Cookies in Servlet

Cookies are text files that are sent by Servlet to the Web Browsers and are used to track various information's about the user.

Cookies in Servlet


Cookies in Servlet

Cookies are text files that are sent by Servlet to the Web Browsers that uniquely identifies a client. Browsers store cookies on local computer.

Cookies are used to track various informations. Whenever a browser sends a request to browser, it also sends the information stored in the local computer so that server can identify the user.

A cookie has a name, a value, optional attributes and a version number.

HttpServletResponse.addCookie(javax.servlet.http.Cookie) method is used by servlet to send cookies to the browser

A browser can store up to 20 cookies for each Web server and a total of 300 cookies.

HttpServletRequest.getCookies() method is used to retrieve cookies.

Cookies can have same name but they always have different path attributes.

Cookies affect the Web pages cache.

Servlet Cookie Methods:

java.lang.Object clone(): overrides java.lang.Object.clone method and returns a copy of this cookie

java.lang.String getComment(): returns the comment attached to this cookie

java.lang.String getDomain(): returns the domain name set for this cookie

int getMaxAge(): returns the maximum age of the cookie in seconds

java.lang.String getName(): returns the cookie's name

java.lang.String getPath(): returns the path on the server where the browser will return this cookie

boolean getSecure(): if the browser sends cookies on a secure protocol, it returns true else false

java.lang.String getValue(): returns cookie's value

int getVersion(): returns the version of the protocol cookie follows

void setComment(java.lang.String purpose): specifies cookie's purpose

void setDomain(java.lang.String pattern): specifies the domain in which cookie must be presented

void setMaxAge(int expiry): sets cookie's maximum age in seconds

void setPath(java.lang.String uri): specifies a path for the client to return the cookie

void setSecure(boolean flag): indicates that the cookie must be sent using a secure protocol

void setValue(java.lang.String newValue): When a cookie has been created, it assigns new value to cookie.

void setVersion(int v): Sets the version of the cookie.

Tutorials

  1. Accessing Database from servlets through JDBC!
  2. History of web application
  3. Web Server
  4. Servlet Container
  5. Life cycle of Servlet
  6. Features of Servlets 2.4
  7. How to run a servlet
  8. Snooping Headers
  9. Dice Roller
  10. Simple Counter In Servlet
  11. Getting Init Parameter Names
  12. Multiple values for a single parameter
  13. Snooping the server
  14. Send Redirect in Servlet
  15. Session Tracking
  16. To Determine whether the Session is New or Old
  17. Pre- Existing Session
  18. Get Session Id
  19. Inserting Data In Database table using Statement
  20. Retrieving Data from the table using Statement
  21. Inserting data from the HTML page to the database
  22. Retrieving Data from the table using PreparedStatement
  23. Getting Columns Names using Servlets
  24. Getting Number of Columns
  25. Getting Number of Rows
  26. Deleting Rows From Table
  27. Deleting All Rows From the database Table
  28. How to add a column in a table
  29. Changing column name
  30. insert into statement in sql using servlets
  31. join tables mysql
  32. Natural Left Join
  33. Servlet Tutorials Links
  34. sendRedirect
  35. Random Redirector
  36. Servlet Context
  37. HttpSessionListener
  38. Inserting Image in a database Table
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  40. How to delete a table in mysql