SpringMVC自动封装并返回json的两种方法

使用SpringMVC自动封装并返回json数据

方法一，手动配置

XML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"
       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.xsd">

<!--  Controller的组件扫描  -->
    <context:component-scan base-package="com.codejams.controller"/>

<!--  配置内部资源视图解析器  -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--   配置url前缀     -->
        <property name="prefix" value="/jsp/"/>
        <!--   配置url后缀     -->
        <property name="suffix" value=".jsp"/>
    </bean>

<!--  配置处理器适配器  -->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
            </list>
        </property>
    </bean>

</beans>

controller层

方法二，使用SpringMVC注解驱动

xml配置

<?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.xsd
                        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

<!--  Controller的组件扫描  -->
    <context:component-scan base-package="com.codejams.controller"/>

<!--  配置内部资源视图解析器  -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--   配置url前缀     -->
        <property name="prefix" value="/jsp/"/>
        <!--   配置url后缀     -->
        <property name="suffix" value=".jsp"/>
    </bean>

<!--  配置处理器适配器  -->
<!--    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">-->
<!--        <property name="messageConverters">-->
<!--            <list>-->
<!--                <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>-->
<!--            </list>-->
<!--        </property>-->
<!--    </bean>-->

<!--  MVC注解驱动  -->
    <mvc:annotation-driven/>

</beans>

注意：其他代码不变