Question

编辑：当我从SPRING DEPENDENCY @ POM.XML中删除提供时，它突然有效，有人可以告诉我它为什么会起作用吗？

嗨，大家好我一直

Caused by: java.lang.NoClassDefFoundError: org/springframework/beans/factory/support/BeanDefinitionRegistry

每当我尝试执行

时

mvn exec:java -Dexec.mainClass="org.carlos.spring.FirstSpringHelloWorld"

我的代码

代码如下

package org.carlos.spring;

import org.springframework.beans.factory.support.BeanDefinitionReader;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.PropertiesBeanDefinitionReader;
import org.springframework.core.io.ClassPathResource;

import org.carlos.decoupled.MessageSource;
import org.carlos.decoupled.MessageDestination;

public class FirstSpringHelloWorld {

    public static void main(String[] args) {        
        DefaultListableBeanFactory bf = new DefaultListableBeanFactory();       
        BeanDefinitionReader reader = new PropertiesBeanDefinitionReader(bf);
        reader.loadBeanDefinitions(new ClassPathResource("/META-INF/spring/helloworld-context.properties"));

        MessageSource source = (MessageSource) bf.getBean("source");
        MessageDestination destination = (MessageDestination) bf.getBean("destination");

        destination.write(source.getMessage());     
    }
}

package org.carlos.decoupled;

public interface MessageSource {
    String getMessage();
}


package org.carlos.decoupled;

public interface MessageDestination {
    void write(String message);    
}

这是我的POM.XML

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.carlos.hello</groupId>
  <artifactId>hello</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <name>hello Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.4</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>2.5.5</version>
      <scope>provided</scope>     
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>2.5.5</version>
      <scope>provided</scope>     
    </dependency>   
  </dependencies>
  <build>
    <finalName>hello</finalName>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.5</source>
          <target>1.5</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>maven-jetty-plugin</artifactId>
      </plugin>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

hello-world-context.properties：

source.(class)=org.carlos.decoupled.SimpleMessageSource
destination.(class)=org.carlos.decoupled.StdoutMessageDestination

有人可以告诉我如何解决这个问题吗？我的智慧结束了:(

Answer 1

maven控制编译时类路径，但不控制运行时类路径。检查运行时类路径（通常是名为CLASSPATH的环境变量）以确保所有依赖项都在运行时类路径中（包括spring jar）。

无法运行Spring Hello World继续获取NoClassDefFoundError

1 个答案: