Tomcat Netbeans 数据源无效：“java.sql.SQLException：找不到适合 jdbc 的驱动程序

Question

我只是按照在 Netbeans 页面上使用 MySQL 数据库创建简单 Web 应用程序的做法，遇到了错误。

我无法使用 glassfish 运行我的初始步骤，因此安装了 tomcat，它对于更简单的版本运行良好。添加 MySQL 数据库后。如文档所述，我已经使用 Netbeans glassfish 功能定义了一个 JDBC 资源。但是我在 web.xml 和 glassfish-resources.xml 下引用了这些资源，我遇到了错误。

我认为我应该以不同于教程显示的任何方式来定义 tomcat 的 jdbc 源，但我是新手并且没有太多背景。

如果您能给我一些想法或参考文档，对于新手来说很容易理解，我将不胜感激。

这是日志文件。

TTP 状态 500 - 在第 9 行处理 JSP 页面 /index.jsp 时发生异常 类型异常报告 消息在第 9 行处理 JSP 页面 /index.jsp 时发生异常 描述服务器遇到了一个内部错误，导致它无法完成这个请求。

异常 org.apache.jasper.JasperException：在第 9 行处理 JSP 页面 /index.jsp 时发生异常
6：作者：XXX
7：--%>
8：
9：
10: SELECT subject_id, name FROM subject
11：
12：

堆栈跟踪：

org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

根本原因

javax.servlet.ServletException: javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "java.sql.SQLException: No suitable driver found for jdbc/IFPNEW"
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:906)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:835)
org.apache.jsp.index_jsp._jspService(index_jsp.java:153)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

根本原因

javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "java.sql.SQLException: No suitable driver found for jdbc/IFPNEW"
org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(QueryTagSupport.java:318)
org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(QueryTagSupport.java:201)
org.apache.jsp.index_jsp._jspx_meth_sql_005fquery_005f0(index_jsp.java:175)
org.apache.jsp.index_jsp._jspService(index_jsp.java:89)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

context.xml

       <?xml version="1.0" encoding="UTF-8"?>
<Context antiJARLocking="true" path="/tompool">
  <!-- maxActive: Maximum number of database connections in pool. Make sure you
         configure your mysqld max_connections large enough to handle
         all of your db connections. Set to -1 for no limit.
         -->
  <!-- maxIdle: Maximum number of idle database connections to retain in pool.
         Set to -1 for no limit.  See also the DBCP documentation on this
         and the minEvictableIdleTimeMillis configuration parameter.
         -->
  <!-- maxWait: Maximum time to wait for a database connection to become available
         in ms, in this example 10 seconds. An Exception is thrown if
         this timeout is exceeded.  Set to -1 to wait indefinitely.
         -->
  <!-- username and password: MySQL username and password for database connections  -->
  <!-- driverClassName: Class name for the old mm.mysql JDBC driver is
         org.gjt.mm.mysql.Driver - we recommend using Connector/J though.
         Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver.
         -->
  <!-- url: The JDBC connection url for connecting to your MySQL database.
         -->
  <Resource auth="Container" driverClassName="com.mysql.jdbc.Driver" maxActive="100" maxIdle="30" maxWait="10000" name="jdbc/IFPNEW" password="...." type="javax.sql.ConnectionPoolDataSource" url="jdbc:mysql://localhost:3306/connpool" username="....."/>
</Context>

Answer 1

试试

type="javax.sql.DataSource"

代替

type="javax.sql.ConnectionPoolDataSource"

另请参阅此帖子：DataSource or ConnectionPoolDataSource for Application Server JDBC resources