Java Web Servlet 调用DLL

Question

用VC写了个DLL ，在普通的java类里能成功加载dll 并调用里面的函数。 但是在servlet里，dll加载了，但是调用其中的函数时就报错代码如下：public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{System.out.println("DeviveControlServlet开始执行！！！");  System.loadLibrary("ParseProtocol");  System.out.println("dll加载完毕！！！");  GetDeviceObjct("192.168.3.100", 8000, 11001);//这里报错，普通java类里正常执行  System.out.println("getdeviceobject函数执行完毕！！！");}

Answer 1

DeviveControlServlet开始执行！！！
dll加载完毕！！！
2012-8-6 16:29:18 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet DeviceControlServlet threw exception
java.lang.UnsatisfiedLinkError: sea.web.controller.DeviceControlServlet.GetDeviceObjct(Ljava/lang/String;II)I
at sea.web.controller.DeviceControlServlet.GetDeviceObjct(Native Method)
at sea.web.controller.DeviceControlServlet.doGet(DeviceControlServlet.java:31)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
上面是完整错误信息，根据错误信息提示好像是连接错误，但是dll那条代码是执行过了的，没有提示说找不到dll,就是调用dll里的函数才报错， 而另外写个普通的java类，就不报错，能正常执行