Examples of common Java interfaces

This document is documented in the one months of the development process of the front and back, the record Java Common Interface example, in case of time to forget: Java Common interface, as follows: Return object/return array/Return Boolean value Insert data/modify data/delete data
Exact query/fuzzy query max /min Multi-table multi-criteria query, return list of multiple table query corresponding property, return list with target attribute uniqueness validation The Java ToolPak is used as follows: enumeration classes use functions with the "max" scenario: automatically get employee number; Description: one Table, query maximum value; code: "Controller Layer"

"Service Layer"

"DAO Layer-XML (DAO layer code encapsulates SQL statement for data query)"

"Multi-table multi-criteria query, return list" Application scenario: Query product columns according to product attributes; Description: Two tables, according to the conditions of table 1 (multi-Select) query table 2 data; thought: The front-end query condition returns the "A,b,c" string, the backend accepts the decomposition needs a circular query; code: "Service Layer"

"DAO Layer-XML"

Examples of common Java interfaces