本筆記做于 尚硅谷佟剛老師的springmvc4.x視頻

步驟：

1. 導入Jar包

Paste_Image.png

2. 在web.xml中配置DispatcherServlet
3. 加入springmvc的配置文件
4. 編寫處理請求的servlet并標識為指定處理器
5. 編寫視圖文件

案例:

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" id="WebApp_ID" version="2.5">
  
 
    <!-- 配置轉發器 -->
    <servlet>
        <servlet-name>springDispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        
        <init-param>
            <!--設置srpingmvc.xml文件路徑 -->
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Map all requests to the DispatcherServlet for handling -->
    <servlet-mapping>
        <servlet-name>springDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

src下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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">

    <!-- 開啟注解掃描 -->
    <context:component-scan base-package="com.xxjqr.handlers"></context:component-scan>
    
    <!-- 配置視圖解析器：把處理器返回的值解析為視圖路徑 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!-- 比如處理器傳回來"success",那么拼接后路徑為：
    /WEB-INF/views/success.jsp -->
</beans>

類

//實例化該控制器
@Controller
@RequestMapping("/springmvc")
public class HelloWorld {
    
    /* 請求映射：
     * 如果類上有@RequestMapping,那么請求路徑是：項目/a+b 
     * 如果類上沒有@RequestMapping，那么請求路徑是：項目/b
     * */
    @RequestMapping("/helloworld")
    public String hello(){
        System.out.println("到了處理器了");
        return "success";
    }
}

視圖

//index.jsp
<a href="helloworld">HelloWord</a><!--提交路徑不要以/開頭-->

//WEB-INF/views.success.jsp
成功了