在下面的代碼中我有兩個文件。一個用於我的數據庫連接，另一個用於我的基於html的jsp文件。我正在嘗試檢查我的數據庫的版本並將其打印到屏幕上。我正在嘗試返回CheckVersion的值，並使用out.println將其放在網頁上。由於servlet錯誤無法建立數據庫連接
我收到以下錯誤。
type Exception report
message
descriptionThe server encountered an internal error() that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP
PWC6199: Generated servlet error: package com.sun.xml.rpc.processor.modeler.j2ee.xml does not exist
PWC6199: Generated servlet error: package databaseFiles does not exist
PWC6197: An error occurred at line: 18 in the jsp file: /index.jsp PWC6199: Generated servlet error: cannot find symbol symbol: class DatabaseManagement location: class org.apache.jsp.index_jsp
PWC6197: An error occurred at line: 18 in the jsp file: /index.jsp PWC6199: Generated servlet error: cannot find symbol symbol: class DatabaseManagement location: class org.apache.jsp.index_jsp
我在做什麼錯？我正在使用netbeans，它不報告我創建文件的方式有任何問題。 index.jsp位於根區域，我創建了一個名爲databaseFiles的文件夾，它持有我的DatabaseManagement.java文件。
謝謝。
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package databaseFiles;
import com.sun.corba.se.impl.util.Version;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author Aaron
*/
public class DatabaseManagement {
private final String urlDB = "jdbc:mysql://correct:3306/javaBBS";
private final String userDB = "correct";
private final String passwordDB = "correct";
Connection conDB = null;
Statement st = null;
ResultSet rs = null;
/*
*
*
*/
public DatabaseManagement() {
}
/*
*
*/
public void OpenConnection()
{
try {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch(Exception e) {
System.out.println("Could not load database driver");
}
conDB = DriverManager.getConnection(urlDB, userDB, passwordDB);
} catch(SQLException ex) {
Logger lgr = Logger.getLogger(Version.class.getName());
lgr.log(Level.SEVERE, ex.getMessage(), ex);
}
}
/*
* Closes the current database object
*/
public void CloseConnection() {
try {
if (rs != null) {
rs.close();
}
if (st != null) {
st.close();
}
if (conDB != null) {
conDB.close();
}
} catch (SQLException ex) {
Logger lgr = Logger.getLogger(Version.class.getName());
lgr.log(Level.WARNING, ex.getMessage(), ex);
}
}
/**
* Checks the database version
*/
public String CheckVersion() throws SQLException {
try {
st = conDB.createStatement();
rs = st.executeQuery("SELECT VERSION()");
} catch(Exception e) {
System.out.println("Could not get the version of the DB.");
}
if (rs.next()) {
System.out.println(rs.getString(1));
}
return rs.getString(1);
}
}
以下是index.jsp。
<%--
Document : index
Created on : May 30, 2013, 1:48:03 PM
Author : Aaron
--%>
<%@page import="com.sun.xml.rpc.processor.modeler.j2ee.xml.string"%>
<%@page import="databaseFiles.DatabaseManagement"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>Hello World!</h1>
<%
out.println("<br/>Your IP address is " + request.getRemoteAddr());
String userAgent = request.getHeader("user-agent");
String browser = "unknown";
out.print("<br/>and your browser is ");
if (userAgent != null) {
if (userAgent.indexOf("MSIE") > -1) {
browser = "MS Internet Explorer";
}
else if (userAgent.indexOf("Firefox") > -1) {
browser = "Mozilla Firefox";
}
else if (userAgent.indexOf("Opera") > -1) {
browser = "Opera";
}
else if (userAgent.indexOf("Chrome") > -1) {
browser = "Google Chrome";
}
else if (userAgent.indexOf("Safari") > -1) {
browser = "Apple Safari";
}
}
out.println(browser);
DatabaseManagement dbConnector = new DatabaseManagement();
dbConnector.OpenConnection();
out.println(dbConnector.CheckVersion());
dbConnector.CloseConnection();
%>
</body>
</html>
你可以發佈'index.jsp'嗎？我認爲它可能缺少一個導入聲明。 – austin
@austin我已經更新了上面的內容來打破它們。對於那個很抱歉。沒有意識到它把這兩個文件合併爲一個大項目。 – ILikeTurtles