初始化参数绑定——日期格式

单种日期格式转换 （yyyy-MM-dd）

使用@InitBinder注解实现日期格式转换

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.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){
            //PropertyEditor
            //类  implements  PropertyEditor
            binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true));
        }
         
        
        @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";
        }
        
        
    }

    

多种日期格式转换

使用正则表达式

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;
    }
     
     
     
     
}

 handler部分代码：

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());
        
        }
         
        @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";
        }
        
        
    }

    

这样就可以进行多种日期类型转换了！！！！