Блог

Главная - Вопросы по программированию - Чтение XML — файла — Eclipse

Чтение XML — файла — Eclipse

#java #xml #spring #javabeans #applicationcontext

Вопрос:

Я новичок в Spring Framework

Я пытаюсь создать объект для класса, очень простую вещь

но при чтении я получаю много ошибок

Он показывает исключение ClassNotFound

Исходный код выглядит следующим образом:

 package com.practice.spring;

//sim interface

public interface Sim {
  void calling();
  void data();
}

// class airtel implementing the sim interface

public class Airtel implements Sim {

    @Override
    public void calling() {
        System.out.println("Calling from an Airtel :");

    }

    @Override
    public void data() {
        System.out.println("Data from an Airtel:");

    }

}

//The driver Class

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

public class Mobile {
    public static void main(String[] args) {
        
        
        /*
         * Sim a = new Idea(); a.calling(); a.data();
         */
        
        ApplicationContext con = new ClassPathXmlApplicationContext("beans.xml");
        Airtel s = con.getBean("air", Airtel.class);
        s.calling();
        s.data();

// not also working with when using with Interface reference as 
        Sim s = con.getBean("air",Airtel.class);

     
        
    }
}

XML-файл является

 <?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="air" class = "/SpringDemo/src/com/practice/spring/Airtel.java"></bean>
       
       </beans>

Ошибка, которую я получаю, заключается в следующем:

 Jun 03, 2021 7:24:52 PM org.springframework.context.support.AbstractApplicationContext refresh
WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [/SpringDemo/src/com/practice/spring/Airtel.java] for bean with name 'air' defined in class path resource [beans.xml]; nested exception is java.lang.ClassNotFoundException: /SpringDemo/src/com/practice/spring/Airtel.java
Exception in thread "main" org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [/SpringDemo/src/com/practice/spring/Airtel.java] for bean with name 'air' defined in class path resource [beans.xml]; nested exception is java.lang.ClassNotFoundException: /SpringDemo/src/com/practice/spring/Airtel.java
    at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1486)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:681)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:648)
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1614)
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1090)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:877)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
    at com.practice.spring.Mobile.main(Mobile.java:14)
Caused by: java.lang.ClassNotFoundException: /SpringDemo/src/com/practice/spring/Airtel.java
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:427)
    at org.springframework.util.ClassUtils.forName(ClassUtils.java:284)
    at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:469)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1551)
    at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1478)
    ... 10 more

and finally, the JAR files that I added externally are:

 C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-aop-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-aop-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-aop-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-aspects-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-aspects-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-aspects-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-beans-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-beans-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-beans-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-indexer-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-indexer-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-indexer-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-support-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-support-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-context-support-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-core-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-core-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-core-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-expression-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-expression-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-expression-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-instrument-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-instrument-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-instrument-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jcl-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jcl-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jcl-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jdbc-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jdbc-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jdbc-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jms-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jms-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-jms-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-messaging-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-messaging-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-messaging-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-orm-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-orm-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-orm-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-oxm-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-oxm-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-oxm-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-test-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-test-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-test-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-tx-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-tx-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-tx-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-web-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-web-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-web-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-webflux-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-webflux-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-webflux-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-webmvc-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-webmvc-5.2.15.RELEASE-javadoc.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-webmvc-5.2.15.RELEASE-sources.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-websocket-5.2.15.RELEASE.jar
C:Spring Librariesspring-framework-5.2.15.RELEASElibsspring-websocket-5.2.15.RELEASE-javadoc.jar
spring-websocket-5.2.15.RELEASE-sources.jar

Путь к классу предназначен для класса Airtel, а интерфейс Sim-карты: C:Spring ПроектSpringDemosrccomпрактика

а для XML-файла это : C:Spring ПроектSpringDemosrc

IDE: Eclipse

Как я могу сделать этот исполняемый файл, поскольку я хотел знать, как контейнер IOC считывает XML-файл для создания объектов?

Ценю отзывы, которые вы можете предоставить

Спасибо

Комментарии:

1. Обновите beans.xml ссылка на класс как com.practice.spring. Эйртел . Исключение связано с тем, что путь к классу указан неверно

Метки: