1 JSP部分代码  2   3    4   5 <script src="/js/jquery-1.2.6.min.js" type="text/javascript"></script>  6 <script>  7  //为了避免jquery中的'$'与其它的'$'冲突,在此将jquery中的'$'重命名为'jQuery'  8  var jQuery=$;  9 </script> 10  11  12   13  14 <script> 15  16  17   //初始化数据 18   jQuery(document).ready(function(){ 19   20    getProvince(); 21  22  }); 23   24  25   26    27   //取所有省份 28   function getProvince(){ 29  30    //&callback=?"注意这个是为了解决跨域访问的问题    31    var url ="http://www.yimei.com/shopcar/getAreaJSON?areaId=0&callback=?"; 32     33    jQuery.getJSON(url,null,function call(result){    34          setProvince(result);  35      }); 36     37    //显示或隐藏激活卡 38    jQuery("#actionCardChk").click(function(){ 39     if(jQuery("#actionCardChk").attr("checked")==true){ 40      jQuery("#actionCardDiv").show(); 41     }else{ 42      jQuery("#actionCardDiv").hide(); 43     } 44    }); 45     46    //显示或隐藏新增常用地址 47    jQuery("#addressChk").click(function(){ 48     if(jQuery("#addressChk").attr("checked")==true){ 49      jQuery("#addressDiv").show(); 50     }else{ 51      jQuery("#addressDiv").hide(); 52     } 53    }); 54     55     56   } 57    58    59    60    61   //设置省份 62   function setProvince(result){ 63    64   var province = document.getElementById("toProvince"); 65    66   jQuery.each(result.data, function(i, area){ 67          var value = area.id; 68     var text = area.name; 69     var option = new Option(text,value); 70     province.options.add(option); 71            72     });   73    74   } 75    76    77   //按上级ID取子地区 78   function getArea(name){ 79     80    if( name=='city' ){ 81     clearSel(document.getElementById("toCity")); //清空城市 82     var province = document.getElementById("toProvince"); 83     if(province.options[province.selectedIndex].value == "") return; 84     var areaId = province.options[province.selectedIndex].value; 85      86     var url ="http://www.yimei.com/shopcar/getAreaJSON?areaId="+areaId+"&callback=?"; 87     jQuery.getJSON(url,null,function call(result){    88           setCity(result);  89       }); 90       91    }else if( name=='county'){ 92     clearSel(document.getElementById("toCounty")); //清空城区 93     var city = document.getElementById("toCity"); 94     if(city.options[city.selectedIndex].value == "") return; 95     var areaId = city.options[city.selectedIndex].value; 96      97     var url ="http://www.yimei.com/shopcar/getAreaJSON?areaId="+areaId+"&callback=?"; 98     jQuery.getJSON(url,null,function call(result){    99           setCounty(result); 100       });101       102    }103   }104   105   //当改变省份时设置城市106   function setCity(result){107   108   var city = document.getElementById("toCity");109   110   jQuery.each(result.data, function(i, area){111          var value = area.id;112     var text = area.name;113     var option = new Option(text,value);114     city.options.add(option);115     });  116     117   }118   119   120   //当改变省份时设置城市121   function setCounty(result){122  123   var county = document.getElementById("toCounty");124   125   jQuery.each(result.data, function(i, area){126          var value = area.id;127     var text = area.name;128     var option = new Option(text,value);129     county.options.add(option);130     });  131    132   }133   134   // 清空下拉列表135   function clearSel(oSelect){136      137   while(oSelect.childNodes.length>0){138    oSelect.removeChild(oSelect.childNodes[0]);139   }140          141   }142 143  144 145 </script>146 147  148 149   <tr>150   <td height="28" colspan="3"> 151    <select name="toProvince" id="toProvince" onChange="getArea('city')" class="STYLE5" onFocus="doOnFocus(this);">152     <option value="" selected>请选择省份...</option>153    </select>         154   </td> 155          </tr>156 157          <tr>158   <td height="28" colspan="3">               159    <select name="toCity" id="toCity" class="board" onChange="getArea('county')" onFocus="doOnFocus(this);">160     <option value="">请选择城市...</option>161    </select>        162   </td>163                 164          </tr>165          166          <tr>167   <td class="STYLE3">168    <select name="toCounty" id="toCounty" class="board"  οnfοcus="doOnFocus(this);">169     <option value="">请选择城区...</option>170    </select>        171   </td>172  </tr>173 174  175 176  177 178 JAVA部分代码 Servlet179 180  181 182  response.setContentType("text/xml;charset=utf-8");183   response.setHeader("Pragma","No-cache");184   response.setDateHeader("Expires",0);185   response.setHeader("Cache-Control","no-cache");    186   PrintWriter out=response.getWriter();187 188   String areaId = request.getParameter("areaId");189   190   if(areaId==null || areaId.trim().length()<=0){191    //sb.append("<data><error>系统错误地区id为空</error></data>");192    //out.print(sb.toString());193    return;194   }  195   196 197   //注意这个是为了解决跨域访问的问题198   String callback = request.getParameter("callback");   199   200   try {201 202    List areaList = AreaService.getInstance().getAreasByParentId(Integer.parseInt(areaId));203 204    // 取集合205    JSONArray jsonArray = JSONArray.fromObject(areaList);206 207    JSONObject jsobjcet = new JSONObject();208 209    jsobjcet.put("data", jsonArray);210    211    response.getWriter().write(callback+"("+jsobjcet.toString()+");");212 213    log.info(callback+"("+jsobjcet.toString()+");");214    215    216   } catch (IOException e) {217    e.printStackTrace();218   }219      220 221  222 223 DAO部分代码224 225 public List getAreasByParentId(int parentId) {226   Connection conn=null;227   Statement stm=null;228   ResultSet rs=null;229   List<AreaInfo> list = new ArrayList<AreaInfo>();230   try{231    conn = ConnectionPool.getConnection();232    if( conn == null ) throw new Exception("DataBase connection error");233    stm = conn.createStatement();234    String sql ="select * from n_area where parent_id =" + parentId;235    rs = stm.executeQuery(sql);236    AreaInfo areaInfo = null;237    while( rs.next() ) {238     areaInfo= new AreaInfo();239     areaInfo.setId(rs.getInt("id"));240     areaInfo.setName(rs.getString("name"));241     areaInfo.setParentId(rs.getInt("parent_id"));242     list.add(areaInfo);243    }244   }catch(Exception e){245    log.error("getAreasByParentId() error:"+e.getMessage());246   }finally{247    ConnectionPool.release(conn,stm,rs); //释放资源248   }249   return list;250  }251 252  253 254  255 256 数据表结构257 258 CREATE TABLE `n_area` (259   `id` int(11) NOT NULL auto_increment,260   `name` varchar(20) default NULL,261   `parent_id` int(11) NOT NULL default '0',262   PRIMARY KEY  (`id`)263 ) ENGINE=MyISAM AUTO_INCREMENT=224 DEFAULT CHARSET=gbk;264 265 记录266 267  268 269 INSERT INTO `n_area` VALUES ('1', '广东省', '0');270 INSERT INTO `n_area` VALUES ('2', '北京', '0');271 INSERT INTO `n_area` VALUES ('3', '深圳市', '1');272 INSERT INTO `n_area` VALUES ('4', '广州市', '1');273 INSERT INTO `n_area` VALUES ('5', '北京五环以内', '2');274 INSERT INTO `n_area` VALUES ('6', '天津', '0');275 INSERT INTO `n_area` VALUES ('7', '天津市', '6');276 INSERT INTO `n_area` VALUES ('14', '珠海市', '1');277 INSERT INTO `n_area` VALUES ('15', '汕头市', '1');278 INSERT INTO `n_area` VALUES ('16', '佛山市', '1');279 INSERT INTO `n_area` VALUES ('17', '东莞市', '1');280 INSERT INTO `n_area` VALUES ('22', '肇庆市', '1');281 INSERT INTO `n_area` VALUES ('23', '惠州市', '1');282 INSERT INTO `n_area` VALUES ('24', '清远市', '1');283 INSERT INTO `n_area` VALUES ('25', '韶关市', '1');284 INSERT INTO `n_area` VALUES ('26', '湛江市', '1');285 INSERT INTO `n_area` VALUES ('27', '潮州市', '1');286 INSERT INTO `n_area` VALUES ('28', '梅州市', '1');287 INSERT INTO `n_area` VALUES ('29', '茂名市', '1');288 INSERT INTO `n_area` VALUES ('30', '浙江省', '0');289 INSERT INTO `n_area` VALUES ('31', '江苏省', '0');290 INSERT INTO `n_area` VALUES ('32', '福建省', '0');291 INSERT INTO `n_area` VALUES ('33', '广西省', '0');292 INSERT INTO `n_area` VALUES ('34', '江西省', '0');293 INSERT INTO `n_area` VALUES ('35', '山东省', '0');294 INSERT INTO `n_area` VALUES ('36', '湖南省', '0');295 INSERT INTO `n_area` VALUES ('37', '安徽省', '0');296 INSERT INTO `n_area` VALUES ('38', '贵州省', '0');297 INSERT INTO `n_area` VALUES ('39', '黑龙江省', '0');298 INSERT INTO `n_area` VALUES ('40', '辽宁省', '0');299 INSERT INTO `n_area` VALUES ('41', '四川省', '0');300 INSERT INTO `n_area` VALUES ('42', '湖北省', '0');301 INSERT INTO `n_area` VALUES ('43', '陕西省', '0');302 INSERT INTO `n_area` VALUES ('44', '河南省', '0');303 INSERT INTO `n_area` VALUES ('45', '山西省', '0');304 INSERT INTO `n_area` VALUES ('46', '海南省', '0');305 INSERT INTO `n_area` VALUES ('47', '杭州市', '30');306 INSERT INTO `n_area` VALUES ('48', '温州市', '30');307 INSERT INTO `n_area` VALUES ('49', '宁波市', '30');308 INSERT INTO `n_area` VALUES ('50', '台州市', '30');309 INSERT INTO `n_area` VALUES ('51', '南京市', '31');310 INSERT INTO `n_area` VALUES ('52', '无锡市', '31');311 INSERT INTO `n_area` VALUES ('53', '苏州市', '31');312 INSERT INTO `n_area` VALUES ('54', '常州市', '31');313 INSERT INTO `n_area` VALUES ('55', '徐州市', '31');314 INSERT INTO `n_area` VALUES ('56', '福州市', '32');315 INSERT INTO `n_area` VALUES ('57', '厦门市', '32');316 INSERT INTO `n_area` VALUES ('58', '泉州市', '32');317 INSERT INTO `n_area` VALUES ('59', '漳州市', '32');318 INSERT INTO `n_area` VALUES ('60', '南宁市', '33');319 INSERT INTO `n_area` VALUES ('61', '桂林市', '33');320 INSERT INTO `n_area` VALUES ('62', '柳州市', '33');321 INSERT INTO `n_area` VALUES ('63', '百色市', '33');322 INSERT INTO `n_area` VALUES ('64', '南昌市', '34');323 INSERT INTO `n_area` VALUES ('65', '赣州市', '34');324 INSERT INTO `n_area` VALUES ('66', '济南市', '35');325 INSERT INTO `n_area` VALUES ('67', '青岛市', '35');326 INSERT INTO `n_area` VALUES ('68', '长沙市', '36');327 INSERT INTO `n_area` VALUES ('69', '合肥市', '37');328 INSERT INTO `n_area` VALUES ('70', '贵阳市', '38');329 INSERT INTO `n_area` VALUES ('71', '哈尔滨市', '39');330 INSERT INTO `n_area` VALUES ('72', '大连市', '40');331 INSERT INTO `n_area` VALUES ('73', '成都市', '41');332 INSERT INTO `n_area` VALUES ('74', '武汉市', '42');333 INSERT INTO `n_area` VALUES ('75', '西安市', '43');334 INSERT INTO `n_area` VALUES ('76', '郑州市', '44');335 INSERT INTO `n_area` VALUES ('77', '太原市', '45');336 INSERT INTO `n_area` VALUES ('78', '海口市', '46');337 INSERT INTO `n_area` VALUES ('79', '中山市', '1');338 INSERT INTO `n_area` VALUES ('80', '顺德市', '1');339 INSERT INTO `n_area` VALUES ('81', '江门市', '1');340 INSERT INTO `n_area` VALUES ('82', '云浮市', '1');341 INSERT INTO `n_area` VALUES ('83', '阳江市', '1');342 INSERT INTO `n_area` VALUES ('84', '揭阳市', '1');343 INSERT INTO `n_area` VALUES ('85', '河源市', '1');344 INSERT INTO `n_area` VALUES ('86', '重庆', '0');345 INSERT INTO `n_area` VALUES ('87', '重庆市区', '86');346 INSERT INTO `n_area` VALUES ('88', '上海', '0');347 INSERT INTO `n_area` VALUES ('89', '上海市', '88');348 INSERT INTO `n_area` VALUES ('91', '北京五环以外', '2');349 INSERT INTO `n_area` VALUES ('93', '重庆郊区', '86');350 INSERT INTO `n_area` VALUES ('94', '河北省', '0');351 INSERT INTO `n_area` VALUES ('95', '石家庄市', '94');352 INSERT INTO `n_area` VALUES ('96', '保定市', '94');353 INSERT INTO `n_area` VALUES ('97', '邯郸市', '94');354 INSERT INTO `n_area` VALUES ('98', '张家口市', '94');355 INSERT INTO `n_area` VALUES ('99', '秦皇岛市', '94');356 INSERT INTO `n_area` VALUES ('100', '邢台市', '94');357 INSERT INTO `n_area` VALUES ('101', '唐山市', '94');358 INSERT INTO `n_area` VALUES ('102', '承德市', '94');359 INSERT INTO `n_area` VALUES ('103', '镇江市', '31');360 INSERT INTO `n_area` VALUES ('104', '绍兴市', '30');361 INSERT INTO `n_area` VALUES ('105', '嘉兴市', '30');362 INSERT INTO `n_area` VALUES ('106', '南通市', '31');363 INSERT INTO `n_area` VALUES ('107', '扬州市', '31');364 INSERT INTO `n_area` VALUES ('108', '连云港市', '31');365 INSERT INTO `n_area` VALUES ('109', '北海市', '33');366 INSERT INTO `n_area` VALUES ('110', '九江市', '34');367 INSERT INTO `n_area` VALUES ('111', '景德镇市', '34');368 INSERT INTO `n_area` VALUES ('112', '淄博市', '35');369 INSERT INTO `n_area` VALUES ('113', '烟台市', '35');370 INSERT INTO `n_area` VALUES ('114', '潍坊市', '35');371 INSERT INTO `n_area` VALUES ('115', '威海市', '35');372 INSERT INTO `n_area` VALUES ('116', '岳阳市', '36');373 INSERT INTO `n_area` VALUES ('117', '湘潭市', '36');374 INSERT INTO `n_area` VALUES ('118', '株洲市', '36');375 INSERT INTO `n_area` VALUES ('119', '衡阳市', '36');376 INSERT INTO `n_area` VALUES ('120', '常德市', '36');377 INSERT INTO `n_area` VALUES ('121', '滁州市', '37');378 INSERT INTO `n_area` VALUES ('123', '安庆市', '37');379 INSERT INTO `n_area` VALUES ('124', '遵义市', '38');380 INSERT INTO `n_area` VALUES ('125', '安顺市', '38');381 INSERT INTO `n_area` VALUES ('126', '六盘水市', '38');382 INSERT INTO `n_area` VALUES ('127', '沈阳市', '40');383 INSERT INTO `n_area` VALUES ('128', '鞍山市', '40');384 INSERT INTO `n_area` VALUES ('129', '攀枝花市', '41');385 INSERT INTO `n_area` VALUES ('130', '南充市', '41');386 INSERT INTO `n_area` VALUES ('131', '襄樊市', '42');387 INSERT INTO `n_area` VALUES ('132', '黄石市', '42');388 INSERT INTO `n_area` VALUES ('133', '汉中市', '43');389 INSERT INTO `n_area` VALUES ('134', '洛阳市', '44');390 INSERT INTO `n_area` VALUES ('135', '开封市', '44');391 INSERT INTO `n_area` VALUES ('136', '云南省', '0');392 INSERT INTO `n_area` VALUES ('137', '昆明市', '136');393 INSERT INTO `n_area` VALUES ('138', '丽江市', '136');394 INSERT INTO `n_area` VALUES ('139', '蚌埠市', '37');395 INSERT INTO `n_area` VALUES ('140', '南山区', '3');396 INSERT INTO `n_area` VALUES ('141', '其它区', '3');397 INSERT INTO `n_area` VALUES ('143', '市北区', '67');398 INSERT INTO `n_area` VALUES ('213', '西藏', '0');399 INSERT INTO `n_area` VALUES ('178', '甘肃省', '0');400 INSERT INTO `n_area` VALUES ('179', '兰州市', '178');401 INSERT INTO `n_area` VALUES ('180', '内蒙古', '0');402 INSERT INTO `n_area` VALUES ('181', '呼和浩特', '180');403 INSERT INTO `n_area` VALUES ('182', '吉林省', '0');404 INSERT INTO `n_area` VALUES ('183', '新疆省', '0');405 INSERT INTO `n_area` VALUES ('184', '新疆', '183');406 INSERT INTO `n_area` VALUES ('185', '吉林市', '182');407 INSERT INTO `n_area` VALUES ('215', '其他地区', '213');408 INSERT INTO `n_area` VALUES ('187', '其他地区', '1');409 INSERT INTO `n_area` VALUES ('188', '其他地区', '30');410 INSERT INTO `n_area` VALUES ('189', '其他地区', '31');411 INSERT INTO `n_area` VALUES ('190', '其他地区', '32');412 INSERT INTO `n_area` VALUES ('191', '其他地区', '33');413 INSERT INTO `n_area` VALUES ('192', '其他地区', '34');414 INSERT INTO `n_area` VALUES ('193', '其他地区', '35');415 INSERT INTO `n_area` VALUES ('194', '其他地区', '36');416 INSERT INTO `n_area` VALUES ('195', '其他地区', '37');417 INSERT INTO `n_area` VALUES ('196', '其他地区', '38');418 INSERT INTO `n_area` VALUES ('197', '其他地区', '39');419 INSERT INTO `n_area` VALUES ('198', '其他地区', '40');420 INSERT INTO `n_area` VALUES ('199', '其他地区', '41');421 INSERT INTO `n_area` VALUES ('200', '其他地区', '42');422 INSERT INTO `n_area` VALUES ('201', '其他地区', '43');423 INSERT INTO `n_area` VALUES ('202', '其他地区', '44');424 INSERT INTO `n_area` VALUES ('203', '其他地区', '94');425 INSERT INTO `n_area` VALUES ('204', '其他地区', '136');426 INSERT INTO `n_area` VALUES ('205', '其他地区', '178');427 INSERT INTO `n_area` VALUES ('206', '其他地区', '180');428 INSERT INTO `n_area` VALUES ('207', '其他地区', '182');429 INSERT INTO `n_area` VALUES ('214', '拉萨', '213');430 INSERT INTO `n_area` VALUES ('210', '其他地区', '45');431 INSERT INTO `n_area` VALUES ('211', '其他地区', '46');432 INSERT INTO `n_area` VALUES ('212', '其他地区', '86');433 INSERT INTO `n_area` VALUES ('220', '新三区', '184');434 INSERT INTO `n_area` VALUES ('219', '新二区', '184');435 INSERT INTO `n_area` VALUES ('221', '天河区', '4');436 INSERT INTO `n_area` VALUES ('222', '越秀区', '4');437 INSERT INTO `n_area` VALUES ('223', '海珠区', '4');438 439  440 441  442 443 附件中有相应的jar包444 445 json-lib-2.1-jdk15.jar 是主要的