mybatis LambdaQueryWrapper之复杂与或非sql逻辑编写

chao09_012024-06-21 1:06

LambdaQueryWrapper可自动生成sql表达式，对于复杂情况，可参考以下写法：

java 复制代码

queryWrapper.and(true,wrapper->{
	wrapper.eq(true, EmployeeCheckPO::getCid, employeeCheckPO.getCid());
	wrapper.eq(StrUtil.isNotBlank(employeeCheckPO.getCheckMonth()), EmployeeCheckPO::getCheckMonth, employeeCheckPO.getCheckMonth());
	wrapper.like(StringUtils.isNotBlank(employeeCheckPO.getUsername()), EmployeeCheckPO::getUsername, employeeCheckPO.getUsername());
});
queryWrapper.and(true,wrapperNew->{
	wrapperNew.and(true,queryWrapper1->{
		queryWrapper1.eq(EmployeeCheckPO::getDelFlag, DelFlagEnum.N.getValue());
		queryWrapper1.eq(Objects.nonNull(employeeCheckPO.getCid()), EmployeeCheckPO::getCid, employeeCheckPO.getCid());
		queryWrapper1.eq(EmployeeCheckPO::getStatus,0);
		queryWrapper1.eq(EmployeeCheckPO::getUserId,employeeCheckPO.getUserId());
	})
			.or(true,queryWrapper2->{
				queryWrapper2.eq(EmployeeCheckPO::getDelFlag, DelFlagEnum.N.getValue());
				queryWrapper2.eq(Objects.nonNull(employeeCheckPO.getCid()), EmployeeCheckPO::getCid, employeeCheckPO.getCid());
				queryWrapper2.eq(EmployeeCheckPO::getStatus,1);
				queryWrapper2.eq(EmployeeCheckPO::getProcessSupervisorId,employeeCheckPO.getUserId());
			}).or(true,queryWrapper3->{
		queryWrapper3.eq(EmployeeCheckPO::getDelFlag, DelFlagEnum.N.getValue());
		queryWrapper3.eq(Objects.nonNull(employeeCheckPO.getCid()), EmployeeCheckPO::getCid, employeeCheckPO.getCid());
		queryWrapper3.eq(EmployeeCheckPO::getStatus,1);
		queryWrapper3.isNull(EmployeeCheckPO::getProcessSupervisorId);
		queryWrapper3.eq(EmployeeCheckPO::getProcessLeaderId,employeeCheckPO.getUserId());
	});
});
queryWrapper.orderByDesc(EmployeeCheckPO::getCheckMonth);

复制代码

上述sql逻辑解读为：wrapper集合 && (wrapperNew)；
其中wrapperNew包括queryWrapper1 || queryWrapper2 || queryWrapper3