从FTPClient.getModificationTime（）解析日期字符串 [英] parsing a date string from FTPClient.getModificationTime()

问题描述

我正在尝试解析日期字符串，这是FTP服务器上文件的修改日期。以下是代码。

I am trying to parse a date string which is a modification date of a file on FTP server. Following is the code.

String dateString = mFTPClient.getModificationTime(PDF_FILE_NAME_PS);

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");

Date modificationDate = dateFormat.parse(dateString.substring(dateString.indexOf(" ")));

Log.v(TAG, "inside downloadservice dateString="+dateString);

Log.v(TAG, "inside downloadservice modificationdate="+modificationDate.toString());

我在日志中得到这个

05-27 10:04:20.870: V/DownloadService(751): inside downloadservice dateString=213 20130523130035

05-27 10:04:20.890: V/DownloadService(751): inside downloadservice modificationdate=Sat Jul 23 07:30:35 AEDT 203

任何人都可以请帮我这个？

Can anyone please help me with this?

推荐答案

String #substring（int index）方法说：
子字符串以指定索引处的字符开头，并延伸到此字符串的末尾。

The javadoc for the String#substring(int index) method says: The substring begins with the character at the specified index and extends to the end of this string.

这就是问题所在有：您没有正确使用 String.substring（）方法，因为在调用它时，您会收到另一个 String ，包含一个空格作为第一个字符，这就是解析器的作用istake。

And here is the problem you have: You're not using correctly the String.substring() method, because when invoking it, you receive another String, which contains a space as a first character, which is why the parser does a mistake.

以下是您需要的修复：

String dateString = mFTPClient.getModificationTime(PDF_FILE_NAME_PS);
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
Date modificationDate = 
     dateFormat.parse(dateString.substring(dateString.indexOf(" ") + 1));

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