To those in need.
Environment: jdbctemplate, mysql, java
Key points:
1. The page element is defined as dynamicCol_id value_dictionary key_dictionary value, and the value is split
2. The sub-table obtains the main table id, and when it is added, check the maximum id+1 of the main table as the associated field id of the sub-table. To determine whether to add or modify is not based on the id empty as a condition, but add an isadd parameter to determine
3. When saving the main table, exclude parameters starting with dynamic
4. Different data dictionary values of the sub-table are placed in the same sub-table field and value, such as typecode and typevalue
5. To dynamically add page elements, first delete the previous dynamic elements, and then add
6. When modifying, delete the sub-table first and then insert the sub-table