java - 无法解析的日期 : when convert date from dd MMM yyyy format to dd/MM/yyyy

Question

当我运行下面的代码时，出现无法解析的错误。如何将 dd MMM yyyy 格式转换为 dd/MM/yyyy 格式？

public Calendar myMethod(){
   String dateStr = "16 Dec 2014"
   SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
   Date thedate = formatter.parse(dateStr);

   Calendar cal = Calendar.getInstance();
   cal.setTime(thedate);
   return cal;
}

Answer 1

假设您修复了明显的语法错误，那么:

String dateStr = "16 Dec 2014"                // <== This date is in dd MMM yyyy
formatter = new SimpleDateFormat(dd/MM/yyyy); // <== This SDF is in dd/MM/yyyy
Date thedate = formatter.parse(dateStr);      // <== So how can it be expected to parse?

您要做的就是为您需要解析的格式创建一个解析器，并为您想要的格式创建一个格式化程序:

String dateStr = "16 Dec 2014";
SimpleDateFormat parser = new SimpleDateFormat("dd MMM yyyy");
Date thedate = parser.parse(dateStr);
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
String dateStrReformatted = formatter.format(thedate);