在jsp中访问oshi库时出现问题
我发现问题是通过JSP获取细节。 我正在使用以下版本: jna-4.2.2.jar, slf4j-api-1.7.21.jar, slf4j-simple-1.7.21.jar, jna-platform-4.2.2.jar, oshi-core-2.3.jar 问题是,每当我从JSP执行下面的代码时,我都会得到下面所述的错误,但在普通Java应用程序中,它运行良好,没有任何错误 这是JSP的错误吗?或者有没有其他方法在JSP中调用它在jsp中访问oshi库时出现问题,jsp,java-native-interface,oshi,Jsp,Java Native Interface,Oshi,我发现问题是通过JSP获取细节。 我正在使用以下版本: jna-4.2.2.jar, slf4j-api-1.7.21.jar, slf4j-simple-1.7.21.jar, jna-platform-4.2.2.jar, oshi-core-2.3.jar 问题是,每当我从JSP执行下面的代码时,我都会得到下面所述的错误,但在普通Java应用程序中,它运行良好,没有任何错误 这是JSP的错误吗?或者有没有其他方法在JSP中调用它 <%@page import="oshi.hardwa
<%@page import="oshi.hardware.HardwareAbstractionLayer"%>
<%@page import="oshi.software.os.OperatingSystem"%>
<%@page import="oshi.SystemInfo"%>
<%
SystemInfo si = new SystemInfo();
OperatingSystem os = si.getOperatingSystem();
HardwareAbstractionLayer hal = si.getHardware();
out.println(hal.getProcessor());
%>
错误是:
Warning: StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception
java.lang.NoSuchMethodError: com.sun.jna.IntegerType.<init>(IJZ)V
at com.sun.jna.platform.win32.WinDef$DWORD.<init>(WinDef.java:135)
at com.sun.jna.platform.win32.WinDef$DWORD.<init>(WinDef.java:125)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at java.lang.Class.newInstance(Class.java:442)
at com.sun.jna.NativeMappedConverter.defaultValue(NativeMappedConverter.java:47)
at com.sun.jna.NativeMappedConverter.<init>(NativeMappedConverter.java:41)
at com.sun.jna.NativeMappedConverter.getInstance(NativeMappedConverter.java:29)
at com.sun.jna.Structure.calculateSize(Structure.java:717)
at com.sun.jna.Structure.allocateMemory(Structure.java:251)
at com.sun.jna.Structure.<init>(Structure.java:153)
at com.sun.jna.Structure.<init>(Structure.java:143)
at com.sun.jna.Structure.<init>(Structure.java:139)
at com.sun.jna.Structure.<init>(Structure.java:130)
at com.sun.jna.platform.win32.WinBase$MEMORYSTATUSEX.<init>(WinBase.java:595)
at oshi.hardware.platform.windows.WindowsGlobalMemory.<init>(WindowsGlobalMemory.java:40)
at oshi.hardware.platform.windows.WindowsHardwareAbstractionLayer.getMemory(WindowsHardwareAbstractionLayer.java:50)
at org.apache.jsp.api.cpuload_jsp._jspService(cpuload_jsp.java:62)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:745)
警告:StandardWrapperValve[jsp]:Servlet jsp的Servlet.service()引发异常
java.lang.NoSuchMethodError:com.sun.jna.IntegerType.(IJZ)V
位于com.sun.jna.platform.win32.WinDef$DWORD。(WinDef.java:135)
位于com.sun.jna.platform.win32.WinDef$DWORD。(WinDef.java:125)
位于sun.reflect.NativeConstructorAccessorImpl.newInstance0(本机方法)
位于sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
在sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
位于java.lang.reflect.Constructor.newInstance(Constructor.java:422)
位于java.lang.Class.newInstance(Class.java:442)
位于com.sun.jna.NativeMappedConverter.defaultValue(NativeMappedConverter.java:47)
位于com.sun.jna.NativeMappedConverter。(NativeMappedConverter.java:41)
位于com.sun.jna.NativeMappedConverter.getInstance(NativeMappedConverter.java:29)
位于com.sun.jna.Structure.calculateSize(Structure.java:717)
位于com.sun.jna.Structure.allocateMemory(Structure.java:251)
位于com.sun.jna.Structure.(Structure.java:153)
位于com.sun.jna.Structure.(Structure.java:143)
位于com.sun.jna.Structure.(Structure.java:139)
位于com.sun.jna.Structure.(Structure.java:130)
位于com.sun.jna.platform.win32.WinBase$memorystaturex。(WinBase.java:595)
在oshi.hardware.platform.windows.WindowsGlobalMemory.(WindowsGlobalMemory.java:40)
位于oshi.hardware.platform.windows.WindowsHardwareAbstractionLayer.getMemory(WindowsHardwareAbstractionLayer.java:50)
位于org.apache.jsp.api.cpuload_jsp._jsp服务(cpuload_jsp.java:62)
位于org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
位于javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
位于org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
位于org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
位于org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
位于javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
位于org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
位于org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
位于org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
位于org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
位于org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
位于com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
位于org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
位于org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
位于org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
在com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)上
位于com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
位于org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
位于org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
位于org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
位于org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
位于org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
在org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)上
在org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
位于org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
位于org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
位于org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
位于org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
位于org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
位于org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
位于org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
位于org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
位于org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
运行(Thread.java:745)
请建议一些解决方案。看起来您缺少两个jar文件 如果您正在使用Netbeans: 转到项目属性>库>编译>添加JAR 现在添加两个文件:- javax.json-1.0.4.jar javax.json-api-1.0.jar 你可以从这里下载,然后
有关文档参考,请查看此处:堆栈跟踪行号表示您正在使用jna-platform-4.2.2,但不知何故,您的代码在jna-4.2.2.jar之外的其他地方找到了com.sun.jna.IntegerType 尝试运行以下代码:
Class klass = com.sun.jna.IntegerType.class;
URL location = klass.getResource('/' + klass.getName().replace('.', '/') + ".class");
然后输出location.toString()并验证它是否在jna-4.2.2 jar中。你应该得到这样的结果
jar:file:/ ...path to jar... /jna-4.2.2.jar!/com/sun/jna/IntegerType.class
如果没有,您已经找到了Java的类加载器加载错误类的位置。然后找出如何从该备用lo中排除该类