Java开发网 - 请帮忙看看这个简单的spring程序是什么问题?

Topic: 请帮忙看看这个简单的spring程序是什么问题?

1.请帮忙看看这个简单的spring程序是什么问题?

Posted by: benbon
Posted on: 2006-03-17 14:57

错误如下:
exception

javax.servlet.ServletException: Error instantiating servlet class net.testSpring.servlet.MainServlet
  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
  org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
  org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
  org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
  org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
  org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
  java.lang.Thread.run(Thread.java:595)

root cause

java.lang.NoClassDefFoundError: org/springframework/context/support/AbstractApplicationContext
  java.lang.Class.getDeclaredConstructors0(Native Method)
  java.lang.Class.privateGetDeclaredConstructors(Class.java:2328)
  java.lang.Class.getConstructor0(Class.java:2640)
  java.lang.Class.newInstance0(Class.java:321)
  java.lang.Class.newInstance(Class.java:303)
  org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
  org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
  org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
  org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
  org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
  org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
  java.lang.Thread.run(Thread.java:595)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

程序:
package net.testSpring.sys;

import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class AppContext {
  private static AppContext instance;

  private AbstractApplicationContext appContext;

  public synchronized static AppContext getInstance() {
    if (instance == null) {
      instance = new AppContext();
    }
    return instance;
  }

private AppContext() {
    try{
    this.appContext = new ClassPathXmlApplicationContext(
        "/applicationContext.xml");
    }catch(Exception e){
      System.out.println(e.getMessage());
    }
    if(appContext!=null)
      System.out.println("get AppContext success!");
  }  public AbstractApplicationContext getAppContext() {
    return appContext;
  }
}
-----------------------------------------------------------------------------------------
package net.testSpring.servlet;

import java.io.IOException;

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

import net.testSpring.beans.TestBean;
import net.testSpring.sys.AppContext;

import org.springframework.context.ApplicationContext;

public class MainServlet extends HttpServlet {

  /**
   *
   */
  private static final long serialVersionUID = 1L;

  /**
   * The doGet method of the servlet. <br>
   *
   * This method is called when a form has its tag value method equals to get.
   *
   * @param request
   * the request send by the client to the server
   * @param response
   * the response send by the server to the client
   * @throws ServletException
   * if an error occurred
   * @throws IOException
   * if an error occurred
   */
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    doPost(request, response);
  }

  /**
   * The doPost method of the servlet. <br>
   *
   * This method is called when a form has its tag value method equals to
   * post.
   *
   * @param request
   * the request send by the client to the server
   * @param response
   * the response send by the server to the client
   * @throws ServletException
   * if an error occurred
   * @throws IOException
   * if an error occurred
   */
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType("text/html;charset=gb2312");
    try {
      ApplicationContext ac = AppContext.getInstance().getAppContext();
      TestBean tb = (TestBean) ac.getBean("test");
      String vs_text = tb.getContent();
      System.out.println(vs_text);
    } catch (Exception e) {
      e.printStackTrace();
    }
    System.out.println("hello");

  }

}
----------------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
  <bean id="test" class="net.testSpring.beans.TestBean">
    <property name="vs_test"><value>Hello World</value></property>
</bean>
</beans>
------------------------------------------------------------
applicationContext.xml放在web-inf/classes下面

2.Re:请帮忙看看这个简单的spring程序是什么问题? [Re: benbon]	Copy to clipboard
Posted by: zcjl Posted on: 2006-03-17 16:00 java.lang.NoClassDefFoundError: org/springframework/context/support/AbstractApplicationContext classpath中不存在这个类建议把spring.jar或者spring-context.jar加入到classpath中

3.Re:请帮忙看看这个简单的spring程序是什么问题? [Re: benbon]	Copy to clipboard
Posted by: benbon Posted on: 2006-03-17 16:51 不可能吧,我是用myeclipse做的,所有的包都导入了

4.Re:请帮忙看看这个简单的spring程序是什么问题? [Re: benbon]	Copy to clipboard
Posted by: floater Posted on: 2006-03-17 22:52 benbon wrote: 不可能吧,我是用myeclipse做的,所有的包都导入了 why not possible? In this world, anything is possible, . That's what the msg says. There are many possible reasons, missing jar files, corrupted jar files, classloader issues, wrong version of jars, to name a few.

5.Re:请帮忙看看这个简单的spring程序是什么问题? [Re: floater]	Copy to clipboard
Posted by: bluepure Posted on: 2006-03-18 18:48 myeclipse的包导入有两种方式，一种是类似环境变量，一种是把所有jar复制到webapp的lib文件夹下面。你选择的是第一种方式，因此在web方式下运行就找不到库文件了。看我的抓图，要选择下面那个copy：

6.Re:请帮忙看看这个简单的spring程序是什么问题? [Re: benbon]	Copy to clipboard
Posted by: rockykid Posted on: 2006-05-21 15:23 那顺便问一下楼上大虾，第一种方式如何用 ?谢谢!