Need an information using java.sql in jsp

I found that there is a 'dataset' like architecture in .NET, is there any 'dataset' like substance in our java, if it is means can you give me some ideas for using it in jsp, give me some example for saving a record in the mysql database. very urgent please,

KIRUPA_SHANKAR wrote:
I found that there is a 'dataset' like architecture in .NET, is there any 'dataset' like substance in our java, if it is means can you give me some ideas for using it in jsp, give me some example for saving a record in the mysql database. Shouldn't be doing database stuff in JSPs. Use JSTL and its <sql> tags if you must.
RowSet might be close. I don't write .NET.
very urgent please,Not to me.
%

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Using java bean with jsp

hello friends,
i'm new to jsp. i want to create an html form that accepts username and a value from four radio buttons and display back the entered name and checked radio button's value using java bean.
i use the <jsp:setProperty id="" property="*"> method. i don't know how to access the radio buttons value from the html.
also when i use an additional field other than username the jsp page is showing error.
Please give me the correct method to use java bean with jsp in this circumstance.
thank you.

thank you, but i have a problem left. the case is like this.
i got the jsp and bean worked fine when i have a sinle input text field.
but when i added a second text field i recieved the following error.
javax.servlet.ServletException: basket.newbean.getUserPass()Ljava/lang/String;
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
     org.apache.jsp.newform.process_jsp._jspService(process_jsp.java:69)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
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     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
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pls hlp.

What's the difference between using java directly in JSP and java bean

What is the difference if I use java code directly in JSP or use java bean in JSP?
Which class to use for receiving the passed parameter from html or java script? Any difference for java code and java bean in the way receiving the passed data?
How can I pass string from jsp to html or java script?

1 Cleaner pages
2 you have to write the class and use set and get methods
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Create table dinamically using java sql types?

Hi! I've an application that reads an XML file. This file contains de definitions of some tables, using java sql types. For example:
<dbtable>
<dbtablename>Name of table</dbtablename>
<dbtablefield>
    <name>Name of table field</name>
    <type>java.sql.Types.VARCHAR</type>
    <length>10</lenght>
    <canNull>0</canNull>
    <isPK>1</isPK>
</dbtablefield>
</dbtable>That's a little example of one table, with one field. Is a java.sql.Types.VARCHAR (or is equivalent in int), which has a size of 10, it cannot be null and is a primary key for the table.
Now, the lenght, null, and primary keys are not problem at all. What I want to know, is how do I create de table using the java.sql.Types. I mean, I don't want to hard code:
String s = "CREATE TABLE name (COLUMN VARCHAR(10)...";Instead, I want to use some "wild cards", as are used in PreparedStatement. The idea of this is that no matter what DB I'm using, I must always be capable of creating the tables not worrying for the DB. I mean, I must be able to create the table in Oracle, SQL Server, DB2, etc., using the same XML and the same java class.
Something like:
String s = "CREATE TABLE name (COLUMN ? (10)...";
someobject.setObject(1,java.sql.Types.VARCHAR);
someobject.execute(); //create tableIs this possible? Or do I have to make a map for each DB?
Thanks a lot for your help! Dukes available!

you can provide some fields at runtime..
for example
"CREATE TABLE name (COLUMN" + arg[1] +"(10)..."
here arg is the string array passed into the main.

How to get Listener Information using PL/SQL code

How to get Listener Information using PL/SQL code

user2075318 wrote:
How to get Listener Information using PL/SQL codeThis approach (somewhat of a hack) can be used - but it does not really provide meaningful data at application layer.
SQL> create or replace function TnsPing( ipAddress varchar2, port number default 1521 ) return varchar2 is
2          type THexArray is table of varchar2(2);
3          --// tnsping packet (should be 10g and 11g listener compatible)
4          TNS_PING_PACKET constant THexArray := new THexArray(
5                  '00', '57', '00', '00', '01', '00', '00', '00',
6                  '01', '39', '01', '2C', '00', '00', '08', '00',
7                  '7F', 'FF', '7F', '08', '00', '00', '01', '00',
8                  '00', '1D', '00', '3A', '00', '00', '00', '00',
9                  '00', '00', '00', '00', '00', '00', '00', '00',
10                  '00', '00', '00', '00', '00', '00', '00', '00',
11                  '00', '00', '00', '00', '00', '00', '00', '00',
12                  '00', '00', '28', '43', '4F', '4E', '4E', '45',
13                  '43', '54', '5F', '44', '41', '54', '41', '3D',
14                  '28', '43', '4F', '4D', '4D', '41', '4E', '44',
15                  '3D', '70', '69', '6E', '67', '29', '29'
16          );
17
18          socket UTL_TCP.connection;
19          txBytes number;
20          rxBytes number;
21          rawBuf raw(1024);
22          resp    varchar2(1024);
23 begin
24          socket := UTL_TCP.open_connection(
25                          remote_host => ipAddress,
26                          remote_port => port,
27                          tx_timeout => 10
28                  );
29
30          --// convert hex array into a raw buffer
31          for i in 1..TNS_PING_PACKET.Count loop
32                  rawBuf := rawBuf || HexToRaw( TNS_PING_PACKET(i) );
33          end loop;
34
35          --// send packet
36          txBytes := UTL_TCP.write_raw( socket, rawBuf, TNS_PING_PACKET.Count );
37
38          --// read response
39          rxBytes := UTL_TCP.read_raw( socket, rawBuf, 1024 );
40
41          UTL_TCP.close_connection( socket );
42
43          --// convert response to varchar2
44          resp := UTL_RAW.Cast_To_Varchar2( rawBuf );
45
46          --// strip the header from the response and return the text only
47          return( substr(resp,13) );
48 end;
49 /
Function created.
SQL>
SQL> select tnsping( '10.251.93.30' ) as TNSPING from dual;
TNSPING
(DESCRIPTION=(TMP=)(VSNNUM=169869568)(ERR=0)(ALIAS=LISTENER))
SQL> select tnsping( '10.251.95.69' ) as TNSPING from dual;
TNSPING
(DESCRIPTION=(TMP=)(VSNNUM=0)(ERR=0)(ALIAS=LISTENER))
SQL>

Using Java Bean in JSP to show database record

I have links in my Tomcat container that if someone clicks on a specific link it should go to a Record page (Show.jsp) with all the values associated with a record from a database.
For example if someone clicks on a specific link like this:
LinkExample
it would take you to a jsp with database info for someone named Jones and show you his info:
Lastname = Jones
Firstname = Mike
City = San Diego
I would like to do this using a Java helper class and bean so I dont have any database connection or Java code in my JSP.
I created Java class file that has Database connection that works with a Java bean. I just dont know how to get the Show.jsp to work with the Java Bean and Java helper class file.
Here is what I have for Show.jsp and this is the part I have been working on the longest but cant get it to work because it doesnt seem to work with the database:<jsp:useBean id="user" class="num.UserDB"/>
//do I call getUser(lastname) here and if so how?
<jsp:setProperty name="user" property="*"/>
Last Name: <jsp:getProperty name="user" property="lastname"/><BR>
First Name: <jsp:getProperty name="user" property="firstname"/><BR>
City: <jsp:getProperty name="user" property="city"/><BR>My Java Helper class that compiles and connects to database:
package num;
import java.io.*;
import java.sql.*;
import java.util.*;
import num.User;
public class UserDB
public User getUser(String lastname)
User user = new User();
        try
     Class.forName...//database connection stuff here
    ResultSet results = stmt.executeQuery("SELECT * from user where lastname = '" + lastname + "'");
     if(results.next() == true)
     results.next();
     user.setLastname(results.getString("lastname"));
     user.setFirstname(results.getString("firstname"));
        user.setFirstname(results.getString("city"));
     catch(Exception e)
               System.out.println("Exception...");
   return user;
}My Java Bean that compiles here:
package num;
public class User
private String firstname;
private String lastname;
private String city;
public User()
     //no arg constructor
public User(String firstname, String lastname, String city)
       this.lastname = lastname;
          this.firstname = firstname;
          this.city = city;
public String getLastname()
          return lastname;
public void setLastname(String lastname)
     this.lastname = lastname;
//more bean methods for all fields here

Sorry if I wasnt specific enough. I have a link that passes a value (field that is passed is called lastname) to a JSP where I want to show record info for that value that is passed.
My question is how do I show the database record info on Show.jsp for the lastname field value of Jones where I want to use a Java Bean and Database helper class in Show.jsp
Here is the message I get when I hit the link (LinkExample) and it goes to Show.jsp:
org.apache.jasper.JasperException: Cannot find any information on property 'lastname' in a bean of type 'num.UserDB'
.....My UserDB class:
public class UserDB
public User getUser(String lastname)
User user = new User();
        try
     Class.forName("org.gjt.mm.mysql.Driver");
    Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/dbconnone?user=smitherson&password=abcdefg");
    Statement stmt = conn.createStatement();
    ResultSet results = stmt.executeQuery("SELECT * from user where lastname = '" + lastname + "'");
     if(results.next() == true)
     results.next();
     user.setLastname(results.getString("lastname"));
     user.setFirstname(results.getString("firstname"));
                     user.city(results.getString("city"));
     catch(Exception e)
         System.out.println("Exception..." + e);
   return user;
}Bean class:
package num;
public class User
private String firstname;
private String lastname;
private String city;
public User()
     //no arg constructor
public User(String firstname, String lastname, Sting city)
      this.firstname = firstname;
       this.lastname = lastname;
this.city = city;
public String getFirstname()
          return firstname;
public void setFirstname(String firstname)
     this.firstname = firstname;
public String getLastname()
          return lastname;
public void setLastname(String lastname)
     this.lastname = lastname;
public String getCity()
          return city;
public void setCity(String city)
     this.city = city;

Using java beans in jsp using tomcat

hi i have made a form to enter user first name and last anme with html and then i have made a value javabean in which i want to store the information filled bu user. i want to display the information stored in java bean in jsp page i have made the full application and i have made class file of java bean as well as jsp file but when i try to run this web application in tomcat i am getting class not found exception.
could anybody tell me that where i should store the bean class in tomcat and do i need to make any package in which i have to place my java bean file plz tell me complete procedure along with code if possible

whew thats a lot of questions... All of this is pretty basic stuff. I would recommend you take a look at the web services tutorial: http://java.sun.com/j2ee/1.4/docs/tutorial/doc/
lets see.
Starting a package name with com is just a generic standard which is followed.
It is most correct when creating commercial packages to create packages like com.companyName.project
http://java.sun.com/docs/codeconv/html/CodeConventions.doc8.html
You should not need a page import directive unless you are using classes in scriptlets: ie <% %> tags in your JSP. Your jsp:useBean tag will automatically import necessary classes - you don't need to import classes for beans specifically
<jsp:useBean id="myClass" scope="session" class="com.myPackage" />
Your directory structure should be something like this
webApplicationRootDirectory
- page1.html
- page2.html
- page3.jsp
- page4.jsp
- WEB-INF
     - web.xml
     - classes
       - com
         - myPackage
           - myClass.classerrrm. Thats about it I think.

Handling Billing Information using Java - Insecure??

Our firm is currently developing an e-commerce building site using java. An issue has propped up while trying to design how thw site should handle payments . The developers are adamant that due to the ease with which class files can be decompiled , we shouldnt let the user enter his payment info( like credit card no: ) on our site , rather forward to a secure gateway site. But the client is of the view that doing this will break the flow of the process and points out that many sites do make usre enter info on their site . I'm sure you must know more on this than i do , is it safe to let the user enter the info on our site and let we pass them to the provider ?

confused__ wrote:
Our firm is currently developing an e-commerce building site using java. An issue has propped up while trying to design how thw site should handle payments . The developers are adamant that due to the ease with which class files can be decompiled , we shouldnt let the user enter his payment info( like credit card no: ) on our site , Fire those developers and hire somebody competent.
Ther are plenty of secure sites that are backed by Java. You need to make sure that the information that needs to be secured is encrypted before transmission. You'd do this by using HTTPS rather than HTTP. This has nothing to do with what language you're using on the back end. If you're using an applet on the client side, it should still be possible to use HTTPS.
Typically in a web app like this, the Java is all on the server side, and the end user can never see it. Even if it is an applet, so the Java does come to the client browser, the CC info will not be inside the source code, and seeing the source will not give a bad guy the ability to intercept CC numbers, unless your developers are idiots and use a homegrown, non-keyed encryption algorithm whose security relies on not knowing the algorithm, or embed a database connection URL and password in the applet code.
Seriously--I would be very worried about your developers' qualifications.
Edited by: jverd on Jun 21, 2008 12:02 PM

Getting the current time using java.sql.Time

I need to set the current time in a database field. I tried the following code (using my logic) to set the current time. But, I end up getting "Jan 1, 1970" in the time field in the database.
Here is the code :
Calendar cal = Calendar.getInstance();
Java.sql.Time now = java.sql.Time.valueOf(
          cal.get(Calendar.HOUR_OF_DAY) + ":" +
          cal.get(Calendar.MINUTE) + ":" +
          cal.get(Calendar.SECOND));
What should I do to get the current time in the "now" variable? Right now, it ends up in the database as "Jan 1, 1970".
Thanx in advance.

Can you show me the code to do SimpleDateFormat?
Assuming that I use the following skeleton to get the
time value from the database, can you show me the
code for the missing link (so as to display in the
format "hh:mm:ss") ?
java.sql.Time timeFromDb =
obj.getActionTime();
// The above code gets the "time" field from
the database into "timeFromDb"
// Use SimpleDateFormat to display the time
java.text.SimpleDateFormat sdf = new
java.text.SimpleDateFormat("hh:mm:ss");
// Now what do I do with "sdf" and
"timeFromDb" ?
// Print out the time value
System.out.printf("Time is : %s\n",
.... );Hi,
I don't know if you want 24h clock or not. This is the pattern for 24h clock.
"HH:mm:ss"
You get the text string by calling sdf.format(timeFromDb)
Kaj

Using java.sql.Time: Offset by 1 hour?

I have a problem understanding the behaviour of the java.sql.Time class. As the following example shows.
61952000 ms is the Time 17:12:32. If i feed a Time-Object with it and print the time or date I'll get "18:12:32",
an offset of 1h. But if I use time.getTime(), I get my ms value which equals 17:12:32.
As my timezone shows, I have a GMT offset of one hour. But why does the getTime() method not calculate
the timezone offset to the ms?
Time time = new Time(61952000);
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        System.out.println( new Date(time.getTime()) ); // Thu Jan 01 18:12:32 CET 1970
        System.out.println(time.getTime()); // 61952000
        System.out.println(time); // 18:12:32
        System.out.println(Calendar.getInstance().getTimeZone());
         * sun.util.calendar.ZoneInfo[id="Europe/Berlin",offset=3600000,dstSavings=3600000,
         * useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,
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Thanks for your reply. But please take a look at the following code snippet. It intends to add a Timestamp representing the
start of a day (time component 00:00:00) to a time component (having Date to 01-01-1970):
        Time time = new Time(61952000);
        Calendar c = Calendar.getInstance();
        System.out.println("time: " + time); // 18:12:32
        c.set(Calendar.HOUR_OF_DAY, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.MILLISECOND, 0);
        System.out.println("date: " + c.getTime()); // Fri Apr 03 00:00:00 CEST 2009
        Timestamp timestamp = new Timestamp( c.getTimeInMillis() + time.getTime() );
        Date d = new Date(timestamp.getTime() );
        System.out.println("\nresult: " + d); // result: Fri Apr 03 17:12:32 CEST 2009If I assume that getting and setting the milis always deals with timezone independent values, but operating methods
like toString(), getHour() etc use the timezone, then I can not explain the result (last line): 17:12:32 is the timezone
independend value. Should'nt d.toString() show the timezone dependend value of 18:12:32?

How to use java.sql.Date ?

hi there:
I used
ps.setDate(27, new java.sql.Date(new java.util.Date().getTime()));
ps.executeUpdate();
in my code to insert the current date to the 27th column of one table, this column's type is DATE, the database is ORACLE. However, I got the error like this one: ORA-01843: not a valid month.
I think I incorrectly used the java.sql.Date API to cause this error. So anyone can tell me how to use it correctly?
Thanks for the answers,
Sway

Other columns are all VARCHAR2 type;
The oracle error message indicated that this is a
date-related one. 27th are the only column using DATE
So I came to draw my conclusion that the SQL might be
wrong.Except that if, for example, the date column is actually at index 26 then Oracle might try to convert the string being passed in (at 26) as a date. But it isn't a date. So then oracle is going to throw an exception indicating that something is wrong - like that the month is invalid.

Problem in Using Java Bean in JSP

Hi,
I have a bean called BankAccount.....I tried to use it in a jsp file called Usebean.jsp like this <jsp:useBean id="BA" class="BankAccount" scope="application" /> I tried in both tomcat and j2ee1.3 server... but when i run the jsp file i get an error saying..... Class.org.apache.jsp.BankAccount not found...... But i have put the class file properly inse classes folder.....
Can anyone help me soon..... i am new to JSP........
Thanks,
Akshatha

Well u need to have your class in a package
like mypackage.BankAccount
and put your class in classes/mypackage
<jsp:useBean id="BA" class="mypackage.BankAccount" scope="application" />

In Struts is it possible to use java code in jsp?

in Struts Tag Program in jsp pages is it efficient to use java code? Please explain?

No issues.. you can use java code... in jsp struts
based framework..
SJYou can use Java code as scriptlets in any JSP, but that doesn't mean there are no issues.
I would say it's a bad idea for the following reasons:
(1) Scriptlet code is difficult to read when mingled with HTML
(2) You can't unit test scriptlet code
(3) It increases the chance that business logic will leak into pages where it doesn't belong.
Better to use a well-proven tag library like JSTL or the Struts taglibs and keep all scriptlets out of your JSPs.
%

Anybody using Hypersonic SQL in JSP?

Hello,
Does anybody use Hypersonic SQL?
I implement a guestbook system with JSP that
saves data in Hypersonic SQL. This system
runs on www.mycgiserver.com. My JSP program
has thread safe option set to false to make
sure one thread is reading and writing the database
at a time. However, every once in a while, the
database will be wiped out mysteriously.
So I am just wondering that this happens to
anyone else? Is this a Hypersonic SQL's bug
or it's the server that goofs up or I did something
wrong with the JSP setting? Any ideas or
comments please? Thanks !!!

Hi there!
I use Hypersonic locally and on mycgiserver.com. Luckilly, I haven't encountered your problems so far. I use a similar approach, I have a bean that handles a singleton-connection to the DB, and that will queue up all requests. But so far , I haven't had that much load on the app, so maybe I'll get back in this matter, with the same problem... Anyone att mycgiserver that had an id�a?
regards
Markus

Overhead of using java.sql.STRUCT

I am calling a stored proc passing in a java.sql.STRUCT
created via DDL statement
CREATE TYPE APPDBA.MY_STRUCT
AS OBJECT
USER_KEY INTEGER,
USER_HOME VARCHAR2(32)
My question is:
when i am creating a structdescriptor from java
oracle.sql.StructDescriptor sDesc =
oracle.sql.StructDescriptor.createDescriptor ("APPDBA.MY_STRUCT", mConnection)
what exactly goes on under the hood here? Does the driver
make a round trip call to the DB every time?
Does it do some sort of caching?
Thanks.

Thanks for your reply. But please take a look at the following code snippet. It intends to add a Timestamp representing the
start of a day (time component 00:00:00) to a time component (having Date to 01-01-1970):
        Time time = new Time(61952000);
        Calendar c = Calendar.getInstance();
        System.out.println("time: " + time); // 18:12:32
        c.set(Calendar.HOUR_OF_DAY, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.MILLISECOND, 0);
        System.out.println("date: " + c.getTime()); // Fri Apr 03 00:00:00 CEST 2009
        Timestamp timestamp = new Timestamp( c.getTimeInMillis() + time.getTime() );
        Date d = new Date(timestamp.getTime() );
        System.out.println("\nresult: " + d); // result: Fri Apr 03 17:12:32 CEST 2009If I assume that getting and setting the milis always deals with timezone independent values, but operating methods
like toString(), getHour() etc use the timezone, then I can not explain the result (last line): 17:12:32 is the timezone
independend value. Should'nt d.toString() show the timezone dependend value of 18:12:32?

Need an information using java.sql in jsp

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