Spring mvc @initBinder 类型转化器的使用

1.jsp 页面

<form action="${pageContext.request.contextPath }/first.do" method="post">

             出生日期:<input name="birthday"/><br/><br/>

             年龄:<input name="age"/><br/><br/>

   <input type="submit" value="注册"/>

</form>

2 日期转换类

package cn.happy.controller;

 

import java.sql.Date;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.regex.Pattern;

 

import org.springframework.beans.TypeMismatchException;

import org.springframework.beans.propertyeditors.PropertiesEditor;

 

public class MyDateEditor extends PropertiesEditor{

     @Override

    public void setAsText(String source) throws IllegalArgumentException {

          

      SimpleDateFormat sdf=getDate(source);

      //做一个操作

      try {

        setValue(sdf.parseObject(source));

    } catch (ParseException e) {

        e.printStackTrace();

    }

          

    }

 

    private SimpleDateFormat getDate(String source) {

        SimpleDateFormat sdf=null;

        if (Pattern.matches("^\\d{4}-\\d{2}-\\d{2}$", source)) {

            sdf=new SimpleDateFormat("yyyy-MM-dd");

        }else if (Pattern.matches("^\\d{4}/\\d{2}/\\d{2}$", source)) {

            sdf=new SimpleDateFormat("yyyy/MM/dd");

        }else if (Pattern.matches("^\\d{4}\\d{2}\\d{2}$", source)) {

            sdf=new SimpleDateFormat("yyyyMMdd");

        }else {

            throw new TypeMismatchException("", Date.class);

        }

         

        return sdf;

    }

      

      

      

      

}

3 action 类

package cn.happy.controller;

 

import java.beans.PropertyEditor;

import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.util.Date;

 

import org.springframework.beans.propertyeditors.CustomDateEditor;

import org.springframework.beans.propertyeditors.PropertiesEditor;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.WebDataBinder;

import org.springframework.web.bind.annotation.InitBinder;

import org.springframework.web.bind.annotation.RequestMapping;

     @Controller

    public class FirstController {

         /**

          *

          * @param binder

          */

         @InitBinder

        public void initBinder(WebDataBinder binder){

            binder.registerCustomEditor(Date.class,new MyDateEditor());

            System.out.println("===============11111");

             

        }

          

        @RequestMapping("/first.do")

        //类型转化工作一定是在真正的handler方法执行前执行的。

        public String doFirst(Date birthday,int age) throws Exception{

            System.out.println(birthday+"===============");

            System.out.println(age+"===============");

            return "/WELCOME.jsp";

        }

         

         

    }