How to ping mysql database in JSP

Hi guys,
I am working on a JSP based application that sends data over to a remote mysql databse over port 5656 . I am intrested in writing a code sequence in JSP that will first check whether the remote mysql databse is working or not. If not, Then the user will be alerted.
Any help in this matter will be deeply appreciated. I have searched a lot and could not get any pointers on this topic
I am using tomcat 5.5 , latest j connector and mysql 5.0(latest)

What you can do is execute a dummy statement, such as:
select count(my_column) from my_table
public boolean isDatabaseOK()
try
    Connection c = MyDoConnection( blah );
    Statement s = c.createStatement();
    // make sure the table you chose below will ALWAYS have data in it!
    ResultSet r = s.executeQuery("select count(mycolum) from mytable");
    if ( r.next() ) return true; // this makes sure the statement successfully completed
    else return false;
} catch ( Exception e ) { return false; }
}HTH

Similar Messages

How to connect MySql database with JSP

Dear everyone,
how to connect MySql database with JSP......

It's too bad that nobody has ever asked this question before...

How to connect .... MYSQL database via JSP

Hello,
I am not able to connect mysql database via JSP... everytime i try to connect the database i get the following error .....
"java.lang.NoClassDefFoundError: org/aspectj/lang/Signature" ..
my jsp code is ....
<%@ page import = "java.sql.*" %>
<%
Connection conn = null;
Statement smt = null;
ResultSet rs = null;
%>
<%
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase","username" ,"password");
smt = conn.createStatement();
rs = smt.executeQuery("select * from table");
out.println("output is "+ rs.getString("my field"));
rs.close();
%>
I have installed ............
jdk1.5.0_02
MySQL Server 4.1
there are two jar files .. i tried with both jar files ..
mysql-connector-java-3.1.8-bin.jar
mysql-connector-java-3.1.8-bin-g.jar
tomcat server 5.5.9
my path .... is
C:\Program Files\Java\jdk1.5.0_02\bin;C:\jakarta-tomcat-5.5.9\bin;C:\program files\mysql\mysql server 4.1\bin;
any help on this error ..at the earliest ..
... am worried ..bcoz my deadlines is getting closer .....
.. step by step .. procedure .. could be helpful ..
anil

Find out the JAR which contains the class and add it
to WEB-INF/classes directory for your web application.WEB-INF/classes directory ..means ..C:\jakarta-tomcat-5.5.9\common\classes .. is that the one i need to keep my jar files ....???????????
well i have downloaded .. mysql database connector from the website "http://www.mysql.com/products/connector/j/ " .. and i have downloaded MySQL Connector/J 3.1..under which i have downloaded "Source and Binaries (zip)" ..
anil

Accessing MySql database in jsp

hi everyone!!!
i m new to java with little knowledge of jsp.
i want to access mysql database in jsp to develop a web page.
i have jdk and mysql installed and these are working. what are other requirements and how to do this.
plz help.
OS: MS Windows XP/ Fedora 10

Learn JDBC API: [http://java.sun.com/docs/books/tutorial/jdbc/index.html]. Create a DAO class which uses JDBC to interact with Java and takes or returns the desired data in form of DTO's. Use and test it as a plain vanilla Java application with a main() method. This require a JDBC driver (a concrete implementation of the JDBC API) in the classpath. MySQL offers JDBC drivers as download at their homepage, it is called "Connector/J".
Once you got the JDBC part to work, create a Servlet class which holds an instance of the DAO class and uses its methods to interact with the database. In the doGet() you can place logic to preload data from the DAO class for display. In the doPost() you can place logic to process data for create, update or delete using the DAO class. Finally let it forward the request to a JSP.
In the JSP you can use JSTL/EL to display data. For tabular view you may find the JSTL c:forEach useful. For plain display, just use EL the usual way.

How to connect mysql database using xml

welcome to all,
here my doubt is how to connect mysql database using xml file, how to integrate xml file and jsp file and how to access data from dabase using jsp file. can any one help me
regards

Short answer: you wouldn't do any of those things. The first two are meaningless and the third is a bad practice. I have no idea what those ideas were supposed to achieve so I have no idea what tutorials I should suggest to you.

How to connect mySQL database with jdbc

Who can tell me how to connect mySQL database with jdbc? Thanks

http://onesearch.sun.com/search/developers/index.jsp?and=connect+mysql&nh=10&phr=&qt=&not=&field=title&since=&col=devforums&rf=0&Search.x=24&Search.y=16

How to Connect MySQL Database Through JTable?

Hi,
How to Connect MySQL Database Through JTable? anyone of u knows these concept please send me coding of that Part..
Thanks,
Guru..

Start by reading the tutorials. There's a section on Swing which shows you how to use tables and a section on JDBC which shows you how to use SQL.
And you can always search the forum as well since there are working examples of both posted on the forum.
If you need further help with a specific problem then you need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html], that demonstrates the incorrect behaviour.
Don't forget to use the [Code Formatting Tags|http://forum.java.sun.com/help.jspa?sec=formatting], so the posted code retains its original formatting.

How to connect to database in JSP

Hi, all.
I am using J2EE and cloudscape. I have written all the EJB classes. But now i have no idea that how to connect to database in jsp such as i get user ID from portal, then i connect to database check the existence of user ID and the password then return true or false value. how to write all this in jsp?
Thanks very much!
yayun

this is the required code
i hope this will help u
<html>
<head>
</head>
<body>
<%@ page import="java.sql.*" %>
<%
try
String fu=request.getParameter("username");
String fp=request.getParameter("password");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection Con=DriverManager.getConnection("jdbc:odbc:wind","","");
Statement stmt=Con.createStatement();
ResultSet rs=stmt.executeQuery("select * from table1 where username='"+fu+"' and password='"+fp+"'");
if(rs.next())
%>
<jsp:forward page="success.jsp"/>
<%
else{
%>
<jsp:forward page="unsuccess.jsp"/>
<%
catch(Exception e)
%>
</body>
</html>

Hi can anyone explain me how to syncronize two database using jsp?

Hi can anyone explain me how to syncronize two database using jsp?

I thinking than you really need the jsp page for calling the java methods whith sincronize the database.You think wrong.
You wrote a bad question.What was bad about it?
You need a java method for sincronize the two databases using a jsp page.No you don't, see my answer.

How to integrate mysql database using prerequisites in visual studio 2010

how to integrate mysql database exe file using prerequisites in visual studio 2010 and it should be installed when my exe file starts installing.is it possible to integrate mysql database exe?
S S Manne

As your question appears to be about application deployment, and not about .NET Framework setup (this forum's topic), please ask here:
https://social.msdn.microsoft.com/Forums/en-US/winformssetup/threads
Thank you for your understanding.

How to display and save a picture stored as BLOB in MySQL database in Jsp?

Hello i am doing a dataentry form where in i will display the picture stored as Blob in MySQL database to the browser. The form also allow changing the picture and updating the picture Blob in the database.
How can i do it? I try this
<img src'"<%=rs.getBlob("picture")%> but it doesn't display the picture.
another thing, how can i save it in the database, if is use the file field in the html form?
thanks in advance for your help.

Hello i am doing a dataentry form where in i will display the picture stored as Blob in MySQL database to the browser. The form also allow changing the picture and updating the picture Blob in the database.
How can i do it? I try this
<img src'"<%=rs.getBlob("picture")%> but it doesn't display the picture.
another thing, how can i save it in the database, if is use the file field in the html form?
thanks in advance for your help.

Problem with inserting data into mySQL database with jsp

I have a jsp page that collects infromation about a users vehicle and puts the data into a mySQL database. Iv'e been messing around with it for ages & i can't seem to get it to work even though i cannot see anything wrong with the code, which can be seen below.
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/connection.jsp" %>
<%
// *** Restrict Access To Page: Grant or deny access to this page
String MM_authorizedUsers="";
String MM_authFailedURL="login_form.jsp";
boolean MM_grantAccess=false;
if (session.getValue("MM_Username") != null && !session.getValue("MM_Username").equals("")) {
if (true || (session.getValue("MM_UserAuthorization")=="") ||
          (MM_authorizedUsers.indexOf((String)session.getValue("MM_UserAuthorization")) >=0)) {
    MM_grantAccess = true;
if (!MM_grantAccess) {
String MM_qsChar = "?";
if (MM_authFailedURL.indexOf("?") >= 0) MM_qsChar = "&";
String MM_referrer = request.getRequestURI();
if (request.getQueryString() != null) MM_referrer = MM_referrer + "?" + request.getQueryString();
MM_authFailedURL = MM_authFailedURL + MM_qsChar + "accessdenied=" + java.net.URLEncoder.encode(MM_referrer);
response.sendRedirect(response.encodeRedirectURL(MM_authFailedURL));
return;
String vehicle_details__registration = null;
if(request.getParameter("txt_registration") != null){ vehicle_details__registration = (String)request.getParameter("txt_registration");}
String vehicle_details__make = null;
if(request.getParameter("txt_make") != null){ vehicle_details__make = (String)request.getParameter("txt_make");}
String vehicle_details__model = null;
if(request.getParameter("txt_model") != null){ vehicle_details__model = (String)request.getParameter("txt_model");}
String vehicle_details__colour = null;
if(request.getParameter("txt_colour") != null){ vehicle_details__colour = (String)request.getParameter("txt_colour");}
String vehicle_details__tax_class = null;
if(request.getParameter("select_tax_class") != null){ vehicle_details__tax_class = (String)request.getParameter("select_tax_class");}
String vehicle_details__chasis_num = null;
if(request.getParameter("chasis_num") != null){ vehicle_details__chasis_num = (String)request.getParameter("chasis_num");}
String vehicle_details__status = null;
if(request.getParameter("radio_status") != null){ vehicle_details__status = (String)request.getParameter("radio_status");}
String owner_details__MMColParam = "1";
if (session.getValue("MM_Username") !=null) {owner_details__MMColParam = (String)session.getValue("MM_Username");}
Driver Drivervehicle_details = (Driver)Class.forName(MM_connection_DRIVER).newInstance();
Connection Connvehicle_details = DriverManager.getConnection(MM_connection_STRING,MM_connection_USERNAME,MM_connection_PASSWORD);
PreparedStatement vehicle_details = Connvehicle_details.prepareStatement("INSERT INTO vehicle_man_db.vehicle_details (registartion, make, model, colour, tax_class, chasis_num) VALUES ('"+ String vehicle_details__registration + "', '"+ String vehicle_details__make + "', '"+ String vehicle_details__model + "', '"+ String vehicle_details__colour + "', '"+ String vehicle_details__tax_class + "', '"+ String vehicle_details__chasis_num + "', '"+ String vehicle_details__status + "')");
vehicle_details.executeUpdate();
%>
<form name="add_vehicle_form" id="add_vehicle_form">
<p>Registration mark:
    <input name="txt_registration" type="text" id="txt_registration">
</p>
<p>Make:
    <input name="txt_make" type="text" id="txt_make">
</p>
<p>Model:
    <input name="txt_model" type="text" id="txt_model">
</p>
<p>Colour:
    <input name="txt_colour" type="text" id="txt_colour">
</p>
<p>Tax Class:
    <select name="select_tax_class" id="select_tax_class">
      <option value="AAA">Band AAA (up to 100g/km)</option>
      <option value="AA">Band AA (101 - 120g/km)</option>
      <option value="A">Band A (121 - 150g/km)</option>
      <option value="B">Band B (151 - 165g/km)</option>
      <option value="C">Band C (166 - 185g/km)</option>
      <option value="D">Band D (Over 185g/km)</option>
    </select>
</p>
<p>Chasis Number:
    <input name="txt_chassis_num" type="text" id="txt_chassis_num">
</p>
<p>Status: active:
    <input name="radio_status" type="radio" value="1" checked>
    off-road
    <input name="radio_status" type="radio" value="0">
</p>
<p>
    <input type="submit" name="Submit" value="Submit">
</p>
</form>
<%
Connvehicle_details.close();
%>This is the error I am getting from the server
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 3 in the jsp file: /add_vehicle_form.jsp
Generated servlet error:
C:\Servers\Tomcat 5.0\work\Catalina\localhost\Assignment\org\apache\jsp\add_005fvehicle_005fform_jsp.java:113: ')' expected
PreparedStatement vehicle_details = Connvehicle_details.prepareStatement("INSERT INTO vehicle_man_db.vehicle_details (registartion, make, model, colour, tax_class, chasis_num) VALUES ('"+ String vehicle_details__registration + "', '"+ String vehicle_details__make + "', '"+ String vehicle_details__model + "', '"+ String vehicle_details__colour + "', '"+ String vehicle_details__tax_class + "', '"+ String vehicle_details__chasis_num + "', '"+ String vehicle_details__status + "')");
^
1 error
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:412)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
Any help would be much appreciated.
Thanks

use this ...
PreparedStatement vehicle_details =
Connvehicle_details.prepareStatement("INSERT INTO
vehicle_man_db.vehicle_details (registartion, make,
model, colour, tax_class, chasis_num) VALUES
vehicle_details .setString(1,String
vehicle_details__registration );
vehicle_details setString(2,String
vehicle_details__make );
vehicle_details .setString(3,String
vehicle_details__model );
vehicle_details .setString(4,vehicle_details__colour
vehicle_details .setString(5,String
vehicle_details__tax_class);
vehicle_details .setString(6,String
vehicle_details__chasis_num );
vehicle_details .executeQuery();Even you need a screwing up... what's the point putting that String inside. That's the bloody error.

Question:How to use MySQL database as a service in Oracle Cloud

Hello All,
I want to use MySQL as backend for my application.How can i select MySQL database.Its showing me only to choose Oracle database.
Thanks in advance.

The Oracle Database Cloud Service uses the Oracle Database. You do not have access to the underlying operating system to make the choice you are seeking.
When the Oracle Compute Service comes out later this year, you could use one of those "infrastructure only" environments and load MySQL into it. You would be responsible for all maintenance of MySQL and the environment.
Hope this helps.
- Rick Greenwald

How to conncet mysql database and oracle database 11g2 on linux 5.4

Hi,
Can anyone help me to connect mysql server database to Oracle
database on Linux OS?
I have done all things, but I am getting a problem in installing dg4odbc
driver on Oracle database. In a simple word, I don't know how to create
listener between mysql database and Oracle database.
If anyone knows that please help me in configuring dg4odbc for Oracle. OS
-Linux 5.4 and refer any doc or link.
oracle 11g2 11.2.0.1
i follow the metalink id - 466228.1 ( but cant successed).
Thanks and regards,
pritesh ranjan

hi pl z clear me it is required to install manully the dg4odbc driver for oracle to connect MySQL server database. because in my $ORACLE_HOME/hs/admin/initdg4odbc.ora is present automatically.
details of the initdg4odbc.ora
# This is a sample agent init file that contains the HS parameters that are
# needed for the Database Gateway for ODBC
# HS init parameters
HS_FDS_CONNECT_INFO = mysql_odbc
HS_FDS_TRACE_LEVEL = off
HS_FDS_SHAREABLE_NAME = /usr/lib/libmyodbc5w.so
# ODBC specific environment variables
set ODBCINI=/etc/odbc.ini
set LD_LIBRARY_PATH=/usr/lib
# Environment variables required for the non-Oracle system
#set HOME=/home/oracle
~
~
~
"initdg4odbc.ora" 20L, 437C
details of the listener.ora file
DG4ODBC =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA=(SID=dg4odbc))
(HS=OK)
SID_LIST_ORCL =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = orcl)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = ORCL)
ADR_BASE_DG4ODBC = /u01/app/oracle
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = pritesh11gprim.oracle.com)(PORT = 1521))
ADR_BASE_ORCL = /u01/app/oracle
"listener.ora" [readonly] 37L, 779C 35,0-1 85%
details of tnsname.ora file
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.132)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
DG4ODBC =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
(CONNECT_DATA=(SID=DG4ODBC))
(HS=OK)
MYSQL =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))
(CONNECT_DATA=(SID=MYSQL))
(HS=OK)
when i m going to start the listener it could not be started..
details of the mysql server database
[root@pritesh11gprim ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.10 MySQL Community Server (GPL)
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
mysql> show databases;
| Database |
| information_schema |
| demo |
| mysql |
| performance_schema |
| pritesh |
| test |
6 rows in set (0.01 sec)
if any where i m wrong then plz suggest me......
thanks & regards
pritesh ranjan

How to insert mysql database into DW CC

how can I insert a mysql database into DW CC ? there is no such option in the INSERT-panel.
I know they changed the insert panel in CC but I cannot find any option to insert data at all....please can someone help?....

All data functions were removed from CC.
You can reinstall a lot of it by adding the Legacy Extension available here (about mid way down): http://blogs.adobe.com/dreamweaver/
And/or adding a paid extension from DMX Zone: http://www.dmxzone.com/3/dreamweaver-extensions
There are many, many discussions ongoing about data functionality being removed. You may want to add your voice via the wish form here: https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform

How to ping mysql database in JSP

Similar Messages

Maybe you are looking for