『Java』JNA访问本地库，Tomcat崩溃问题

环境：B/S项目、OpenSolaris、JDK1.6、Tomcat
条件：1. 通过JNA调用本地函数（由C编写的测试库）；
      2. 通过传入参数出现异常（该库接收int参数，0为正常；非0抛出异常）。
问题：当传入0时，一切结果都和预想效果一样，没有任何错误产生；当传入1时，开始等待（底层调用的库应该在这时出异常了）等待几秒后，Tomcat服务器自动停止。请问，本地库的方法内部的异常咋办？为什么它内部有异常，Tomcat挂了？仍然用JNA的话，有没有什么解决办法？解决问题，100分重谢！

解决方案 »

  1.   

    JNI吧，这样的问题最痛苦了。
      

  2.   


    也算是JNI吧，其上的一个封装或演变，确实是JNA
      

  3.   

    tomcat 到6.0.20（最新版）为止并不支持JNI的重复加载，所以，推荐的解决办法是，你写的类库应该放到tomcat 的lib里面，
    这样就会仅仅加载native libary一次了。
      

  4.   


    请问这位朋友，能否简单扼要的说明问题？
    然后，补充一下，我遇到的不是重复加载的问题，而且也不是JNI；而是JNA调用本地库，本地库函数内部出现异常，然后Tomcat崩溃的问题。
    谢谢你的热心回复，请就问题之处讨论。
      

  5.   

    JNA底层也是要加载native的库，根据我的理解，它是对JNI的进一步封装，目前还是java.net的孵化项目，
    所以不排除是他们代码的bug。请先在重现这个错误时，检查一下你的tomcat使用的jdk或者jre的bin目录，看看下面有没有hs_err_pid*****.log类似的log文件
    如果有，这里面就记录了错误所在。如果没有，请再描述清楚点，或者贴点代码，呵呵。
      

  6.   

    JNI我也用过一次，但是没关键的方法没调用成功，帮你顶一下吧
      

  7.   

    Up java 超级群 ：有时间大家共同交流 51177847
      

  8.   


    找了半天才找到这个日志文件。。结果是在CATALINA_HOME的bin下面。。我把内容全部都贴出来吧，如下：
    #
    # An unexpected error has been detected by HotSpot Virtual Machine:
    #
    #  EXCEPTION_INT_DIVIDE_BY_ZERO (0xc0000094) at pc=0x036813c0, pid=5424, tid=1980
    #
    # Java VM: Java HotSpot(TM) Client VM (1.5.0_14-b03 mixed mode, sharing)
    # Problematic frame:
    # C  [ExceptionTest.dll+0x113c0]
    #---------------  T H R E A D  ---------------Current thread (0x008a5dd0):  JavaThread "http-8080-1" daemon [_thread_in_native, id=1980]siginfo: ExceptionCode=0xc0000094Registers:
    EAX=0x00000064, EBX=0x00000000, ECX=0x00000000, EDX=0x00000000
    ESP=0x0366ebd4, EBP=0x0366ecb8, ESI=0x0366eda0, EDI=0x0366ecb8
    EIP=0x036813c0, EFLAGS=0x00010213Top of Stack: (sp=0x0366ebd4)
    0x0366ebd4:   008a5dd0 0366eda0 00000000 cccccccc
    0x0366ebe4:   cccccccc cccccccc cccccccc cccccccc
    0x0366ebf4:   cccccccc cccccccc cccccccc cccccccc
    0x0366ec04:   cccccccc cccccccc cccccccc cccccccc
    0x0366ec14:   cccccccc cccccccc cccccccc cccccccc
    0x0366ec24:   cccccccc cccccccc cccccccc cccccccc
    0x0366ec34:   cccccccc cccccccc cccccccc cccccccc
    0x0366ec44:   cccccccc cccccccc cccccccc cccccccc Instructions: (pc=0x036813c0)
    0x036813b0:   ff eb 18 c7 45 f8 00 00 00 00 b8 64 00 00 00 99
    0x036813c0:   f7 7d f8 89 45 ec b8 01 00 00 00 5f 5e 5b 81 c4 
    Stack: [0x03630000,0x03670000),  sp=0x0366ebd4,  free space=250k
    Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
    C  [ExceptionTest.dll+0x113c0]
    C  [jna13836.tmp+0xda37]
    C  [jna13836.tmp+0x9182]
    C  [jna13836.tmp+0x2161]
    C  [jna13836.tmp+0x2849]
    j  com.sun.jna.Function.invokeInt(I[Ljava/lang/Object;)I+0
    j  com.sun.jna.Function.invoke([Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;+309
    j  com.sun.jna.Function.invoke(Ljava/lang/Class;[Ljava/lang/Object;Ljava/util/Map;)Ljava/lang/Object;+194
    j  com.sun.jna.Library$Handler.invoke(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;+344
    j  $Proxy0.doExceptionTest(I)I+19
    j  com.wolflai.action.TestAction.test(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)Lorg/apache/struts/action/ActionForward;+22
    v  ~StubRoutines::call_stub
    V  [jvm.dll+0x875dd]
    V  [jvm.dll+0xdfd96]
    V  [jvm.dll+0x874ae]
    V  [jvm.dll+0xf3f82]
    V  [jvm.dll+0xa5752]
    C  [java.dll+0x6d4f]
    j  sun.reflect.NativeMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+87
    J  sun.reflect.DelegatingMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
    J  java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
    j  org.apache.struts.actions.DispatchAction.dispatchMethod(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;Ljava/lang/String;)Lorg/apache/struts/action/ActionForward;+114
    j  org.apache.struts.actions.DispatchAction.execute(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)Lorg/apache/struts/action/ActionForward;+113
    j  org.apache.struts.actions.MappingDispatchAction.execute(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)Lorg/apache/struts/action/ActionForward;+6
    j  org.apache.struts.action.RequestProcessor.processActionPerform(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;Lorg/apache/struts/action/Action;Lorg/apache/struts/action/ActionForm;Lorg/apache/struts/action/ActionMapping;)Lorg/apache/struts/action/ActionForward;+7
    j  org.apache.struts.action.RequestProcessor.process(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+257
    j  org.apache.struts.action.ActionServlet.process(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+40
    j  org.apache.struts.action.ActionServlet.doPost(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+3
    j  javax.servlet.http.HttpServlet.service(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+139
    j  javax.servlet.http.HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+30
    j  org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+374
    j  org.apache.catalina.core.ApplicationFilterChain.doFilter(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+101
    j  org.apache.catalina.core.StandardWrapperValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+804
    j  org.apache.catalina.core.StandardContextValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+365
    j  org.apache.catalina.core.StandardHostValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+64
    j  org.apache.catalina.valves.ErrorReportValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+6
    j  org.apache.catalina.core.StandardEngineValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+42
    j  org.apache.catalina.connector.CoyoteAdapter.service(Lorg/apache/coyote/Request;Lorg/apache/coyote/Response;)V+157
    j  org.apache.coyote.http11.Http11Processor.process(Ljava/net/Socket;)V+432
    j  org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Ljava/net/Socket;)Z+82
    j  org.apache.tomcat.util.net.JIoEndpoint$Worker.run()V+41
    j  java.lang.Thread.run()V+11
    v  ~StubRoutines::call_stub
    V  [jvm.dll+0x875dd]
    V  [jvm.dll+0xdfd96]
    V  [jvm.dll+0x874ae]
    V  [jvm.dll+0x8720b]
    V  [jvm.dll+0xa2089]
    V  [jvm.dll+0x1112e8]
    V  [jvm.dll+0x1112b6]
    C  [MSVCRT.dll+0x2a3b0]
    C  [kernel32.dll+0xb683]
    未完待续...
      

  9.   


    Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
    j  com.sun.jna.Function.invokeInt(I[Ljava/lang/Object;)I+0
    j  com.sun.jna.Function.invoke([Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;+309
    j  com.sun.jna.Function.invoke(Ljava/lang/Class;[Ljava/lang/Object;Ljava/util/Map;)Ljava/lang/Object;+194
    j  com.sun.jna.Library$Handler.invoke(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;+344
    j  $Proxy0.doExceptionTest(I)I+19
    j  com.wolflai.action.TestAction.test(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)Lorg/apache/struts/action/ActionForward;+22
    v  ~StubRoutines::call_stub
    j  sun.reflect.NativeMethodAccessorImpl.invoke0(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+0
    j  sun.reflect.NativeMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;+87
    J  sun.reflect.DelegatingMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
    J  java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
    j  org.apache.struts.actions.DispatchAction.dispatchMethod(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;Ljava/lang/String;)Lorg/apache/struts/action/ActionForward;+114
    j  org.apache.struts.actions.DispatchAction.execute(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)Lorg/apache/struts/action/ActionForward;+113
    j  org.apache.struts.actions.MappingDispatchAction.execute(Lorg/apache/struts/action/ActionMapping;Lorg/apache/struts/action/ActionForm;Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)Lorg/apache/struts/action/ActionForward;+6
    j  org.apache.struts.action.RequestProcessor.processActionPerform(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;Lorg/apache/struts/action/Action;Lorg/apache/struts/action/ActionForm;Lorg/apache/struts/action/ActionMapping;)Lorg/apache/struts/action/ActionForward;+7
    j  org.apache.struts.action.RequestProcessor.process(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+257
    j  org.apache.struts.action.ActionServlet.process(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+40
    j  org.apache.struts.action.ActionServlet.doPost(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+3
    j  javax.servlet.http.HttpServlet.service(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+139
    j  javax.servlet.http.HttpServlet.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+30
    j  org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+374
    j  org.apache.catalina.core.ApplicationFilterChain.doFilter(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+101
    j  org.apache.catalina.core.StandardWrapperValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+804
    j  org.apache.catalina.core.StandardContextValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+365
    j  org.apache.catalina.core.StandardHostValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+64
    j  org.apache.catalina.valves.ErrorReportValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+6
    j  org.apache.catalina.core.StandardEngineValve.invoke(Lorg/apache/catalina/connector/Request;Lorg/apache/catalina/connector/Response;)V+42
    j  org.apache.catalina.connector.CoyoteAdapter.service(Lorg/apache/coyote/Request;Lorg/apache/coyote/Response;)V+157
    j  org.apache.coyote.http11.Http11Processor.process(Ljava/net/Socket;)V+432
    j  org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Ljava/net/Socket;)Z+82
    j  org.apache.tomcat.util.net.JIoEndpoint$Worker.run()V+41
    j  java.lang.Thread.run()V+11
    v  ~StubRoutines::call_stub
    未完待续...
      

  10.   


    ---------------  P R O C E S S  ---------------Java Threads: ( => current thread )
    =>0x008a5dd0 JavaThread "http-8080-1" daemon [_thread_in_native, id=1980]
      0x008a4d40 JavaThread "TP-Monitor" daemon [_thread_blocked, id=1984]
      0x008a3a70 JavaThread "TP-Processor4" daemon [_thread_in_native, id=1272]
      0x008a1180 JavaThread "TP-Processor3" daemon [_thread_blocked, id=8028]
      0x008a0200 JavaThread "TP-Processor2" daemon [_thread_blocked, id=6876]
      0x008a14d0 JavaThread "TP-Processor1" daemon [_thread_blocked, id=4740]
      0x00867e10 JavaThread "http-8080-Acceptor-0" daemon [_thread_in_native, id=2364]
      0x0089b060 JavaThread "ContainerBackgroundProcessor[StandardEngine[Catalina]]" daemon [_thread_blocked, id=5748]
      0x008300d0 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=5744]
      0x0082f690 JavaThread "CompilerThread0" daemon [_thread_blocked, id=7736]
      0x0082e5a0 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=1204]
      0x0082d930 JavaThread "Finalizer" daemon [_thread_blocked, id=4572]
      0x0082c6c0 JavaThread "Reference Handler" daemon [_thread_blocked, id=2264]
      0x008236c0 JavaThread "main" [_thread_in_native, id=7872]Other Threads:
      0x0082b950 VMThread [id=6960]
      0x00832bc0 WatcherThread [id=5264]VM state:not at safepoint (normal execution)VM Mutex/Monitor currently owned by a thread: NoneHeap
     def new generation   total 704K, used 581K [0x22bd0000, 0x22c90000, 0x230b0000)
      eden space 640K,  83% used [0x22bd0000, 0x22c55578, 0x22c70000)
      from space 64K,  74% used [0x22c80000, 0x22c8bfd0, 0x22c90000)
      to   space 64K,   0% used [0x22c70000, 0x22c70000, 0x22c80000)
     tenured generation   total 8496K, used 7206K [0x230b0000, 0x238fc000, 0x26bd0000)
       the space 8496K,  84% used [0x230b0000, 0x237b9a18, 0x237b9c00, 0x238fc000)
     compacting perm gen  total 8192K, used 7791K [0x26bd0000, 0x273d0000, 0x2abd0000)
       the space 8192K,  95% used [0x26bd0000, 0x2736bef0, 0x2736c000, 0x273d0000)
        ro space 8192K,  67% used [0x2abd0000, 0x2b1322c8, 0x2b132400, 0x2b3d0000)
        rw space 12288K,  47% used [0x2b3d0000, 0x2b97f6a0, 0x2b97f800, 0x2bfd0000)Dynamic libraries:
    0x00400000 - 0x0040d000  E:\Java\jdk1.5.0_14\bin\javaw.exe
    0x7c920000 - 0x7c9b4000  C:\WINDOWS\system32\ntdll.dll
    0x7c800000 - 0x7c91d000  C:\WINDOWS\system32\kernel32.dll
    0x77da0000 - 0x77e49000  C:\WINDOWS\system32\ADVAPI32.dll
    0x77e50000 - 0x77ee2000  C:\WINDOWS\system32\RPCRT4.dll
    0x77fc0000 - 0x77fd1000  C:\WINDOWS\system32\Secur32.dll
    0x77d10000 - 0x77d9f000  C:\WINDOWS\system32\USER32.dll
    0x77ef0000 - 0x77f37000  C:\WINDOWS\system32\GDI32.dll
    0x77be0000 - 0x77c38000  C:\WINDOWS\system32\MSVCRT.dll
    0x76300000 - 0x7631d000  C:\WINDOWS\system32\IMM32.DLL
    0x62c20000 - 0x62c29000  C:\WINDOWS\system32\LPK.DLL
    0x73fa0000 - 0x7400b000  C:\WINDOWS\system32\USP10.dll
    0x6d740000 - 0x6d8de000  E:\Java\jdk1.5.0_14\jre\bin\client\jvm.dll
    0x76b10000 - 0x76b3a000  C:\WINDOWS\system32\WINMM.dll
    0x6d300000 - 0x6d308000  E:\Java\jdk1.5.0_14\jre\bin\hpi.dll
    0x76bc0000 - 0x76bcb000  C:\WINDOWS\system32\PSAPI.DLL
    0x6d710000 - 0x6d71c000  E:\Java\jdk1.5.0_14\jre\bin\verify.dll
    0x6d380000 - 0x6d39d000  E:\Java\jdk1.5.0_14\jre\bin\java.dll
    0x6d730000 - 0x6d73f000  E:\Java\jdk1.5.0_14\jre\bin\zip.dll
    0x6d540000 - 0x6d553000  E:\Java\jdk1.5.0_14\jre\bin\net.dll
    0x71a20000 - 0x71a37000  C:\WINDOWS\system32\WS2_32.dll
    0x71a10000 - 0x71a18000  C:\WINDOWS\system32\WS2HELP.dll
    0x719c0000 - 0x719fe000  C:\WINDOWS\system32\mswsock.dll
    0x60fd0000 - 0x61025000  C:\WINDOWS\system32\hnetcfg.dll
    0x71a00000 - 0x71a08000  C:\WINDOWS\System32\wshtcpip.dll
    0x76ef0000 - 0x76f17000  C:\WINDOWS\system32\DNSAPI.dll
    0x76f80000 - 0x76f88000  C:\WINDOWS\System32\winrnr.dll
    0x76f30000 - 0x76f5c000  C:\WINDOWS\system32\WLDAP32.dll
    0x16080000 - 0x16099000  C:\Program Files\Bonjour\mdnsNSP.dll
    0x76d30000 - 0x76d48000  C:\WINDOWS\system32\Iphlpapi.dll
    0x76f90000 - 0x76f96000  C:\WINDOWS\system32\rasadhlp.dll
    0x10000000 - 0x10052000  E:\Apache Software Foundation\Tomcat 6.0\temp\jna13836.tmp
    0x03670000 - 0x0368b000  C:\WINDOWS\system32\ExceptionTest.dll
    0x10200000 - 0x10320000  C:\WINDOWS\WinSxS\x86_Microsoft.VC80.DebugCRT_1fc8b3b9a1e18e3b_8.0.50727.42_x-ww_f75eb16c\MSVCR80D.dllVM Arguments:
    jvm_args: -Dcatalina.home=E:\Apache Software Foundation\Tomcat 6.0 -Dcatalina.base=E:\Apache Software Foundation\Tomcat 6.0 -Djava.endorsed.dirs=E:\Apache Software Foundation\Tomcat 6.0/common/endorsed -Djava.io.tmpdir=E:\Apache Software Foundation\Tomcat 6.0\temp -Djava.library.path=E:\Java\jdk1.5.0_14\bin;E:\Apache Software Foundation\Tomcat 6.0\bin -Dsun.io.useCanonCaches=false
    java_command: org.apache.catalina.startup.Bootstrap start
    Launcher Type: SUN_STANDARDEnvironment Variables:
    JAVA_HOME=E:\Java\jdk1.5.0_14
    CLASSPATH=E:\Java\jdk1.5.0_14\lib;.
    PATH=C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Intel\DMIX;C:\Program Files\Common Files\Thunder Network\KanKan\Codecs;E:\Java\jdk1.5.0_14\bin;;E:\MySQL\MySQL Server 5.1\bin;E:\JBoss-4.2.3.GA\bin;E:\glassfish-v2.1\bin;;C:\strawberry\c\bin;C:\strawberry\perl\bin;4.564730E+219YBUILD_BASE/bin;e:\StormII\Codec;e:\StormII;E:\SSH Communications Security\SSH Secure Shell
    USERNAME=wolf.lai
    OS=Windows_NT
    PROCESSOR_IDENTIFIER=x86 Family 6 Model 15 Stepping 11, GenuineIntel
    未完待续...
      

  11.   


    谢谢这位仁兄的回复，终于可以发帖了
    ---------------  S Y S T E M  ---------------OS: Windows XP Build 2600 Service Pack 2CPU:total 2 (cores per cpu 2, threads per core 1) family 6 model 15 stepping 11, cmov, cx8, fxsr, mmx, sse, sse2Memory: 4k page, physical 2066664k(1128456k free), swap 4194303k(4194303k free)vm_info: Java HotSpot(TM) Client VM (1.5.0_14-b03) for windows-x86, built on Oct  5 2007 01:21:52 by "java_re" with MS VC++ 6.0CSDN不能上传附件么？郁闷，源码地址如下：
    http://pickup.mofile.com/1277448483222153
      

  12.   

    你发的错误日志上，已经记录了你的哪行代码出的错，大概错误是什么。一般来说，JNA调用的时候，如果参数类型（不管是出参还是入参）和你dll里定义的参数类型不匹配，就会崩溃。
    你说传入的是0或者1应该是int型的，那么你就要检查你的dll里是int型还是int指针，你可以用int或intByreference类型来试试。解决了，不要忘了给我加分。谢谢。
      

  13.   


    你好，日志里面的出错情况我知道，也是预料中的。
    那个dll的作用就是用来出现正常运行、出现异常、直接退出(dll内部调用exit())这3种情况的。
    因为真正项目中有很多库是用别人提供的，而且没有源码，其内部有可能会出现上述3种情况。
    当库中出现异常和直接退出时，Tomcat就自动关闭了。我就是想，如果库中出现异常或者直接退出，Tomcat照样正常运行。就是这样的要求。放心，解决了后，有用回复铁定加分。
      

  14.   

    这个可能不行，你那个是属于内存级错误了，在java看来是不可捕获的异常，java很多api也是jni调本地dll来实现，其实jna底层也是jni，jni用不好，虚拟机就崩，更不要说jna这种不需要编译头文件的工具包了。调第三方dll的时候，最好知道其api参数类型和返回结果。