springmvc解决ajax返回json数据乱码问题

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 <bean id="stringHttpMessageConverter"
    class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/plain;charset=UTF-8</value>
                <value>application/json;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
    <!-- Jackson 是Spring 自带的功能 -->
    <bean id="mappingJackson2HttpMessageConverter"
                class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>application/json;charset=UTF-8</value>
                <value>application/xml;charset=UTF-8</value>
                <value>text/html;charset=UTF-8</value>
                <value>text/plain;charset=UTF-8</value>
                <value>text/xml;charset=UTF-8</value>
                <value>text/javascript;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <mvc:annotation-driven>
        <mvc:message-converters>
            <ref bean="stringHttpMessageConverter" />
            <ref bean="mappingJackson2HttpMessageConverter" />
        </mvc:message-converters>
    </mvc:annotation-driven>