forward() | sendRedirect() |
it is used to invoke another server from one servlet with is same server | it can send request to page on another server |
It forward the same request and response object from one servlet to another servlet. | It does not send request and response object to another servlet. |
Redirection occures within server. | it sends response code to client side application to send the request to another serlver or resoures. |
this method is availabe through RequestDispatcher Object. | This is method of response object. |
It transfer control to another servlet for further processing | It send response to browser and then browser agian sends request for second servlet or resource |
Data submitted to first servlet will be availble for second servlet. | Data of first servlet is not availble for secind servlet. |
HSQLDB is a portable RDBMS implemented in pure java. It can be embedded with your application as well as can be used separately. It is very a small database that supports almost all features of the standard database system. It comes with small jar file that can be found in lib folder. The HSQLDB jar package is located in the /lib directory of the ZIP package and contains several components and programs. Core components of jar file are : HyperSQL RDBMS Engine (HSQLDB), HyperSQL JDBC Driver, Database Manager, and Sql Tool. Installing and Using Download: download latest release of HyperSQL database from http://hsqldb.org website and extract it. You will see following contents. Here "bin" directory contains some batch files those can be used to run a swing based GUI tool. You can use runManagerSwing.bat to connect to database, but database must be on before running it. Directory lib contains File hsqldb.jar . It is the database to be used by you. Running database First
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