Advantages of java servlet over CGI ...?

[angilpari1122]

Hello friend,

Please tell me, What are the advantages of java servlet over CGI ..?

[niharikadutt]

Advantages of servlet:
1) Platform Independent

• Platform Independence plays a major in the field where there are numerous number of web servers available to choose from.
• Servlets are written entirely in java, due to which they are platform independent.
• Servlets can run on any servlet enabled web-server.

Ex: web applications developed in windows machine running java web server, can easily run the same on apache web server ( if Apache server is installed ), without any modification or compilation of code.

2) Performance

• Due to interpreted nature of java, programs written in java are slow. But java servlets run very fast. it is because the way servlets run on web server.
• For any program Initialization takes significant amount of time in its life cycle. But in case of servlets initialization takes place only once when it receives the first request & remains in memory till times out or server shuts down's.
• Once servlet is initialized & loaded, to handle a new request it simply creates a new thread and runs service method of servlet.
• In case of CGI scripts, always a new process should be created to serve a request.

3) Extensibility

• Servlets are developed in java which is robust, well-designed & Object oriented language which can be extended or polymorphed into a new object
• java servlets take all java's advantages to provide the ideal solution.

4) Safety

• Java provides very good safety feature's like Memory management, Exception handling etc.
• Servlets inherit all these features & had emerged as a very powerful web server extension.

5) Security

• Since servlets are server side Components, it inherits the security of server.
• Servlets are also benefited with java security manager, provided by web server.