如果在使用@RequestParam时需要自定义转换器,我应该使用什么?

弹簧3有 @NumberFormat

public void deposit(@RequestParam("accountId") Integer accountId,  
    @RequestParam("amount") @NumberFormat(pattern = "###.###,##") BigDecimal amount) 
{...} 

你需要 <mvc:annotation-driven> 使能。

• Spring MVC 3 Showcase

更一般地,您可以使用 ConversionServiceFactoryBean . 一旦你这样做了你就需要 add a custom web binding initializer

示例配置:

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="webBindingInitializer">
      <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
          <property name="conversionService" ref="conversionService"/>
      </bean>
    </property>
</bean>

<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
    <property name="converters">
        <list>
            <ref bean="myCustomConverter"/>
        </list>
    </property>
</bean>