spring整合web项目

清疚 2023-10-09 10:49 10阅读 0赞

Web项目如何初始化SpringIOC容器 ：思路：当服务启动时（tomcat），通过监听器将SpringIOC容器初始化一次（该监听器 spring-web.jar已经提供），web项目启动时 ，会自动加载web.xml，因此需要在web.xml中加载 监听器（ioc容器初始化）。所谓的ioc容器其实相当于applicationContext.xml配置文件，把所有被ioc管理的对象放入其中，放入bean标签里，当做对象管理！！！

<context-param>
              
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath:applicationContext.xml</param-value>
      </context-param>  
      <listener>
          
          <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>

实例：

<?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_3_0.xsd"
        version="3.0">
        <display-name>crm-test</display-name>
        <welcome-file-list>
            <welcome-file>index.html</welcome-file>
            <welcome-file>index.htm</welcome-file>
            <welcome-file>index.jsp</welcome-file>
            <welcome-file>default.html</welcome-file>
            <welcome-file>default.htm</welcome-file>
            <welcome-file>default.jsp</welcome-file>
        </welcome-file-list>
    
        
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                classpath:spring_dao.xml
                classpath:spring_service.xml
        </param-value>
        </context-param>
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
    
        
        <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>
            <init-param>
                <param-name>forceEncoding</param-name>
                <param-value>true</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>CharacterEncodingFilter</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:spring-web-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>
        
        
        <servlet>
            <servlet-name>DisplayChart</servlet-name>
            <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
        </servlet>
    
        <servlet-mapping>
            <servlet-name>DisplayChart</servlet-name>
            <url-pattern>/chart</url-pattern>
        </servlet-mapping> 
        
    </web-app>

转载于:https://www.cnblogs.com/wskb/p/11507620.html