http://www.cnblogs.com/whgw/archive/2012/05/11/2496667.html
Jquery的select操作集合
jQuery获取Select选择的Text和Value: 语法解释:
1. $("#select_id").change(function(){//code...});//为Select添加事件,当选择其中一项时触发 2. var checkText=$("#select_id").find("option:selected").text(); //获取Select选择的Text 3. var checkValue=$("#select_id").val(); //获取Select选择的Value 4. var checkIndex=$("#select_id ").get(0).selectedIndex; //获取Select选择的索引值5. var maxIndex=$("#select_id option:last").attr("index"); //获取Select最大的索引值
jQuery设置Select选择的Text和Value: 语法解释:
1. $("#select_id ").get(0).selectedIndex=1; //设置Select索引值为1的项选中 2. $("#select_id ").val(4); //设置Select的Value值为4的项选中 3. $("#select_id option[text='jQuery']").attr("selected", true); //设置Select的Text值为jQuery的项选中jQuery添加/删除Select的Option项: 语法解释:
1. $("#select_id").append("<option value='Value'>Text</option>"); //为Select追加一个Option(下拉项) 2. $("#select_id").prepend("<option value='0'>请选择</option>"); //为Select插入一个Option(第一个位置) 3. $("#select_id option:last").remove(); //删除Select中索引值最大Option(最后一个) 4. $("#select_id option[index='0']").remove(); //删除Select中索引值为0的Option(第一个) 5. $("#select_id option[value='3']").remove(); //删除Select中Value='3'的Option 6. $("#select_id option[text='4']").remove(); //删除Select中Text='4'的Option下面是一个省市二级联动实现源代码:
1、/WEB-INF/lib/下导入
struts2-json-plugin-2.1.8.jar
2.jsp文件代码片段
<%@ page pageEncoding="utf-8"%>
3.js代码
function createCities(){var province2=$('#s1').val(); $.ajax({ url:'createCities.action', type:'post', dataType:'json', data:{province:province2}, success:createCities2 });}function createCities2(json){var city2=json.city;var cities=city2.split(",");var s_root=document.getElementById('s2'); s_root.options.length=0; $('#s2').append("");for(i=0;i"+city+""); }}
4.Action代码
import com.xzmy.dao.AreanoDAO;import com.xzmy.dao.impl.AreanoDAOImpl;publicclass CreateCitys {private String province;private String city;public String execute(){ AreanoDAO areanoDao=new AreanoDAOImpl();try { city=areanoDao.findByProvince(province);return "success"; } catch (Exception e) { e.printStackTrace();return "error"; } }public String getProvince() {return province; }publicvoid setProvince(String province) {this.province = province; }public String getCity() {return city; }publicvoid setCity(String city) {this.city = city; }}