项目要整合json,想问jeecms如何整合json 具体情况是这样的: 我提交表单后,能进入action断点,但是页面完全没有输出... 求解答... 在线等

页面代码:
<p>Demo 1 计算并返回值</p>
<div style="border: 1px solid #ccc; width: 250px;">
Add Two Numbers: <br/>
<input id="inputNumber1" type="text" size="5"> +
<input id="inputNumber2" type="text" size="9">
<input type="submit" id="demo1" value="Add" /> <br/>
Sum: <br>
<span id="sum">(Result will be shown here)</span>
</div>
<script type="text/javascript"> 
$(function() {
 $("#demo1").click(function(){
$.post("${base}/main/ajax/addTest.jhtml",
{inputNumber1:  $("#inputNumber1").val(),
    inputNumber2:  $("#inputNumber2").val() 
   },
function(data){   
$("#sum").replaceWith('<span id="sum">'+ data + '</span>');    
});
 });
</script>

Action类:

/**  
     * 提交表单并进行运算.
 */
@RequestMapping(value = "/addTest.jhtml", method = RequestMethod.POST)
public @ResponseBody Integer add(
@RequestParam(value = "inputNumber1", required = true)Integer inputNumber1,
@RequestParam(value = "inputNumber2", required = true)Integer inputNumber2) {
// 实现运算
Integer sum = inputNumber1 + inputNumber2;
System.out.println("sum: " + sum);
// @ResponseBody 会自动的将返回值转换成JSON格式
// 但是你必须添加jackson的jar包!!!
return sum;
}

application-context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:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
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-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"
default-lazy-init="true">

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>/WEB-INF/config/jdbc.properties</value>
</list>
</property>
</bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driverClassName}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="autoCommitOnClose" value="true"/>
<property name="checkoutTimeout" value="${cpool.checkoutTimeout}"/>
<property name="initialPoolSize" value="${cpool.minPoolSize}"/>
<property name="minPoolSize" value="${cpool.minPoolSize}"/>
<property name="maxPoolSize" value="${cpool.maxPoolSize}"/>
<property name="maxIdleTime" value="${cpool.maxIdleTime}"/>
<property name="acquireIncrement" value="${cpool.acquireIncrement}"/>
<property name="maxIdleTimeExcessConnections" value="${cpool.maxIdleTimeExcessConnections}"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingLocations">
<list>
<value>classpath*:/com/jeecms/core/entity/hbm/*.hbm.xml</value>
<value>classpath*:/com/jeecms/cms/entity/main/hbm/*.hbm.xml</value>
<value>classpath*:/com/jeecms/cms/entity/assist/hbm/*.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQLInnoDBDialect
hibernate.show_sql=false
hibernate.format_sql=false
hibernate.query.substitutions=true 1, false 0
hibernate.jdbc.batch_size=20
hibernate.cache.use_query_cache=true
</value>
</property>
<property name="entityInterceptor">   
<ref local="treeInterceptor"/>
</property>
<property name="cacheProvider">
<ref local="cacheProvider"/>
</property>
<property name="lobHandler">
<ref bean="lobHandler" />
</property>
</bean>

<bean id="lobHandler" class="org.springframework.jdbc.support.lob.DefaultLobHandler" lazy-init="true"/>

<bean id="cacheProvider" class="com.jeecms.common.hibernate3.SpringEhCacheProvider">
<property name="configLocation">
<value>classpath:ehcache-hibernate.xml</value>
</property>
<property name="diskStoreLocation">
<value>/WEB-INF/cache/hibernate</value>
</property>
</bean>
<bean id="treeInterceptor" class="com.jeecms.common.hibernate3.TreeIntercptor"/>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<mvc:annotation-driven/>
<context:annotation-config/>
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>