java.lang.ClassNotFoundException:oracle.jdbc.driver.OracleDriver
我编写了一个JavaServlet程序，但当我运行它时，它显示了异常java.lang.ClassNotFoundException:oracle.jdbc.driver.OracleDriver,java,servlets,jdbc,tomcat7,Java,Servlets,Jdbc,Tomcat7,我编写了一个JavaServlet程序，但当我运行它时，它显示了异常 java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver 我的代码是 package skypark; import java.io.*; import javax.servlet.*; import java.text.*; import javax.servlet.http.*; import java.sql.*; import java.sq
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
package skypark;
import java.io.*;
import javax.servlet.*;
import java.text.*;
import javax.servlet.http.*;
import java.sql.*;
import java.sql.Date;
public class Registration extends HttpServlet {
private static final long serialVersionUID = 1L;
public static Connection prepareConnection() throws ClassNotFoundException, SQLException {
String dcn = "oracle.jdbc.driver.OracleDriver";
String url = "jdbc:oracle:thin:@JamesPJ-PC:1521:skypark";
String usname = "system";
String pass = "tiger";
Class.forName(dcn);
return DriverManager.getConnection(url, usname, pass);
}
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
try {
String phone1, dofb, date1, month, year, uname, fname, lname, address, city, state, country;
String pin, email, password, gender, lang, qual, relegion, privacy, hobbies, fav;
uname = req.getParameter("uname");
fname = req.getParameter("fname");
lname = req.getParameter("lname");
date1 = req.getParameter("date");
month = req.getParameter("month");
year = req.getParameter("year");
address = req.getParameter("address");
city = req.getParameter("city");
state = req.getParameter("state");
country = req.getParameter("country");
pin = req.getParameter("pin");
email = req.getParameter("email");
password = req.getParameter("password");
gender = req.getParameter("gender");
phone1 = req.getParameter("phone");
lang = "";
qual = "";
relegion = "";
privacy = "";
hobbies = "";
fav = "";
dofb = date1 + "-" + month + "-" + year;
int phone = Integer.parseInt(phone1);
DateFormat formatter;
java.util.Date dob;
formatter = new SimpleDateFormat("dd-MM-yy");
dob = formatter.parse(dofb);
Connection con = prepareConnection();
String Query = "Insert into regdetails values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
PreparedStatement ps = con.prepareStatement(Query);
ps.setString(1, uname);
ps.setString(2, fname);
ps.setString(3, lname);
ps.setDate(4, (Date) dob);
ps.setString(5, address);
ps.setString(6, city);
ps.setString(7, state);
ps.setString(8, country);
ps.setString(9, pin);
ps.setString(10, lang);
ps.setString(11, qual);
ps.setString(12, relegion);
ps.setString(13, privacy);
ps.setString(14, hobbies);
ps.setString(15, fav);
ps.setString(16, gender);
int c = ps.executeUpdate();
String query = "insert into passmanager values(?,?,?,?)";
PreparedStatement ps1 = con.prepareStatement(query);
ps1.setString(1, uname);
ps1.setString(2, password);
ps1.setString(3, email);
ps1.setInt(4, phone);
int i = ps1.executeUpdate();
if (c == 1 || c == Statement.SUCCESS_NO_INFO && i == 1 || i == Statement.SUCCESS_NO_INFO) {
out.println("<html><head><title>Login</title></head><body>");
out.println("<center><h2>Skypark.com</h2>");
out.println("<table border=0><tr>");
out.println("<td>UserName/E-Mail</td>");
out.println("<form action=login method=post");
out.println("<td><input type=text name=uname></td>");
out.println("</tr><tr><td>Password</td>");
out.println("<td><input type=password name=pass></td></tr></table>");
out.println("<input type=submit value=Login>");
out.println("</form></body></html>");
} else {
out.println("<html><head><title>Error!</title></head><body>");
out.println("<center><b>Given details are incorrect</b>");
out.println(" Please try again</center></body></html>");
RequestDispatcher rd = req.getRequestDispatcher("registration.html");
rd.include(req, resp);
return;
}
} catch (ClassNotFoundException cnfe) {
out.println("<html><head><title>Error!</title><body>");
out.println("<b><i>Class not found " + cnfe + "</i></b>");
out.println("</body></html>");
} catch (SQLException sqle) {
out.println("<html><head><title>Error!</title><body>");
out.println("<b><i>Unable to process try after some time Sql error</i></b>");
out.println("</body></html>");
} catch (ParseException e) {
out.println("<html><head><title>Error!</title><body>");
out.println("<b><i>Unable to process Parseint exc " + e + "</i></b>");
out.println("</body></html>");
}
out.flush();
out.close();
}
}
java oracle.jdbc.driver.OracleDriver
Error: Main method not found in class oracle.jdbc.driver.OracleDriver, please define the main method as:
public static void main(String[] args)
您已经在web应用程序的lib文件夹中复制了classes12.jar，并在eclipse中设置了类路径 在包资源管理器中右键单击项目 生成路径->添加外部存档 选择ojdbc6.jar归档文件 按OK 或 仔细阅读，仔细做 现在应该在包资源管理器下的“引用的库”中引用该库。
现在再次尝试运行您的程序。通过
C:\apache-tomcat-7.0.47\libojdbc14.jar然后在eclipse中重新启动服务器，然后在服务器上运行应用程序我遇到了类似的错误，但在将ojdbc14.jar复制到lib文件夹后，没有其他异常。（从某处复制ojdbc14.jar并将其粘贴到WebContent内的lib文件夹中。）我遇到了同样的问题，但通过执行以下操作可以修复它： 右键单击项目->属性，然后在部署程序集中添加JAR（odjbc6或14）文件。我也得到了同样的结果 有点错误，但之后 复制 将ojdbc14.jar转换为lib 文件夹，没有了 例外情况（副本） 来自的ojdbc14.jar 在某处粘贴 将其保存到lib文件夹中 内部网络内容。）团队！ 要从Servlet执行SQL查询，您应该在文件夹中添加JDBCJAR库
WEB-INF/lib
Class.forName("oracle.jdbc.OracleDriver");
==>73 尝试通过服务器库“C:\apache-tomcat-7.0.47\lib”添加ojdbc6.jar
然后在eclipse中重新启动服务器。是的，我复制了classes12.jar ad ojdbc14.jar您使用的是哪个oracle版本8i或10g我使用的是oracle 11g r2，然后使用ojdbc6.jar并删除classes12.jar和ojdbc14.jar以及Class.forName（“oracle.jdbc.OracleDriver”）；看到这里，我将lib文件夹中的jar文件更改为ojdbc6，将class.forName更改为oracle.jdbc.OracleDriver，现在它还显示了java.lang.ClassNotFoundException:oracle.jdbc.oracledriverRoracedriver不包含main方法。如果没有相应的容器（如tomcat），则无法启动servlet。。。调用
java-oracle.jdbc.driver.OracleDriverClass.forName("oracle.jdbc.OracleDriver");