mysql连接 ClassNotFound的问题

yuanjian0211 2005-05-15 11:54:13

环境：Tomcat 5.0.16

1、我下载的驱动为mysql-connector-java-3.0.9-stable.zip，解压缩后得到mysql-connector-java-3.0.9-stable-bin.jar

2、我将mysql-connector-java-3.0.9-stable-bin.jar放在目录：D:\tools\tomcat-5.0.16\Tomcat 5.0\webapps\ROOT\myworkplace\WEB-INF\lib下面；另外我在环境变量里也作了设置，将D:\tools\tomcat-5.0.16\Tomcat 5.0\webapps\ROOT\myworkplace\WEB-INF\lib\mysql-connector-java-3.0.9-stable-bin.jar放在了Path下面

3、我的连接测试代码如下：

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<%Class.forName("com.mysql.jdbc.Driver").newInstance();
String url ="jdbc:mysql://localhost:3306/mytest?user=root&password=&useUnicode=true&characterEncoding=8859_1";
Connection conn= DriverManager.getConnection(url);
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql="select * from user_info";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {%>
您的第一个字段内容为：<%=rs.getString(1)%>
您的第二个字段内容为：<%=rs.getString(2)%>
<%}%>
<%out.print("数据库操作成功，恭喜你");%>
<%rs.close();
stmt.close();
conn.close();
%>
</body>
</html>

出现的错误：

exception

javax.servlet.ServletException: com.mysql.jdbc.Driver
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:867)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:800)
org.apache.jsp.npis.mytest_jsp._jspService(mytest_jsp.java:74)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

root cause

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1366)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1213)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:184)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:110)
java.lang.ClassLoader.loadClassInternal(Unknown Source)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Unknown Source)
org.apache.jsp.npis.mytest_jsp._jspService(mytest_jsp.java:42)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

note The full stack trace of the root cause is available in the Tomcat logs.

另外，怎么辨别mysql的驱动是COM还是MM?

恳请大虾指点啊！

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