相关疑难解决方法(0)

关于Java 9中的非法反射访问存在很多问题.

现在我找不到的是因为所有谷歌都在努力解决错误信息,实际上是非法的反射访问.

所以我的问题很简单:

什么定义非法反射访问以及什么情况触发警告？

我已经收集到它与Java 9中引入的封装原则有关,但它们如何挂在一起以及什么触发警告在什么情况下我找不到解释.

我只是尝试用Java 9运行我的服务器并得到下一个警告:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by io.netty.util.internal.ReflectionUtil (file:/home/azureuser/server-0.28.0-SNAPSHOT.jar) to constructor java.nio.DirectByteBuffer(long,int)
WARNING: Please consider reporting this to the maintainers of io.netty.util.internal.ReflectionUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

我想隐藏此警告而不--illegal-access=deny在启动期间添加JVM选项.就像是:

System.setProperty("illegal-access", "deny");

有没有办法做到这一点？

建议使用JVM选项的所有相关答案,我想从代码中关闭它.那可能吗？

澄清 - 我的问题是关于从代码中转发此警告而不是通过类似问题中所述的JVM参数/标志.

我的JDK 9 + 181 Spring Boot 2.0.0.BUILD-SNAPSHOT CLI应用程序在启动时显示此警告:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (jar:file:/home/jan/src/fm-cli/target/fm-cli-0.1.0-SNAPSHOT.jar!/BOOT-INF/lib/spring-core-5.0.0.RELEASE.jar!/) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1

这是一个控制台应用程序,所以我需要禁用此警告 - 我该怎么做？

注意:此问题询问如何禁用Spring触发此警告的具体问题; 它不是JDK9的副本:发生了非法的反射访问操作.org.python.core.PySystemState,用于处理不同库中的类似症状.

正如主题所说的那样,Java中是否有一种方法可以获得在任何给定时间加载的所有JNI本机库的列表？

我正在尝试使用Spring Boot 2进行Java 10开发,但我遇到了一些问题.

该应用程序是一个基于Spring Boot 2的简单webapp.应用程序启动是可以的但是当我停止它时,我收到此警告:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.catalina.loader.WebappClassLoaderBase (file:/C:/Users/CS/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.11/tomcat-embed-core-9.0.11.jar) to field java.io.ObjectStreamClass$Caches.localDescs
WARNING: Please consider reporting this to the maintainers of org.apache.catalina.loader.WebappClassLoaderBase
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

如您所见,我已经将嵌入式Tomcat服务器从版本8切换到9.0.11以符合Java模块系统.该应用程序随选项启动--add-opens java.base/java.lang=ALL-UNNAMED

有人知道我为什么收到这条消息吗？

我正在使用 Apache POI 来处理 excel 文件，从 Java 9 开始，我收到了这条消息，根据这篇文章JDK9：发生了非法反射访问操作。org.python.core.PySystemState我们应该等待开发人员解决问题，但我应该在我的新生产版本中保留它吗？如果我跳过警告，我认为这应该不是问题。

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.poi.util.DocumentHelper (file:/T:/Workspace/Java/Sections%20Manager/libs/poi/poi-ooxml-3.17.jar) to method com.sun.org.apache.xerces.internal.util.SecurityManager.setEntityExpansionLimit(int)
WARNING: Please consider reporting this to the maintainers of org.apache.poi.util.DocumentHelper
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

我使用 Spring Boot 2.0.0.RC1、JDK 9.0.4、IntelliJ IDEA 2017.3.4 Ultimate、Gradle 4.5.1。Spring Boot RC1 版本（严格来说，Spring Framework 5.0.3.RELEASE）有一个已知问题：https ://jira.spring.io/browse/SPR-15859 ，我也在这里看到https://github.com/ dsyer/spring-boot-java-9#create-a-spring-boot-application

Spring开发人员建议

您可以通过在命令行中添加 -illegal-access=deny 来关闭它（Java 9 中的默认值是 permit）。

我选择菜单Help \ Edit Custom VM Options...，然后在文件的最后一行添加新选项。

然后我发现错误

> Unrecognized option: -illegal-access=deny 
>
> Error: Could not create the Java Virtual Machine. 
>
> Error: A fatal exception has occurred. Program will exit.

Full console log

/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home/bin/java -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=50382 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=127.0.0.1 -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=50383:/Applications/IntelliJ IDEA.app/Contents/bin" -Dfile.encoding=UTF-8 -classpath /Users/donhuvy/Documents/source_code/gitlab.com/Donhu/accounting_vy/source_code/out/production/classes:/Users/donhuvy/Documents/source_code/gitlab.com/Donhu/accounting_vy/source_code/out/production/resources:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-actuator/2.0.0.RC1/spring-boot-starter-actuator-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-data-jpa/2.0.0.RC1/spring-boot-starter-data-jpa-2.0.0.RC1.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-jersey/2.0.0.RC1/84315afdba22f18e8473dabe39507c2f7329bbf/spring-boot-starter-jersey-2.0.0.RC1.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-mail/2.0.0.RC1/5cd08bbbfaa424ab2e250e51dd9d13bd38a1d42d/spring-boot-starter-mail-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-thymeleaf/2.0.0.RC1/spring-boot-starter-thymeleaf-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.0.0.RC1/spring-boot-starter-web-2.0.0.RC1.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.hibernate/hibernate-entitymanager/5.2.13.Final/cdef4ec0e1c9739942fbd16bb6b355d5fb804fba/hibernate-entitymanager-5.2.13.Final.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.hibernate/hibernate-core/5.2.13.Final/830492a74b3013ef75135ea4120b2ac23fa7ad9f/hibernate-core-5.2.13.Final.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/javax.xml.bind/jaxb-api/2.3.0/99f802e0cb3e953ba3d6e698795c4aeb98d37c48/jaxb-api-2.3.0.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/com.sun.xml.bind/jaxb-core/2.3.0/d044c784e41d026778693fb44a8026c1fd9a7506/jaxb-core-2.3.0.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/com.sun.xml.bind/jaxb-impl/2.3.0/3a3c6a62719d967175b76b63925f1fb495f11437/jaxb-impl-2.3.0.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.hibernate.javax.persistence/hibernate-jpa-2.1-api/1.0.2.Final/52afb5762c704a6b586e27742470c08f91877fc1/hibernate-jpa-2.1-api-1.0.2.Final.jar:/Users/donhuvy/.m2/repository/org/springframework/data/spring-data-jpa/2.0.3.RELEASE/spring-data-jpa-2.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-orm/5.0.3.RELEASE/spring-orm-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/com/oracle/ojdbc7/12.1.0.1/ojdbc7-12.1.0.1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.0.0.RC1/spring-boot-starter-aop-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-jdbc/2.0.0.RC1/spring-boot-starter-jdbc-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.0.0.RC1/spring-boot-starter-json-2.0.0.RC1.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-validation/2.0.0.RC1/63ff3ff19491dc47d0b9b47e7770ddd1dbeeacb0/spring-boot-starter-validation-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-devtools/2.0.0.RC1/spring-boot-devtools-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter/2.0.0.RC1/spring-boot-starter-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-actuator-autoconfigure/2.0.0.RC1/spring-boot-actuator-autoconfigure-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/io/micrometer/micrometer-core/1.0.0-rc.8/micrometer-core-1.0.0-rc.8.jar:/Users/donhuvy/.m2/repository/javax/transaction/javax.transaction-api/1.2/javax.transaction-api-1.2.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-aspects/5.0.3.RELEASE/spring-aspects-5.0.3.RELEASE.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.ext/jersey-spring4/2.26/e5f2654b343c31078d9b5c8a4f43b838b320099f/jersey-spring4-2.26.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-webmvc/5.0.3.RELEASE/spring-webmvc-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-web/5.0.3.RELEASE/spring-web-5.0.3.RELEASE.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.containers/jersey-container-servlet/2.26/8723d05d1fe2fdda54d0921836ea5daa5abe5f00/jersey-container-servlet-2.26.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.containers/jersey-container-servlet-core/2.26/66a0d51facf1e49e2353ff0d2a2d4a9e2fa3f836/jersey-container-servlet-core-2.26.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.ext/jersey-bean-validation/2.26/33747b4e8a07c53550ee1cbe7fc4321600842c5a/jersey-bean-validation-2.26.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.core/jersey-server/2.26/aa8eff3d591641dadd7c9880bb73b59bf46d4c82/jersey-server-2.26.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.media/jersey-media-json-jackson/2.26/ce3109479991527107921ca5e7943a6e7e20db80/jersey-media-json-jackson-2.26.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.springframework/spring-context-support/5.0.3.RELEASE/853800b9fe479931f8ec5aaf7c19e285d5de1402/spring-context-support-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.0.0.RC1/spring-boot-autoconfigure-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-actuator/2.0.0.RC1/spring-boot-actuator-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot/2.0.0.RC1/spring-boot-2.0.0.RC1.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.hk2/spring-bridge/2.5.0-b42/7cedc63a9079e87b5a2685c054e61cfce8c44837/spring-bridge-2.5.0-b42.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-context/5.0.3.RELEASE/spring-context-5.0.3.RELEASE.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/com.sun.mail/javax.mail/1.6.0/a055c648842c4954c1f7db7254f45d9ad565e278/javax.mail-1.6.0.jar:/Users/donhuvy/.m2/repository/org/thymeleaf/thymeleaf-spring5/3.0.9.RELEASE/thymeleaf-spring5-3.0.9.RELEASE.jar:/Users/donhuvy/.m2/repository/org/thymeleaf/extras/thymeleaf-extras-java8time/3.0.1.RELEASE/thymeleaf-extras-java8time-3.0.1.RELEASE.jar:/Users/donhuvy/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.7.Final/hibernate-validator-6.0.7.Final.jar:/Users/donhuvy/.m2/repository/org/hibernate/common/hibernate-commons-annotations/5.0.1.Final/hibernate-commons-annotations-5.0.1.Final.jar:/Users/donhuvy/.m2/repository/org/jboss/logging/jboss-logging/3.3.1.Final/jboss-logging-3.3.1.Final.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.inject/jersey-hk2/2.26/df27f7d7577acf4b532684448021632098924dab/jersey-hk2-2.26.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.hk2/hk2/2.5.0-b42/adc396d57e9cada50f57d32cdabaf31a20a758d/hk2-2.5.0-b42.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.hk2/config-types/2.5.0-b42/3e927a0624955d10bec3eb5424a1e6ca3d5f92ae/config-types-2.5.0-b42.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.hk2/hk2-config/2.5.0-b42/de522871d987e2bf502753c807461f9ee805f6bd/hk2-config-2.5.0-b42.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.hk2/hk2-core/2.5.0-b42/7a4954663f1b65b1938fd275b34bbf1e23965381/hk2-core-2.5.0-b42.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.hk2/hk2-runlevel/2.5.0-b42/6502d8997ac961f0d2d16d90e838d25626c1a37b/hk2-runlevel-2.5.0-b42.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.hk2/hk2-locator/2.5.0-b42/9d6edc0cb226401a8316e67d81bfc37cb626ef91/hk2-locator-2.5.0-b42.jar:/Users/donhuvy/.m2/repository/org/javassist/javassist/3.22.0-CR2/javassist-3.22.0-CR2.jar:/Users/donhuvy/.m2/repository/antlr/antlr/2.7.7/antlr-2.7.7.jar:/Users/donhuvy/.m2/repository/org/jboss/spec/javax/transaction/jboss-transaction-api_1.2_spec/1.0.1.Final/jboss-transaction-api_1.2_spec-1.0.1.Final.jar:/Users/donhuvy/.m2/repository/org/jboss/jandex/2.0.3.Final/jandex-2.0.3.Final.jar:/Users/donhuvy/.m2/repository/com/fasterxml/classmate/1.3.4/classmate-1.3.4.jar:/Users/donhuvy/.m2/repository/dom4j/dom4j/1.6.1/dom4j-1.6.1.jar:/Users/donhuvy/.m2/repository/net/bytebuddy/byte-buddy/1.7.9/byte-buddy-1.7.9.jar:/Users/donhuvy/.m2/repository/org/springframework/data/spring-data-commons/2.0.3.RELEASE/spring-data-commons-2.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-aop/5.0.3.RELEASE/spring-aop-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-jdbc/5.0.3.RELEASE/spring-jdbc-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-tx/5.0.3.RELEASE/spring-tx-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-beans/5.0.3.RELEASE/spring-beans-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-expression/5.0.3.RELEASE/spring-expression-5.0.3.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/spring-core/5.0.3.RELEASE/spring-core-5.0.3.RELEASE.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.aspectj/aspectjrt/1.8.13/bfc5a877fd80648e5467239d370735654aaf7a92/aspectjrt-1.8.13.jar:/Users/donhuvy/.m2/repository/com/zaxxer/HikariCP/2.7.6/HikariCP-2.7.6.jar:/Users/donhuvy/.m2/repository/org/thymeleaf/thymeleaf/3.0.9.RELEASE/thymeleaf-3.0.9.RELEASE.jar:/Users/donhuvy/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.0.0.RC1/spring-boot-starter-logging-2.0.0.RC1.jar:/Users/donhuvy/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/donhuvy/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.10.0/log4j-to-slf4j-2.10.0.jar:/Users/donhuvy/.m2/repository/org/slf4j/jul-to-slf4j/1.7.25/jul-to-slf4j-1.7.25.jar:/Users/donhuvy/.m2/repository/org/slf4j/slf4j-api/1.7.25/slf4j-api-1.7.25.jar:/Users/donhuvy/.gradle/caches/modules-2/files-2.1/org.glassfish.jersey.core/jersey-client/2.26/125b8d1040d121a5dc4ce6858e21a6160bed7afa/jersey-client-2.26.jar:/Users/donhuvy/.gradle/cache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…

如何为非法反射访问警告抛出异常？例如，考虑以下代码：

import org.apache.commons.lang3.builder.*;

class Test {
    public static void main(String[] args) {
        System.out.println(ReflectionToStringBuilder.toString(Boolean.TRUE));
    }
}

此代码向 System.err 打印以下警告：

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.commons.lang3.builder.ReflectionToStringBuilder (file:/Users/brianschack/eclipse-workspace/User%20Libraries/com
mons-lang3-3.7/commons-lang3-3.7.jar) to field java.lang.Boolean.value
WARNING: Please consider reporting this to the maintainers of org.apache.commons.lang3.builder.ReflectionToStringBuilder
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Boolean.TRUE 是一个如此简单的值，我真的不需要 ReflectionToStringBuilder。但是更复杂的类型（例如 HashMap）会打印相同的警告。我选择 Boolean.TRUE 是为了简化这个例子。

当我搜索此警告消息时，我发现建议将其报告给包维护者、避免警告或完全禁用它（JDK9：发生非法反射访问操作。org.python.core.PySystemState）。 …

我想使用这个 JUnit 测试来测试私有方法：

@RunWith(SpringRunner.class)
@SpringBootTest(classes = ReportingProcessor.class)
public class ReportingTest {

    @Autowired
    ReportingProcessor reportingProcessor;

    @Test
    public void reportingTest() throws Exception {

        ContextRefreshedEvent contextRefreshedEvent = PowerMockito.mock(ContextRefreshedEvent.class);
        Whitebox.invokeMethod(reportingProcessor, "collectEnvironmentData", contextRefreshedEvent);

    }
}

但我得到WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.powermock.reflect.internal.WhiteboxImpl (file:/C:/Users/Mainuser/.m2/repository/org/powermock/powermock-reflect/2.0.2/powermock-reflect-2.0.2.jar) to method java.lang.Object.clone() WARNING: Please consider reporting this to the maintainers of org.powermock.reflect.internal.WhiteboxImpl WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in …

我刚刚安装了java和kotlin。

我从oracle安装了Java，通过brew安装了kotlin。

在 kotlin 中编写简单的 hello-world 代码后，我不断收到警告。

我尝试安装 IDE intellij 希望它可以修复，但没有帮助。

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.intellij.openapi.util.JDOMUtil$2 to constructor com.sun.xml.internal.stream.XMLInputFactoryImpl()
WARNING: Please consider reporting this to the maintainers of com.intellij.openapi.util.JDOMUtil$2
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

我在网上搜索过但没有任何实际帮助。

我的java版本和kotlin版本

java version "12.0.1" 2019-04-16
Java(TM) SE Runtime Environment (build 12.0.1+12)
Java HotSpot(TM) 64-Bit Server VM (build …