Java框架SSH结合Easyui控件实现省市县三级联动示例解析

     <tr>                                      <td class="left">省:</td>         <td><input name="contact.province" id="province" style="width: 174px;" ></td>            <td class="left">市:</td>                 <td><input  name="contact.city" id="city" style="width: 174px;"></td>                              <td class="left">县区:</td>         <td><input name="contact.county" id="county" style="width: 174px;" ></td>    </tr>

$(function(){  // 下拉框选择控件，下拉框的内容是动态查询数据库信息 $('#province').combobox({     url:'apply/provinceCombobox_combobox.action',    editable:false, //不可编辑状态    cache: false,   // panelHeight: 'auto',//自动高度适合    valueField:'code',      textField:'note',     onHidePanel: function(){   $("#city").combobox("setValue",'');   $("#county").combobox("setValue",'');   $("#cregicounty").val('');  var province = $('#province').combobox('getValue');   if(province!=''){  $.ajax({  type: "POST",  url: "apply/cityCombobox_combobox.action?province="+province,  cache: false,  dataType : "json",  success: function(data){  $("#city").combobox("loadData",data);                 }                });               }           }          });   $('#city').combobox({    editable:false, //不可编辑状态   cache: false,   //panelHeight: 'auto',//自动高度适合   valueField:'code',     textField:'note',   onHidePanel: function(){   $("#cregicounty").val('');   $("#county").combobox("setValue",'');  var city = $('#city').combobox('getValue');   if(city!=''){  $.ajax({  type: "POST",  url: "apply/countyCombobox_combobox.action?city="+city,  cache: false,  dataType : "json",  success: function(data){  $("#county").combobox("loadData",data);                 }                });               }           }  });  $('#county').combobox({    editable:false, //不可编辑状态   cache: false,  // panelHeight: 'auto',//自动高度适合   valueField:'code',     textField:'note',   onHidePanel: function(){     var str=$('#county').combobox('getText');   $("#cregicounty").val(str);            } });    $('#country').combobox({//国家代码初始化  valueField:'english',     textField:'note',   url:'json/country.json',   cache: false,  //panelHeight: 'auto',//自动高度适合   onChange: function(newValue,oldValue){    countrySearch(newValue);   countrys(newValue);   } });}); 

//查询全国行政区代码省 public String provinceCombobox() throws Exception{  List list=comboboxService.findProvince(); this.jsonUtil(list); return null; }  //查询全国行政区代码市 public String cityCombobox() throws Exception{   List list=comboboxService.findCity(province); this.jsonUtil(list);   return null; }  //查询全国行政区代码县区 public String countyCombobox() throws Exception{  List list=comboboxService.findCounty(city); this.jsonUtil(list);   return null; }   //调用json工具方法，传入参数alist public void jsonUtil(Object accountlist) throws Exception{  HttpServletResponse response = ServletActionContext.getResponse();   log.info("JSON格式：" + accountlist.toString());    String returnJson = JsonConvert.returnJson(accountlist);  response.setCharacterEncoding("utf-8");  response.getWriter().println(returnJson); }

import java.io.StringWriter;import org.codehaus.jackson.map.ObjectMapper;public class JsonConvert { static String jsonStr; public static String returnJson(Object object) throws Exception{ ObjectMapper objectMapper = new ObjectMapper(); StringWriter stringWriter = new StringWriter(); objectMapper.writeValue(stringWriter, object);  jsonStr = stringWriter.toString(); return jsonStr; }}

//查询省public List findProvince() throws Exception;//查询市public List findCity(String code) throws Exception;//查询县区public List findCounty(String code) throws Exception;

 //下拉框--查询省 public List findProvince() { log.info("===下拉框--查询省"); Criteria criteria=this.sessionFactory.getCurrentSession().createCriteria(CareacodeTblQg.class); criteria.add(Restrictions.like("code", "%0000")); criteria.addOrder(Order.asc("code"));  return criteria.list(); }  //下拉框--查询市 public List findCity(String code2) { log.info("===下拉框--查询市"); String id=code2.substring(0,2); Criteria criteria=this.sessionFactory.getCurrentSession().createCriteria(CareacodeTblQg.class); criteria.add(Restrictions.like("code", id+"%00")); criteria.add(Restrictions.ne("code",code2 )); criteria.addOrder(Order.asc("code"));  return criteria.list(); }  //下拉框--查询县区 public List findCounty(String code3) { log.info("===下拉框--查询县区"); String id=code3.substring(0,4); Criteria criteria=this.sessionFactory.getCurrentSession().createCriteria(CareacodeTblQg.class);   criteria.add(Restrictions.like("code", id+"%")); criteria.add(Restrictions.not(Restrictions.like("code", "%01"))); criteria.add(Restrictions.ne("code",code3 )); criteria.addOrder(Order.asc("code"));  return criteria.list(); }