java - eclipse spring mvc 项目中 servlet 不可用错误

Question

我正在使用 eclipse 运行该项目。在一个项目中我收到以下错误

18/02/2011 12:23:41 AM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\java\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\java\bin;C:\Program Files (x86)\MySQL\MySQL Server 5.1\bin;C:\Program Files (x86)\IDM Computer Solutions\UltraEdit\;C:\java\bin 18/02/2011 12:23:42 AM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:test' did not find a matching property. 18/02/2011 12:23:42 AM org.apache.coyote.AbstractProtocolHandler init INFO: Initializing ProtocolHandler ["http-bio-8085"] 18/02/2011 12:23:42 AM org.apache.coyote.AbstractProtocolHandler init INFO: Initializing ProtocolHandler ["ajp-bio-8009"] 18/02/2011 12:23:42 AM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 511 ms 18/02/2011 12:23:42 AM org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina 18/02/2011 12:23:42 AM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.8 18/02/2011 12:23:42 AM org.apache.catalina.core.ApplicationContext log INFO: Marking servlet ds as unavailable 18/02/2011 12:23:42 AM org.apache.catalina.core.StandardContext loadOnStartup SEVERE: Servlet /test threw load() exception java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1048) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:996) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4834) at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5155) at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5150) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) 18/02/2011 12:23:42 AM org.apache.coyote.AbstractProtocolHandler start INFO: Starting ProtocolHandler ["http-bio-8085"] 18/02/2011 12:23:42 AM org.apache.coyote.AbstractProtocolHandler start INFO: Starting ProtocolHandler ["ajp-bio-8009"] 18/02/2011 12:23:42 AM org.apache.catalina.startup.Catalina start INFO: Server startup in 332 ms 18/02/2011 12:23:52 AM org.apache.catalina.core.StandardWrapperValve invoke INFO: Servlet ds is currently unavailable

我的 ds.servlet 是

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.orf/schema/beans/spring-beans-2.0.xsd">

    <!-- Configuring DataSource -->
    <bean id="datasource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName">
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property name="url">
            <value>jdbc:mysql://localhost:3306/springdb</value>
        </property>
        <property name="username">
            <value>root</value>
        </property>
        <property name="password">
            <value>root</value>
        </property>
    </bean>


    <!-- Configuring jdbcTemplate -->
    <bean id="jdbctemp" class="org.springframework.jdbc.core.JdbcTemplate">
        <constructor-arg>
            <ref local="datasource" />
        </constructor-arg>
    </bean>

    <bean id="loginModel" class="com.santosh.spring.LoginModel">
        <constructor-arg>
            <ref local="jdbctemp" />
        </constructor-arg>
    </bean>

    <bean id="logincnt" class="com.santosh.spring.LoginController">
        <property name="loginModel" >
            <ref local="loginModel"/>
        </property>

        <!-- Configure Command ClassName  -->

        <property name="commandClass" >
        <value type="java.lang.Class"> com.santosh.spring.UserDetails </value>
        </property>

        <!-- Configure the command name , the name to use when binding the instantiated command class to the request -->

        <property name="commandName">
            <value> UserDetails </value>
        </property>

    </bean>


    <!-- Configure URL Mapping   -->

    <bean id="myurlmapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping" >
        <property name="mappings">
            <props>
                <prop key="/login.spring">logincnt</prop>
            </props>
        </property>
        <property name="urlMap">
<map>
<entry key="/hello.springs">
<ref bean="helloController"/>
</entry>
</map>
</property>
    </bean>
    <bean id="helloController" class="net.roseindia.web.HelloWorldController"> </bean>

</beans>

Answer 1

戴夫是对的。然而，Tomcat 存在一些热部署问题，因此有时无法加载类路径中实际存在的类。因此，如果您发现 jar 确实位于正确的位置，则只需清理 tomcat(右键单击服务器并选择清理)，然后重新启动即可。