spring3 MVC jquery ajax under the combination of simple to use - Super Simple

Today need to write a simple application: user registration, check the user name is available.

Seemingly on the next before struts2 ajax support is good (actually irritated), and there are many online tutorials. But this is replaced springmvc, and it is spring3, few things online.

However, the discovery or springsource article .

The client uses the formValidtor plug, this plug-in is really good, huh, huh.

$("#loginName").formValidator({onshow:" Please enter a user name  ",onfocus:" The user name for at least 6 characters  , Up to 15 characters  ",oncorrect:" The username you can register  "}).inputValidator({min:6,max:15,onerror:" Did you enter the name of illegal, please confirm  "}).regexValidator({regexp:"username",datatype:"enum",onerror:" User name is not in the correct format  "}).ajaxValidator({
            type : "get",
                url : "${ctx}/ajax/checkLoginName",
                datatype : "json",
                success : function(data){
            if( data == "1" )
                return true;
                return false;
                buttons: $("#button"),
                error: function(){alert(" The server did not return the data, perhaps the server is busy  , Please try again  ");},
                onerror : " The user name is not available, please change username  ",
                onwait : " The user name to validate, please wait  ..."

This is formValidator ajax form validation that comes with very clear.

In the article, found on the plot of a foreigner can have a more simple way ajax call:

jQuery.getJSON( url, [ data ], [ callback(data, textStatus) ] )

Known from jquey website:

This is a shorthand Ajax function, which is equivalent to:

  url: url,
  dataType: 'json',
  data: data,
  success: callback

Corresponds to the server can be too cool, and really is a standard spring control! ! ! !

public class CommonServControl {

        @RequestMapping(value = "/checkLoginName", method = RequestMethod.GET)
        public @ResponseBody boolean checkLoginName(@RequestParam String loginName) {
                boolean b = userServ.checkLoginName(loginName);
                return b;

        private UserServ userServ;


I believe this code is enough "POJO" instead.

Of course, pay attention! ! ! This is not enough!


Underneath the covers, Spring MVC delegates to a HttpMessageConverter to perform the serialization. In this case, Spring MVC invokes a MappingJacksonHttpMessageConverter built on the Jackson JSON processor. This implementation is enabled automatically when you use the mvc: annotation-driven configuration element with Jackson present in your classpath.

This passage means, spring use "HttpMessageConverter" to work, so we need to do one thing:

In springMVC's XXX-servlet.xml file by adding such a line:

<mvc:annotation-driven />

 Namespace  :
<beans xmlns="http://www.springframework.org/schema/beans"
        xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
                http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">

OK bin!

This is a post in a way which is almost, huh, huh

1. $( "#account" ).submit( function () {

2. var account = $( this ).serializeObject();

3. $.postJSON( "account" , account, function (data) {

4. $( "#assignedId" ).val(data.id);

5. showPopup();

6. });

7. return false ;

8. });

On the server-side, the Controller is more standard Java with Spring MVC annotations:

view source

Print ?

01. @RequestMapping (method=RequestMethod.POST)

02. public @ResponseBody Map<String, ? extends Object> create( @RequestBody Account account, HttpServletResponse response) {

03. Set<ConstraintViolation<Account>> failures = validator.validate(account);

04. if (!failures.isEmpty()) {

05. response.setStatus(HttpServletResponse.SC_BAD_REQUEST);

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