spring mvc 返回json的配置

<!-- 启动Springmvc注解驱动 -->

    <mvc:annotation-driven/>

 <!-- 返回json 方法一 需要导入 fastjson.jar包 --> 

    <mvc:annotation-driven>

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

            <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->

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

                <property name="supportedMediaTypes">

                    <list>

                        <!-- 这里顺序不能反，一定先写text/html,不然ie下出现下载提示 -->

                        <value>text/html;charset=UTF-8</value>

                        <value>application/json;charset=UTF-8</value>

                    </list>

                </property>

            </bean>

        </mvc:message-converters>

    </mvc:annotation-driven>

     

   

  <!-- 返回json 方法二 需要导入 jackson-annotations.jar,jackson-core.jar,jackson-databind.jar--> 

   <!--  <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>

    <beanclass="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">

        <property name="messageConverters">

            <list>

                <beanclass="org.springframework.http.converter.StringHttpMessageConverter">

                    <property name="supportedMediaTypes">

                        <list>

                            <value>text/html; charset=UTF-8</value>

                            <value>application/json;charset=UTF-8</value>

                        </list>

                    </property>

                </bean>

                <beanclass="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">

                    <property name="supportedMediaTypes">

                        <list>

                            <value>text/html; charset=UTF-8</value>

                            <value>application/json;charset=UTF-8</value>

                        </list>

                    </property>

                </bean>

            </list>

        </property>

    </bean> -->