Spring MVC 的核心是DispatherServlet，DispatherServlet将请求发送给控制器，处理器映射根据请求URL进行决策。
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DispatherServlet必须在web.xml文件中配置。
<?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"
version="3.0">
<display-name>wi11iamWechat</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:spring-*.xml</param-value>
</context-param>
<listener>
<description>spring监听器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<filter>
<description>防止XXS和SQL等攻击</description>
<filter-name>defenseAttackFilter</filter-name>
<filter-class> com.wi11iam.utils.DefenseAttackFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>defenseAttackFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<description>字符集过滤器</description>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<description>字符集编码</description>
<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>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<description>spring mvc servlet</description>
<servlet-name>springMvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<description>spring mvc 配置文件</description>
<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>springMvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<filter>
<filter-name>sitemesh3</filter-name>
<filter-class>org.sitemesh.config.ConfigurableSiteMeshFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>sitemesh3</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>/</welcome-file>
</welcome-file-list>
<!-- <error-page>
<error-code>404</error-code>
<location>/WEB-INF/views/error/404.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/WEB-INF/views/error/404.jsp</location>
</error-page> -->
</web-app>
<servlet>
<description>spring mvc servlet</description>
<servlet-name>springMvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<description>spring mvc 配置文件</description>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springMVC.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
tomcat 启动先加载web.xml 在web.xml 找到DispatherServlet加载 spring MVC的配置文件加载
<listener>
<description>spring监听器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
ContextLoaderListener加载其他的context-param中的配置文件
<servlet-mapping>
<servlet-name>springMvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
将所有的url请求都拦截到DispatherServlet处理（包括静态资源css img 文件）
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 -->
<context:component-scan base-package="com.wi11iam.wechat.controller" />
<mvc:annotation-driven />
<mvc:resources mapping="/css/**" location="/css/" />
<mvc:resources mapping="/images/**" location="/images/" />
<mvc:resources mapping="/js/**" location="/js/" />
<mvc:resources mapping="/MP_verify_YPbgNxZ8JlmnNEqq.txt" location="/mp/" />
<mvc:interceptors>
<!-- 使用bean定义一个Interceptor，直接定义在mvc:interceptors根下面的Interceptor将拦截所有的请求 -->
<mvc:interceptor>
<mvc:mapping path="/account/**" />
<mvc:mapping path="/invest/**" />
<mvc:mapping path="/pay/**" />
<mvc:mapping path="/loginAndRegister/index" />
<mvc:exclude-mapping path="/pay/llPayNotify" />
<!-- 需排除拦截的地址 -->
<mvc:exclude-mapping path="/invest/invest/*" />
<mvc:exclude-mapping path="/invest/viewBidInvestRecords" />
<mvc:exclude-mapping path="/pay/checkBank" />
<mvc:exclude-mapping path="/pay/checkIdNoExists" />
<mvc:exclude-mapping path="/integralParadise/exchangeGoodsAttr" />
<!-- 定义在mvc:interceptor下面的表示是对特定的请求才进行拦截的 -->
<bean class="com.hengxin.wi11iam.interceptor.LoginInterceptor" />
</mvc:interceptor>
</mvc:interceptors>
<!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/views/" p:suffix=".jsp" />
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver"
p:defaultEncoding="utf-8" p:maxUploadSize="52428880"
p:maxInMemorySize="4096" />
</beans>
使用<mvc:resources >建立一个服务于静态资源的处理器 不去走DispatherServlet
<mvc:resources mapping="/css/**" location="/css/" />
from的model可以添加注解的校验
@Length(min = 6,max = 20)
@NotEmpty
private String confirmPassword;
