Java forwarding and redirection differences and instance code _java

Forwarding and redirection in Java

Forward:

Request.getrequestdispatcher ("success.jsp"). Forward (Request,response);

After the server component receives a user request. After it has been processed, it is passed to another component. The user's request code is not modified. A frame that is returned to a user, such as a home page, after each component has been processed.

User Request-----Server-------Component 1-------component 2-------> server-------User

(The request does not change)

Redirect:

Response.sendredirect ("success.jsp");

After the server component receives a user request. Modify user requests after processing. Returned to the user. This allows the user to use the request again passively using the new request. (redirect is usually to prevent users from submitting data after the point of browser refresh or point back to produce duplicate submissions)

User Request-----"server-------" component------> Server-------user-------"new request

(Modify user request)

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