标签:启动 web down port can expr 流程分析 hot spring
<?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" version="2.5"> <!-- 学习前置条件 --> <!-- 问题1:web.xml中servelet、filter、listener、context-param加载顺序 --> <!-- 问题2:load-on-startup标签的作用,影响了Servlet对象创建的时机 --> <!-- 问题3:url-pattern:标签的配置方式有四种:/dispatcherServlet、/servlet/*、*.do、/ 以上四种配置--> <!-- 问题4:url-pattern标签的配置为什么配置/就不拦截jsp请求,而配置/*,就会拦截jsp请求 --> <!-- 问题4原因:标签配置为/*报错,因为它拦截了jsp请求,但是又不能处理jsp请求。 --> <!-- 问题5:配置了springmvc去读取spring配置文件之后,就产生了spring父子容器的问题 --> <!-- 配置前端控制器 --> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 设置spring配置文件路径 --> <!-- 如果不设置初始化参数,那么DispatcherServlet会读取默认路径下的配置文件 --> <!-- 默认配置文件路径:/WEB-INF/springmvc-servlet.xml --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <!-- 指定初始化时机,设置为2,表示Tomcat启动时,它会跟随着启动,DispatcherServlet会跟随着初始化 --> <!-- 如果没有指定初始化时机,DispatcherServlet就会在第一次被请求的时候,才会初始化,而且只会被初始化一次(单例模式) --> <load-on-startup>2</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <!-- url-pattern的设置 --> <!-- 不要配置为/*,否则报错 --> <!-- 通俗解释:会拦截整个项目中的资源访问,包含JSP和静态资源的访问,对于JS的访问,springmvc提供了默认Handler处理器 --> <!-- 但是对于JSP来讲,springmvc没有提供默认的处理器,我们也没有手动编写对应的处理器,此时按照springmvc的处理流程分析得知,它down了 --> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!-- 处理器类的扫描 --> <context:component-scan base-package="com.cyb.springmvc.controller"></context:component-scan> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.cyb</groupId> <artifactId>springmvc-demo01</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <!-- spring ioc组件需要的依赖包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>5.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>5.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>5.2.1.RELEASE</version> </dependency> <!-- 基于AspectJ的aop依赖 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>5.2.1.RELEASE</version> </dependency> <dependency> <groupId>aopalliance</groupId> <artifactId>aopalliance</artifactId> <version>1.0</version> </dependency> <!-- spring MVC依赖包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>5.2.1.RELEASE</version> </dependency> <!-- jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <!-- 配置Maven的JDK编译级别 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.2</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <port>8080</port> </configuration> </plugin> <!-- tomcat依赖包 --> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> </plugin> </plugins> </build> </project>
链接: https://pan.baidu.com/s/1kzcrGlmhWzZeWuJ2FmLriA 密码: g64h
SpringMVC springmvc.xml配置路径前缀和后缀
标签:启动 web down port can expr 流程分析 hot spring
原文地址:https://www.cnblogs.com/chenyanbin/p/12996899.html