Spring Boot，JNDI 数据源，Tomcat [重复]

Question

我现在承认，在我尝试使用 JNDI 数据源创建一个带有嵌入式 Tomcat（并且可部署到实际 Tomcat）的 Spring Boot 应用程序时，我已经断断续续地阅读了许多问题、答案和网站。多次失败后，我开始认为这根本不可能，这只是一个大阴谋！

在我永远放弃之前的最后一次尝试中，我现在要问：你到底是怎么做到的？

这是我目前所拥有的： 我的主要课程：

@Configuration
@ComponentScan
@EnableAutoConfiguration
public class FinanceApplication {

  public static void main(String[] args) throws Exception {
    SpringApplication.run(FinanceApplication.class, args);
  }

  @Bean
  public TomcatEmbeddedServletContainerFactory tomcatFactory() {
    return new TomcatEmbeddedServletContainerFactory() {

        @Override
        protected TomcatEmbeddedServletContainer getTomcatEmbeddedServletContainer(
                Tomcat tomcat) {
            tomcat.enableNaming();
            return super.getTomcatEmbeddedServletContainer(tomcat);
        }

        @Override
        protected void postProcessContext(Context context) {
            ContextResource resource = new ContextResource();
            resource.setName("jdbc/finance");
            resource.setType(DataSource.class.getName());
            resource.setProperty("driverClassName", "com.mysql.jdbc.Driver");
            resource.setProperty("url", "jdbc:mysql://localhost:3306/finance");
            resource.setProperty("username", "xxxx");
            resource.setProperty("password", "yyyy");

            context.getNamingResources().addResource(resource);
        }
    };
  }

  @Bean(destroyMethod="")
  public DataSource jndiDataSource() throws IllegalArgumentException, NamingException {
    JndiObjectFactoryBean bean = new JndiObjectFactoryBean();
    bean.setJndiName("java:comp/env/jdbc/finance");
    bean.setProxyInterface(DataSource.class);
    bean.setLookupOnStartup(false);
    bean.afterPropertiesSet();
    return (DataSource)bean.getObject();
  }
}

我的 Servlet 配置（基于 java）：

public class ServletInitializer extends SpringBootServletInitializer {

  @Override
  protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
    return application.sources(FinanceApplication.class);
  }

}

我使用的是 Maven，我的 pom.xml 是基于 this one

问题：

当我在 Eclipse 中运行它时，我得到了这些异常（切入正题）：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is org.springframework.jndi.JndiLookupFailureException: JndiObjectTargetSource failed to obtain new target object; nested exception is javax.naming.NameNotFoundException: Name [comp/env/jdbc/finance] is not bound in this Context. Unable to find [comp].

当我使用 Maven 部署到独立的 Tomcat 实例时，我得到了这个异常：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is org.springframework.jndi.JndiLookupFailureException: JndiObjectTargetSource failed to obtain new target object; nested exception is javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956)
...

Answer 1

问题根本不在于我的应用程序，而在于我的 Tomcat 配置。感谢对this question 的接受回答，我发现我需要在Tomcat 的context.xml 中添加一个ResourceLink 元素。我想知道为什么 Tomcat JNDI HowTo 没有提到它？