Question

我真的需要一个人来救我。我上次非常感激，我发布了一个问题。不幸的是，同样的问题/类似的问题仍然会持续近2个月。由于这个驱动程序问题，我无法完成我的项目＆＃39;。我安装了几个J / Connectors但仍收到HTTP错误消息。所以我决定使用MySQL安装程序来安装所有组件，这次收到以下错误消息：

HTTP Status 500 - An exception occurred processing JSP page /login.jsp at line 6
type Exception report

message An exception occurred processing JSP page /login.jsp at line 6

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

exception 
org.apache.jasper.JasperException: An exception occurred processing JSP page /login.jsp at line 6

3: <%
4:  String userid = request.getParameter("uname");
5:  String pwd = request.getParameter("pass");
6:  Class.forName("com.mysql.jdbc.Driver");
7:  Connection con = DriverManager.getConnection
8:  ("jdbc:mysql://localhost:3306/REG",
9:      "root", "$jademedia247");


Stacktrace:
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:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)



root cause 
javax.servlet.ServletException: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:912)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:841)
org.apache.jsp.login_jsp._jspService(login_jsp.java:93)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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:728)



root cause 
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
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.login_jsp._jspService(login_jsp.java:72)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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:728)



note The full stack trace of the root cause is available in the Apache Tomcat/7.0.50 logs.


Apache Tomcat/7.0.50'

CLASSPATH：C：\ Program Files \ MySQL \ Connector J 5.1.28 \ mysql-connector-java-5.1.28-bin.jar; C：\ Program Files \ Apache Software Foundation \ Tomcat 7.0 \ lib \ jsp-api.jar; C：\ Program Files \ Java \ jdk1.6.0_38 \ jre \ lib

路径：C：\ Program Files \ MySQL \ MySQL Server 5.6 \ bin; C：\ Program Files \ Java \ jdk1.6.0_38 \ bin; C：\ Program Files \ Apache Software Foundation \ Tomcat 7.0 \ bin; C ：\ Program Files \ MySQL \ MySQL Utilities 1.3.6 \

的login.jsp

<%@ page import="java.io.*,java.util.*,java.sql.*" %>
<%@ page import="javax.servlet.http.*,javax.servlet.*"%>
<%
    String userid = request.getParameter("uname");
    String pwd = request.getParameter("pass");
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection
    ("jdbc:mysql://localhost:3306/REG",
        "root", "$jademedia247");
    Statement st = con.createStatement();
    ResultSet rs;
    rs = st.executeQuery("select * from members where uname='" + userid + "' and pass='" + pwd + "'");
    if (rs.next()) {
    session.setAttribute("userid", userid);
    //out.println("Welcome" + userid);
    //out.println("<a href='logout.jsp'>Log out</a>");
    response.sendRedirect("Success.jsp");
    } else {
        out.println("Invalid password <a href='form.jsp'> try again </a>");
    }
    %>

registration.jsp

<%@page import ="java.sql.*"%>
<%
user = request.getParameter("uname");
String pwd = request.getParameter("pass");
String fname = request.getParameter("fname");
String lname = request.getParameter("lname");
String email = request.getParameter("email");
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection
("jdbc:mysql://localhost:3306/REG","root", "$jademedia247");
Statement st = con.createStatement();
//ResultSet rs;
int i = st.executeUpdate("insert into members (first_Name, last_Name, email, uname, pass,     regdate) values ('" + fname + "', '" + lname + "', '" + email + "','" + user + "', '" + pwd + "', CURDATE())"); 
    if (i > 0) {
        //session.setAttribute("userid", user);
        response.sendRedirect("welcome.jsp");
        //out.print("Registration Successfull!"+"<a href='form.jsp'>Go to Login</a>");
    } else {
        response.sendRedirect("form.jsp");
    }
    %>

文件路径：C：\ Program Files \ Apache Software Foundation \ Tomcat 7.0 \ webapps \ ROOT

CREATE TABLE `members` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `first_name` varchar(45) NOT NULL,
  `last_name` varchar(45) NOT NULL,
  `email` varchar(45) NOT NULL,
  `uname` varchar(45) NOT NULL,
  `pass` varchar(45) NOT NULL,
  `regdate` date NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

刚刚创建了一个数据库REG。

Answer 1

将文件 mysql-connector-java-5.1.28-bin.jar 放在tomcat_dir/lib/内。

HTTP状态500 - 在第6行处理JSP页面/login.jsp时发生异常。（错误消息标题）

1 个答案: