SpringMVC uses Json to transmit data, springmvcjson

SpringMVC uses Json to transmit data, springmvcjson

It is very common and useful to use Json for data transmission in web projects. Here we will introduce a method to use Json for data transmission in SpringMVC. In my use, it mainly includes the following four parts (I personally prefer to use maven for project Building ):

1. Introduce the dependent Jar package 　　Add the following dependencies to the POM. xml file (or other Maven project configuration files:

                <dependency>                      <groupId>com.fasterxml.jackson.core</groupId>                             <artifactId>jackson-databind</artifactId>                      <version>2.7.5</version>                  </dependency>                 <dependency>                          <groupId>org.codehaus.jackson</groupId>                          <artifactId>jackson-core-asl</artifactId>                          <version>1.9.13</version>                </dependency>                <dependency>                          <groupId>org.codehaus.jackson</groupId>                          <artifactId>jackson-mapper-asl</artifactId>                         <version>1.9.13</version>                </dependency>

 

2. Start SpringMVC annotation and Json message ConverterThe following snippet is in the SpringMVC configuration file:

         <mvc:annotation-driven />        <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">               <property name="supportedMediaTypes">                  <list>                      <value>text/html;charset=UTF-8</value>                  </list>              </property>         </bean>

 

3. javascript asynchronous request on the JSP Interface

<Script type = "text/javascript"> function getInfo () {$. ajax ({type: "POST", dataType: "json", url: "/ajax/getHtml", success: function (map) {$ ("input [name = getInfo]"). after ("<table>"); $. each (map, function (I, item) {$ ("input [name = getInfo]"). after ("<tr> <td>" + item. userName + "</td>" + "<td>" + item. password + "</td> </tr>") ;}); $ ("input [name = getInfo]"). after ("</table") ;}, error: function (ret) {alert ("loading failed") ;}}</script>

 

4. execute the request in the Controller

@ ResponseBody // The annotation @ RequestMapping (value = "/getHtml") public ModelAndView getHtml () {Map <String, user> map = new HashMap <String, User> (); User li = new User (); li. setUserName ("Li"); li. setPassword ("123"); User na = new User (); na. setUserName ("Na"); na. setPassword ("456"); map. put ("1", li); map. put ("2", na); return new ModelAndView (new MappingJackson2JsonView (), map );}