配置方法一

**1、匯入第三方的jackson包，jackson-mapper-asl-1.9.7.jar和jackson-core-asl-1.9.7.jar。 
2、spring配置檔案新增**

 <mvc:annotation-driven/>

<!-- 避免IE執行AJAX時,返回JSON出現下載檔案 -->  
    <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"
 
>  
        <property name="supportedMediaTypes">  
            <list>  
                <value>text/html;charset=UTF-8</value>  
            </list>  
        </property>  
    </bean>  

    <!-- 啟動Spring MVC的註解功能，完成請求和註解POJO的對映 -->  
    <bean class
 
="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
        <property name="messageConverters">  
            <list>  
                <ref bean="mappingJacksonHttpMessageConverter" /><!-- json轉換器 -->  
            </list>  
        </property
 
>  
    </bean> 

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配置方案二(常用)

**1、匯入第三方的fastjson包，fastjson-1.1.34.jar 
2、Spring配置檔案新增：**

  <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <!-- 避免IE執行AJAX時,返回JSON出現下載檔案 -->
            <bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

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配置方案三

需要匯入 jackson-annotations-*.jar, jackson-core-.jar, jackson-databind-.jar 
2、在spring中新增配置**

  <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <bean class="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>
                <bean class="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>

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下載地址:http://download.csdn.net/detail/l3922768721/9543001