Question

我遇到了一个无法在ObjectMapper配置上解决的问题。我需要将其配置为忽略那些没有我的POJO的参数...这么简单，但我配置了千种不同的方式，我无法使其工作。

我的servlet.xml

<bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView" >
     <property name="objectMapper">
     <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
         <property name="featuresToDisable">
           <array>
            <util:constant 
            static-field="com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES"/>
          </array>
         </property>
      </bean>                  
    </property>  
</bean>

我也尝试扩展ObjectMapper类，但得到了相同的结果。我看到映射器配置正确但我希望MappingJackson2HttpMessageConverter接收到不同的ObjectMapper实例。我不知道还有什么可以让我忽略全局参数。

当我使用应该忽略的参数发出请求（POJO上没有）时，请求中出现语法错误。

我正在使用：春季3.2.0 杰克逊2.1.2

致以最诚挚的问候和感谢

Answer 1

尝试

<!-- 
     Implement a custom ObjectMapper and initialize the features you needed 
     eg. FAIL_ON_UNKNOWN_PROPERTIES 
-->
<bean id="jacksonObjectMapper" class="com.sample.CustomObjectMapper"/>

<!-- Replace Spring's default message converter -->
<mvc:annotation-driven>
  <mvc:message-converters>
    <ref bean="jacksonObjectMapper"/>
  </mvc:message-converters>
</mvc:annotation-driven>

Answer 2

解决方案已在Spring 3.2.18.RELEASE和Jackson 2.7.5上进行了测试。

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

<bean id="jacksonObjectMapper"
    class="com.fasterxml.jackson.databind.ObjectMapper" />

<bean
    class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
    <property name="targetObject" ref="jacksonObjectMapper" />
    <property name="targetMethod" value="configure" />
    <property name="arguments">
        <list>
            <value
                type="com.fasterxml.jackson.databind.DeserializationFeature">FAIL_ON_UNKNOWN_PROPERTIES</value>
            <value>false</value>
        </list>
    </property>
</bean>

<mvc:annotation-driven>
    <mvc:message-converters>
        <bean
            class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
            <property name="objectMapper" ref="jacksonObjectMapper" />
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>

Spring 3.2，Jackson2 ObjectMapper配置

2 个答案: