我的项目没有使用任何IDE。
整个编码使用Textpad完成。
所以我需要帮助连接sql server数据库和我的项目。
这是bean类,其中编写了用于数据库连接的业务逻辑。
我已经安装了SQL服务器并使用Windows身份验证创建了一个名为“vt”的数据库。
我甚至为数据库创建了dsn,即vtdsn。但仍然没有找到课程的例外。
请帮忙。
M卡在这里。
之前它在我使用MS Access进行数据库时工作正常。
但是在使用SQL服务器进行数据库连接时我需要做些什么改变
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;
}
}
将驱动程序添加到我的java bean类文件所在的Tomcat的classes文件夹中
并将驱动程序添加到jre / lib和jre / lib / ext文件夹中。
现在收到此错误
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.ponents.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$AbstractConnectionHandler.process(
AbstractProtocol.java:589)
at org.apache..AprEndpoint$SocketProcessor.run(AprEndpoin
t.java:1852)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:603)
at java.lang.Thread.run(Thread.java:722)
java.lang.NullPointerException
at ankit.RegisterBean.checkRegistration(RegisterBean.java:127)
at org.ponents.jsp.RegisterDataBase_jsp._jspService(Regist
erDataBase_jsp.java:117)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
90)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:123)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:
953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp
11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(
AbstractProtocol.java:589)
at org.apache..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
解决:
解决我的问题。
我所做的只是下载sqljdbc4驱动程序并将驱动程序粘贴到TOMCAT lib文件夹中。 (注意:下载驱动程序后将其解压缩到某处,然后你会在该解压缩文件夹中找到原始驱动程序。将该文件粘贴到tomcat lib文件夹中。这就是我做错了,我只是粘贴了下载的rar文件互联网,这就是为什么tomcat无法找到驱动程序)。
粘贴lib文件夹中的驱动程序后,只需将类路径设置为该驱动程序即可完成。