Spring配置MessageConvertor

开发中经常使用Fastjson来进行json数据的封装，不过Spring默认采用的是Jackson，如果需要定义fastjson为默认，你可以进行如下操作：

在你spring启动注解的配置文件中，进行如下配置：

<mvc:annotation-driven>
    <mvc:message-converters>
        <bean
            class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
            <property name="supportedMediaTypes">
                <list>
                    <value>text/plain;charset=UTF-8</value>
                    <value>text/html;charset=UTF-8</value>
                    <value>application/json</value>
                </list>
            </property>
            <property name="features">
                <list>
                    <value>WriteMapNullValue</value>
                    <value>QuoteFieldNames</value>
                </list>
            </property>
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>

当然如果配置文件xml顶部声明版本为3.0或者spring版本为3.0都可能出现如下错误

Element 'mvc:annotation-driven' must have no character or element 
information item [children], because the type's content type is empty.

所以，尽量升级spring为当前文档的最新版本,将xml的声明修改为3.1及以上！

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" 
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc" 
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-3.2.xsd  
      http://www.springframework.org/schema/context  
      http://www.springframework.org/schema/context/spring-context.xsd  
      http://www.springframework.org/schema/mvc  
      http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">