springmvc的类型转换

package cn.hmy.convertion;

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 MyConvertion implements Converter<String, Date>{

    public Date convert(String source) {
        
        /*SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");*/
        SimpleDateFormat sdf=getDateFormat(source);
        try {
            return sdf.parse(source);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    private SimpleDateFormat getDateFormat(String source) {
        //进行正则匹配
        //2016-12-14
        //2016/12/14
        //20161214
        if(Pattern.matches("^\\d{4}-\\d{2}-\\d{2}$", source)){
            return new SimpleDateFormat("yyyy-MM-dd");
        }else if(Pattern.matches("^\\d{4}/\\d{2}/\\d{2}$", source)){
            return new SimpleDateFormat("yyyy/MM/dd");
        }else if(Pattern.matches("^\\d{4}\\d{2}\\d{2}$", source)){
            return new SimpleDateFormat("yyyyMMdd");
        }else if(Pattern.matches("^\\d{4}年\\d{2}月\\d{2}日$", source)){
            return new SimpleDateFormat("yyyy年MM月dd日");
        }
        return null;
    }
    
    

}

<!-- 01.注册自定义的类型转换器 -->
     <bean id="myConvertion" class="cn.hmy.convertion.MyConvertion"></bean>
     
     <!--02.注册类型转换器的服务工厂  产生转换对象  -->
     <bean id="convertionservice" class="org.springframework.context.support.ConversionServiceFactoryBean">
       <property name="converters" ref="myConvertion"></property>
     </bean>
     <!--03.  -->
     <mvc:annotation-driven conversion-service="convertionservice"/>