创建一个SpringMVC小项目

导包

/springMVC/WebContent/WEB-INF/lib/commons-logging-1.1.3.jar
/springMVC/WebContent/WEB-INF/lib/spring-aop-4.3.7.RELEASE.jar
/springMVC/WebContent/WEB-INF/lib/spring-beans-4.3.7.RELEASE.jar
/springMVC/WebContent/WEB-INF/lib/spring-context-4.3.7.RELEASE.jar
/springMVC/WebContent/WEB-INF/lib/spring-core-4.3.7.RELEASE.jar
/springMVC/WebContent/WEB-INF/lib/spring-expression-4.3.7.RELEASE.jar
/springMVC/WebContent/WEB-INF/lib/spring-web-4.3.7.RELEASE.jar
/springMVC/WebContent/WEB-INF/lib/spring-webmvc-4.3.7.RELEASE.jar

2 配置web.xml文件

 <!-- web.xml配置核心springMVC的Servlet分发器
  The front controller of this Spring Web application, responsible for handling all application requests -->
 <servlet>
  <servlet-name>springDispatcherServlet</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>

 <!-- Map all requests to the DispatcherServlet for handling -->
 <servlet-mapping>
  <servlet-name>springDispatcherServlet</servlet-name>
  <url-pattern>/</url-pattern>
 </servlet-mapping>
  
  <!--这里是区分method的过滤器  -->
  <filter>
    <filter-name>methodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
     <filter-name>methodFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

这里需要注意：

Servlet分发器的url-pattern是/，而不是/*。原因在于优先级 /* > .jsp > / ，所以如果url-pattern是/*，则任意请求都要进入Servlet分发器，而请求可能只是访问index.jsp页面，不需要经过Servlet分发器处理。

如果没有用参数来说明springMVC配置文件的路径，采用默认配置的话，则默认路径是 /WEB-INF/<servlet-name>-servlet.xml

例如在WEB-INF文件夹下面有个springDispatcherServlet-servlet.xml，这样也可以找到。

3 配合springMVC核心文件

<?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:context="http://www.springframework.org/schema/context"
 xmlns:mvc="http://www.springframework.org/schema/mvc"
 xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
  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-4.3.xsd">
 <context:component-scan base-package="com.anseon.controller"/>
 <!--配置视图解析器   -->
 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="prefix" value="/WEB-INF/views/"/>
  <property name="suffix" value=".jsp"/>
 </bean>
</beans>

4 在代码中配置Controller的RequestMapping，请求路径的映射

@Controller
@RequestMapping("/springmvc")
public class Hello {
    private static final String SUCCESS = "success";
    /**
     * 最终的视图:
     *     prefix+returnValue+suffix
     *     /WEB-INF/views/success.jsp
     */
    @RequestMapping("/hello")
    public String execute(){
        System.out.println("execute");
        return SUCCESS;
    }
}

访问http://localhost:8080/springmvc01/index.jsp

然后执行操作之后返回的是/WEB-INF/views文件夹下的success.jsp页面。

问题：跳转到success.jsp页面的时候是重定向还是转发？