spring data elasticsearch如何使用offset和limit来查询 [英] How spring data elasticsearch use offset and limit to query

问题描述

spring data elasticsearch如何使用offset和limit来查询.我想使用偏移量和限制参数来查询页面.但我找不到方法支持.例如:

How spring data elastisearch use offset and limit to query. I want to use offset and limit param to query page.But I can not find methods support. For Example:

    queryBuild.withPageable(PageRequest.of(pageIndex, pageSize));
    Page<Content> content = elasticsearchOperations.queryForPage(queryBuild.build(),Content.class);

应该没问题

但是我找不到带有偏移和限制的方法

But I can not found method with offset and limit

    queryBuild.withPageable(PageRequest.of(offset, limit));

推荐答案

我也有同样的问题，所以实现了下面的类

I have the same problem, so I implemented the following class

import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;

public class OffsetLimitPageable implements Pageable {

    private int offset;
    private int page;
    private int size;
    private Sort sort = Sort.unsorted();

    protected OffsetLimitPageable(int offset, int page, int size) {
        if (offset < 0) {
            throw new IllegalArgumentException("Offset must not be less than zero!");
        }

        if (page < 0) {
            throw new IllegalArgumentException("Page index must not be less than zero!");
        }

        if (size < 1) {
            throw new IllegalArgumentException("Page size must not be less than one!");
        }

        this.offset = offset;
        this.page = page;
        this.size = size;
    }

    public static OffsetLimitPageable of(int offset, int page, int size) {
        return new OffsetLimitPageable(offset, page, size);
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#getPageNumber()
     */
    @Override
    public int getPageNumber() {
        return page;
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#getPageSize()
     */
    @Override
    public int getPageSize() {
        return size;
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#getOffset()
     */
    @Override
    public long getOffset() {
        return offset + page * size;
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#getSort()
     */
    @Override
    public Sort getSort() {
        return sort;
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#next()
     */
    public Pageable next() {
        return of(offset, page + 1, size);
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#previousOrFirst()
     */
    public Pageable previousOrFirst() {
        return hasPrevious() ? of(offset, page - 1, size) : first();
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#first()
     */
    public Pageable first() {
        return of(offset, 0, size);
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.domain.Pageable#hasPrevious()
     */
    public boolean hasPrevious() {
        return page > 0;
    }
}

而且，像这样使用

queryBuild.withPageable(OffsetLimitPageable.of(offset, page, limit));

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