作为Jsp的初学者，我正在构建一个注册/登录用户的简单Web应用程序 . 当我运行以下代码时，我收到以下错误HTTP状态500 - 内部服务器错误在eclipse和Web服务器中构建Web应用程序是tomcat . 我还下载并添加了jar文件 . 不知道出了什么问题，在谷歌上找不到任何有用的答案 . 我在项目中的JSP（一个用于登录，另一个用于注册）文件中收到相同的错误 .
register.jsp文件：
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%@ page import ="java.sql.*" %>
<%@ page import ="javax.sql.*" %>
<%
String user=request.getParameter("userid");
session.putValue("userid",user);
String pass=request.getParameter("pass");
String fname=request.getParameter("fname");
String lname=request.getParameter("lname");
String email=request.getParameter("email");
Class.forName("com.mysql.jdbc.Driver");
java.sql.Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/pms","root","root");
Statement st=con.createStatement();
ResultSet rs;
int i= st.executeUpdate("insert into users values("+user+","+pass+","+fname+","+lname+","+email+")");
out.println("Registered");
%>
<a href="Login.html">Login</a></br>
<a href="Comp.html">Home</a></br>
</body>
</html>
错误：
HTTP Status 500 – Internal Server Error
Type Exception Report
Message An exception occurred processing [/register.jsp] at line [19]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: An exception occurred processing [/register.jsp] at line [19]
16: String fname=request.getParameter("fname");
17: String lname=request.getParameter("lname");
18: String email=request.getParameter("email");
19: Class.forName("com.mysql.jdbc.Driver");
20: java.sql.Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/pms","root","root");
21: Statement st=con.createStatement();
22: ResultSet rs;
1 回答
确保在tomcat bin文件夹中有数据库驱动程序（MySql jar文件） . 重启tomcat，然后重试 .