我无法运行我的第一个Spring应用程序Hello World？我已经添加了所有的罐子

Question

我在尝试运行我的第一个在我的控制台上显示Hello world的spring应用程序时遇到问题。我收到了这个错误。

Oct 16, 2013 10:24:37 AM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5d764be1: startup date [Wed Oct 16 10:24:37 EAT 2013]; root of context hierarchy
Oct 16, 2013 10:24:37 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [Beans.xml]
Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [Beans.xml]; nested exception is java.io.FileNotFoundException: class path resource [Beans.xml] cannot be opened because it does not exist
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:341)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:243)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131)
    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:527)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:441)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at come.tutorialspoint.MainApp.main(MainApp.java:10)
Caused by: java.io.FileNotFoundException: class path resource [Beans.xml] cannot be opened because it does not exist
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:157)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:328)
    ... 13 more

这是Beans.xml文件：

<?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.org/schema/beans/spring-beans-
3.0.xsd">
<bean id="helloWorld" class="com.tutorialspoint.HelloWorld">
<property name="message" value="Hello World!"/>
 </bean>
</beans>

通过右键单击并添加android .xml文件，我在精确包中创建了Beans.xml文件。这是java类：

package come.tutorialspoint;

public class HelloWorld {
   private String message;

   public void setMessage(String message){
      this.message  = message;
   }

   public void getMessage(){
      System.out.println("Your Message : " + message);
   }
}

这是Main类：

public class MainApp {
public static void main(String[] args) {
    ApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml");
    HelloWorld obj = (HelloWorld) context.getBean("helloWorld");
    obj.getMessage();
    }
}

Answer 1

根据您对该问题的最后一条评论，您的Beans.xml位于错误的位置。选项：

• 将Beans.xml移动到“src / main / resources / Beans.xml”

要么

• 将Beans.xml移动到“src / main / java / Beans.xml”

要么

• 将ClassPathXmlApplicationContext("Beans.xml")改为ClassPathXmlApplicationContext("come/tutorialspoint/Beans.xml");

第一个选项是每个Java / Maven约定的首选选项。

您的错误是ClassPathXmlApplicationContext需要一个类路径位置，其中包含任何包信息。您的Beans.xml目前位于“come.tutorialspoint”包中;

欲了解更多信息：

• Spring 3 Documentation - Application contexts and Resource paths
• Spring cannot find bean xml configuration file when it does exist

Answer 2

将Bean.xml保存在Java文件的相同包中，而不是使用：

ClassPathXmlApplicationContext("Beans.xml")

使用：

ClassPathXmlApplicationContext("come/tutorialspoint/Beans.xml");