我的項目沒有使用任何IDE。

整個編碼使用Textpad完成。

所以我需要幫助連接sql server數據庫和我的項目。

這是bean類，其中編寫了用于數據庫連接的業務邏輯。

我已經安裝了SQL服務器并使用Windows身份驗證創建了一個名為“vt”的數據庫。

我甚至為數據庫創建了dsn，即vtdsn。但仍然沒有找到課程的例外。

請幫忙。

M卡在這里。

之前它在我使用MS Access進行數據庫時工作正常。

但是在使用SQL服務器進行數據庫連接時我需要做些什么改變

package ankit;

import java.sql.*;

public class RegisterBean {

private Connection con;

private PreparedStatement pst;

private ResultSet rs;

private String myfirstname, mylastname, myemail, mypassword, dateofbirth, gender, college, address;

//code for setter and getter method. removed to shorten the code//

public RegisterBean() {

System.out.println("Default constructor of RegisterBean is called");

}

public void makeConnection() {

try {

Class.forName("com.mysql.jdbc.Driver");

con = DriverManager.getConnection("jdbc:odbc:vtdsn");

} catch (Exception e) {

System.out.println("Error in making connection ");

e.printStackTrace();

}

}

public boolean checkRegistration(String fN, String lN, String email, String pwd, String dob, String gender, String coll, String addr) {

boolean flag;

makeConnection();

try {

pst = con.prepareStatement("insert into studentdetail values(?,?,?,?,?,?,?,?)");

pst.setString(1, fN);

pst.setString(2, lN);

pst.setString(3, email);

pst.setString(4, pwd);

pst.setString(5, dob);

pst.setString(6, gender);

pst.setString(7, coll);

pst.setString(8, addr);

int i = pst.executeUpdate();

System.out.println(i);

if (i >= 1) {

flag = true;

} else {

flag = false;

}

} catch (Exception e) {

flag = false;

e.printStackTrace();

}

return flag;

}

}

將驅動程序添加到我的java bean類文件所在的Tomcat的classes文件夾中

并將驅動程序添加到jre / lib和jre / lib / ext文件夾中。

現在收到此錯誤

Error in making connection

java.sql.SQLException: No suitable driver found for jdbc:sqlserver://localhost/S

QLEXPRESS/Databases/vt:1433;

at java.sql.DriverManager.getConnection(DriverManager.java:604)

at java.sql.DriverManager.getConnection(DriverManager.java:243)

at ankit.RegisterBean.makeConnection(RegisterBean.java:113)

at ankit.RegisterBean.checkRegistration(RegisterBean.java:124)

at org.apache.jsp.components.jsp.RegisterDataBase_jsp._jspService(Regist

erDataBase_jsp.java:117)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper

.java:432)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3

90)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl

icationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF

ilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV

alve.java:222)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV

alve.java:123)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j

ava:171)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j

ava:99)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:

953)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal

ve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav

a:408)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp

11Processor.java:1023)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(

AbstractProtocol.java:589)

at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoin

t.java:1852)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.

java:1110)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor

.java:603)

at java.lang.Thread.run(Thread.java:722)

java.lang.NullPointerException

at ankit.RegisterBean.checkRegistration(RegisterBean.java:127)

at org.apache.jsp.components.jsp.RegisterDataBase_jsp._jspService(Regist

erDataBase_jsp.java:117)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper

.java:432)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3

90)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl

icationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF

ilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV

alve.java:222)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV

alve.java:123)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j

ava:171)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j

ava:99)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:

953)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal

ve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav

a:408)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp

11Processor.java:1023)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(

AbstractProtocol.java:589)

at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoin

t.java:1852)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.

java:1110)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor

.java:603)

at java.lang.Thread.run(Thread.java:722)

false

解決：

解決我的問題。

我所做的只是下載sqljdbc4驅動程序并將驅動程序粘貼到TOMCAT lib文件夾中。 (注意：下載驅動程序后將其解壓縮到某處，然后你會在該解壓縮文件夾中找到原始驅動程序。將該文件粘貼到tomcat lib文件夾中。這就是我做錯了，我只是粘貼了下載的rar文件互聯網，這就是為什么tomcat無法找到驅動程序)。

粘貼lib文件夾中的驅動程序后，只需將類路徑設置為該驅動程序即可完成。