Spring MVC4设置使用fastjson作为json解析器，替代jackson

引用

不论是性能、易用性、特性支持，fastjson都要远好于默认的jackson，所以如果应用程序经常使用ajax进行数据交互，建议用fastjson作为默认解析器，官网：www.fhadmin.org只需要简单配置： 

<mvc:annotation-driven> 

  <mvc:message-converters register-defaults="true"> 

    <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">  

      <property name="supportedMediaTypes" value="application/json"/> 

      <!--设置fastjson特性--> 

      <property name="features"> 

        <array> 

          <!--设置null值也要输出，fastjson默认是关闭的--> 

          <value>WriteMapNullValue</value> 

          <!--设置使用文本方式输出日期，fastjson默认是long--> 

          <value>WriteDateUseDateFormat</value> 

        </array> 

      </property> 

    </bean> 

  </mvc:message-converters>  

</mvc:annotation-driven> 

然后引入fastjson的包就好了。 

附Spring MVC4示例配置文件： 

<?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:context="http://www.springframework.org/schema/context" 

    xmlns:mvc="http://www.springframework.org/schema/mvc" 

    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-4.1.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> 
<!--包扫描--> 

<context:component-scan base-package="com.rs" /> 

<!--数据连接池，此处使用c3p0--> 

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"destroy-method="close"> 

  <property name="driverClass" value="com.mysql.jdbc.Driver" /> 

  <property name="jdbcUrl" value="jdbc:mysql://x.x.x.x:3306/test" /> 

  <property name="user" value="USER" /> 

  <property name="password" value="PASS" /> 

</bean> 

<!--配置事务管理器--> 

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 

  <property name="dataSource" ref="dataSource" /> 

</bean> 

<!--使用fastjson作为json解析器--> 

<mvc:annotation-driven> 

  <mvc:message-converters register-defaults="true"> 

    <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">  

      <property name="supportedMediaTypes" value="application/json"/> 

      <property name="features"> 

        <array> 

          <value>WriteMapNullValue</value> 

          <value>WriteDateUseDateFormat</value> 

        </array> 

      </property> 

    </bean> 

  </mvc:message-converters>  

</mvc:annotation-driven> 

<!--注入JdbcTemplate--> 

<bean id="jdbc" class="org.springframework.jdbc.core.JdbcTemplate"> 

  <property name="dataSource" ref="dataSource" /> 

</bean> 

<!--配置视图--> 

<bean id="jspView" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 

  <property name="prefix" value="/WEB-INF/views/" /> 

  <property name="suffix" value=".jsp" /> 

</bean> 

<!--配置拦截器--> 

<mvc:interceptors> 

  <mvc:interceptor> 

    <!--拦截匹配路径的html和do文件--> 

    <mvc:mapping path="/*/*.html" /> 

    <mvc:mapping path="/*/*.do" /> 

    <!--放过部分请求--> 

    <mvc:exclude-mapping path="/home/login.html" /> 

    <mvc:exclude-mapping path="/home/logout.html" /> 

    <!--自定义的拦截器--> 

   <bean class="com.nids.web.ActionInterceptor" /> 

</mvc:interceptor> 

</mvc:interceptors> 

</beans>