在SpringBootEmbeddedTomcatServer

Question

我正在尝试使用嵌入式tomcat服务器中的JNDI配置端点服务URL（我将从在Spring Boot中编写的其余服务中调用该端点）。但是我不能这样做，因为它引发了classcastexception。无法从代理转换为URL

例外：

Caused by: java.lang.ClassCastException: com.sun.proxy.$Proxy51 cannot be cast to java.net.URL
    at io.javabrains.boot.ApplicationStarter.jndiDataSource(ApplicationStarter.java:85) [classes/:na]
    at io.javabrains.boot.ApplicationStarter$$EnhancerBySpringCGLIB$$59e10b3.CGLIB$jndiDataSource$0(<generated>) ~[classes/:na]
    at io.javabrains.boot.ApplicationStarter$$EnhancerBySpringCGLIB$$59e10b3$$FastClassBySpringCGLIB$$90c9344c.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.4.RELEASE.jar:5.1.4.RELEASE]

@Bean
public TomcatServletWebServerFactory servletContainerV2() {return new TomcatServletWebServerFactory() {
    @Override
    protected TomcatWebServer 
    getTomcatWebServer(org.apache.catalina.startup.Tomcat tomcat) {
      tomcat.enableNaming();
      return super.getTomcatWebServer(tomcat);
}

 @Override
 protected void postProcessContext(Context context) {
    ContextResource resource = new ContextResource();
    resource.setName("jdbc/myJndiResource");
    resource.setType(URL.class.getName());
    URL url = "www.google.com"
    resource.setProperty("url",url)
    context.getNamingResources().addResource(resource);
}

================================================ ==========

使用JNDIObjectFactoryBean检索contextResource

@Bean
public URL jndiDataSource() throws IllegalArgumentException, NamingException {
    JndiObjectFactoryBean bean = new JndiObjectFactoryBean(); 
    bean.setJndiName("java:/comp/env/jdbc/myJndiResource"); 
    bean.setExpectedType(URL.class);
    bean.setLookupOnStartup(false);
    bean.afterPropertiesSet();
    URL url = (URL)bean.getObject();
    }

我将能够从jndiDataSource获取URL，该URL可以基于运行环境（例如dev，staging等）在运行时注入到我的服务bean中。