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Java in General
JAVA DATABSE
suraj sheikh
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posted 15 years ago
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hello everyone, this is the only place i can get help ! Here are the details I have an html page, then i get the parameters to the servlets. Then i have a standalone class responsible for data base connection. Here is the directory structure c:\my projects\boaintegratedworkflow\src\com\system33\model\MyOracleConnection.java The source code is : package com.system33.model; import java.sql.*; public class MyOracleConnection { public String result="uninitialized" ; public Connection conn=null; public Connection connectionDriver() { try { Class.forName("oracle.jdbc.driver.OracleDriver"); conn = DriverManager.getConnection("jdbc oracle:thin:@localhost:1521:XE", "system","administrator"); } catch (Exception e) { e.printStackTrace(); result="error in connection"; } return conn; } public String fetchData() { try { Statement stmt = this.connectionDriver().createStatement(); String query="select * from boaiw"; ResultSet rs = stmt.executeQuery(query); while(rs.next()) { System.out.println(rs.getString(1)); result=rs.getString(1); } } catch (Exception e) { e.printStackTrace(); //result="error in data return" ; } return result; } public static void main(String[] args) { com.system33.model.MyOracleConnection obj=new com.system33.model.MyOracleConnection(); System.out.println(obj.fetchData()); } } This is the servlet Code c:\my projects\boaintegratedworkflow\src\com\system33\model\Submit.java package com.system33.web; import com.system33.model.*; import java.sql.*; import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.util.*; public class Submit extends HttpServlet { public Connection conn; public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { response.setContentType("text/html"); PrintWriter out=response.getWriter(); out.println("Selection Advice<br>"); out.println("<br> Value of connection "); com.system33.model.MyOracleConnection obj = new com.system33.model.MyOracleConnection(); out.println("<br> Data Fetched "+obj.fetchData()); out.println("<br> Data Fetched "+obj.connectionDriver()); out.println("<br> This is the new servlet<br>"); } } The class file lands in c:\my projects\boaintegratedworkflow\classes\com\system33\model\MyOracleConnection.class c:\my projects\boaintegratedworkflow\classes\com\system33\web\Submit.class And this is not fetching the data, it throws an exception whic i am not able to see as its not being displayed on the page Please Help me guys ! i need it
Bear Bibeault
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posted 15 years ago
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