商品信息沒有出來,后臺報(bào)了錯誤
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
?? ?at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333)
?? ?at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
?? ?at java.lang.Class.forName0(Native Method)
?? ?at java.lang.Class.forName(Unknown Source)
?? ?at util.DBHelper.<clinit>(DBHelper.java:21)
?? ?at dao.ItemsDAO.getAllItems(ItemsDAO.java:19)
?? ?at org.apache.jsp.index_jsp._jspService(index_jsp.java:173)
?? ?at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
?? ?at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
?? ?at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
?? ?at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
?? ?at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
?? ?at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
?? ?at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
?? ?at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
?? ?at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
?? ?at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
?? ?at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
?? ?at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
?? ?at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
?? ?at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
?? ?at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
?? ?at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
?? ?at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
?? ?at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
?? ?at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
?? ?at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
?? ?at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
?? ?at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
?? ?at java.lang.Thread.run(Unknown Source)
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/shopping?useUnicode=true&characterEncoding=UTF-8
?? ?at java.sql.DriverManager.getConnection(Unknown Source)
?? ?at java.sql.DriverManager.getConnection(Unknown Source)
?? ?at util.DBHelper.getConnection(DBHelper.java:34)
?? ?at dao.ItemsDAO.getAllItems(ItemsDAO.java:19)
?? ?at org.apache.jsp.index_jsp._jspService(index_jsp.java:173)
?? ?at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
?? ?at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
?? ?at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
?? ?at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
?? ?at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
?? ?at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
?? ?at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
?? ?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
?? ?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
?? ?at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
?? ?at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
?? ?at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
?? ?at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
?? ?at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
?? ?at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
?? ?at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
?? ?at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
?? ?at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
?? ?at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
?? ?at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
?? ?at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
?? ?at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
?? ?at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
?? ?at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
?? ?at java.lang.Thread.run(Unknown Source)
2018-01-11
可能是mysql的jar包沒有導(dǎo)入。
jar包導(dǎo)入:
1、把mysql-connector-java-5.0.5-bin.jar(或其他版本)復(fù)制到項(xiàng)目的\WEB-INF\lib\下;
2、項(xiàng)目右鍵-Properties - Java Build Path - Libraries-Add JARS...選擇jar包導(dǎo)入,點(diǎn)擊OK;