tomcat 没有读取环境变量

Question

我在 AKS 上有一个 tomcat 应用程序运行。我创建了一堆环境变量，所以当 tomcat 启动时，它可以替换值。当我在容器中使用 printenv 时，它显示了通过 deployment.yaml.

设置的所有环境变量

但是tomcat启动的时候，还是不识别环境变量，提示是这样的：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'PACSDemoController': Invocation of init method failed; nested exception is java.net.URISyntaxException: Illegal character in path at index 1: ${widgetsRestBaseUrl}

这是我的 class:

public class BaseDemoController {  
    protected URI restUri;

    @Resource(name = "widgetsRestBaseUrl")
    protected String widgetsRestBaseUrl;

    @Resource(name = "widgetsServerUploaderUrl")
    protected String widgetsServerUploaderUrl;

    @Resource(name = "widgetsServerViewerUrl")
    protected String widgetsServerViewerUrl;

    @Resource(name = "widgetsServerStudySelectionUrl")
    protected String widgetsServerStudySelectionUrl;
    
    @Resource(name = "widgetsServerHieStudySelectionUrl")
    protected String widgetsServerHieStudySelectionUrl;

    @Resource(name = "widgetsServerPatientHistoryUrl")
    protected String widgetsServerPatientHistoryUrl;
    
    @Resource(name = "widgetsServerShareImageUrl")
    protected String widgetsServerShareImageUrl;

    @Resource(name = "widgetServerPacsConfigUrl")
    protected String widgetServerPacsConfigUrl;
    @Resource(name = "apiNominate")
    protected String apiNominate;

    @Resource(name = "apiPacsConfig")
    protected String apiPacsConfig;
    @Resource(name = "widgetsServerNominatePacsUrl")
    protected String widgetsServerNominatePacsUrl;
    

    @Resource(name = "apiBaseUrl")
    protected String apiBaseUrl;    

    @Resource(name = "widgetsBasicPacsConfigUrl")
    protected String widgetsBasicPacsConfigUrl;
    
    @Resource(name = "auth0Domain")
    protected String auth0Domain;    
    
    @Resource(name = "widgetAuth0Audience")
    protected String widgetAuth0Audience;    
    
    @Resource(name = "apiAuth0Audience")
    protected String apiAuth0Audience;    
   
    @Autowired
    protected EpicTokenService epicTokenService;

    @PostConstruct
    public void initialize() throws URISyntaxException {
        restUri = new URI(widgetsRestBaseUrl);
    }

所有这些资源都来自jndi.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"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd">

    <bean id="apiBaseUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${apiBaseUrl}"/>
    </bean>

    <bean id="widgetsRestBaseUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsRestBaseUrl}"/>
    </bean>

    <bean id="widgetsServerUploaderUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsServerUploaderUrl}"/>
    </bean>

    <bean id="widgetsServerViewerUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsServerViewerUrl}"/>
    </bean>

    <bean id="widgetsServerStudySelectionUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsServerStudySelectionUrl}"/>
    </bean>

    <bean id="widgetsServerPatientHistoryUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsServerPatientHistoryUrl}"/>
    </bean>

    <bean id="widgetsServerShareImageUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsServerShareImageUrl}"/>
    </bean>

    <bean id="widgetServerPacsConfigUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetServerPacsConfigUrl}"/>
    </bean>

    <bean id="apiPacsConfig" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${apiPacsConfig}"/>
    </bean>

    <bean id="apiNominate" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${apiNominate}"/>
    </bean>

    <bean id="widgetsServerNominatePacsUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsServerNominatePacsUrl}"/>
    </bean>

    <bean id="widgetsBasicPacsConfigUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsBasicPacsConfigUrl}"/>
    </bean>

    <bean id="widgetsServerHieStudySelectionUrl" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetsServerHieStudySelectionUrl}"/>
    </bean>

    <bean id="apiAuth0Audience" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${apiAuth0Audience}"/>
    </bean>

    <bean id="widgetAuth0Audience" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${widgetAuth0Audience}"/>
    </bean>

    <bean id="auth0Domain" class="java.lang.String" factory-method="valueOf">
        <constructor-arg value="${auth0Domain}"/>
    </bean>

</beans>

我不确定为什么这不起作用。我有两个几乎完全相同的项目，一个项目没有问题。有什么建议吗？

更新：PACDemoController 扩展自 BaseDemoController：

@Controller
public class PACSDemoController extends BaseDemoController {

错误来自 BaseDemoController 中的@PostConstruct。这是日志：

Caused by: java.net.URISyntaxException: Illegal character in path at index 1: ${widgetsRestBaseUrl}
    at java.net.URI$Parser.fail(URI.java:2848)
    at java.net.URI$Parser.checkChars(URI.java:3021)
    at java.net.URI$Parser.parseHierarchical(URI.java:3105)
    at java.net.URI$Parser.parse(URI.java:3063)
    at java.net.URI.<init>(URI.java:588)
    at com.accelarad.smr.widgets.demo.BaseDemoController.initialize(BaseDemoController.java:90)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:307)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136)
    ... 27 more

Answer 1

Tomcat与将${...}替换为相应系统环境变量的值没有任何关系。它仅在自己的配置文件（server.xml、各种 context.xml 描述符等）中替换这些值。

如果您希望 Spring 替换那些属性占位符 ${...}，您需要将 PropertySourcesPlaceholderConfigurer 添加到您的应用程序上下文中。这可以通过以下方式完成：

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       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
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <context:property-placeholder />
    ...
</beans>

然而，直接从 Spring Environment using the @Value 注释中注入属性值比创建数百个 java.lang.String.[=21 类型的 beans 更容易=]

tomcat 没有读取环境变量

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