效果圖：

如圖，根據條件查詢主表資訊，並關聯獲取詳細資料，並實現簡單的排序功能，不多說，上程式碼：

model：

/**
 * @author xj
 * @date 2017/5/3 13:31
 */
@Getter
@Setter
@Entity(name = "BOND_RATE")
public class BondRate {
    @Id
private String id;
    private String bondId;
    private String rateStaff;
    private String postStatus;
    private String internalRate
 
;
    private String rateView;
    private String attachmentId;
    private Date rateTime;
@ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "bondId", insertable = false, updatable = false)
    @JsonIgnore
    @NotFound(action = NotFoundAction.IGNORE)
    private Bond bond;

}

Controller：

/**
 
 * 根據條件查詢債券評級的介面
 *
 * @param bondId
* @param bondName
* @param rateStaff
* @param postStatus
* @param startTime
* @param endTime
* @param pageable
* @return
* @throws ParseException
 */
@GetMapping(value = "/allBondRate")
public Result findAllBondRate(@RequestParam(value = "bondId", required = false) String bondId,
 
@RequestParam(value = "bondName", required = false) String bondName,
@RequestParam(value = "rateStaff", required = false) String rateStaff,
@RequestParam(value = "postStatus", required = false) String postStatus,
@RequestParam(value = "startTime", required = false) String startTime,
@RequestParam(value = "endTime", required = false) String endTime,
@RequestParam(value = "internalRate", required = false) String[] internalRate,
@PageableDefault(value = 15, sort = {"rateTime"}, direction =
                                      Sort.Direction.DESC) Pageable pageable) throws ParseException {
    SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
    if (!StringUtils.isEmpty(startTime) && !StringUtils.isEmpty(endTime)) {
        startTime = startTime + " 00:00:00";
endTime = endTime + " 23:59:59";
}
    Date sTime = null;
Date eTime = null;
    if (!StringUtils.isEmpty(startTime) && !StringUtils.isEmpty(endTime)) {
        sTime = sf.parse(startTime);
eTime = sf.parse(endTime);
}
    Grid grid = bondService.findAllBondRate(bondId, bondName, rateStaff, postStatus, sTime, eTime, internalRate, pageable);
    return ResultUtil.success(grid);
}

/**
 * 根據條件查詢債券評級的方法
 *
 * @param bondId
* @param bondName
* @param rateStaff
* @param postStatus
* @param startTime
* @param endTime
* @param pageable
* @return
*/
public Grid findAllBondRate(final String bondId, String bondName, final String rateStaff, final String postStatus,
                            final Date startTime, final Date endTime, final String[] internalRate, Pageable pageable) {
    /**
     *  內部評級欄位評級排序，特殊處理
     */
if (pageable.getSort().getOrderFor("internalRate") != null) {
        Sort.Order order = null;
        if ("DESC".equals(pageable.getSort().getOrderFor("internalRate").getDirection().toString())) {
            order = new Sort.Order(Sort.Direction.ASC, "internalRate");
} else {
            order = new Sort.Order(Sort.Direction.DESC, "internalRate");
}
        Sort sort = new Sort(order);
pageable = new PageRequest(pageable.getPageNumber(), pageable.getPageSize(), sort);
}
    Specification<BondRate> specification = new Specification<BondRate>() {

        @Override
public Predicate toPredicate(Root<BondRate> root, CriteriaQuery<?> criteriaQuery, CriteriaBuilder cb) {
            Join<BondRate, Bond> bondJoin = root.join("bond", JoinType.LEFT);
ArrayList<Predicate> conditions = new ArrayList();
            if (!StringUtils.isEmpty(bondId)) {
                Path comIdPath = root.get("bondId");
Predicate p1 = cb.equal(comIdPath, bondId);
conditions.add(p1);
}
            if (!StringUtils.isEmpty(rateStaff)) {
                Path rateStaffPath = root.get("rateStaff");
Predicate p2 = cb.equal(rateStaffPath, rateStaff);
conditions.add(p2);
}
            if (!StringUtils.isEmpty(postStatus)) {
                Path postStatusPath = root.get("postStatus");
Predicate p3 = cb.equal(postStatusPath, postStatus);
conditions.add(p3);
}
            if (!StringUtils.isEmpty(startTime) && !StringUtils.isEmpty(endTime)) {
                Path rateTimePath = root.get("rateTime");
Predicate p4 = cb.between(rateTimePath, startTime, endTime);
conditions.add(p4);
}
            if (internalRate != null && internalRate.length > 0) {
                Path internalRatePath = root.get("internalRate");
CriteriaBuilder.In<String> in = cb.in(internalRatePath);
                for (int i = 0; i < internalRate.length; i++) {
                    in.value(internalRate[i]);
}
                conditions.add(in);
}
            Predicate[] p = new Predicate[conditions.size()];
            return cb.and(conditions.toArray(p));
}
    };
Page<BondRate> page = bondRateRepository.findAll(specification, pageable);
Grid grid = new Grid(null, (int) page.getTotalElements());
List list1 = new ArrayList();
list1.add("bondName");
list1.add("bondType");
list1.add("internalRate");
list1.add("rateStaff");
list1.add("rateTime");
list1.add("postStatus");
grid.setIds(list1);
List list2 = new ArrayList();
list2.add("債券名稱");
list2.add("債券類別");
list2.add("內部評級");
list2.add("評級人");
list2.add("評級時間");
list2.add("狀態");
grid.setHds(list2);
grid.setRows(getBondRateList(page.getContent(), null));
    return grid;
}

/**
 * 根據list返回對應要求的list形式
 *
 * @param list
* @param attachmentList
* @return
*/
private List<Map> getBondRateList(List<BondRate> list, List<Attachment> attachmentList) {
    List result = new ArrayList();
    for (BondRate cr : list) {
        Map m = new HashMap();
m.put("id", cr.getId());
m.put("bondId", cr.getBondId());
        if (cr.getBond() != null) {
            m.put("bondName", cr.getBond().getSecuabbr());
m.put("bondType", cr.getBond().getSecucategory());
}
        m.put("internalRate", cr.getInternalRate());
m.put("rateStaff", cr.getRateStaff());
m.put("rateTime", cr.getRateTime());
m.put("postStatus", cr.getPostStatus());
m.put("rateView", cr.getRateView());
//判斷是根據ID查詢還是全部查詢
if (attachmentList != null && attachmentList.size() > 0) {
            List list1 = new ArrayList();
            for (int i = 0; i < attachmentList.size(); i++) {
                Map map = new HashMap();
map.put("uid", attachmentList.get(i).getId());
map.put("name", attachmentList.get(i).getAttachmentName());
list1.add(map);
}
            m.put("attachment", list1);
}
        result.add(m);
}
    return result;
}

// like用法 demo
if (!StringUtils.isEmpty(comName)) {
    Path comNamePath = root.get("companyView").get("chiname");
p = criteriaBuilder.like(comNamePath, "%" + comName + "%");
conditions.add(p);
}

// 條件關聯查詢 demo
if (!StringUtils.isEmpty(industry)) {
    List<Industry> list = industryRepository.findByThird(industry);
    if (list != null && !list.isEmpty()) {
        String industryId = list.get(0).getId();
Path industryIdPath = root.get("industryId");
Predicate p2 = criteriaBuilder.equal(industryIdPath, industryId);
conditions.add(p2);
} else {
        throw new ServiceException(ResultEnum.NO_INDUSTRY);
}
}