SpringMVC springmvc.xml配置路徑前綴和后綴

web.xml

<?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">
    <!-- 學習前置條件 -->
    <!-- 問題1：web.xml中servelet、filter、listener、context-param加載順序 -->
    <!-- 問題2：load-on-startup標簽的作用，影響了Servlet對象創建的時機 -->
    <!-- 問題3：url-pattern:標簽的配置方式有四種：/dispatcherServlet、/servlet/*、*.do、/ 以上四種配置-->
    <!-- 問題4：url-pattern標簽的配置為什么配置/就不攔截jsp請求，而配置/*，就會攔截jsp請求 -->
    <!-- 問題4原因：標簽配置為/*報錯，因為它攔截了jsp請求，但是又不能處理jsp請求。 -->
    <!-- 問題5：配置了springmvc去讀取spring配置文件之后，就產生了spring父子容器的問題 -->
    
    <!-- 配置前端控制器 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 設置spring配置文件路徑 -->
        <!-- 如果不設置初始化參數，那么DispatcherServlet會讀取默認路徑下的配置文件 -->
        <!-- 默認配置文件路徑：/WEB-INF/springmvc-servlet.xml -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!-- 指定初始化時機，設置為2，表示Tomcat啟動時，它會跟隨着啟動，DispatcherServlet會跟隨着初始化 -->
        <!-- 如果沒有指定初始化時機，DispatcherServlet就會在第一次被請求的時候，才會初始化，而且只會被初始化一次(單例模式) -->
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <!-- url-pattern的設置 -->
        <!-- 不要配置為/*，否則報錯 -->
        <!-- 通俗解釋：會攔截整個項目中的資源訪問，包含JSP和靜態資源的訪問,對於JS的訪問，springmvc提供了默認Handler處理器 -->
        <!-- 但是對於JSP來講，springmvc沒有提供默認的處理器，我們也沒有手動編寫對應的處理器，此時按照springmvc的處理流程分析得知，它down了 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

springmvc.xml

<?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">
    <!-- 處理器類的掃描 -->
    <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>

pom.xml

<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組件需要的依賴包 -->
        <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>

        <!-- 基於AspectJ的aop依賴 -->
        <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依賴包 -->
        <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編譯級別 -->
            <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依賴包 -->
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
            </plugin>
        </plugins>
    </build>
</project>

項目案例

鏈接: https://pan.baidu.com/s/1kzcrGlmhWzZeWuJ2FmLriA  密碼: g64h