JSP页面报错：org.apache.jasper.JasperException

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本文记录了一次使用JSP页面尝试连接MySQL数据库时遇到的问题，出现HTTP状态500错误，提示无法找到JDBC驱动类。文章详细展示了错误堆栈跟踪，并探讨了可能的解决方法。

今天试图从前台JSP页面提交数据到数据库，报了个这样的错，我以为是JDBC连接MYSQL的JAR包没有加的原因，加上JAR包还是这样：

HTTP Status 500 - An exception occurred processing JSP page /index.jsp at line 12

type Exception report

message An exception occurred processing JSP page /index.jsp at line 12

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

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 12

9: 
10:


11:  
12: 
15:  


Stacktrace:
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
root cause

javax.servlet.ServletException: javax.servlet.jsp.JspTagException: In <driver>, invalid driver class name: "java.lang.ClassNotFoundException: com.mysql.jdbc.Driver"
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:864)
	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:797)
	org.apache.jsp.index_jsp._jspService(index_jsp.java:126)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
root cause

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
	java.lang.Class.forName0(Native Method)
	java.lang.Class.forName(Class.java:270)
	org.apache.taglibs.standard.tag.common.sql.DataSourceWrapper.setDriverClassName(DataSourceWrapper.java:84)
	org.apache.taglibs.standard.tag.common.sql.SetDataSourceTagSupport.doStartTag(SetDataSourceTagSupport.java:140)
	org.apache.jsp.index_jsp._jspx_meth_sql_005fsetDataSource_005f0(index_jsp.java:152)
	org.apache.jsp.index_jsp._jspService(index_jsp.java:91)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.41 logs.