How to retrive data from oracle dtaabase to JSP

Question

HI Please help me in the fallowing issue,
I am writing 2 JSps with tomcat 5.5 while I am retiving data from database ,, I am unable to retive it.
can any one help what is the best solution,
Thanks IN Advance,,
here is my code..
<%@ page language="Java" import="java.sql.*"%>
<%
try
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Connection conn = DriverManager.getConnection ("jdbc:oracle:thin:@Spandhan:1521:orcl",
"waveset" ,"waveset");
Statement stmt = conn.createStatement ();
ResultSet rset = stmt.executeQuery ("select * from "+request.getParameter('tableName'));
while (rset.next ()){
     out.println(rset.getString (1));
//out.println("4");
BLOB b=rset.getBLOB ("XML");
//out.println("5");
out.println(b.getBytes(1,b.length()));
//out.println("6");
out.println("<BR/>");
out.println("<BR/>");
}catch(Exception e){
out.println(e);
%>
My error is this ,,
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 3 in the jsp file: /test.jsp
Generated servlet error:
Invalid character constant
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 3 in the jsp file: /test.jsp
Generated servlet error:
Invalid character constant
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:414)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:297)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.
Apache Tomcat/5.5.20

Answer 1

Thanks all. i did modification to the code, now i am getting onother error that
javax.servlet.ServletException: Invalid column type: getBLOB not implemented for class oracle.jdbc.driver.T4CVarcharAccessor
i want to retrive BLOB value from database ,,
here is my modification code ,,
and i am using jar OJDBC14.jar . the path is correct,I dont know whether this driver will support to retrive Blob value or not ?
<%@ page language="Java" import="java.sql.*" %>
<%
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Connection conn = DriverManager.getConnection ("jdbc:oracle:thin:@hostname:1521:orcl","waveset","waveset");
Statement stmt = conn.createStatement();
ResultSet rset = stmt.executeQuery ("select * from USEROBJ");
while (rset.next()){
long l=1L;
Blob b=rset.getBlob(1);
int len=(int)b.length();
String s=new String(b.getBytes(l,len));
out.println(s);
out.flush();
%>
My error is like that ...
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Invalid column type: getBLOB not implemented for class oracle.jdbc.driver.T4CVarcharAccessor
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
javax.servlet.ServletException: Invalid column type: getBLOB not implemented for class oracle.jdbc.driver.T4CVarcharAccessor
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:843)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:776)
     org.apache.jsp.test4_jsp._jspService(test4_jsp.java:74)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.sql.SQLException: Invalid column type: getBLOB not implemented for class oracle.jdbc.driver.T4CVarcharAccessor
     oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
     oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
     oracle.jdbc.driver.Accessor.unimpl(Accessor.java:358)
     oracle.jdbc.driver.Accessor.getBLOB(Accessor.java:1300)
     oracle.jdbc.driver.OracleResultSetImpl.getBLOB(OracleResultSetImpl.java:1275)
     oracle.jdbc.driver.OracleResultSetImpl.getBlob(OracleResultSetImpl.java:1461)
     org.apache.jsp.test4_jsp._jspService(test4_jsp.java:55)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.
Apache Tomcat/5.5.20
Please help me, Thanks,
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