附上调试报告
怎么修改？？？
type Exception report
message An exception occurred processing JSP page /WebContent/add.jsp at line 106
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 /WebContent/add.jsp at line 106
103:
104: j=stmt.executeUpdate();
105: }}catch(Exception e){}
106: conn.close();
107:
108:
109: %>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:575)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:477)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.lang.NullPointerException
org.apache.jsp.WebContent.add_jsp._jspService(add_jsp.java:189)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.69 logs.
是不是conn为空？
add.jsp 第 106 行
错误： The server encountered an internal error that prevented it from fulfilling this request.
conn.close();
先判断一下是否为空
if(conn!=null){
conn.close();
}
不为空在关闭，不过你的错误应该是conn空了，你数据库链接没成功
应该没有引入java.sql.* 这个jar包的吧
怎么可以在页面里操作数据库？