Spingmvc 基础学习（二）—— mvc注解配置

r囧r小猫 2022-05-29 06:10 113阅读 0赞

spring mvc常用的还是注解模式，也基本看不到其他模式的使用，所以我也只对注解模式进行介绍。

配置web.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
      <display-name>springMVC_01</display-name>
       <filter>
      <filter-name>character</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>character</filter-name>
      <url-pattern>/*</url-pattern>
      </filter-mapping>
      <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:springMVC.xml</param-value>
      </init-param>
      </servlet>
      <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>*.do</url-pattern>
      </servlet-mapping> 
    </web-app>

主要代码为<servlet></servlet>和<servlet-mapping></servlet-mapping>标签的内容，该配置会对所有.do的请求进行拦截，日常使用上更多的是对所有请求进行拦截，需要将<url-pattern></url-pattern>标签的内容"\*.do"改成"/"

配置springMVC配置文件

<?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:mvc="http://www.springframework.org/schema/mvc"
    	xmlns:context="http://www.springframework.org/schema/context"
    	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans 
    		http://www.springframework.org/schema/beans/spring-beans-3.1.xsd 
    		http://www.springframework.org/schema/mvc 
    		http://www.springframework.org/schema/mvc/spring-mvc-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/aop 
    		http://www.springframework.org/schema/aop/spring-aop-3.1.xsd 
    		http://www.springframework.org/schema/tx 
    		http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">
    		
    		<context:component-scan base-package="cn.itcast"></context:component-scan>
    		
    		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
    		
    		<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
    		
    		<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    		<property name="prefix" value="/WEB-INF/jsps/"></property>
    		<property name="suffix" value=".jsp"></property>
    		</bean>		
    </beans>

可以用<mvc:annotation-driven />代替添加注解映射器和添加适配器，这会默认配置注解映射器和注解适配器等bean

这样Spring mvc 的注解配置就配置完成了，当然还需要导入jar包，不再做过多介绍