Ajax framework's SSM integration framework implements ajax verification

This article mainly introduces the SSM integration framework of the Ajax framework to implement ajax verification. Friends who need it can refer to it

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1. Import jar package

2. Configure spring-servlet.xml

<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>

3. Use @ResponseBody in the controller to implement the returned json data format

@ResponseBody
   @RequestMapping(value="queryByUser", method=RequestMethod.POST,produces="application/json;charset=UTF-8") 
   public User queryByName(User user,HttpServletRequest request){
     User u = userBiz.queryByName(user);
     return u;
   }

4. Receive the query results on the page

function checkUser(){
     var username=$("#username").val();
     
     $.ajax({
       url:"queryByUser",
       type:"post",
       data:{"username":username},
       dataType:"json",
      success:function(data){
         if (data!=null ) {
         $("#userSpan").text("用户名已存在");
         $("#username").val('');
       }else if(data==null && username !=''){
         $("#userSpan").text("用户名可用");
       }
      }
     });
   }

The implementation result is as follows Like this:

#The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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