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  • 关于sql查询,按时间段查询

    //service 层
    SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    // 获取当天凌晨0点0分0秒Date
    Calendar begin = Calendar.getInstance();
    begin.set(begin.get(Calendar.YEAR), begin.get(Calendar.MONTH), begin.get(Calendar.DAY_OF_MONTH),
    0, 0, 0);
    Date beginOfDate = begin.getTime();
    // 获取当天23点59分59秒Date
    Calendar end = Calendar.getInstance();
    begin.set(end.get(Calendar.YEAR), end.get(Calendar.MONTH), end.get(Calendar.DAY_OF_MONTH),
    23, 59, 59);
    Date endOfDate = begin.getTime();

    List<String> list = null;
    try {
    list = hisOutpatientMapper.findTermialList(sf.format(beginOfDate), sf.format(endOfDate));
    for (int i = 0; i < list.size(); i++) {
    String id = list.get(i);
    logger.info("当天需要会诊账号 {}", id);
    }
    } catch (Exception e) {
    logger.info("获取终端账号异常 {}", e.getMessage());
    }

    //dao层接口

    List<String> findTermialList(@Param("begin") String begin, @Param("end") String end);
    //mapper.xml
    <select id="findTermialList" parameterType="java.lang.String" resultType="java.lang.String">
    SELECT account FROM tb_conf_user WHERE hospital_id IN(
    SELECT DISTINCT hospital_id FROM tb_doctor WHERE tb_user_id IN(
    SELECT DISTINCT initiator_doc_id FROM his_outpatient
    WHERE create_date>=#{begin} AND create_date
    &lt;#{end}
    UNION
    SELECT DISTINCT receiver_doc_id FROM his_outpatient
    WHERE create_date>=#{begin} AND create_date
    &lt;#{end}
    ));
    </select>

    id="findTermialList"
    入参类型 java.lang.String.
    出参类型 java.lang.String.
    虽然我们查询到的结果集是一个List 但是出参类型仍然是
    java.lang.String.

    此处有坑
    create_date>=#{begin} AND create_date &lt;#{end}
    小于符号应该这样写 &lt;


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  • 原文地址:https://www.cnblogs.com/guagua-join-1/p/9597942.html
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