對於時間字串轉Date類，根本不用自己去寫轉換類，spring mvc已經實現了該功能，還是基於註解的，輕鬆省事，使用org.springframework.format.support.FormattingConversionServiceFactoryBean 
之後，只要在vo里加註解就行了 

1. @DateTimeFormat(pattern="yyyy-MM-dd")  
2. private Date dateRangeStart;// 通行日期範圍開始  

1. <bean id="conversionService"    
2. class="org.springframework.format.support.FormattingConversionServiceFactoryBean">   
3. <mvc:annotation-driven validator="validator"    
4.     conversion-service="conversionService" />    

1. RuntimeBeanReference conversionService = getConversionService(element, source, parserContext);  
2. RuntimeBeanReference validator = getValidator(element, source, parserContext);  
3. RootBeanDefinition bindingDef = new RootBeanDefinition(ConfigurableWebBindingInitializer.class);  
4. bindingDef.setSource(source);  
5. bindingDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);  
6. bindingDef.getPropertyValues().add("conversionService", conversionService);  
7. bindingDef.getPropertyValues().add("validator", validator);  
8. RootBeanDefinition annAdapterDef = new RootBeanDefinition(AnnotationMethodHandlerAdapter.class);  
9. annAdapterDef.setSource(source);  
10. annAdapterDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);  
11. annAdapterDef.getPropertyValues().add("webBindingInitializer", bindingDef);  
12. annAdapterDef.getPropertyValues().add("messageConverters", getMessageConverters(source));  

1. if (element.hasAttribute("conversion-service")) {  
2.     return new RuntimeBeanReference(element.getAttribute("conversion-service"));  
3. }  
4. else {  
5.     RootBeanDefinition conversionDef = new RootBeanDefinition(FormattingConversionServiceFactoryBean.class);  
6.     conversionDef.setSource(source);  
7.     conversionDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);  
8.     String conversionName = parserContext.getReaderContext().registerWithGeneratedName(conversionDef);  
9.     parserContext.registerComponent(new BeanComponentDefinition(conversionDef, conversionName));  
10.     return new RuntimeBeanReference(conversionName);  
11. }  

1. <property name="webBindingInitializer">  
2.     <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">  
3.         <property name="conversionService">  
4.             <bean class="org.springframework.format.support.FormattingConversionServiceFactoryBean"></bean>  
5.         </property>  
6.     </bean>  
7. </property>