Problem: connect DB with Applet by JDBC-ODBC bridge

Question

Dear all,
When I connect local MS SQL server by "sun.jdbc.odbc.JdbcOdbcDriver" as below, it works well! However, when I put the similar code under Java Applet program, it cannot run by showing error:
java.security.AccessControlException: access denied (java.lang.RuntimePermission accessClassInPackage.sun.jdbc.odbc)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:272)
at java.security.AccessController.checkPermission(AccessController.java:399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkPackageAccess(SecurityManager.java:1501)
at sun.applet.AppletSecurity.checkPackageAccess(AppletSecurity.java:169)
I think Java Applet has some security policy when I try to use applet to connect(read/write) DB. How can I solve it so that I can browse my applet under IE.
Thanks a lot!
Here is my worked code in Java program but not in Applet:
import java.sql.*;
public class TestJDBC1 {
public static void main(String args[]) throws Exception {
String userid = "";
String password = "";
// Register the driver with DriverManager
new sun.jdbc.odbc.JdbcOdbcDriver();
// Get a connection
Connection conn = DriverManager.getConnection("jdbc:odbc:rdr",
userid, password);
// Create a statement for executing SQL
Statement stmt = conn.createStatement();
// Execute a query / SELECT statement
ResultSet rset = stmt.executeQuery("SELECT * FROM PlatformNode");
ResultSetMetaData rsmd = rset.getMetaData();
// Find out how many columns were returned by the query
int count = rsmd.getColumnCount();
// Loop until all rows have been processed
while (rset.next()) {
// Loop until all columns in current row have been processed
for (int i = 1; i <= count; i++) {
// Print out the current value
System.out.print(rset.getObject(i));
// Put a comma between each value
if (i < count) {
System.out.println(",");
// Start the next row's values on a new line
System.out.println("");
// Close the database objects
rset.close();
stmt.close();
conn.close();

Answer 1

Hi,
Applets by default are restricted from accessing a lot of things.to enable applest from accessing database and other thngs u need to edit the policy file
Try this.
go to the jre/bin directory open the policytool.exe file
and add permission(in ur case RuntimePermission to access class in package sun.jdbc.odbc) and save the file.
this will enable applets from accessing the databse.
Hope that helps
Note:
policytool.exe must be used to open the java.policy file present in /jre/lib/security directory and then add the permissions
regards,
Partha