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Java Forum / Databases / December 2003

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Newbie JDBC + JSP

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Alex Schatten - 28 Nov 2003 17:16 GMT
Hello,
i try to test my first jsp Script:

<html><body>
<%@ page import = "java.sql.*" isThreadSafe="false" %>
<%
String sDbDrv = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
String sDbUrl =
"jdbc:microsoft:sqlserver://192.168.0.27:1433;databaseName=test";
String sUsr = "sa";
String sPwd = "pa55word";
String sSql = "select * from members";
Class.forName( sDbDrv );
Connection cn = DriverManager.getConnection( sDbUrl, sUsr, sPwd );
java.sql.Statement st = cn.createStatement();
ResultSet rs = st.executeQuery( sSql );
ResultSetMetaData rsmd = rs.getMetaData();
int n = rsmd.getColumnCount();

out.println("Zeige Classpath:" + System.getProperty("java.class.path") +
"<br>");
out.println( "<table border=1 cellspacing=0><tr>" );
for( int i=1; i<=n; i++ ) // Achtung: erste Spalte mit 1 statt 0
   out.println( "<th>" + rsmd.getColumnName( i ) + "</th>" );
while( rs.next() )
   {
   out.println( "</tr><tr>" );
   for( int i=1; i<=n; i++ ) // Achtung: erste Spalte mit 1 statt 0
   out.println( "<td>" + rs.getString( i ) + "</td>" );
   }
out.println( "</tr></table>" );
rs.close();
st.close();
cn.close();
%>
</body></html>

unforgently it did not work
see attached error below
I have Tomcat 4.1.29 and MS JDBC Driver SP2
The Return of ClassPath=:
D:\java\j2sdk1.4.2_02\lib\tools.jar;C:\jakarta-tomcat-4.1.29\bin\bootstrap.j
ar;C:\Driver\JDBC-MS\msbase.jar;C:\Driver\JDBC-MS\msslqserver.jar;C:\Driver\
JDBC-MS\msutil.jar
where are my *.jar are installed
any Help after 2 days trying and googling is welcome

regards Alex

org.apache.jasper.JasperException
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2
54)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConne
ction(Http11Protocol.java:549)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:666)
at java.lang.Thread.run(Thread.java:534)

root cause

java.lang.NullPointerException
at com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at org.apache.jsp.firstsql2_jsp._jspService(firstsql2_jsp.java:55)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2
07)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConne
ction(Http11Protocol.java:549)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:666)
at java.lang.Thread.run(Thread.java:534)
Reply to this Message
steve souza - 02 Dec 2003 04:18 GMT
For a simpler, more flexible way of displaying dynamic text including
xml and html check out the open source FormattedDataSet API.  Out of
the box it can render html tables, list boxes, drop down list boxes,
multi select lisboxes and more.   The developer also has total control
of display and so can create ANY dynamic text , and usually quite
easily.

Sample code:

FormattedDataSet fds=FormattedDataSet.createInstance();
String html=fds.getFormattedDataSet("select * from members",
"htmlTable");
String xml=fds.getFormattedDataSet("select * from members", "xml");

steve - http://www.fdsapi.com - the easiest way to generate dynamic
text
Reply to this Message


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