The configuration of spring and SPRINGMVC in Web.xml __spring

(1) Question: How do I configure the spring IOC container in a Web project?

A: If you need to use spring's IOC container in your Web project, you can make the following configuration in the Web project configuration file Web.xml:

<!--Spring Listener-->

<listener>
<listener-class>org.springframework.web. Contex T. contextloaderlistener</listener-class>
</listener>

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(2) How do I configure Spring MVC in a Web project?

A: To use spring MVC, you need to configure its front-end controller Dispatcherservlet in Web.xml in the Web project configuration file:

<!--Spring MVC servlet-->

<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web. Servlet. Dispatcherservlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value> classpath:spring/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>

</servlet-mapping>

===============================================================================================================

Spring-mvc.xml File Contents:

<?xml version= "1.0" encoding= "UTF-8"?>
<beans xmlns= "Http://www.springframework.org/schema/beans"
Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"
xmlns:context= "Http://www.springframework.org/schema/context"
Xmlns:mvc= "Http://www.springframework.org/schema/mvc"
Xsi:schemalocation= "Http://www.springframework.org/schema/beans
Http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
Http://www.springframework.org/schema/context
Http://www.springframework.org/schema/context/spring-context-3.1.xsd
Http://www.springframework.org/schema/mvc
Http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd ">


<!--automatically scans the package so that Springmvc thinks the class with @controller annotations under the package is a controller-->
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>


<context:component-scan base-package= "com. Xxxx.controller ">
<context:exclude-filter type= "Annotation" expression= "Org.springframework.stereotype.Service"/>
</context:component-scan>


<!--define the prefix of the file to jump, view mode configuration-->
<bean class= "Org.springframework.web.servlet.view.InternalResourceViewResolver" >
<property name= "prefix" value= "/web-inf/"/>
<property name= "suffix" value= ". jsp"/>
</bean>


<!--enable default configuration-->
<mvc:annotation-driven>
<mvc:message-converters register-defaults= "true" >
<!--configuration Fastjson support-->
<bean class= "Com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter" >
<property name= "Supportedmediatypes" >
<list>
<value>application/json</value>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>


<!--configuration file upload, if not using file upload can not configure, of course, if not, then the configuration file does not need to introduce the upload component package-->
<bean id= "Multipartresolver"
class= "Org.springframework.web.multipart.commons.CommonsMultipartResolver" >
<!--default encoding-->
<property name= "defaultencoding" value= "Utf-8"/>
<!--file size maximum-->
<property name= "maxuploadsize" value= "1048576000"/>
Maximum value in <!--memory-->
<property name= "maxinmemorysize" value= "10240"/>
</bean>


</beans>

===============================================================================================================

So <mvc:annotation-driven> tags are mainly used to help us process request mapping, determine which controller method to handle the current request, exception handling.

<context:component-scan/> Tags:
Its implementation class is Org.springframework.context.annotation.ComponentScanBeanDefinitionParser.
The annotation class used to scan the @repository @Service @Controller in the package is then registered in the factory.

and Context:component-scan activates @ required. @ resource,@ autowired, @PostConstruct @PreDestroy @PersistenceContext @PersistenceUnit. This allows you to use @autowired when the bean is applied. Primarily for annotations of entities to spring container management

============================================================================================== < Annotaion-driven/> Tags: contains the following two examples:

requestmappinghandlermapping Processing of @requestmapping annotations

Requestmappinghandleradapter the controller class that handles @controller annotations