在使用springMVC時候,前端頁面常會要求得到json格式的數據,尤其是在ajax向後臺請求後,迫切希望得到json格式數據。網上有很多方法,我將自己項目中用過的兩種方法貼一下:
方法一:
spring-mvc.xml配置中,添加對json的支持的bean:
<bean id="messageAdapter"
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
</list>
</property>
</bean>
controller的方法中返回值類型爲一個Object的對象;這個方法添加@ResponseBody註釋即可:
@RequestMapping("/subjectMonitor/save")
@ResponseBody//一定要加這個註釋標籤,並返回類型爲Object的對象就可以,即可返回json類型數據
public Map<String,SubjectMonitorDto> save(Model model,SubjectMonitorDto subjectMonitorDto){
subjectMonitorService.insert(subjectMonitorDto);
Map map=new HashMap();
map.put("dto",subjectMonitorDto);
return map;
//return "forward:/logout";
}
方法二:
在spring-mvc中配置一個bean:
<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="1"/>
<property name="favorParameter" value="false"/>
<property name="ignoreAcceptHeader" value="true"/>
<property name="mediaTypes">
<map>
<entry key="json" value="application/json"/>
<entry key="jsons" value="text/jsons"/>
</map>
</property>
<property name="defaultViews">
<list>
<bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"/>
</list>
</property>
</bean>
controller的方法返回值類型爲void,在model中添加屬性就可:
@RequestMapping("/subjectMonitor/save1")
public void save1(Model model,SubjectMonitorDto subjectMonitorDto){
subjectMonitorService.insert(subjectMonitorDto);
model.addAttribute("dto","dafdaf");
//return "forward:/logout";
}