老少爷们进来坐坐，看看这个问题如何解决。
问题描述：myeclipse中通过tomcat7将mysql数据库中的数据导出来时出现了问题，用的是jsp文件导出。mysql的jar文件已经导入，而且如果只写简单的jsp程序及不加载jdbc驱动这类的代码的话，是能够正常显示的不会报错。自己看了半天，还是没解决，写此贴希望大家能给点建议哈！
下面是报出异常的内容：
HTTP Status 500 - 

--------------------------------------------

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)


root cause 

javax.servlet.ServletException: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:911)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:840)
org.apache.jsp.ShowArticleTree_jsp._jspService(ShowArticleTree_jsp.java:149)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)


root cause 

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1701)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1546)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:126)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:169)
org.apache.jsp.ShowArticleTree_jsp._jspService(ShowArticleTree_jsp.java:107)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)


note The full stack trace of the root cause is available in the Apache Tomcat/7.0.26 logs.


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Apache Tomcat/7.0.26

------解决方案--------------------
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
都提示你了，找不到mysql的驱动包
------解决方案--------------------
导入mysql 驱动jar
------解决方案--------------------
mysql -connector-java-5.1.0-bin.jar 是否放在 lib文件夹下 这个文件夹是提供程序运行时的jar

------解决方案--------------------
org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

很明显是木有导入mysql-connection-java.jar包。。


可选择不注册下载。。
http://www.mysql.com/downloads/connector/j/
------解决方案--------------------