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
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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