ajax struts2 给下拉框赋值

一、js代码

$(function(){$.ajax({     type:'post',     url:'${ctx}/dictionary/listChannel.do',     data:'',     dataType:'json',     success:function(json){       for(var i=0; i< json.length;i++){        $("#channel_id").append("<option value='"        +json[i].value_Id+"'>"         +json[i].value+"</option>");                }     },        error:function(){                alert('error');             }    });//选择渠道信息时候，加载版本信息 

$("#channel_id").change(function(){   var channel_id=$("#channel_id").val();   $("#version_id").empty();   if (""!= channel_id) {    //查询版本信息    $.ajax({     type:'post',     url:'${ctx}/dictionary/listVersion2.do',     data:'Id='+channel_id,     dataType:'json',     success:function(json){     if(null != json){      $("#version_id").append("<option value=''>---请选择---</option>");       for(var i=0; i< json.length;i++){        $("#version_id").append("<option value='"        +json[i].value_Id+"'>"         +json[i].value+"</option>");                }         }      },        error:function(){                alert('该渠道下没有版本信息');             }    });   }else{    $("#version_id").append("<option value=''>---请选择---</option>");   }  });  }); 

二、html页面关键代码 

<td align="left" height="18" bgcolor="#ecf6fa"><span class="STYLE8">渠道标识：</span><select  id="channel_id" name="packageBean.CHANNEL_ID"  class="selectstyle200"><option value="">---请选择---</option></select></td>     <td align="left" height="18" bgcolor="#ecf6fa">      <span class="STYLE8">版本标识：</span>      <select  id="version_id" name="packageBean.VERSION_ID" class="selectstyle200">       <option value="">---请选择---</option>      </select>     </td>

三、struts2 action中的方法package com.ecp.web.dictionary.action;import java.io.PrintWriter;import java.util.List;import javax.servlet.http.HttpServletResponse;import org.apache.struts2.ServletActionContext;import com.alibaba.fastjson.JSON;import com.ecp.web.dictionary.business.DictionaryManager;import com.hzdracomsoft.base.BaseAction;import com.hzdracomsoft.common.LogUtil;import com.hzdracomsoft.javabean.Dictionary;/*** * 获取字典表信息  * @author ZhuangZi * @version $Id: DictionaryAction.java,v 0.1 2013-1-29 上午10:55:53 ZhuangZi Exp $ */public class DictionaryAction extends BaseAction{    private static LogUtil log = LogUtil.getInstance(DictionaryAction.class);    private DictionaryManager dictionaryManager;    private Dictionary dictionary;    private List<Dictionary> listDictionary;    private String Id;    /***     * 获取渠道信息     *      */    public void listChannel(){        String json="";        try{            listDictionary = dictionaryManager.handleListChannel();            json=JSON.toJSONString(listDictionary);                        HttpServletResponse response=ServletActionContext.getResponse();                response.setContentType("text/html");               response.setCharacterEncoding("utf-8");             PrintWriter out;                out = response.getWriter();              out.println(json);             out.flush();                out.close();         }catch(Exception e){            log.error(e);        }    }    /***     * 获取版本信息     *      */    public void listVersion2(){        String json="";        try{            listDictionary=dictionaryManager.handleListVersion(Id);            json=JSON.toJSONString(listDictionary);                        HttpServletResponse response=ServletActionContext.getResponse();                response.setContentType("text/html");               response.setCharacterEncoding("utf-8");             PrintWriter out;                out = response.getWriter();              out.println(json);             out.flush();                out.close();         }catch(Exception e){            log.error(e);        }           }    /***     * 获取下载包表信息     * @return     */    public void listPackage(){        String json="";        try{            listDictionary=dictionaryManager.handleListPackage(Id);            json=JSON.toJSONString(listDictionary);                        HttpServletResponse response=ServletActionContext.getResponse();                response.setContentType("text/html");               response.setCharacterEncoding("utf-8");             PrintWriter out;                out = response.getWriter();              out.println(json);             out.flush();                out.close();         }catch(Exception e){            log.error(e);        }           }    public Dictionary getDictionary() {        return dictionary;    }    public void setDictionary(Dictionary dictionary) {        this.dictionary = dictionary;    }    public List<Dictionary> getListDictionary() {        return listDictionary;    }    public void setListDictionary(List<Dictionary> listDictionary) {        this.listDictionary = listDictionary;    }    public DictionaryManager getDictionaryManager() {        return dictionaryManager;    }    public void setDictionaryManager(DictionaryManager dictionaryManager) {        this.dictionaryManager = dictionaryManager;    }    public String getId() {        return Id;    }    public void setId(String id) {        Id = id;    }   } 

OK了，你就使劲顶贴吧 哈哈 给点发帖动力