springmvc jackon 为什么不返回json

发布网友发布时间：2022-10-08 02:53

共1个回答

热心网友时间：2023-11-02 04:51

SpringMvc配置：

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
        <list>
            
            <ref bean="mappingJacksonHttpMessageConverter" />
        </list>
    </property>
</bean>

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

<bean id="mappingJacksonHttpMessageConverter"
    class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
     <property name = "supportedMediaTypes">
          <list>
            <bean class="org.springframework.http.MediaType">
             <constructor-arg index="0" value="text"/>
             <constructor-arg index="1" value="plain"/>
             <constructor-arg index="2" value="UTF-8"/>
            </bean>
            <bean class="org.springframework.http.MediaType">
             <constructor-arg index="0" value="*"/>
             <constructor-arg index="1" value="*"/>
             <constructor-arg index="2" value="UTF-8"/>
            </bean>
            <bean class="org.springframework.http.MediaType">
             <constructor-arg index="0" value="text"/>
             <constructor-arg index="1" value="*"/>
             <constructor-arg index="2" value="UTF-8"/>
            </bean>
             <bean class="org.springframework.http.MediaType">
             <constructor-arg index="0" value="application"/>
             <constructor-arg index="1" value="json"/>
             <constructor-arg index="2" value="UTF-8"/>
            </bean>
          </list>
    </property>
</bean>

Controller代码

@RequestMapping(value="update",method=RequestMethod.POST)
@ResponseBody
public Map<String,Object> update(SOUser entity,MultipartHttpServletRequest request){
    Long userId = entity.getId();
    Long uid = TokenManager.getUserId();
    if(StringUtils.isBlank(userId,uid) || !uid.equals(userId)){
        resultMap.put("status", 500);
        resultMap.put("message", "非法修改！");
    }else{
        String name = "portrait/" + userId;
        String portrait = ImageManager.saveImages(name, request);
        if(StringUtils.isNotBlank(portrait)){
            entity.setPortrait(portrait);
        }
        userService.updateByPrimaryKeySelective(entity);
        resultMap.put("status", 200);
        resultMap.put("message", "修改成功！");
        entity = userService.selectByPrimaryKey(userId);
        //更新
        TokenManager.login(entity);
    }
    return resultMap;
}