<select> <optgroup label="Alaskan/Hawaiian Time Zone"> <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option> <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option> </optgroup> <optgroup label="Pacific Time Zone"> <option value="CA" disabled="disabled" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option> <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option> <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option> <option value="WA" disabled="disabled" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option> </optgroup> <optgroup label="Mountain Time Zone"> <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option> <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option> <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option> <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option> <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option> <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option> <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option> <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option> <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option> </optgroup> <optgroup label="Central Time Zone"> <option value="AL">Alabama</option> <option value="AR">Arkansas</option> <option value="IL">Illinois</option> <option value="IA">Iowa</option> <option value="KS">Kansas</option> <option value="KY">Kentucky</option> <option value="LA">Louisiana</option> <option value="MN">Minnesota</option> <option value="MS">Mississippi</option> <option value="MO">Missouri</option> <option value="OK">Oklahoma</option> <option value="SD">South Dakota</option> <option value="TX">Texas</option> <option value="TN">Tennessee</option> <option value="WI">Wisconsin</option> </optgroup> <optgroup label="Eastern Time Zone"> <option value="CT">Connecticut</option> <option value="DE">Delaware</option> <option value="FL">Florida</option> <option value="GA">Georgia</option> <option value="IN">Indiana</option> <option value="ME">Maine</option> <option value="MD">Maryland</option> <option value="MA">Massachusetts</option> <option value="MI">Michigan</option> <option value="NH">New Hampshire</option> <option value="NJ">New Jersey</option> <option value="NY">New York</option> <option value="NC">North Carolina</option> <option value="OH">Ohio</option> <option value="PA">Pennsylvania</option> <option value="RI">Rhode Island</option> <option value="SC">South Carolina</option> <option value="VT">Vermont</option> <option value="VA">Virginia</option> <option value="WV">West Virginia</option> </optgroup> </select> <br/> ====================================== <br/>
7、搜索动态加载下拉选项功能（即在用户输入搜索内容时动态去后台取数据）
<article> <select multiple="multiple"> </select> </article> <br/> ========================================= <button>获取选中的值</button>
控制器action代码：