Question

**编辑：我复制粘贴另一个**

我只是想实现Spring HelloWorld示例。我的Spring版本是4.5，jdk 5.1 我试图在没有maven的情况下进行，只需在eclipse中导入spring JAR

我的主要课程（Student.java）

package com.javatpoint;  

public class Student {  
private String name;  

public String getName() {  
    return name;  
}  

public void setName(String name) {  
    this.name = name;  
}  

public void displayInfo(){  
    System.out.println("Hello: "+name);  
}  
}

我的spring.xml

  <?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:p="http://www.springframework.org/schema/p"  
xsi:schemaLocation="http://www.springframework.org/schema/beans  
           http://www.springframework.org/schema/beans/spring-beans-
3.0.xsd">  

 <bean id="studentbean" class="com.javatpoint.Student">  
 <property name="name" value="Vimal Jaiswal"></property>

3.Test.java

         package com.javatpoint;  

import org.springframework.beans.factory.BeanFactory;  
import org.springframework.beans.factory.xml.XmlBeanFactory;  
import org.springframework.core.io.ClassPathResource;  
import org.springframework.core.io.Resource;  

import com.javatpoint.Student;

public class Test {  
public static void main(String[] args) {  
    Resource resource=new ClassPathResource("applicationContext.xml");  
    BeanFactory factory=new XmlBeanFactory(resource);  

    Student student=(Student)factory.getBean("studentbean");  
    student.displayInfo();  
}  
}

仍然是在＆＃34;线程中的例外＆＃34;主要＆＃34; java.lang.NoClassDefFoundError＆＃34;

是我缺少的东西，我需要与maven集成吗？请建议

这是我的错误堆栈

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.<init>(DefaultSingletonBeanRegistry.java:83)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.<init>(FactoryBeanRegistrySupport.java:43)
    at org.springframework.beans.factory.support.AbstractBeanFactory.<init>(AbstractBeanFactory.java:175)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:160)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:171)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.<init>(DefaultListableBeanFactory.java:193)
    at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:78)
    at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:67)
    at com.javatpoint.Test.main(Test.java:13)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 9 more

Answer 1

我可以看到你复制了教程中的一些代码。

但你没有正确复制。

您已在spring.xml中定义了bean，如下所示

<bean id="helloBean" class="testClass">
    <property name="name" value="Mkyong" />
</bean>

但是没有名称 testClass 的类，其中变量名称

我想，现在你可以做其他事情了

Answer 2

此异常主要发生在未导入commons-logging-1.1.3.jar时。转到构建路径＆gt;配置构建路径＆gt;图书馆＆gt;添加外部JAR。选择commons-logging-1.1.3.jar并申请。

Spring HelloWorld：线程中的异常＆＃34; main＆＃34; java.lang.NoClassDefFoundError

2 个答案: