Java后端实现-元素拖动排序ApiOperation value 板块拖动排序 ApiImplicitP ApiImplicitP name plateId1 value 拖拽体 ApiImplicitP name plateId2 value 参照体 ApiImplicitP name type value 实现类型 1 交换位置 2 挤压位置
@ApiOperation(value = "板块拖动排序") @ApiImplicitParams({ @ApiImplicitParam(name = "plateId1", value = "拖拽体"), @ApiImplicitParam(name = "plateId2", value = "参照体"), @ApiImplicitParam(name = "type", value = "实现类型1交换位置2挤压位置") }) @PostMapping("plateSort") public ServiceResult plateSort(@RequestParam @NotNull Integer plateId1, @RequestParam @NotNull Integer plateId2, @RequestParam @NotNull @Max(2) @Min(1) Integer type) { //元素原地拖动 if (plateId1.equals(plateId2)) { return success(); } LambdaQueryWrapper
wrapper = new LambdaQueryWrapper<>(); if (type == 1) { //两个元素交换位置 wrapper .eq(TiebaPlate::getId, plateId1) .or() .eq(TiebaPlate::getId, plateId2); List
list = tiebaPlateService.list(wrapper); int x = list.get(0).getOrderNum(); int y = list.get(1).getOrderNum(); list.get(0).setOrderNum(y); list.get(1).setOrderNum(x); //将collect更新到数据库 boolean result = tiebaPlateService.updateBatchById(list); Assert.isTrue(result, "服务器异常"); return success(); } else if (type == 2) { if (plateId1 < plateId2) { //将plateId1位置拖到plateId2位置下面 wrapper .between(TiebaPlate::getId, plateId1, plateId2); List
list = tiebaPlateService.list(wrapper); List
collect = list.stream().sorted(Comparator.comparingInt(TiebaPlate::getOrderNum)).collect(Collectors.toList()); //排序标记 int[] orderNums = collect.stream().mapToInt(TiebaPlate::getOrderNum).toArray(); //将首位元素挪到末尾 TiebaPlate first = collect.get(0); collect.remove(first); collect.add(first); //将集合元素和排序标记绑定 for (int i = 0; i < orderNums.length; i++) { collect.get(i).setOrderNum(orderNums[i]); } //将collect更新到数据库 boolean result = tiebaPlateService.updateBatchById(collect); Assert.isTrue(result, "服务器异常"); return success(); } else { //将plateId2位置拖到plateId1前面 wrapper .between(TiebaPlate::getId, plateId2, plateId1); List
list = tiebaPlateService.list(wrapper); List
collect = list.stream().sorted(Comparator.comparingInt(TiebaPlate::getOrderNum)).collect(Collectors.toList()); //排序标记 int[] orderNums = collect.stream().mapToInt(TiebaPlate::getOrderNum).toArray(); //将末尾元素追加到首位 TiebaPlate last = collect.get(collect.size() - 1); collect.remove(last); Collections.reverse(collect); collect.add(last); Collections.reverse(collect); //将集合元素和排序标记绑定 for (int i = 0; i < orderNums.length; i++) { collect.get(i).setOrderNum(orderNums[i]); } //将collect更新到数据库 boolean result = tiebaPlateService.updateBatchById(collect); Assert.isTrue(result, "服务器异常"); return success(); } } return failure(); }
思路:如何优雅的实现数据置顶、置尾、交换、拖动排序？ – 简书
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