JSP learning Diary

I,

Declaration <%! %> Used for definition

Expression (exception) <% = %> is used to display the returned value or variable value: outputs the operation result to the screen using the value of the variable or method, any form of variables can be used between the "<% =" and "%>" tags. JSP Container converts the value in the tag to a string and outputs it to the client. The function is the same as that of the tostring () method in Java. You do not need to add a semicolon ";" after the statement result ";"

Small scriptProgram(Scriptlets) <%> mark the execution script language

Stmt.exe cutequery (): Execute select and other query statements

Stmt.exe cuteupdate (): Execute insert/update/delete, create table/view, and other data definition statements to return the number of affected rows.