<link rel="stylesheet" type="text/css" href="<%=path %>/css/jquery_easyui/themes/default/easyui.css">
 <link rel="stylesheet" type="text/css" href="<%=path %>/css/jquery_easyui/themes/icon.css">
 <script type="text/javascript" src="<%=path %>/js/jquery_easyui/jquery-1.4.4.min.js"></script>
 <script type="text/javascript" src="<%=path %>/js/jquery_easyui/jquery.easyui.min.js"></script>

添加script

<script>
   $(function(){
   $('#tt2').tree({
    checkbox: false,
    url: '<%=path%>/formconfig/loadWfNodes.do',
    onBeforeExpand: function(node){
     $('#tt2').tree('options').url = '<%=path%>/formconfig/loadWfNodes.do?wfId='+node.id;
    }
   });
  });
 </script>

在body中加入

<body> 
  <ul id="tt2">
  <li state="closed" id='0'><span>流程列表</span></li>
  </ul>
 </body>

后臺拼接json數(shù)據(jù)

package com.aegon_cnooc.oa.formconfig.action;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.aegon_cnooc.framework.base.action.BaseAction;
import com.aegon_cnooc.oa.formconfig.service.FormConfigService;
import com.aegon_cnooc.oa.ibatis.to.TuOafWfTO;
import com.aegon_cnooc.oa.ibatis.to.TuOafWfnodesTO;
import com.aegon_cnooc.util.StringUtil;
/**
 * 加載流程下的節(jié)點的名稱
 * @Author: liuxinghui
 * @Date: 2011-9-8
 * @Version: 2.0
 * @Despcrition:
 */
public class LoadWfNodesAction extends BaseAction{
 private FormConfigService formConfigService;
 public ActionForward executeAction(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response)
   throws Exception {
  String wfId=request.getParameter("wfId");
  String jsonstr = "[";
  if(StringUtil.isNotEmpty(wfId)&&"0".equals(wfId)){
   List wfList=formConfigService.findWf();
   for(int i=0;i<wfList.size();i++){
    TuOafWfTO wfTo=(TuOafWfTO)wfList.get(i);
   jsonstr=jsonstr+
    "{\n" +
    "  \"id\":"+wfTo.getWfid()+",\n" + 
    "  \"text\":\"<a href='javaScript:void(0)' target='mainFrame'>"+wfTo.getWfname()+"</a>\",\n" +  
    "  \"state\":\"closed\"\n" + 
    " },";
   }
   int end=jsonstr.length()-1;//去掉最后一個逗號
   String json=jsonstr.substring(0,end);
   json=json+"]";
  response.setContentType("application/json;charset=gbk");
  response.setCharacterEncoding("gbk");
  PrintWriter pw = response.getWriter();
  pw.write(json);
  pw.flush();
  }else{
  List wfNodes=formConfigService.findWfNodesById(wfId);
   for(int i=0;i<wfNodes.size();i++){
    TuOafWfnodesTO wfNodesTo=(TuOafWfnodesTO)wfNodes.get(i);
   jsonstr=jsonstr+
    "{\n" +
    "  \"id\":"+wfNodesTo.getNodeid()+",\n" + 
    "  \"text\":\"<a href='" + request.getContextPath()+
    "/formconfig/loadGroupByWfIdAndNodeId.do?wfId="+wfId+"&nodeId="+wfNodesTo.getNodeid()+"' target='mainFrame'>"+wfNodesTo.getGenstepname()+"("+wfNodesTo.getNodeid()+")</a>\",\n" +  
    "  \"state\":\"closed\"\n" + 
    " },";
   }
   int end=jsonstr.length()-1;//去掉最后一個逗號
   String json=jsonstr.substring(0,end);
   json=json+"]";
  response.setContentType("application/json;charset=gbk");
  response.setCharacterEncoding("gbk");
  PrintWriter pw = response.getWriter();
  pw.write(json);
  pw.flush();
  }
  return null;
 }
 public void setFormConfigService(FormConfigService formConfigService) {
  this.formConfigService = formConfigService;
 }
}

下面一段代碼是EasyUI Jquery 動態(tài)加載樹，點擊節(jié)點加載

<script type="text/javascript"> 
  $(function() { 
    $(document).ready(function() { 
      $.post("./test/tree.action", {}, function(json) { 
        $("#tt").tree({ 
          data : json.itemsList, 
          onClick : function(node) { 
            $.post("./test/tree.action", { 
              "id" : node.id 
            }, function(json) { 
              $('#tt').tree('append', { 
                parent : node.target, 
                data : json.data 
              }); 
            }, "json"); 
          } 
        }); 
      }, "json"); 
    }); 
  }); 
</script> 
</head> 
<body> 
  <ul id="tt"></ul> 
</body>

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