代码如下：
package com;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class TestCon {
public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
String url = "jdbc:odbc:school";
try {
Connection conn = DriverManager.getConnection(url);
Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_READ_ONLY); ResultSet rs = stmt.executeQuery("select * from administrator");
while(rs.next()){
System.out.println(rs.getObject(1));
System.out.println(rs.getObject(2));
System.out.println(rs.getObject(3));
}
} catch (SQLException e) {
e.printStackTrace();
}
}}各位大侠，帮我看一下啊
package com;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class TestCon {
public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
String url = "jdbc:odbc:school";
try {
Connection conn = DriverManager.getConnection(url);
Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_READ_ONLY); ResultSet rs = stmt.executeQuery("select * from administrator");
while(rs.next()){
System.out.println(rs.getObject(1));
System.out.println(rs.getObject(2));
System.out.println(rs.getObject(3));
}
} catch (SQLException e) {
e.printStackTrace();
}
}}各位大侠，帮我看一下啊
信息: Jk running ID=0 time=0/16 config=C:\Program Files\Apache Software Foundation\Tomcat 5.0\conf\jk2.properties
2010-5-19 16:16:34 org.apache.catalina.startup.Catalina start
信息: Server startup in 9282 ms
java.lang.NullPointerException
at com.sevenEleven.javaBean.CDBConnection.executeQuery(CDBConnection.java:104)
at com.sevenEleven.javaBean.CcheckUser.checkAdminLogin(CcheckUser.java:25)
at com.sevenEleven.servlet.CcheckUserServlet.doPost(CcheckUserServlet.java:95)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at com.sevenEleven.servlet.TraceFilter.doFilter(TraceFilter.java:38)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:233)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:245)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:199)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:195)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:205)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:647)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:511)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:575)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:649)
at java.lang.Thread.run(Thread.java:595)