Ajax 多级联动市县区（街道）基于Struts1.x与Strurts2.x实现

Ajax 多级联动（Struts1.x与Strurts2.x）以市为例子上代码：(如有问题可以加QQ:2250680083)

1、导入包json-lib-2.2.3-jdk15.jar，引入jQuery如果联网建议使用Google的，地址为：<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>

2、页面代码如下：var url="/" +lemis.WEB_APP_NAME + "/monitor/comEditShi.do";

//初始化市区

function inni_city(){

jQuery.ajax({

url : url,

data:{method: 'ajaxGetCity'},

type : "post",

async: false,

cache : false,

dataType : "json",

success:onchangecallback

});

function onchangecallback(data){

var str="<option value=''>请选择</option>" ;

for(var i=0;i<data.length;i++){

if(s8==(data[i].key)){

str+= "<option selected=true value='"+data[i].key+"'>"+data[i].value+ "</option>";//应对IE6的方法($("").val(值)会有问题)

}else{

str+= "<option value='"+data[i].key+"'>"+data[i].value+ "</option>";

}

$( "#所放位子ID").html(str);

}

3、配置action（自己配置）

4、Java代码

public class ComEditShi extends ActionLeafSupport {

     /***
     *获取市区
     **/
     public ActionForward ajaxGetCity(ActionMapping mapping, ActionForm actionForm,
               HttpServletRequest request, HttpServletResponse response) throws AppException, IOException{
          List<Param> zihanTypes =new ArrayList<Param>();
          AjaxData msg1 = new AjaxData();//自己的方法

AjaxData.java

public class AjaxData {
     /**
     * 省厅监测，获取市
     * @author 紫寒
     * @return
     */
     public LinkedHashMap getShi_st() {
          AjaxDataDAO rd = new AjaxDataDAO();
          try {
               return rd.getShi_st();//自己方法

public LinkedHashMap getShi_st() throws SQLException {
LinkedHashMap map = getData("ajax_shi",null);

//市县区紫寒
     private LinkedHashMap getData(String string,String string2){
          LinkedHashMap map = new LinkedHashMap();
          Sc01 aSc01 = new Sc01();
          Sc01 aSc01_ = new Sc01();
          aSc01.setFileKey(string);
          if(string2!=null){
               aSc01.setAab003(string2);
          }
          Connection con = null;
     try {
               con = DBUtil. getConnection();
               List<?> list = (List<?>) find(con, aSc01, null, 0);
               for (int i = 0; i < list.size(); i++) {
                    ClassHelper.copyProperties(list.get(i), aSc01_);
                    map.put(aSc01_.getAab003(), aSc01_.getAab300());//主要的一步
               }

          } catch (NoConnectionException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (AppException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          }
            return map;

     }

return map;
}

          } catch (SQLException e) {
               e.printStackTrace();
          }
          return null;
     }
}

          LinkedHashMap mapaab061 = msg1.getShi_st();
          Set<Map.Entry<String, String>> entryseSet=mapaab061.entrySet();
          for (Map.Entry<String, String> entry:entryseSet) {
               Param param = new Param();

Param.java

public class Param {
    private Object entity; //预留
    private String value;
    private String key;

    public Param() {
    }
    public Param(String value, String key) {
        this.value = value;
        this.key = key;
    }
    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }


    public String getkey() {
        return key;
    }


    public void setkey(String key) {
        this.key = key;
    }


    public Object getEntity() {
        return entity;
    }


    public void setEntity(Object entity) {
        this.entity = entity;
    }

}

               param.setkey(entry.getKey());
               param.setValue(entry.getValue());
               zihanTypes.add(param);
               }
          JSONArray jsonObj = JSONArray.fromObject(zihanTypes);
          sendMsg(jsonObj.toString(),response); //Structs1.x

// sendMsg(jsonObj.toString()); //Structs2.x

Structs1.x	Structs2.x
private void sendMsg(String string, HttpServletResponse response) { // TODO Auto-generated method stub response.setCharacterEncoding("UTF-8"); try { response.getWriter().write(string); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }	private void sendMsg(String string) { HttpServletResponse response = ServletActionContext.getResponse(); response.setCharacterEncoding("UTF-8"); response.getWriter().write(string); }

return null;
}

}

5、相应的级联方法用jQuery的onchange事件就OK了！

6、祝技术分享愉快！