Request. getsession. setattribute () is used to obtain the Session of the current session and then setattribute to the session. The valid range is session rather than request. Request. setattribute () is the process from setattribute to request, and the valid range is request. The session is valid during a session period. For example, when you access a forum and log on, your username and other information are saved to the session. Before the session expires or you close the page, user name information can be obtained through request. getsession (). getattribute () method. The request is valid between the URLs of the current request. For example, if you request a servlet, you can use the request. the getattribute () method is obtained, and when you jump back, the information will not exist.
Difference between request. getsession (). setattribute ("",...) and request. setattribute ("",...)
