Posts

how to forward servlet request to another servlet or jsp

By -
In this servlet example I will show you how to forward request to another Servlet or JSP page. Imagine that you have a servlet called ForwardServlet and a JSP called result.jsp. result.jsp is kept inside WEB-INF/pages folder. Whenever a form is submitted to ForwardServlet, it does some processing and then forwards the request to result.jsp. Here is the code snippet that can achieve this. Forward request to JSP In this example, I just print the value of name parameter and forward the request to result.jsp import java.io.IOException ;   import javax.servlet.RequestDispatcher ; import javax.servlet.ServletException ; import javax.servlet.http.HttpServlet ; import javax.servlet.http.HttpServletRequest ; import javax.servlet.http.HttpServletResponse ;   public class ForwardServlet extends HttpServlet {           protected void doPost ( HttpServletRequest request, HttpServletResponse response ) throws ServletException, I...
Post a Comment
Read more

Creating Web Services with Apache Axis - O'Reilly Media

By -
Creating Web Services with Apache Axis - O'Reilly Media
Post a Comment
Read more

Adding dynamic content via expressions in jsp

By -
any HTML file can be turned into a JSP file by changing its extension to .jsp.  Of course, what makes JSP useful is the ability to embed Java.  Put the following text in a file with .jsp extension (let us call it hello.jsp ), place it in your JSP directory, and view it in a browser.  <HTML> <BODY> Hello!  The time is now <%= new java.util.Date() %> </BODY> </HTML> Notice that each time you reload the page in the browser, it comes up with the current time. The character sequences <%= and %> enclose Java expressions, which are evaluated at run time. This is what makes it possible to use JSP to generate dyamic HTML pages that change in response to user actions or vary from user to user. Exercise :   Write a JSP to output the values returned by System.getProperty for various system properties such as java.version, java.home, os.name, user.name, user.home, user.dir etc.  
Post a Comment
Read more

jdbc Statements to update and execute query

By -
Image
JDBC Drivers The connection to the database is handled by the JDBC Driver class. The Java SDK contains only one JDBC driver, a jdbc-odbc bridge that can communicate with an existing Open DataBase Conectivity (ODBC) driver. Other databases need a JDBC driver specific to that database. To get a general idea of what the JDBC driver does, you can examine the JDCConnectionDriver.java file. The JDCConnectionDriver class implements the java.sql.Driver class and acts as a pass-through driver by forwarding JDBC requests to the real database JDBC Driver. The JDBC driver class is loaded with a call to Class.forName(drivername) . These next lines of code show how to load three different JDBC driver classes:   Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");   Class.forName("postgresql.Driver");   Class.forName("oracle.jdbc.driver.OracleDriver"); Each JDBC driver is configured to understand a specific URL so multiple JDBC drivers ca...
Post a Comment
Read more

jdbc query execution

By -
import java.sql.* ;   class JDBCQuery {  public static void main( String args[] )  {   try      {       // Load the database driver       Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" ) ;         // Get a connection to the database       Connection conn = DriverManager.getConnection( "jdbc:odbc:Database" ) ;         // Print all warnings       for( SQLWarning warn = conn.getWarnings(); warn != null; warn = warn.getNextWarning() )          {           System.out.println( "SQL Warning:" ) ;           System.out.println( "State  : " + warn.getSQLState()  ) ;    ...
Post a Comment
Read more

inserting multiple values in table at a time

By -
What is the optimal way to insert multiple rows (around 1000) from a web application into a table? The user enters multiple lines into a text box (up to 10,000). The ASP.NET application breaks that data into a string array. Each line is an item of that array. The user clicks Submit. I want to insert all those lines into a table in SQL Server. I know that with MySQL 4.00 and newer, I can simply issue the following command: INSERT INTO Table1 (field1) VALUES ('apple'), ('pear'), ('soda'), ('drink') This will very quickly insert all those values into Table1.field1. I know that in SQL Server, I can use a BULK INSERT from a file or BCP. However, I need to do the insert from a web application. It is better to create one large SqlCommand with all the insert statements: INSERT Table1 (field1) VALUES ('apple'); INSERT Table1 (field1) VALUES ('pear'); INSERT Table1 (field1) VALUES ('fruit'); INSERT Table1 (field...
Post a Comment
Read more

mysql jdbc connection code

By -
package com.test; import java.sql.*;   public class MysqlConnect{   public static void main(String[] args) throws Exception {     System. out .println( "MySQL Connect Example." );     Connection conn = null ;     String url = "jdbc:mysql://localhost:3306/" ;     String dbName = "test" ;     String driver = "com.mysql.jdbc.Driver" ;     String userName = "fff" ;     String password = "bbb" ;     try {       Class. forName (driver).newInstance();       conn = DriverManager. getConnection (url+dbName,userName,password);       System. out .println( "Connected to the database" );       conn.close();       System. out .println( ...
Post a Comment
Read more