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Spring 的配置错误！在线等，着急

摘要: Spring 的配置错误！在线等，着急

抱出的警告是：

log4j:WARN No appenders could be found for logger (org.springframework.beans.factory.xml.XmlBeanDefinitionReader).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.ClassCastException: com.yuan.spring.HelloWorldB
at com.yuan.spring.TestClient.main(TestClient.java:21)


我的配置文件：

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


SecondSpring












我的测试端：
package com.yuan.spring;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
public class TestClient {
public TestClient() {
super();

}
public static void main(String[] args) {


ApplicationContext ctx = new FileSystemXmlApplicationContext(".//WebRoot//WEB-INF//applicationContext.xml");

IHelloWorldB ihwb = (IHelloWorldB)ctx.getBean("helloService");
String result = ihwb.sayHello();
System.out.println("<---"+result+"-");

}

}

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java.lang.ClassCastException 第21行
类型转换的问题，没有代码你好好找找吧

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IHelloWorldB ihwb = (IHelloWorldB)ctx.getBean("helloService");
这里的问题，类转换报错，贴出你的com.yuan.spring.HelloWorldB的代码

---

package com.yuan.spring;

public class HelloWorldB {

IHelloWorld helloworld;

public HelloWorldB()
{
super();
}
public String sayHello()
{
return helloworld.sayHello();
}
public IHelloWorld getHelloworld() {
return helloworld;
}
public void setHelloworld(IHelloWorld helloworld) {
this.helloworld = helloworld;
}
}

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谢谢，大家，我没有继承 IHelloWorldB 这个接口！！

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