根据字段查询数据库中的数据

<select id="findByPage" resultType="com.huarui.mapping.entity.ZdzEntity" parameterType="com.huarui.common.entity.web.Req">
   SELECT project_id,  project_name,  start_time,  end_time,  user_id,customer_id,status,create_time FROM OA_PM_PROJECT
       <where>
      <if test="parameterMap.project_name != null">
         AND project_name LIKE CONCAT(CONCAT('%', #{parameterMap.project_name}), '%')
      </if>
      <if test="parameterMap.user_id != null">
         AND user_id LIKE CONCAT(CONCAT('%', #{parameterMap.user_id}), '%')
      </if>
      <if test="parameterMap.status != null">
         AND status LIKE CONCAT(CONCAT('%', #{parameterMap.status}), '%')
      </if>

<if test="parameterMap.status != null">
   AND a.status LIKE CONCAT(CONCAT('%', #{parameterMap.status}), '%')
</if>

</where> </select>

通过数据库的字段名称等检索需要的的数据库信息

<!-- 查询区 -->
<div id="queryArea" class="ibox-content m-b-sm border-bottom">
   <div class="row">
      <div class="col-sm-9">
         <div class="form-group">
            <label class="control-label" for="project_name">项目名称</label>
            <div class="col-sm-3">
               <input type="text" id="project_name" name="project_name" value="" placeholder="" class="form-control">
            </div>
            <label class="control-label" for="user_id">负责人</label>
            <div class="col-sm-3">
               <input type="text" id="user_id" name="user_id" value="" placeholder="" class="form-control">
            </div>
            <label class="control-label" for="status">状态</label>
                  <div class="col-sm-3">
                     <div class="form-group">
                     <select name="organ" id="organ" class="form-control">
                        <option value="" selected>筹备中</option>
                        <option value="">进行中</option>
                        <option value="">已暂停</option>
                        <option value="">已结束</option>

                     </select>
                  </div>
               </div>
            </div>
         </div>
      </div>
   </div>

<button id="searchButton"
   class="ladda-button ladda-button-demo btn btn-success "
   type="button" data-style="zoom-in">
   <i class="fa fa-search"></i> <span class="bold">查&nbsp;询&nbsp;</span>
</button>