在基于jersey的web应用程序中，无法从spring boot的application.properties文件中读取任何值

我正在SpringBoot中开发一个基于jersey的web应用程序，现在我想将属性文件添加到我的应用程序中。我补充说 applicationContext.xml 及 application.properties 在我的课堂路径里面 src/main/resources 但当我尝试使用 @Value 或使用 org.springframework.core.env.Environment ，我越来越 NullPointerException . 这是我的密码-
web.xml-

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/Javaee"
    xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    id="TEST" version="3.0">
    <display-name>TestProject</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <icon>
        <large-icon>images/B.svg</large-icon>
    </icon>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <resource-ref>
        <res-ref-name>jdbc/Test</res-ref-name>
        <res-type>javax.sql.DataSource</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>
</web-app>

applicationcontext.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:c="http://www.springframework.org/schema/c"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.1.xsd">

    <context:property-placeholder location="classpath:application.properties" />

</beans>

应用程序属性-

demo.property=Demo
test.property=PropertyWorking

application.java-

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

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

}

jerseyresourceconfig.java-

import java.util.HashMap;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.ws.rs.ApplicationPath;

import org.glassfish.jersey.internal.inject.AbstractBinder;
import org.glassfish.jersey.logging.LoggingFeature;
import org.glassfish.jersey.process.internal.RequestScoped;
import org.glassfish.jersey.server.ResourceConfig;

import com.demo.server.JPAEntityManagerFactory;

@ApplicationPath("api")
public class JerseyResourceConfig extends ResourceConfig {
    public JerseyResourceConfig() {
        packages(this.getClass().getPackageName());

        Map<String, Object> loggingProperties=new HashMap<String, Object>();
        loggingProperties.put(LoggingFeature.LOGGING_FEATURE_VERBOSITY_SERVER, LoggingFeature.Verbosity.PAYLOAD_ANY);
        // loggingProperties.put(LoggingFeature.LOGGING_FEATURE_MAX_ENTITY_SIZE_SERVER, );

        addProperties(loggingProperties);

        register(new AbstractBinder() {

            @Override
            protected void configure() {
                bindFactory(JPAEntityManagerFactory.class).to(EntityManager.class).in(RequestScoped.class);
            }});
    }
}

试图从中访问属性的类文件-

@Provider
@Path("v1")
@PropertySource("classpath:application.properties")
public class Restv1 {

    @Autowired
    private org.springframework.core.env.Environment env;

    @Value("${demo.property}")
    String testA;

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    @Path("demoApi")
    public Response demoApi() {
        String testB = env.getProperty("test.property");
        logger.info("TEST PROPERTY FILE. VALUE FOR KEY demo.property IS - ", testA);
        System.out.println("TEST PROPERTY FILE. VALUE FOR KEY demo.property IS - "+ testA);
        logger.info("TEST PROPERTY FILE. VALUE FOR KEY test.property IS - ", testB);
        System.out.println("TEST PROPERTY FILE. VALUE FOR KEY test.property IS - "+ testB);
        ..
        //more code
        ..
      }
 }

当我在tomcat中构建并部署war时，当我尝试访问此 /demoApi api，我得到以下信息 NullPointerException -

09-Jul-2021 15:59:49.016 SEVERE [http-nio-8080-exec-2] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [com.server.rest.JerseyResourceConfig] in context with path [/..] threw exception [java.lang.NullPointerException] with root cause
    java.lang.NullPointerException
        at com.server.rest.Restv1.demoApi(Restv1.java:83)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
        at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:176)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
        at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
        at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
        at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
        at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
        at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
        at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:366)
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:319)
        at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
        at com.server.HttpAuthFilter.doFilter(HttpAuthFilter.java:126)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.base/java.lang.Thread.run(Thread.java:834)

请帮忙。我哪里做错了？我是否缺少任何配置？？提前谢谢。

在基于jersey的web应用程序中，无法从spring boot的application.properties文件中读取任何值

暂无答案！

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