Java NoSuchBeanDefinitionException：未定义名为“三角形”的 bean

NoSuchBeanDefinitionException: No bean named 'triangle' is defined

提问by Vishal K Chadha

I am new to spring. I am getting

我是春天的新手。我正进入（状态

NoSuchBeanDefinitionException: No bean named 'triangle' is defined

NoSuchBeanDefinitionException：未定义名为“三角形”的 bean

with a simple java app.

用一个简单的java应用程序。

I am getting the following Error Msg

我收到以下错误消息

Jul 20, 2014 7:44:44 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@383118: startup date [Sun Jul 20 07:44:44 EDT 2014]; root of context hierarchy
Jul 20, 2014 7:44:44 AM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@47eaec: defining beans []; root of factory hierarchy
Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'Triangle' is defined
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:570)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1108)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:278)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1117)
    at com.springDemo.main.DrawingApp.main(DrawingApp.java:22)

my contextBean.xml

我的 contextBean.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="triangle"  class="com.springDemo.main.Triangle1" >
        <property name="type" value="Equilateral" /> 
    </bean >

</beans>

DrawingApp.java

绘图应用程序

package com.springDemo.main;

import org.springframework.core.io.*;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class DrawingApp {

    private static ApplicationContext context;

    static String[] springConfig  = 
    {   
        "classpath::*/com/springDemo/main/contextBean.xml"           
    };

    public static void main(String[] args)
    {

        context = new ClassPathXmlApplicationContext(springConfig);
        Triangle triangle =( Triangle )context.getBean("triangle");
        triangle.draw();
    }
}

回答by Jens

there are two :in the classpath definition. try to remove on:

:类路径定义中有两个。尝试删除：

"classpath:*/com/springDemo/main/contextBean.xml"

回答by Reimeus

It's likely that contextBean.xmlis not being loaded by Spring. Try loading the context file directly, i.e. without wildcard and the aforementioned :character

很可能contextBean.xml没有被 Spring 加载。尝试直接加载上下文文件，即没有通配符和上述:字符

context = 
   new ClassPathXmlApplicationContext("/com/springDemo/main/contextBean.xml" );

回答by Braj

You are already looking in class pathusing ClassPathXmlApplicationContexthence there is no need to add classpath::*.

您已经在使用 类路径查找，ClassPathXmlApplicationContext因此无需添加classpath::*.

Simply removeit and see your problem will be gone.

只需将其删除，您的问题就会消失。

ctx = new ClassPathXmlApplicationContext("com/springDemo/main/contextBean.xml");

---

---

You can try with FileSystemXmlApplicationContextas well where you have to use classpath:

您也可以FileSystemXmlApplicationContext在必须使用的地方尝试classpath:

ctx = new FileSystemXmlApplicationContext("classpath:com/springDemo/main/contextBean.xml");