SpringMVC时间Date格式转换，400错误

转自：http://relive123-yahoo-com-cn.iteye.com/blog/1678376

spring mvc前台时间字符串到后台Date的转换

无意中发现对于时间字符串转Date类，根本不用自己去写转换类，spring mvc已经实现了该功能，还是基于注解的，轻松省事，使用org.springframework.format.support.FormattingConversionServiceFactoryBean 

之后，只要在vo里加注解就行了 

Java代码  


@DateTimeFormat(pattern="yyyy-MM-dd")  

private Date dateRangeStart;// 通行日期范围开始  

@DateTimeFormat(pattern="yyyy-MM-dd") 可将形如1980-0-01的字符串转换到Date类 

@NumberFormat(pattern="#,###.##") 可将形如4,500.00的字符串转换成long类型 

怎么注册呢？ 

Java代码  


<bean id="conversionService"    

class="org.springframework.format.support.FormattingConversionServiceFactoryBean">   

<mvc:annotation-driven validator="validator"    

    conversion-service="conversionService" />    

使用<mvc:annotation-driven /> 的话，默认就启用FormattingConversionServiceFactoryBean了，所以上面的配置也省了。 

但是<mvc:annotation-driven />基本不用，因为总得做些个性化设置，那怎么注册FormattingConversionServiceFactoryBean给spring mvc呢？ 

起初我以为得从DefaultAnnotationHandlerMapping入手，后来通过看<mvc:annotation-driven />的解析器AnnotationDrivenBeanDefinitionParser源码，才发现原来是AnnotationMethodHandlerAdapter的属性 

Java代码  


RuntimeBeanReference conversionService = getConversionService(element, source, parserContext);  

RuntimeBeanReference validator = getValidator(element, source, parserContext);  

  

RootBeanDefinition bindingDef = new RootBeanDefinition(ConfigurableWebBindingInitializer.class);  

bindingDef.setSource(source);  

bindingDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);  

bindingDef.getPropertyValues().add("conversionService", conversionService);  

bindingDef.getPropertyValues().add("validator", validator);  

  

RootBeanDefinition annAdapterDef = new RootBeanDefinition(AnnotationMethodHandlerAdapter.class);  

annAdapterDef.setSource(source);  

annAdapterDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);  

annAdapterDef.getPropertyValues().add("webBindingInitializer", bindingDef);  

annAdapterDef.getPropertyValues().add("messageConverters", getMessageConverters(source));  

getConversionService方法内部 

Java代码  


if (element.hasAttribute("conversion-service")) {  

    return new RuntimeBeanReference(element.getAttribute("conversion-service"));  

}  

else {  

    RootBeanDefinition conversionDef = new RootBeanDefinition(FormattingConversionServiceFactoryBean.class);  

    conversionDef.setSource(source);  

    conversionDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);  

    String conversionName = parserContext.getReaderContext().registerWithGeneratedName(conversionDef);  

    parserContext.registerComponent(new BeanComponentDefinition(conversionDef, conversionName));  

    return new RuntimeBeanReference(conversionName);  

}  

原来<mvc:annotation-driven />是这么注册FormattingConversionServiceFactoryBean的 

如果不使用<mvc:annotation-driven />标签的话,只要配置AnnotationMethodHandlerAdapter的属性就可以了 

Java代码  


<property name="webBindingInitializer">  

    <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">  

        <property name="conversionService">  

            <bean class="org.springframework.format.support.FormattingConversionServiceFactoryBean"></bean>  

        </property>  

    </bean>  

</property>