格式转换问题date 麻烦大家解释的详细一点，应该怎么改才能没错误 ！

这是错误提示：
HTTP Status 500 - java.lang.IllegalArgumentException: Cannot format given Object as a Date

type Exception report

message java.lang.IllegalArgumentException: Cannot format given Object as a Date

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.IllegalArgumentException: Cannot format given Object as a Date
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
lvjianyu.blog.HomeServlet.doGet(HomeServlet.java:30)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause

java.lang.IllegalArgumentException: Cannot format given Object as a Date
java.text.DateFormat.format(DateFormat.java:281)
java.text.Format.format(Format.java:140)
org.apache.jsp.main_jsp._jspService(main_jsp.java:90)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
lvjianyu.blog.HomeServlet.doGet(HomeServlet.java:30)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

这是错误代码
for(int i=0;i<list.size();i++){
Blog blog=(Blog)list.get(i);

    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
    String date=sdf.format(blog.getCreatedTime());

    sdf=new SimpleDateFormat("HH:mm:ss");
    String time=sdf.format(blog.getCreatedTime());

    应该怎么改？

请参考如下代码：

public class DateDemo05{
    public static void main(String args[]){
        String strDate = "2008-10-19 10:11:30.345" ;
        // 准备第一个模板，从字符串中提取出日期数字
        String pat1 = "yyyy-MM-dd HH:mm:ss.SSS" ;
        // 准备第二个模板，将提取后的日期数字变为指定的格式
        String pat2 = "yyyy年MM月dd日 HH时mm分ss秒SSS毫秒" ;
        SimpleDateFormat sdf1 = new SimpleDateFormat(pat1) ;        // 实例化模板对象
        SimpleDateFormat sdf2 = new SimpleDateFormat(pat2) ;        // 实例化模板对象
        Date d = null ;
        try{
            d = sdf1.parse(strDate) ;   // 将给定的字符串中的日期提取出来
        }catch(Exception e){            // 如果提供的字符串格式有错误，则进行异常处理
            e.printStackTrace() ;       // 打印异常信息
        }
        System.out.println(sdf2.format(d)) ;    // 将日期变为新的格式
    }
};

用两个格式类型变量，分别来操作。然后转换

 String date = given.toString();
        if (StringUtils.isNotBlank(date)) {
            if(date.length() < 11){
                date += " 00:00:00";
            }
            return java.sql.Date.valueOf(date)
        }