);  
if (todayDate.after(TaskDate)) {  
    System.out.println("")  
}  

Unfortunately not getting desired output

The problem is with your format string, you are asking for Minutes and not Months. Change "mm/dd/yy" to "MM/dd/yy" and you should have better luck.

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