java next page

How to turn to the next page?

1. Use the Pagination API: Use limit() and skip() methods to implement pagination.
2. Manually manage paging: determine the number of records per page, calculate the page number, and use the subList() method to obtain the current page record.

How to turn to the next page in Java

How to turn to the next page

In Java, you can turn to the next page by using the following methods:

• Using the Pagination API
• Manually manage paging

Using the Pagination API

Java 8 introduces limit() and skip() methods of java.util.stream.Stream interface, which can implement the pagination function.

 <code class="java">// 获取前10 条记录List<item> firstPage = items.stream() .limit(10) .collect(Collectors.toList()); // 获取第2 页，每页10 条记录List<item> secondPage = items.stream() .skip(10) .limit(10) .collect(Collectors.toList());</item></item></code>

Manually manage paging

If you cannot use the API, you can manually manage the paging:

1. Determine the number of records per page: Determine the number of records to be displayed per page.
2. Calculate page number: Calculate page number based on the number of records per page and the total number of records.
3. Get the current page record: Use List.subList() method to get the current page record.

 <code class="java">int pageSize = 10; int currentPage = 2; List<item> allItems = ...; int startIndex = (currentPage - 1) * pageSize; int endIndex = startIndex pageSize; List<item> currentPageItems = allItems.subList(startIndex, endIndex);</item></item></code>

Notice:

• limit() method returns a new stream and does not modify the original stream.
• The skip() method returns a new stream, skipping the specified number of elements.
• When managing paging manually, boundary situations need to be handled, such as page numbers out of range.

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