在动态 Web 项目（Apache Tomcat 服务器）上使用 JNI so 文件
Using JNI so files on a dynamic web project(Apache Tomcat Server)
我正在做一个动态网页项目，需要使用外部jar文件。那个 jar 使用了几个 JNI so 文件。现在我有了 jar 和所有需要的 so 文件。我已经将jar添加到java构建路径，但我不知道如何将so文件引入tomcat服务器。
我尝试将 so 文件的路径添加为 "LD_LIBRARY_PATH":
(Properties->Run/Debug Settings->edit->Environment->Select) and also
adding the path to "java.library.path"(Run
As->RunConfigurations->Tomcat v8 Server->Arguments->VM arguments)
flag.
仍然无法正常工作，每当我的代码尝试从上面提到的 jar 访问 functions/classes 时，我都会遇到以下错误：
SEVERE: Servlet.service() for servlet [org.iotivity.simulator.agent.LaunchSimulator] in context with path
[/SimulatorAgent] threw exception [Servlet execution threw an
exception] with root cause java.lang.ClassNotFoundException:
org.oic.simulator.server.SimulatorResource$Type at
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
at
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139)
at
org.iotivity.simulator.agent.LaunchSimulator.doPost(LaunchSimulator.java:86)
at
org.iotivity.simulator.agent.LaunchSimulator.doGet(LaunchSimulator.java:45)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
我已经用一个简单的 Java 应用程序尝试了相同的代码，通过设置 LD_LIBRARY_PATH 变量它工作正常。
任何建议将不胜感激。
您的错误是 ClassNotFoundException，这表明 JAR 未正确包含。如果本机库有问题，您会得到一个 UnsatisfiedLinkError。要使 JAR 可用于 Tomcat，您需要将其添加到类路径 (-classpath=/path/to/your.jar) 或将其包含在您的 WAR 中。后者取决于您的构建系统，但如果您使用 Maven，则使用 maven-shade-plugin 相当容易（尽管这仅适用于 JAR，您必须继续单独分发本机代码）。希望对您有所帮助！
我正在做一个动态网页项目，需要使用外部jar文件。那个 jar 使用了几个 JNI so 文件。现在我有了 jar 和所有需要的 so 文件。我已经将jar添加到java构建路径，但我不知道如何将so文件引入tomcat服务器。
我尝试将 so 文件的路径添加为 "LD_LIBRARY_PATH":
(Properties->Run/Debug Settings->edit->Environment->Select) and also adding the path to "java.library.path"(Run As->RunConfigurations->Tomcat v8 Server->Arguments->VM arguments) flag.
仍然无法正常工作，每当我的代码尝试从上面提到的 jar 访问 functions/classes 时，我都会遇到以下错误：
SEVERE: Servlet.service() for servlet [org.iotivity.simulator.agent.LaunchSimulator] in context with path [/SimulatorAgent] threw exception [Servlet execution threw an exception] with root cause java.lang.ClassNotFoundException: org.oic.simulator.server.SimulatorResource$Type at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139) at org.iotivity.simulator.agent.LaunchSimulator.doPost(LaunchSimulator.java:86) at org.iotivity.simulator.agent.LaunchSimulator.doGet(LaunchSimulator.java:45) at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)
我已经用一个简单的 Java 应用程序尝试了相同的代码，通过设置 LD_LIBRARY_PATH 变量它工作正常。
任何建议将不胜感激。
您的错误是 ClassNotFoundException，这表明 JAR 未正确包含。如果本机库有问题，您会得到一个 UnsatisfiedLinkError。要使 JAR 可用于 Tomcat，您需要将其添加到类路径 (-classpath=/path/to/your.jar) 或将其包含在您的 WAR 中。后者取决于您的构建系统，但如果您使用 Maven，则使用 maven-shade-plugin 相当容易（尽管这仅适用于 JAR，您必须继续单独分发本机代码）。希望对您有所帮助！