Java使用Queryable-pageable实现分页

在维护老项目的时候需要对部分分页进行手动修改、方式是获取前端的分页参数 page以及rows、 new PageRequest对象把分页参数传进去、通过 queryable.setPageable(pageable);保存、最后进行调用。

完整代码如下：

@ResponseBody
    @RequestMapping(value = "getLbjzkList", method = RequestMethod.GET)
    @PageableDefaults(sort = "id=desc")
    private void ajaxList(Queryable queryable, PropertyPreFilterable propertyPreFilterable, HttpServletRequest request,
        HttpServletResponse response) throws IOException {
        EntityWrapper<LbjZk> entityWrapper = new EntityWrapper<LbjZk>(entityClass);
        propertyPreFilterable.addQueryProperty("id");
        propertyPreFilterable.addQueryProperty("name");
       Integer page= Integer.parseInt(request.getParameter("page").toString());
       Integer rows= Integer.parseInt(request.getParameter("rows").toString());

        // 预处理
        queryable.setPageable(new PageRequest(page, rows));
        QueryableConvertUtils.convertQueryValueToEntityValue(queryable, entityClass);
        SerializeFilter filter = propertyPreFilterable.constructFilter(entityClass);
        PageJson<LbjZk> pagejson = new PageJson<LbjZk>(lbjZkService.list(queryable,entityWrapper));
        String content = JSON.toJSONString(pagejson, filter);
        StringUtils.printJson(response, content);
    }

PageJson分页工具类：

package com.railway.core.model;

import java.io.Serializable;
import java.util.List;

import com.railway.core.query.data.Page;

/**
 * 页面展示分页
 * 
 * @author lyy
 *
 * @param <T>
 */
public class PageJson<T> implements Serializable {
  private static final long serialVersionUID = 1L;
  private long page = 1;// 当前页
  private long rows = 10;// 每页显示记录数
  private long total; // 总数
  private long totalPages; // 总页数
  private List<T> results; // 结果

  public PageJson() {

  }

  public PageJson(List<T> results) {
    this(0, Long.MAX_VALUE, Long.MAX_VALUE, results);
  }

  public PageJson(Page<T> page) {
    this(page.getNumber(), page.getSize(), page.getTotalElements(), page.getContent());
  }

  public PageJson(long page, long rows, long total, List<T> results) {
    this.page = page;
    this.rows = rows;
    this.total = total;
    this.results = results;
    this.totalPages = getRows() == 0 ? 1 : (int) Math.ceil((double) total / (double) getRows());
  }

  public long getPage() {
    return page;
  }

  public void setPage(long page) {
    this.page = page;
  }

  public long getRows() {
    return rows;
  }

  public void setRows(long rows) {
    this.rows = rows;
  }

  public long getTotal() {
    return total;
  }

  public void setTotal(long total) {
    this.total = total;
  }

  public long getTotalPages() {
    return totalPages;
  }

  public List<T> getResults() {
    return results;
  }

  public void setResults(List<T> results) {
    this.results = results;
  }

}