Spring MVC Architecture (v)

First, Spring MVC framework Construction steps

　　1. Importing JAR files

　　　　Spring-web-3.2.0.release

Spring-webmvc-3.2.0.release

　　2. Configuring Servlets and other parameters in Web. xml

<?XML version= "1.0" encoding= "UTF-8"?><Web-appversion= "2.5"xmlns= "Http://java.sun.com/xml/ns/javaee"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  <Display-name></Display-name>      <welcome-file-list>    <Welcome-file>index.jsp</Welcome-file>  </welcome-file-list>    <!--Configuring the front-end controller in Web. XML, Dispatcherservlet is the spring's most and core class -  <servlet>          <Servlet-name>Dispatcherservlet</Servlet-name>          <Servlet-class>Org.springframework.web.servlet.DispatcherServlet</Servlet-class>          <Init-param>              <Param-name>Contextconfiglocation</Param-name>              <Param-value>Classpath:applicationContext.xml</Param-value>          </Init-param>          <Load-on-startup>1</Load-on-startup>  </servlet>  <servlet-mapping>          <Servlet-name>Dispatcherservlet</Servlet-name>          <Url-pattern>/</Url-pattern>  </servlet-mapping>    <!--set character encoding via filter -  <Filter>          <Filter-name>Characterencodingfilter</Filter-name>          <Filter-class>Org.springframework.web.filter.CharacterEncodingFilter</Filter-class>          <Init-param>              <Param-name>Encoding</Param-name>              <Param-value>Utf-8</Param-value>          </Init-param>  </Filter>  <filter-mapping>          <Filter-name>Characterencodingfilter</Filter-name>          <Url-pattern>/*</Url-pattern>  </filter-mapping>  </Web-app>

　　3, Configuration Applicationcontext.xml　

<?XML version= "1.0" encoding= "UTF-8"?><Beansxmlns= "Http://www.springframework.org/schema/beans"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xmlns:p= "http://www.springframework.org/schema/p"XMLNS:AOP= "HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP"Xmlns:context= "Http://www.springframework.org/schema/context"Xmlns:tx= "Http://www.springframework.org/schema/tx"xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/ Spring-beans-3.2.xsd HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP http://www.springframework.org/schema/aop/ Spring-aop-3.2.xsd Http://www.springframework.org/schema/context http://www.springframework.org/schema/context/ Spring-context-3.2.xsd Http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/ Spring-tx-3.2.xsd ">        <Context:component-scanBase-package= "Com.action"/>        <Beanclass= "Org.springframework.web.servlet.view.InternalResourceViewResolver">        < Propertyname= "prefix"value="/" />        < Propertyname= "suffix"value= ". jsp" />    </Bean>    </Beans>

4. Create controller--->> handle requests

 Packagecom.action;ImportOrg.springframework.stereotype.Controller;Importorg.springframework.web.bind.annotation.RequestMapping;ImportOrg.springframework.web.servlet.ModelAndView;ImportCom.entity.User; @Controller Public classuseraction {@RequestMapping ("Submit")     PublicModelandview Show (user user) {Modelandview m=NewModelandview ("list"); M.addobject ("Uname", User.getuname ()); M.addobject ("UPass", User.getupass ()); returnm; }}

Ii. several ways of parameter transfer in controller controllers

1, can be injected through the JavaBean already created

Import Com.entity.User; @Controller  Public class useraction {        @RequestMapping ("Submit")    public  modelandview Show (user user) {         New Modelandview ("list");        M.addobject ("uname", User.getuname ());        M.addobject ("UPass", User.getupass ());         return m;    }}

　　2, the corresponding name auto-fill

@RequestMapping ("Submit")    public  modelandview Show (String uname,string UPass, HttpServletRequest request) {        new modelandview ("list");        M.addobject ("uname", uname); // need to match        the name of the foreground M.addobject ("UPass", UPass); // need to match        the name of the foreground return m;    }

　　3. If the name is inconsistent, you need to add an annotation description

 @RequestMapping ("Submit"  /**   * If the name of the foreground name does not match the parameter name, use the * value parameter name * Required whether it must be * defaultvalue if it is empty, the current Default value  */ public  modelandview Show (@Re Questparam (value= "uname", Required=false , defaultvalue= "xxx" ) String uname,string UPass) {modelandview m  = new  Model        Andview ("list"  "uname", uname); //  needs to be consistent with the name of the foreground  m.addobject ("UPass", UPass); //         return      m; }

Spring MVC Architecture (v)