Stacktrace:org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:524)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:417)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.servlet.ServletException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureLast packet sent to the server was 0 ms ago.org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:850)org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:779)org.apache.jsp.catalog.wenyi_jsp._jspService(wenyi_jsp.java:185)org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureLast packet sent to the server was 0 ms ago.sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)java.lang.reflect.Constructor.newInstance(Constructor.java:513)com.mysql.jdbc.Util.handleNewInstance(Util.java:406)com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2103)com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)java.lang.reflect.Constructor.newInstance(Constructor.java:513)com.mysql.jdbc.Util.handleNewInstance(Util.java:406)com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)java.sql.DriverManager.getConnection(DriverManager.java:582)java.sql.DriverManager.getConnection(DriverManager.java:185)dao.BaseDAO.getConnection(BaseDAO.java:15)dao.CategoryDao.select(CategoryDao.java:20)dao.CategoryDao.getCategory(CategoryDao.java:85)org.apache.jsp.catalog.wenyi_jsp._jspService(wenyi_jsp.java:140)org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.servlet.ServletException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureLast packet sent to the server was 0 ms ago.org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:850)org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:779)org.apache.jsp.catalog.wenyi_jsp._jspService(wenyi_jsp.java:185)org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureLast packet sent to the server was 0 ms ago.sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)java.lang.reflect.Constructor.newInstance(Constructor.java:513)com.mysql.jdbc.Util.handleNewInstance(Util.java:406)com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2103)com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)java.lang.reflect.Constructor.newInstance(Constructor.java:513)com.mysql.jdbc.Util.handleNewInstance(Util.java:406)com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)java.sql.DriverManager.getConnection(DriverManager.java:582)java.sql.DriverManager.getConnection(DriverManager.java:185)dao.BaseDAO.getConnection(BaseDAO.java:15)dao.CategoryDao.select(CategoryDao.java:20)dao.CategoryDao.getCategory(CategoryDao.java:85)org.apache.jsp.catalog.wenyi_jsp._jspService(wenyi_jsp.java:140)org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
