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分页查询：时间筛选+日期筛选+增加queryWrapper 筛选条件

news 2025/9/17 7:22:30

文章结构建议：

1. 引言

介绍实际业务场景：银行诉讼提醒系统
需要实现的功能：分页查询 + 复杂条件过滤

2. 核心代码分析

2.1 Controller层 - REST API入口

@GetMapping("/page")
@Operation(summary = "获得诉讼提醒分页")
@PreAuthorize("@ss.hasPermission('bank:remind-lawsuit:query')")
public CommonResult<PageResult<RemindLawsuitRespVO>> getRemindLawsuitPage(@Valid RemindLawsuitPageReqVO pageReqVO) {PageResult<RemindLawsuitRespVO> pageResult = remindLawsuitService.getRemindLawsuitPage(pageReqVO);return success(pageResult);
}

关键点分析：

使用Swagger注解@Operation进行API文档说明
权限控制@PreAuthorize确保安全访问
参数校验@Valid保证数据完整性
接收请求参数 pageReqVO。
调用 Service，返回分页数据。
用 CommonResult 包装统一响应。

2.2 Service层 - 业务逻辑处理

@Override
public PageResult<RemindLawsuitRespVO> getRemindLawsuitPage(RemindLawsuitPageReqVO pageReqVO) {LambdaQueryWrapperX<RemindLawsuitDO> queryWrapper = new LambdaQueryWrapperX<RemindLawsuitDO>().eqIfPresent(RemindLawsuitDO::getCustCode, pageReqVO.getCustCode()).likeIfPresent(RemindLawsuitDO::getCustName, pageReqVO.getCustName()).likeIfPresent(RemindLawsuitDO::getDeptName, pageReqVO.getDeptName()).eqIfPresent(RemindLawsuitDO::getCustType, pageReqVO.getCustType()).betweenIfPresent(RemindLawsuitDO::getRemindTime, pageReqVO.getRemindTime());addOverdueTimeCondition(queryWrapper, pageReqVO);IPage<RemindLawsuitRespVO> page = new Page<>(pageReqVO.getPageNo(), pageReqVO.getPageSize());page = remindLawsuitMapper.getRemindLawsuitPage(page, queryWrapper);return new PageResult<>(page.getRecords(), page.getTotal());
}

技术亮点：

使用LambdaQueryWrapperX链式调用，代码简洁易读
eqIfPresent、likeIfPresent等方法避免空值判断
将复杂条件封装到独立方法中，提高代码可维护性
LambdaQueryWrapperX 用来拼接动态条件（只有参数不为空才生效）。
addOverdueTimeCondition 封装了“逾期 1-30 天 / 31-90 天 / 90 天以上”的条件。
最终调用 remindLawsuitMapper.getRemindLawsuitPage 执行分页。

2.3 复杂条件处理 - 逾期时间分段查询

private void addOverdueTimeCondition(LambdaQueryWrapperX<RemindLawsuitDO> queryWrapper, RemindLawsuitPageReqVO pageReqVO) {if (pageReqVO.getKey() != null && pageReqVO.getKey() > 0) {if (1 == pageReqVO.getKey()) {// 1-30天逾期LocalDateTime[] timeRange = get1_30();queryWrapper.between(RemindLawsuitDO::getExpireTime, timeRange[0], timeRange[1]);} else if (31 == pageReqVO.getKey()) {// 31-90天逾期LocalDateTime[] timeRange = get31_90();queryWrapper.between(RemindLawsuitDO::getExpireTime, timeRange[0], timeRange[1]);} else if (90 == pageReqVO.getKey()) {// 90天以上逾期queryWrapper.lt(RemindLawsuitDO::getExpireTime, get90_());}}
}

2.4 Mapper层 - XML配置

IPage<RemindLawsuitRespVO> getRemindLawsuitPage(IPage<RemindLawsuitRespVO> page, 
@Param("ew") LambdaQueryWrapper<RemindLawsuitDO> queryWrapper);

<select id="getRemindLawsuitPage"resultType="com....controller.admin.remindlawsuit.vo.RemindLawsuitRespVO">selectm.*from ux_remind_lawsuit mWHERE 1 = 1<if test="ew != null"><if test="ew.sqlSegment != null"><if test="ew.sqlSegment != ''">AND ${ew.sqlSegment}</if></if></if>and m.deleted = 0ORDER BY m.remind_time ASC, m.id DESC
</select>