搭建maven環(huán)境

項目框架視圖

配置Spring applicationContext.xml

ssm框架思路是由Spring框架作為基干,整合SpringMVC和Mybatis,首先就是要寫Spring的配置文件

• 開啟spring注解掃描 <context:component-scan base-package="">
• 不掃描controller注解 交給SpringMVC處理

<?xml version="1.0" encoding="UTF-8"?>
<!--約束-->
<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"
       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.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx.xsd
            ">

<!--    開啟spring注解的掃描 controller 不需要掃描-->
    <context:component-scan base-package="cn.cai">
<!--    將controller層交給 springmvc掃描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

測試可用后再進行springmvc的配置

配置SpringMVC

配置web.xml

• 先在web.xml中配置dispatcherServlet 前置控制器 攔截所有客戶端頁面的請求
• 配置characterEncodingFilter springmvc的字符編碼過濾器

<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.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
</servlet-mapping>

<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>
</filter>
<filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
</filter-mapping>

配置springmvc.xml

• 開啟掃描 只掃描org.springframework.stereotype.Controller下的注解
• 配置視圖解析器internalResourceViewResolver 配置視圖的資源路徑以及轉(zhuǎn)到什么類型的文件
• 將dispatcherServlet攔截的靜態(tài)資源放行
• 開啟mvc注釋支持

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">

    <!--開啟掃描器 掃描controller標簽-->
    <context:component-scan base-package="cn.cai..controller">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--開啟視圖解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/views/"/>
        <property name="suffix" value=".jsp" />
    </bean>

    <!--靜態(tài)資源放行-->
    <mvc:resources location="/resources/images/" mapping="/resources/images/**"/>
    <mvc:resources location="/resources/css/" mapping="/resources/css/**"/>
    <mvc:resources location="/resources/js/" mapping="/resources/js/**"/>

    <!--開啟mvc注解支持-->
    <mvc:annotation-driven/>
</beans>

測試mvc可用后進行下一步配置

開啟spring監(jiān)聽器

tomcat開啟后會通過web.xml讀取springmvc的配置文件
可是spring的配置文件雖然寫完了 卻讀取不了 于是配置一個監(jiān)聽器 寫在web.xml中 在tomcat啟動時讀取spring的配置文件
spring自己寫了一個監(jiān)聽類 繼承自ServletContextListener 生命周期與tomcat一致
org.springframework.web.context.ContextLoaderListener

<!--    spring監(jiān)聽器 只會加載WEB/INF下的applicationContext.xml 需要另外配置 配置文件路徑-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
<!--    配置了spring的配置文件-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

整個流程

1. 配置spring 關(guān)閉對controller的掃描 交由springmvc處理
2. 配置springmvc
   2.1 配置DispatcherServlet 前置控制器(web.xml)
   2.2 配置CharacterEncodingFilter 字符編碼過濾器 (web.xml)
   2.3 開啟掃描(springmvc.xml)
   2.4 配置InternalResourceViewResolver視圖解析器(springmvc.xml)
   2.5 放行前端控制器攔截的靜態(tài)資源(springmvc.xml)
   2.6 開啟springmvc注解的支持(springmvc.xml)
3. 配置ContextLoaderListener監(jiān)聽器 (web.xml)