ssm项目在tomcat部署成功，运行却报404错误，把所有文件复制到一个新的项目却能运行，后来又开始404，求解！配置xml如下：
web.xml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/j2ee" xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:springmvc-servlet.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>userlogin.jsp</welcome-file> </welcome-file-list> </web-app> applicationContext.xml配置：
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 加载classpath下的db.properties文件 -->
<!-- <context:property-placeholder location="db.properties" /> -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<!--<property name="location" value="classpath:jdbc.properties" /> -->
<property name="locations">
<list>
<!-- 属性文件加载列表 -->
<value>classpath:db.properties</value>
</list>
</property>
</bean>
<!--第一步： 配置dataSource -->
<bean id="dataSource" class="${dataSource}" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${maxWait}"></property>
</bean>
<!--第二步：配置sqlSessionFactory，SqlSessionFactoryBean是用来产生sqlSessionFactory的 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 加载数据源，使用上面配置好的数据源 -->
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/mo/ssm/mapper/*.xml"></property>
</bean>
<!--配置mybatis接口代理开发 ： 1、接口类名和映射文件必须同名 2、接口类和映射文件必须在同一个目录下 3、 映射文件namespace名字必须是接口的全类路径名
4、接口的方法名必须和映射Statement的id一致 -->
<!-- 扫描DAO组件 -->
<!-- MapperScannerConfigurer可以扫描指定包下的 指定接口，然后自动的实现这些接口。 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 指定扫描的包名 -->
<property name="basePackage" value="com.mo.ssm.mapper" />
<!-- 通过注解来指定扫描的接口，即当配置了该 注解以后，MapperScannerConfigurer会扫描 包下带有该注解的接口。 该注解需要自定义，当配置它时会扫描带有
注解的接口，不配置时会扫描所有的接口。 -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<!-- 开启IOC注解扫描 属于spring范围 -->
<context:component-scan base-package="com.mo.ssm.*" />
<!-- 第三步：配置事务管理 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 配置通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="append*" propagation="REQUIRED" />
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="modify*" propagation="REQUIRED" />
<tx:method name="edit*" propagation="REQUIRED" />
<tx:method name="delete*" propagation="REQUIRED" />
<tx:method name="remove*" propagation="REQUIRED" />
<tx:method name="repair" propagation="REQUIRED" />
<tx:method name="delAndRepair" propagation="REQUIRED" />
<tx:method name="get*" propagation="SUPPORTS" />
<tx:method name="find*" propagation="SUPPORTS" />
<tx:method name="load*" propagation="SUPPORTS" />
<tx:method name="search*" propagation="SUPPORTS" />
<tx:method name="datagrid*" propagation="SUPPORTS" />
<tx:method name="*" propagation="SUPPORTS" />
</tx:attributes>
</tx:advice>
<!-- 配置拦截service -->
<aop:config>
<aop:advisor advice-ref="txAdvice"
pointcut="execution(* com.mo.ssm.service.*.*(..))" />
</aop:config>
</beans>
springmvc-servlet.xml配置：
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<!-- 注解方式 -->
<mvc:annotation-driven />
<!-- 文件扫描 -->
<context:component-scan base-package="com.mo.ssm.controller"></context:component-scan>
<!-- annotation-driven:默认创建了多个对象：RequestMappingHandlerMapping，RequestMappingHandlerAdapter
也就提供对json格式支持
-->
<mvc:annotation-driven/>
<!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
jsp登录页面：
<body>
登录首页<br>
<form action="login" method="get">
用户名<input id="username" type="text"/><br/>
密码<input id="password" type="password"/><br/>
<input id="loginsubmit" type="submit" value="登录"/>
<input type="reset" value="重置"><br/>
</form>
</body>
controller页面：
package com.mo.ssm.controller;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.mo.ssm.entity.Rtuusertab;
import com.mo.ssm.service.RtuusertabService;
@Controller
public class RtuusertabController {
@Resource
private RtuusertabService rService;
@RequestMapping(value="/login.do",method=RequestMethod.GET)
public ModelAndView login(String username,String password) {
Rtuusertab rtuusertab=rService.findNameAndPass(username, password);
if (null!=rtuusertab) {
ModelAndView mView=new ModelAndView("list");
return mView;
}
return new ModelAndView("userlogin");
}
}