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Spring Mvc 配置

想要熟练的掌握Spring Mvc 配置,还是需要了解其运行原理。在java web里 Http请求最终都是Servlet来处理的,Spring Mvc 就是通过注册一个Servlet分发器来拦截http请求,然后进入到Srping Mvc框架进行处理,所以配置的第一步就是配置这个Servlet分发器。

一、在web.xml配置配置Servlet分发器和处理中文乱码的过滤器

<?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_3_0.xsd"
id="WebApp_ID" version="3.0">
  <display-name>SpringMvc</display-name>

  <!-- 处理中文乱码,只对POST请求有效 -->
  <filter>
    <filter-name>myEncoding</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>
  <init-param>
    <param-name>forceEncoding</param-name>
    <param-value>true</param-value>
  </init-param>
  </filter>
  <filter-mapping>
    <filter-name>myEncoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- Spring MVC Servlet 分发器配置 -->
  <servlet>
     <servlet-name>spring</servlet-name>
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     <init-param>
     <param-name>contextConfigLocation</param-name>
     <param-value>/WEB-INF/spring-servlet.xml</param-value>
     </init-param>
     <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

二、配置spring-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<?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:p="http://www.springframework.org/schema/p"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
               http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
               http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
                 http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">

  <!--注解说明 -->
  <mvc:annotation-driven />
  <!-- 配置静态资源 -->
  <mvc:resources mapping="/script/**" location="/script/" />
  <mvc:resources mapping="/css/**" location="/css/" />

  <!-- 如果当前请求为“/”时,则转发到“/helloworld/index” -->
  <mvc:view-controller path="/" view-name="forward:/home/index"/>

  <!-- 启用spring mvc 注解 -->
  <context:annotation-config />

  <!-- 把标记了@Controller注解的类转换为bean -->
  <context:component-scan base-package="controller" use-default-filters="false">
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
  </context:component-scan>

  <!-- 使用jsp作为视图 -->
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass">
      <value>org.springframework.web.servlet.view.JstlView</value>
    </property>
    <property name="prefix" value="http://www.mamicode.com/jsp/"></property>
    <property name="suffix" value="http://www.mamicode.com/.jsp"></property>
  </bean>

  <!-- 异常处理 -->
  <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    <property name="defaultErrorView" value="http://www.mamicode.com/error/exception" />
    <!-- 定义异常处理页面用来获取异常信息的变量名,默认名为exception -->
    <property name="exceptionAttribute" value="http://www.mamicode.com/ex"></property>
    <property name="exceptionMappings">
      <props>
        <prop key="java.io.IOException">error/ioexception</prop>
      </props>
    </property>
  </bean>

</beans>  

这样配置后,Spring Mvc就可以跑起来了^_^