pagination-pageable-sample

A minimal demonstration of offset-based pagination in Java.

What It Demonstrates

Pagination splits a large dataset into fixed-size chunks.

Instead of returning all records at once, the repository returns a single page — a slice of the full result with metadata: current page number, page size, and total record count.

Structure

All code is in a single file: PaginationPageableApplication.java

PaginationPageableApplication.java
│
├── Owner                   # Entity — record with id and name
├── Page<T>                 # Pagination result — content + metadata (page, size, total)
├── Pageable                # Pagination request — page number and size
├── FakeOwnerRepository     # In-memory implementation — applies LIMIT and OFFSET logic
└── PaginationPageableApplication  # Entry point + demo()

Key Points

Pageable describes the request. Page number and size are the only inputs — the repository computes the offset internally.

Page wraps the result. The caller always knows the total number of records and can compute total pages without an extra call.

Simulates LIMIT / OFFSET. FakeOwnerRepository applies the same slicing logic a real database query with LIMIT and OFFSET would do.

Console Output

Page[content=[Owner[id=1, name=jack1], Owner[id=2, name=jack2]], page=0, size=2, total=5]
Page[content=[Owner[id=3, name=jack3], Owner[id=4, name=jack4]], page=1, size=2, total=5]
Page[content=[Owner[id=5, name=jack5]], page=2, size=2, total=5]

Three pages from five records. The last page contains only one record — the remainder after even division.

Run

./mvnw spring-boot:run

See also

• Previous: in-memory-repository-sorting-sample
• Next: pagination-dto-mapping-sample