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，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>
本文出自 “兔子窝” 博客，请务必保留此出处http://boytnt.blog.51cto.com/966121/1771390