日期校验

import java.text.*;
public class Test{
public   static   java.util.Date   str2date(String   s,   String   pattern){  
                   
                  SimpleDateFormat   df   =   (SimpleDateFormat)DateFormat.getDateInstance();  
   
                   
                  synchronized(df)   {  
                   
                          df.applyPattern(pattern);  
   
                   
                          df.setLenient(false);  
   
                          try   {  
                   
                                  java.util.Date   date   =   df.parse(s);  
   
                                  return   date;  
   
                          }   catch(Exception   e)   {  
                          }  
                  }  
                   
                  return   null;  
          }
         
          public static void main(String [] args){
          System.out.print(Test.str2date("19880111","yyyyMMdd"));
          }
}