java.sql.SQLException: Field ‘userid’ doesn’t have a default value Query: INSERT INTO users(username,password,phonenumber,email) Values (?,?,?,?) Parameters: [qwe, qwe, qwe, qwe] at org.apache.commons.dbutils.QueryRunner.rethrow(QueryRunner.java:542) at org.apache.commons.dbutils.QueryRunner.update(QueryRunner.java:599) at com.smartcity.mvc.dao.DAO.update(DAO.java:39) at com.smartcity.mvc.dao.impl.UserDAOimpl.save(UserDAOimpl.java:16) at com.smartcity.mvc.servlet.UserServlet.register(UserServlet.java:73) 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:498) at com.smartcity.mvc.servlet.UserServlet.doPost(UserServlet.java:35) at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol ConnectionHandler.process(AbstractProtocol.java:767)atorg.apache.tomcat.util.net.NioEndpoint SocketProcessor.doRun(NioEndpoint.java:1347) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor Worker.run(ThreadPoolExecutor.java:617)atorg.apache.tomcat.util.threads.TaskThread WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)
连接的数据库userid没有设置自增，导致没有默认的值，执行sql会失败
