connection tip mysql error
HejsaJeg er igang med at lave en connection fra min JSP side til min MYSQL database. Min database hedder "shop". Her er min kode:
<%@page import="java.sql.*" %>
<%! public static Connection connect() {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
return DriverManager.getConnection("jdbc:mysql://localhost/shop", "root", " ");
} catch(Exception e) {
throw new Error(e);
}
}
public static boolean close(Connection c) {
try {
c.close();
return true;
} catch(Exception e) {
return false;
}
}%>
<%@ page language="java" contentType="text/html; charset=US-ASCII"
pageEncoding="US-ASCII"%><!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=US-ASCII">
<title>Insert title here</title>
</head>
<body>
<%
Connection c = connect();
out.print(c);
close(c);
%>
</body>
</html>
Når jeg kører dette, får jeg følgende fejl på exception:
type Exception report
message An exception occurred processing JSP page /index.jsp at line 7
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 7
4: Class.forName("com.mysql.jdbc.Driver").newInstance();
5: return DriverManager.getConnection("jdbc:mysql://localhost/shop", "root", " ");
6: } catch(Exception e) {
7: throw new Error(e);
8: }
9: }
10: public static boolean close(Connection c) {
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.Error: 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.index_jsp._jspService(index_jsp.java:107)
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.Error: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.jsp.index_jsp.connect(index_jsp.java:24)
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: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:1714)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
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:171)
org.apache.jsp.index_jsp.connect(index_jsp.java:21)
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: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/7.0.42 logs.
Min SQL server kører på computeren, og når jeg tester forbindelsen i workbench, så er den ok. Jeg har ikke noget password på min database. Jeg har prøvet med:
return DriverManager.getConnection("jdbc:mysql://localhost/shop", "root", " ");
return DriverManager.getConnection("jdbc:mysql://127.0.0.1/shop", "root", " ");
return DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/shop", "root", " ");
men ikke noget af det virker. Er der nogle som har en ide til hvad det kan være?
mvh Mads
