mysql分页_日期转换_模糊查询_if语句等常用语法

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mysql分页_日期转换_模糊查询_if语句等常用语法

这三种是sql语句中使用最广泛的，无需解释，直接抄代码就行

    <!-- 获取会员sum -->
    <select id="getUserSum"  resultType="string">
    	<![CDATA[
    		SELECT COUNT(T.USER_ID) 
    			FROM T_USER_INFO T
    	]]>
    	<where>
    		T.DELFLAG="0"
    		<if test="nickname != '' and nickname != null">
				AND T.NICKNAME LIKE  CONCAT('%',#{nickname},'%')
			</if>
			<if test="userPhone != '' and userPhone != null">
				AND T.USER_PHONE LIKE CONCAT('%',#{userPhone},'%')
			</if>
			<if test="regType != '' and regType != null">
				AND T.REG_TYPE = #{regType}
			</if>
    	</where>
    </select>
    
    <!-- 获取会员list -->
    <select id="getUserList"  resultMap="UserRVO">
				SELECT T.USER_ID as userId,
				       T.USER_NAME as userName,
				       T.NICKNAME as nickname,
				       T.USER_PHONE as userPhone,
				       T.QQ_ID as qqId,
				       T.UNION_ID as unionId,
				       T.HANDEL_IMG as handelImg,
				       T.USER_LEVAL as userLeval,
				       T.USER_SEX as userSex,
				       T.REG_TYPE as regType,
				       date_format(T.CREATETIME, '%Y-%m-%d %H:%i:%s') as createTime
				  FROM T_USER_INFO T
				  <where>
		    		T.DELFLAG="0"
		    		<if test="nickname != '' and nickname != null">
						AND T.NICKNAME LIKE CONCAT('%',#{nickname},'%')
					</if>
					<if test="userPhone != '' and userPhone != null">
						AND T.USER_PHONE LIKE CONCAT('%',#{userPhone},'%')
					</if>
					<if test="regType != '' and regType != null">
						AND T.REG_TYPE = #{regType}
					</if>
		    	</where>
		    	ORDER BY T.CREATETIME DESC
		    	LIMIT #{begin},#{count}
    </select>

附件PagesVO

	package com.car.trip.vo;

	/**
	 * 分页VO
	 */
	public class PagesVO {
		
		/** 当前页数 */
		private int pages;
		/** 查询数量 */
		private int count;
		/** 开始row数 */
		private int begin;
		
		public PagesVO() {
		}
		
		/**
		 * 计算开始与结束行数
		 * @param pages		当前页数
		 * @param count		查询数量
		 */
		public PagesVO(String pages, String count) {
			this.pages = Integer.parseInt(pages);
			this.count = Integer.parseInt(count);;
			this.getBeginEnd();
		}
		
		/**
		 * 返回 开始row数
		 * @param pages		当前页数
		 * @param count		查询数量
		 * @return
		 * @author czt
		 * @since 2017年12月21日 上午9:17:18
		 */
		public static String getBegin(String pages, String count) {
			return "" + new PagesVO(pages, count).getBegin();
		}

		/**
		 * 计算开始与结束行数
		 * @author czt
		 * @time 2015年5月21日 下午5:27:10
		 */
		public void getBeginEnd() {
			this.begin = (this.pages - 1) * this.count;
		}
		public int getBegin() {
			return begin;
		}
		public void setBegin(int begin) {
			this.begin = begin;
		}
		public int getPages() {
			return pages;
		}
		public void setPages(int pages) {
			this.pages = pages;
		}
		public int getCount() {
			return count;
		}
		public void setCount(int count) {
			this.count = count;
		}
	}