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<%@page import="java.sql.*, javax.sql.*, javax.naming.*"%> | |
<% | |
DataSource ds = null; | |
Connection conn = null; | |
ResultSet result = null; | |
Statement stmt = null; | |
ResultSetMetaData rsmd = null; | |
try{ | |
Context context = new InitialContext(); | |
Context envCtx = (Context) context.lookup("java:jboss/datasources"); | |
ds = (DataSource)envCtx.lookup("PostgreSQLDS"); | |
if (ds != null) { | |
conn = ds.getConnection(); | |
stmt = conn.createStatement(); | |
result = stmt.executeQuery("SELECT now()"); | |
} | |
} | |
catch (SQLException e) { | |
System.out.println("Error occurred " + e); | |
} | |
int columns=0; | |
try { | |
rsmd = result.getMetaData(); | |
columns = rsmd.getColumnCount(); | |
} | |
catch (SQLException e) { | |
System.out.println("Error occurred " + e); | |
} | |
%> | |
<html> | |
<head> | |
<title>Using a DataSource</title> | |
</head> | |
<body> | |
<h1>Using a DataSource</h1> | |
<table width="90%" border="1"> | |
<tr> | |
<% // write out the header cells containing the column labels | |
try { | |
for (int i=1; i<=columns; i++) { | |
out.write("<th>" + rsmd.getColumnLabel(i) + "</th>"); | |
} | |
%> | |
</tr> | |
<% // now write out one row for each entry in the database table | |
while (result.next()) { | |
out.write("<tr>"); | |
for (int i=1; i<=columns; i++) { | |
out.write("<td>" + result.getString(i) + "</td>"); | |
} | |
out.write("</tr>"); | |
} | |
// close the connection, resultset, and the statement | |
result.close(); | |
stmt.close(); | |
conn.close(); | |
} // end of the try block | |
catch (SQLException e) { | |
System.out.println("Error " + e); | |
} | |
// ensure everything is closed | |
finally { | |
try { | |
if (stmt != null) | |
stmt.close(); | |
} catch (SQLException e) {} | |
try { | |
if (conn != null) | |
conn.close(); | |
} catch (SQLException e) {} | |
} | |
%> | |
</table> | |
</body> | |
</html> |
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