Internship log - day04

Scattered records

LoginPage

First of all ： Request login
second ： Request main page
Two requests

1. Landing successful , Draw the interface of successful login

2. Use forward The way （ Transfer problems that cannot be handled to others ）
Or use Redirect The way （ Jump to the main page after login and the address bar changes , Two requests , Two ruquest object , Browser address bar changes , Application ： If there is form data in the request , And data is very important , Cannot submit repeatedly , If the request is servlet Cannot process after receiving , Need to give a suggestion , This suggestion can handle this request request Where is the ）

3. notes ：
forward :JSP The container uses an internal method to call the target page , The new page continues to process the same request , And browsers won't know about this process .
Redirect : The first page tells the browser to send a new page request .

3. Enter... In the browser ：localhost：8080/Test_Login/LoginPage
After entering login, the page jumps from the login interface to the main page , And the address bar changes

4. Store user data in a certain location ,session
Start the server , Access page

F5,network You can view the change information of the page
5. Add a button , Realize jump , View personal information