spring mvc 3.0 json 操作中定制 http header.

大家都知道spring mvc 3.0中的JSON 响应用起来很方便的, 用@ResponseBody 标记, 然后handler 的方法的返回值设为Object. 但是现在的问题是这样不能够定制Http header.

    之前有网友称使用HttpEntity. 具体怎么用我也不清楚, 只是个人感觉用起来不够优雅. 所以就有了这个文章, 经过一翻尝试. 笔者实现了定制Http 响应头中的缓存信息, 不设这个的话傻傻的IE7 会把AJAX 请求作缓存. 非常讨厌.

    具体实现方法是继承org.springframework.http.converter.json.MappingJacksonHttpMessageConverter, 如下是我的代码

import java.io.IOException;

import org.springframework.http.HttpOutputMessage;
import org.springframework.http.converter.HttpMessageNotWritableException;
import org.springframework.http.converter.json.MappingJacksonHttpMessageConverter;

public class NoCacheMappingJacksonHttpMessageConverter extends
		MappingJacksonHttpMessageConverter {

	@Override
	protected void writeInternal(Object o, HttpOutputMessage outputMessage)
			throws IOException, HttpMessageNotWritableException {
		outputMessage.getHeaders().set("Cache-Control", "no-cache");
		super.writeInternal(o, outputMessage);
	}
}

当然也少不了dispatcher-servlet.xml中的配置:

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <bean class="org.springframework.http.MediaType">
                                <constructor-arg value="text"/>
                                <constructor-arg value="plain"/>
                                <constructor-arg value="utf8"/>
                            </bean>
                        </list>
                    </property>
                </bean>
                <!-- 
                <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
                 -->
                <bean class="com.fpi.mespvc.web.util.NoCacheMappingJacksonHttpMessageConverter"/>
            </list>
        </property>
    </bean>

笔者亲测. 完全好用.

评论

3 楼 jd2bs 2012-11-19  

奇怪,我在spring3.1.2中 这样不行  response header 没加上

public class wbxJacksonMessageConverter extends MappingJacksonHttpMessageConverter {

	@Override  
    protected void writeInternal(Object o, HttpOutputMessage outputMessage)  
            throws IOException, HttpMessageNotWritableException {  
        outputMessage.getHeaders().set("Cache-Control", "no-cache");
        outputMessage.getHeaders().set("Access-Control-Allow-Headers", "Origin, x-requested-with, content-type, accept");
        super.writeInternal(o, outputMessage);  
    }  
}

	<bean
		class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />

	<bean
		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> 
		<property name="messageConverters">  
          
            <ref bean="mappingJacksonHttpMessageConverter"/>  
          
        </property>  
    </bean>  
   <bean id="mappingJacksonHttpMessageConverter" class="com.***.util.wbxJacksonMessageConverter">  
    <property name="supportedMediaTypes">  
        <list>  
            <value>text/html;charset=UTF-8</value>
            <value>application/json;charset=UTF-8</value>
        </list>  
    </property>  
   </bean>  
  <context:annotation-config/> 

 

2 楼 tq02ksu 2011-07-06  

要把ＩＥ的缓存清一下才能有效的.
再不灵的话用ＦＦ看一下　ＨＴＴＰ　影响头.
有没有Ｃache-Control: no-cache.

1 楼 x163maiyatang 2011-07-01  

问下  我遇到的 就是这种问题   在ie情况下  就会缓存数据  但是像你那样配置还是 不好用        ！！