JAVA:
public Map getPage(final Map searchParameters, String salt) {
Map map = new HashMap();
int page = 0;
int pageSize = 10;
Page<User> pageList;
if (searchParameters != null && searchParameters.size() > 0 && searchParameters.get("page") != null) {
page = Integer.parseInt(searchParameters.get("page").toString()) - 1;
}
if (searchParameters != null && searchParameters.size() > 0 && searchParameters.get("pageSize") != null) {
pageSize = Integer.parseInt(searchParameters.get("pageSize").toString());
}
if (pageSize < 1)
pageSize = 1;
if (pageSize > 100)
pageSize = 100;
List<Map> orderMaps = (List<Map>) searchParameters.get("sort");
List<Order> orders = new ArrayList<Order>();
if (orderMaps != null) {
for (Map m : orderMaps) {
if (m.get("field") == null)
continue;
String field = m.get("field").toString();
if (!StringUtils.isEmpty(field)) {
String dir = m.get("dir").toString();
if ("DESC".equalsIgnoreCase(dir)) {
orders.add(new Order(Direction.DESC, field));
} else {
orders.add(new Order(Direction.ASC, field));
}
}
}
}
PageRequest pageable;
if (orders.size() > 0) {
pageable = new PageRequest(page, pageSize, new Sort(orders));
} else {
Sort s = new Sort(Direction.ASC, "userIndex");
pageable = new PageRequest(page, pageSize, s);
}
Map filter = (Map) searchParameters.get("filter");
if (filter != null) {
final List<Map> filters = (List<Map>) filter.get("filters");
Specification<User> spec = new Specification<User>() {
@Override
public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
List<Predicate> pl = new ArrayList<Predicate>();
for (Map f : filters) {
String field = f.get("field").toString().trim();
String value = f.get("value").toString().trim();
if (value != null && value.length() > 0) {
if ("loginName".equalsIgnoreCase(field)) {
pl.add(cb.equal(root.<String>get(field), value));
} else if ("userName".equalsIgnoreCase(field)) {
pl.add(cb.like(root.<String>get(field), value + "%"));
} else if ("email".equalsIgnoreCase(field)) {
pl.add(cb.like(root.<String>get(field), value + "%"));
} else if ("state".equalsIgnoreCase(field)) {
pl.add(cb.equal(root.<Integer>get("state"), value));
}
}
}
// 查询出未删除的
pl.add(cb.equal(root.<Integer>get("flag"), 1));
// pl.add(cb.equal(root.<Integer>get("state"), 1));
return cb.and(pl.toArray(new Predicate[0]));
}
};
pageList = userRepository.findAll(spec, pageable);
} else {
Specification<User> spec = new Specification<User>() {
public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
List<Predicate> list = new ArrayList<Predicate>();
// 查询出未删除的
list.add(cb.equal(root.<Integer>get("flag"), 1));
list.add(cb.equal(root.<Integer>get("state"), 1));
return cb.and(list.toArray(new Predicate[0]));
}
};
pageList = userRepository.findAll(spec, pageable);
}
map.put("total", pageList.getTotalElements());
map.put("users", userList2DtoList(pageList.getContent(), salt));
return map;
}