Making https: connection from java code loaded into Oracle 8i database
A bit of a blast from the past, really, as 8i provides a JVM at 1.2.2.
I need to provide an PL/SQL function which accesses a RESTful web service requiring https connection. Got the call working under 1.2 locally without much trouble using:
static {
System.setProperty("java.protocol.handler.pkgs",
"com.sun.net.ssl.internal.www.protocol");
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
}The trick is to get the Oracle database to run the code internally. What libraries do I need where? I get an extremely unhelpful NoClassDefFoundError, without mention of the offending class.
By doing loadjava with jcert.jar,. jnet.jar and jsse.jar (the libraries I'm using with the test program) I can get loadjava to accept and allegedly resolve the class.
endasil wrote:
malcolmmc wrote:
Well, sadly look at the colour scheme.Yeah, sarcastic was I. The NoClassDef error seriously doesn't give a class name? I find it astonishing that any implementation would be that stupid.Seriously. The strange thing is that before I got to the NoClassDefFound I had a Initialization error (until I added a security rule for setting the Provider) and for that I got a full stack trace (in an obscure trace file, granted).
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I am using Myql4.1.12.
I am conncting to mysql through Java.
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Problem when connecting locally to Oracle Database 10g from Java code
Good afternoon,
I try to connect to my local Oracle 10g from JAVA code. Could somebody tells me what are the 'values' to enter in place of 'value1, value2, value3' in the following:
final String connectionURLThin = "jdbc:oracle:thin:@value1:value2:value3";
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Thanks for any help.
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Details:
ERR MESSAGE----------------------
Exception in thread "main" java.lang.NoClassDefFoundError: oracle/dms/instrument/ExecutionContextForJDBC
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:365)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:854)
at java.sql.DriverManager.getConnection(DriverManager.java:620)
at java.sql.DriverManager.getConnection(DriverManager.java:200)
at javaapplication6.ConnectionExample.driverManager(ConnectionExample.java:138)
at javaapplication6.Main.main(Main.java:36)
Caused by: java.lang.ClassNotFoundException: oracle.dms.instrument.ExecutionContextForJDBC
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
... 8 more
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)
---------------------ERR MESSAGE
JAVA code------------------it compiles but throw an error when running there -> (*)...
final String driverClass = "oracle.jdbc.driver.OracleDriver";
final String connectionURLThin = "jdbc:oracle:thin:@jeffreyh3:1521:CUSTDB";
final String userID = "scott";
final String userPassword = "tiger";
final String queryString = "SELECT" +
" user " +
" , TO_CHAR(sysdate, 'DD-MON-YYYY HH24:MI:SS') " +
"FROM dual";
public void driverManager() {
Connection con = null;
Statement stmt = null;
ResultSet rset = null;
try {
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
con = DriverManager.getConnection(connectionURLThin, userID, userPassword); // (*) prob here
stmt = con.createStatement ();
rset = stmt.executeQuery(queryString);
rset.close();
stmt.close();
} catch (SQLException e) {e.printStackTrace();
--------------------JAVA JDK 1.6
My system ------------------------
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - ProductionYes, the network connection could not be established. Like the error said.
What you're asking about is the exact reason, but that could be any number of things and not at all related to code. You could have the wrong host, the wrong port. A firewall could be blocking the outgoing connection, a firewall could be blocking the incoming connection. Etc. etc. -
HTTPS connection from servlet to another webserver
Hi,
We want to make a https connection from a servlet in weblogic server to another
web server (not necessarily weblogic). We also need dual authentication. But whenever
we use URL.openConnection(), it always returns us weblogic's internal https and
SSL implementation. Since weblogic has no documentation about how to use these
internal classes, such as how to set trusted server certificate, and how to set
client certificate (servlet is a client of another web server). We want to use
jsse, after setting JSSE required system properties, I still get a weblogic's
httpsURLConnection. Can any of you tell me how to resolve this issue?
Thanks.
XinshiYeah, I'm using JSSE now. Here is what I did:
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provide());
Provider prov = new SimpleSecureProvider();
prov.setProperty("SecureRandom.efficient", "test.EfficientSecureRandom");
Security.insertProviderAt(prov, 1);
You don't really need the provider stuff to get the example working. I use it
to get around a quick in JSSE where the random number generator takes 15-30 seconds
to generate a random sequence at start up.
SimpleSecureProvider looks like this:
public class SimpleSecureProvider extends Provider
public SimpleSecureProvider()
super("SimpleSecureProvider-", 1.0, "Hack to enable more efficient random
seed generator");
test.EfficientSecureRandom is bascially an exact copy of Sun's SecureRandom.java
with the only difference that I used my own random number generator.
Anyway, rest of the code you need looks like this:
URL url= new URL("htps://someplace.com");
URLConnection sconnection = url.openConnection();
Do whatever.
I also stored jcert.jar, jnet.jar, jsse.jar in /usr/java/jdk1.3/lib/ext
I think that is everything.
I just noticed that service pack 9 has a security example that does not require
all these jsse hacks. I'm trying to get it to work, but not having much luck.
Anybody got this working right?
"Jayesh Patel" <[email protected]> wrote:
See if this works,
1. Add the 'j2ee.jar' to CALSSPATH in weblogic startup script.
2. Set the property SSLHandlerEnabled flase in config.xml
3. Add the following property permission to the
weblogic.policy' file under a 'grant' directive
for all codebases (bottom): 'permission java.security.AllPermission'
4. Use the following bit of source code to create an https connection:
import com.sun.net.ssl.*; ....
com.sun.net.ssl.HttpsURLConnection connection;
System.setProperty ("java.protocol.handler.pkgs",
"com.sun.net.ssl.internal.www.protocol");
java.security.Security.addProvider(new
com.sun.net.ssl.internal.ssl.Provider() );
URL url = new URL( "https", hostname, query );
-Jayesh
connection = (com.sun.net.ssl.HttpsURLConnection )url.openConnection(
"Xinshi Sha" <[email protected]> wrote in message
news:[email protected]...
Hi,
We want to make a https connection from a servlet in weblogic serverto
another
web server (not necessarily weblogic). We also need dual authentication.But whenever
we use URL.openConnection(), it always returns us weblogic's internalhttps and
SSL implementation. Since weblogic has no documentation about how
to
use
these
internal classes, such as how to set trusted server certificate, andhow
to set
client certificate (servlet is a client of another web server). Wewant to
use
jsse, after setting JSSE required system properties, I still get aweblogic's
httpsURLConnection. Can any of you tell me how to resolve this issue?
Thanks.
Xinshi -
HTTPS connection from portal to external webserver
Hi,
I am looking for a way to open a HTTPS connection from portal server to an external webserver. According to <a href="http://help.sap.com/saphelp_nw04/helpdata/en/e2/71c83edf72e16be10000000a114084/content.htm">SAP</a> the code should look like
KeyStore keystoreCAs = ...
SecureConnectionFactory factory = new SecureConnectionFactory(keystoreCAs, null);
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Any ideas?
Regards,
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For connecting via a proxy the host name and port number of the proxy have to be set as System properties using "https.proxyHost" and "https.proxyPort".
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Regards,
Martin -
How do i make http connection from an applet to a servlet
i am not able to make a http connection from the applet to servlet
my code for servlet is as follows
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class newDatabaseServlet extends HttpServlet {
// Connection con;
// Statement stmt;
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
resp.setContentType("text/content");
System.out.println("megha");
String mthd[] = req.getParameterValues("event");
System.out.println(mthd.length);
System.out.println(mthd);
System.out.println(req.getQueryString());
// System.out.println("megha");
PrintWriter fw = new PrintWriter(new FileOutputStream(new File("e:/JRun/servers/default/default-app/mycontent.txt")));
String s = "this text comes from servlet";
fw.print(s);
fw.flush();
if(mthd[0].equalsIgnoreCase("callEditor")) {
openEditor(req,resp);
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/* try {
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catch(Exception e) {
e.printStackTrace();
try {
resp.sendRedirect("/RunApp1.html");
catch(IOException e) {
e.printStackTrace();
/*try {
Class.forName("oracle.jdbc.driver.OracleDriver");
con = DriverManager.getConnection("jdbc:oracle:thin:@pc6:1521:oradba","test","test");
catch(Exception e) {
e.printStackTrace();
resp.setContentType("text/html");
PrintWriter output = resp.getWriter();
try {
stmt = con.createStatement();
String strContent = "select * from edTable where newsid = 2";
ResultSet rs = stmt.executeQuery(strContent);
if(rs.next()) {
String newsText = rs.getString(2);
/* StringBuffer buf = new StringBuffer();
buf.append("<B>servlet</B>");
try {
resp.sendRedirect("RunApp");
catch(IOException e) {
e.printStackTrace();
// output.println(buf.toString());
// output.close();
my code for applet is
import javax.swing.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import java.awt.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
public class EdApplet extends JApplet {
public void init() {
Container c;
c = getContentPane();
JPanel but = new JPanel();
c.add(but,BorderLayout.NORTH);
final JEditorPane je = new JEditorPane();
JScrollPane jsp = new JScrollPane(je);
HTMLEditorKit ht = new HTMLEditorKit();
je.setEditorKit(ht);
je.setEditable(true);
HTMLDocument mdoc = (HTMLDocument)ht.createDefaultDocument();
StyleSheet mcontext =mdoc.getStyleSheet();
je.setDocument(mdoc);
c.add(jsp,BorderLayout.CENTER);
JPanel bot = new JPanel();
c.add(bot,BorderLayout.SOUTH);
JButton save = new JButton("save");
but.add(save);
String str = getInitialText();
je.setText(str);
String servletUrl="http://pc7:8100/servlet/newDatabaseServlet";
try{
URL servletURL = new URL(servletUrl);
URLConnection servletConnection = servletURL.openConnection();
servletConnection.setRequestProperty("event","saveText");
servletConnection.setDoOutput(true);
servletConnection.setUseCaches(false);
catch(Exception e) {
// je.setText(e.printStackTrace());
ActionListener lst = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
String save = je.getText();
saveText(save,je);
save.addActionListener(lst);
//je.setText("<B>this</B>");
//URLConnection servletConnection = null;
/* try {
String servletUrl="http://pc7:8100/servlet/newDatabaseServlet";
URL myUrl = new URL(servletUrl);
servletConnection = myUrl.openConnection();
servletConnection.setDoOutput(true);
servletConnection.setUseCaches(false);
/* BufferedReader br = new BufferedReader(new InputStreamReader(servletConnection.getInputStream()));
String t = br.readLine();
je.setText(t);
catch(Exception e) {
e.printStackTrace();
/* ActionListener lst = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
BufferedReader br = new BufferedReader(new InputStreamReader(servletConnection.getInputStream()));
String t = br.readLine();
je.setText(t);
click.addActionListener(lst);
/*void String changeText(UrlConnection con) {
BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream));
String t = br.readLine();
return t;
public String getInitialText()
//String me = null;
URLConnection textConnection = null;
StringBuffer sb = new StringBuffer();
try {
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textConnection.setDoInput(true);
textConnection.setUseCaches(false);
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// me = (String)servletConnection.getContent();
String s = null;
while((s = br.readLine())!=null) {
sb.append(s);
catch(Exception e) {
e.printStackTrace();
return sb.toString();
public void saveText(String saveStr,JEditorPane je) {
//String saveStr = je.getText();
//String servletUrl="http://pc7:8100/servlet/newDatabaseServlet?event='saveText'&newsid='2'";
//String servletGet="http://pc7:8100/servlet/newDatabaseServlet";
String servletUrl="http://pc7:8100/servlet/newDatabaseServlet";
//String servletUrl = servletGet + "?"
// + URLEncoder.encode("event") + "="
// + URLEncoder.encode("saveText");
// je.setText(servletUrl);
try {
URL servletURL = new URL(servletUrl);
URLConnection servletConnection = servletURL.openConnection();
// servletConnection.setRequestProperty("event","saveText");
servletConnection.setRequestProperty(
"User-Agent","Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)");
//System.out.println("from applet");
servletConnection.setDoOutput(true);
servletConnection.setUseCaches(false);
//Propertiew prop = new Properties();
// prop.put("event","saveText");
PrintStream out = new PrintStream(servletConnection.getOutputStream());
out.println("event");
out.close();
catch(IOException e) {
je.setText(e.toString());
kindly tell me what is the error
what is the best method of doing this
thanking u in anticipation
megha soodomg O_o
We cannot debug your code, but:
Did you try the servlet directly from your browser? Does it work?
Best regards from Germany,
r.v. -
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student.appendChild(age); // appends the name to the studentThen flush ya buffers or whatever and write the file
Edited by: Dream-Scourge on Apr 23, 2008 11:10 AM -
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Hi
Thank you for reading my post.
how i can set dropDown item to 6th item from java code ?
i have the value field of database and i can use it to set selected item of DropDown.
so : can i use value field to set the selected item ?
Thank u.Hi,
Please go through the following thread which discusses about setting teh selected item for a dropdown:
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Did the "requirement" mention whether the table existed already or not in the target database? - If not, did it tell you to create it - drop/create it?
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id="c7" filterFeatures="caseInsensitive">
<af:outputText value="#{row.invoiceDate}" id="ot16"/>
</af:column>
<af:column headerText="#{alfaprojectBundle['ordstatushistory.column.soldto']}"
width="100"
sortProperty="soldTo"
sortable="true" filterable="true"
id="c14" filterFeatures="caseInsensitive">
<af:outputText value="#{row.soldTo}"
visible="#{row.visibilityIsOrdrFirstItem}"
id="ot23"/>
</af:column>
So how to clear all filter values from java code.I can't get the example "Programmatically Manipulating a Table's QBE Filter Fields"
Where is it ?
https://smuenchadf.samplecode.oracle.com/samples/ClearTableColumnFilterFields.zip
Thks
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