下面是官方文档对于@ResponseBody注解的解释：
Mapping the response body with the @ResponseBody annotation The @ResponseBody annotation is similar to @RequestBody. This annotation can be put on a method and indicates that the return type should be written straight to the HTTP response body (and not placed in a Model, or interpreted as a view name). For example: @RequestMapping(path = "/something", method = RequestMethod.PUT) @ResponseBody public String helloWorld() {
return "Hello World";
}
The above example will result in the text Hello World being written to the HTTP response stream. As with @RequestBody, Spring converts the returned object to a response body by using an HttpMessageConverter. For more information on these converters, see the previous section and Message Converters.
@ResopnseBody注解能够 直接把 控制器返回变量（String）直接 返回给浏览器,也可以通过配置 后，把 对象 序列化成Json数据返回给浏览器！如果为 null 就会返回空白。
怎么配置呢 ？需要配置MessageConverter:
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJackson2HttpMessageConverter" /> </list> </property> </bean> <bean id="mappingJackson2HttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;
charset=UTF-8</value> <value>text/json;
charset=UTF-8</value> <value>application/json;
charset=UTF-8</value> </list> </property> </bean>
下面贴出在官方文档中的位置：
这个需要jackson jar包支持，需要 jackson-annotations,jackson-core,jackson-databind三个包，：
控制器代码：
@RequestMapping("House/ClassManager/addByAjax") @ResponseBody public HanBlog_Class ClassManager_addByAjax(HttpServletRequest request){
if(request.getSession().getAttribute("hanblog_uid")==null) return null;
HanBlog_Class objClass=new HanBlog_Class();
return objClass;
}
jquery代码：
//|增加 $("#hanblog_add_btn").click(function(){
var classname=$("#add_input_name").val();
var classintroduction=$("#add_input_introduction").val();
alert("分类名称:"+classname+"分类介绍:"+classintroduction);
$.get("<c:url value="/House/ClassManager/addByAjax.do" />",function(result){
alert(result);
}
);
}
);
运行返回例子：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
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