Java basics-Summary of common JSP/bean technologies in Web Development)

I. array hash table attribute classes
It involves general array definitions, Java special array vector usage, hashtable properties usage, etc.

Ii. String floating point operation
MySQL storage is replaced by string search, which is rarely used in floating-point operations, but occasionally requires simple applications.

3. directory file operations
Functions such as directory file copy, transfer, and rename

4. Processing of JSP/bean error messages
When JSP/bean are combined, the error message is complicated and it is necessary to set a unified operation error report interface.

V. Database Operations
Write related data beans using MySQL as the class;