Correspondence between Java data types and MySQL field types

When interacting with data between Java and MySQL databases, it is crucial to correctly map Java data types to MySQL field types. Different data type correspondences can affect data storage, query and processing efficiency.

1. Integer type

1. Java data types: byte, short, int, long
2. MySQL field types: TINYINT, SMALLINT, INT, BIGINT

2. Floating point type

1. Java data types: float, double
2. MySQL field types: FLOAT, DOUBLE

3. Text type

1. Java data type: String
2. MySQL field types: VARCHAR, TEXT

4. Date and time types

1. Java data types: java.util.Date, java.sql.Timestamp, java.time.LocalDate, java.time.LocalDateTime
2. MySQL field types: DATETIME, TIMESTAMP, DATE, TIME

5. Boolean type

1. Java data type: boolean
2. MySQL field type: BOOLEAN

6. Enumeration type

1. Java data type: Enum
2. MySQL field type: ENUM

7. Big Data Types

1. Java data type: byte[]
2. MySQL field type: BLOB

---

Establishing the correct mapping relationship between Java data types and MySQL field types can ensure that there will be no type conversion errors or data loss when the application interacts with the database. Choosing the appropriate data type can save storage space, improve query efficiency, and thus optimize application performance.