Question

我是春天新手。刚刚完成核心和j2ee并启动了MVC但是我收到了这个错误。有人可以帮助我纠正这个问题。提前致谢

这是我的web.xml文件

的web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
    http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">

  <display-name>MVC_HelloWorld1</display-name>

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

  <servlet>
    <servlet-name>helloWorld</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>helloWorld</servlet-name>
    <url-pattern>*.ds</url-pattern>
  </servlet-mapping>
</web-app>

此页面正在显示，但是当我尝试单击提交按钮时，我将获得bean创建异常。

的index.jsp

 <form action="./hello.ds" >

    Name: <input type="text" name="name">
    <input type="submit" value="sayHello">
 </form>

helloWorld-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   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">

 <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
  <bean name="/hello.ds"  class="/MVC_HelloWorld1/src/controller/HelloController"/>
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prifix" value="/"></property>
    <property name="suffix" value=".jsp"></property>
  </bean>
</beans>

我不确定，但我认为问题出在这个HelloController上。

HelloController.java

package controller;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class HelloController implements Controller {
@Override
    public ModelAndView handleRequest(HttpServletRequest req, HttpServletResponse res) throws Exception {
        String name=req.getParameter("name");
        Map m=new HashMap();
        m.put("msg","hello..."+name);
        ModelAndView mav=new ModelAndView("success",m);
        return mav;     
    }
}

的success.jsp

${msg}

堆栈追踪：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping#0' defined in ServletContext resource [/WEB-INF/helloWorld-servlet.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [/MVC_HelloWorld1/src/controller/HelloController] for bean with name 'd' defined in ServletContext resource [/WEB-INF/helloWorld-servlet.xml]; nested exception is java.lang.ClassNotFoundException: /MVC_HelloWorld1/src/controller/HelloController
Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [/MVC_HelloWorld1/src/controller/HelloController] for bean with name 'd' defined in ServletContext resource [/WEB-INF/helloWorld-servlet.xml]; nested exception is java.lang.ClassNotFoundException: /MVC_HelloWorld1/src/controller/HelloController
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:443)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:459)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:340)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:307)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127)
    javax.servlet.GenericServlet.init(GenericServlet.java:158)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Thread.java:745)

Answer 1

尝试在helloWorld-servlet.xml中修复以下部分。 bean的类名应为controller.HelloController。你的bean属性中有一个拼写错误，它应该是prefix。

...
<bean name="/hello.ds"  class="controller.HelloController"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/"></property>
    <property name="suffix" value=".jsp"></property>
</bean>
...

Answer 2

看起来helloWorld-servlet.xml中存在问题。尝试用class替换class =“/ MVC_HelloWorld1 / src / controller / HelloController” 类= “控制器/ HelloController中”。

org.springframework.beans.factory.BeanCreationException :(未找到类exceptionnn）

2 个答案: