Jquery easyui 实现动态树

前端技术 2023/09/09 JavaScript

在上篇文章给大家介绍了jquery中EasyUI实现异步树，本文给大家介绍jquery easyui实现动态树。

首先是在jsp页面中引入相关的js文件
在body中加入流程列表，通过后天拼接json数据
具体内容请看下面代码详情吧。

首选在jsp页面中引入相关的js

<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>

后台拼接json数据

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;
/**
 * 加载流程下的节点的名称
 * @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;//去掉最后一个逗号
   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;//去掉最后一个逗号
   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;
 }
}

下面一段代码是EasyUI Jquery 动态加载树，点击节点加载

<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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