springmvc類型轉換器

package com.orange.converter;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Pattern;

import org.springframework.core.convert.converter.Converter;

public class MyDateConverter implements Converter<String, Date> {

    public Date convert(String source) {
        
        try {
            SimpleDateFormat sdf = getSimpleDateFormat(source);
            return sdf.parse(source);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        
        return null;
    }
    
    private SimpleDateFormat getSimpleDateFormat(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("yyyyMMdd");
        }else if(Pattern.matches("^\\d{4}/\\d{2}/\\d{2}$", source)){
            sdf = new SimpleDateFormat("yyyy/MM/dd");
        }
        
        return sdf;
    }

}

註冊類型轉換器,配置spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:mvc="http://www.springframework.org/schema/mvc"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xsi:schemaLocation="  
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd  
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    
    <!-- 掃描註解 -->
    <context:component-scan base-package="com.orange.controller" />    
    
    <!-- 開啓類型轉換服務 -->
    <mvc:annotation-driven conversion-service="conversionService"/>
    
    <!-- 註冊自定義類型轉換器 -->
    <bean id="dateConverter" class="com.orange.converter.MyDateConverter"></bean>
    
    <!-- 註冊類型轉換服務 -->
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters" ref="dateConverter"></property>
    </bean>
    
</beans>