webservice 问题，求大神帮忙

我是用JDK的wsimport方式创建的webservice，写的demo没有问题，但是一操作数据库，就报错500，但是服务端也就是简单的操作，代码肯定没有问题，还是需要配置什么东西？我是在springMVC里写的客户端与服务端，数据库mybatis，

是eclipse 问题，工具具备的jar 有些丢失，下载个绿色版，代码是没问题的。加入 servlet-api.jar 就刷新一下，就好了.

 九月 18, 2017 1:38:23 下午 com.sun.xml.internal.ws.server.sei.TieHandler createResponse
严重: null
java.lang.NullPointerException
    at com.bjhnd.Service.DatacenterMiddle.DatacenterMiddle.save(DatacenterMiddle.java:23)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.sun.xml.internal.ws.api.server.MethodUtil.invoke(MethodUtil.java:68)
    at com.sun.xml.internal.ws.api.server.InstanceResolver$1.invoke(InstanceResolver.java:235)
    at com.sun.xml.internal.ws.server.InvokerTube$2.invoke(InvokerTube.java:134)
    at com.sun.xml.internal.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:73)
    at com.sun.xml.internal.ws.api.pipe.Fiber.__doRun(Fiber.java:1121)
    at com.sun.xml.internal.ws.api.pipe.Fiber._doRun(Fiber.java:1035)
    at com.sun.xml.internal.ws.api.pipe.Fiber.doRun(Fiber.java:1004)
    at com.sun.xml.internal.ws.api.pipe.Fiber.runSync(Fiber.java:862)
    at com.sun.xml.internal.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:404)
    at com.sun.xml.internal.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:706)
    at com.sun.xml.internal.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:260)
    at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handleExchange(WSHttpHandler.java:98)
    at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handle(WSHttpHandler.java:82)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:83)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:82)
    at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:675)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:647)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

九月 18, 2017 1:38:23 下午 com.sun.xml.internal.ws.transport.http.HttpAdapter$HttpToolkit handle
严重: Unknown JAXBContext implementation: class com.sun.xml.bind.v2.runtime.JAXBContextImpl
com.sun.xml.internal.ws.spi.db.DatabindingException: Unknown JAXBContext implementation: class com.sun.xml.bind.v2.runtime.JAXBContextImpl
    at com.sun.xml.internal.ws.spi.db.BindingContextFactory.getJAXBFactory(BindingContextFactory.java:192)
    at com.sun.xml.internal.ws.spi.db.BindingContextFactory.create(BindingContextFactory.java:134)
    at com.sun.xml.internal.ws.message.jaxb.JAXBMessage.create(JAXBMessage.java:152)
    at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createSOAP11Fault(SOAPFaultBuilder.java:424)
    at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createSOAPFaultMessage(SOAPFaultBuilder.java:201)
    at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createSOAPFaultMessage(SOAPFaultBuilder.java:189)
    at com.sun.xml.internal.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:411)
    at com.sun.xml.internal.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:706)
    at com.sun.xml.internal.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:260)
    at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handleExchange(WSHttpHandler.java:98)
    at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handle(WSHttpHandler.java:82)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:83)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:82)
    at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:675)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79)
    at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:647)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)