Spring MVC helloWorld中遇到的问题及解决办法

1、java.io.FileNotFoundException: Could not open ServletContext resource
不能加载ServletContext的用法是配置到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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 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>SpringMVCLesson</display-name>

<servlet>
<servlet-name>SpringMVCLesson</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springservlet-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup><!-- load-on-startup必须放在最后 -->
</servlet>
<!-- Spring MVC配置文件结束 -->

<servlet-mapping>
<servlet-name>SpringMVCLesson</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

</web-app>

解决办法：
更改xml名字为 {ServletContext}-servlet.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="2.4"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <!--<start id="servlet_DispatcherServlet"/>-->
<servlet>
<servlet-name>SpringMVCLesson</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!--<end id="servlet_DispatcherServlet"/>-->

<servlet-mapping>
<servlet-name>SpringMVCLesson</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

</web-app>

位置仍为/WEB-INF/下

2、org.springframework.web.servlet.DispatcherServlet noHandlerFound
解决办法：
SpringMVCLesson-servlet.xml增加

<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>

这个工程中还有个特殊问题是Source Folder设置错误导致java没有生成class文件

3、其它xml:xsi没有配置正确导致配置的元素没有被识别而报错

<?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:util="http://www.springframework.org/schema/util"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--<start id="spring_component_scan" />-->
<context:component-scan base-package="com.demo.web.controllers" />
<!--<end id="spring_component_scan" />-->

<!--<start id="mvc_annotatedcontrollers" />-->
<mvc:annotation-driven/>
<!--<end id="mvc_annotatedcontrollers" />-->

<!--<start id="mvc_resources"/>-->
<mvc:resources mapping="/resources/**" location="/resources/" />
<!--<end id="mvc_resources"/>-->

</beans>

4、Spring中CoC(Convention over Configration)约定优于配置的理解又加深了