SpringMVC自定义日期转换器不起作用，报400错误，Failed to convert value of type xxx to required type xxx

太过爱你忘了你带给我的痛 2022-12-17 13:53 7阅读 0赞

## 错误描述 ##

控制台：

> WARN efaultHandlerExceptionResolver - Resolved \[org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: **Failed to convert value of type ‘java.lang.String’ to required type ‘java.util.Date’;** nested exception is org.springframework.core.convert.**ConversionFailedException**: Failed to convert from type \[java.lang.String\] to type \[java.util.Date\] for value ‘2020-10-01’; nested exception is java.lang.IllegalArgumentException\]

页面（400错误）：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNTQyNTM0_size_16_color_FFFFFF_t_70_pic_center]

## 错误原因+解决办法 ##

错误代码（springmvc.xml）

<mvc:annotation-driven conversion-service="conversionServiceFactory" />
    
        
        <mvc:annotation-driven/>

错误原因  
转换器工厂加入到注解驱动`<mvc:annotation-driven conversion-service="conversionServiceFactory" />`写在了开启注解驱动`<mvc:annotation-driven/>`的前面，注解驱动都没有开启，怎么将转换器工厂放入到注解驱动呢？

解决办法：  
将开启注解驱动代码提前`<mvc:annotation-driven/>`，放在转换器工厂的前面，就可以解决问题了。

springmvc模板：

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
        
        
        <context:component-scan base-package="com.xgf.web"/>
    
        
        <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/pages/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
    
        
        <mvc:resources location="/css/" mapping="/css/**" />
        <mvc:resources location="/images/" mapping="/images/**" />
        <mvc:resources location="/js/" mapping="/js/**" />
        <mvc:resources location="/fonts/" mapping="/fonts/**" />
    
        
        <mvc:annotation-driven/>
    
        
        
        <bean id="stringToDateConverter" class="com.xgf.web.converter.StringToDateConverter"/>
        
        <bean id="conversionServiceFactory" class="org.springframework.context.support.ConversionServiceFactoryBean">
            <property name="converters">
                <set>
                    
                    <ref bean="stringToDateConverter"/>
                    
                    
                </set>
            </property>
        </bean>
    
        
        <mvc:annotation-driven conversion-service="conversionServiceFactory" />
        
    </beans>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNTQyNTM0_size_16_color_FFFFFF_t_70_pic_center]: /images/20221122/e64bdce5f17b49628fc634924eecd40d.png