在web.xml中加载SpringMVC配置文件的两种方式

系统管理员 2022-01-05 14:21 355阅读 0赞

### 默认路径方式 ###

**这种配置方式语句写的少，但是约束比较多。**

1、servlet-name必须是`springmvc`  
2、springmvc配置文件的文件名必须是`springmvc-servlet.xml`  
3、`springmvc-servlet.xml`必须在WEB-INF文件夹下

`web.xml`

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
      <display-name>SSM</display-name>
    
      <servlet>
        
      	<servlet-name>springmvc</servlet-name>
      	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    	<load-on-startup>1</load-on-startup>
      </servlet>
      
      <servlet-mapping>
      	<servlet-name>springmvc</servlet-name>
      	<url-pattern>/</url-pattern>
      </servlet-mapping>
    </web-app>

`springmvc-servlet.xml`  
文件名必须是这个，且必须在WEB-INF文件夹下。

<?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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
         
         
        <context:component-scan base-package="com.ssm"></context:component-scan>
      	
    	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    		<property name="prefix" value="/WEB-INF/page/"></property>
    		<property name="suffix" value=".jsp"></property>
    	</bean>
    </beans>

### 指定路径方式 ###

**需要在init-param中指定配置文件路径。**  
1、servlet-name必须是`dispatcherServlet`

`web.xml`

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
      <display-name>SSM</display-name>
      
      <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:springmvc-servlet.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>
    </web-app>

配置文件同上，可以放在任意文件夹，只要你找到的。