spring jpa动态条件查询并分页

@GetMapping("/api/listPage")
@ResponseBody
public Map<String, Object> listPage(@RequestParam(value = "pageNumber", defaultValue = "1") Integer pageNumber,
@RequestParam(value = "pageSize", defaultValue = "100") Integer pageSize,
@RequestParam("searchName") String searchName, @RequestParam("searchUrl") String searchUrl) {
//Pageable默认从0开始
pageNumber = pageNumber <= 0 ? 0 : pageNumber - 1;
Pageable pageable = new PageRequest(pageNumber, pageSize);
//        Page<Monitor> monitorList = monitorRepository.findMonitorByNameOrUrl(pageable, searchName, urlPath);
Specification specification = new Specification() {
@Override
public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) {
List<Predicate> predicates = new ArrayList<>();
if (StringUtils.isNotBlank(searchName)) {
predicates.add(cb.like(root.get("name"), "%" + searchName + "%"));
}
if (StringUtils.isNotBlank(searchUrl)) {
predicates.add(cb.like(root.get("url"), "%" + searchUrl + "%"));
}
return cb.and(predicates.toArray(new Predicate[predicates.size()]));
}
};
Page<Monitor> monitorList = monitorRepository.findAll(specification, pageable);
Map<String, Object> result = new HashMap<>();
result.put("total", monitorList.getTotalElements());
result.put("rows", monitorList.getContent());
return result;
}