需求:根据一个String类型的year,要求查询出该年的所有记录;
比如根据2018年查询出2018年01月01日到2018年12月31日之间的记录;
public List<Rain> findAllByYear(String year) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String start = year+"-01-01 00:00:00";
String end = Integer.valueOf(year)+1+"-01-01 00:00:00";
Date startTime = sdf.parse(start);
Date endTime = sdf.parse(end);
System.out.println(startTime);
System.out.println(endTime);
Specification querySpecifi = new Specification<Rain>(){
@Override
public Predicate toPredicate(Root<Rain> root, CriteriaQuery<?> query, CriteriaBuilder criteriaBuilder) {
List<Predicate> predicates = new ArrayList<>();
if (year != null){
predicates.add(criteriaBuilder.between(root.get("createTime"),startTime,endTime));
}
return criteriaBuilder.and(predicates.toArray(new Predicate[predicates.size()]));
}
};
return rainDao.findAll(querySpecifi);
}