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jQuery树插件zTree使用方法详解

页面的基本结构是这样的

jQuery树插件zTree使用方法详解

这里的样式是使用了metroStyle文件夹里的类bootstrap风格，当然首先需要下载ztree插件，直接百度即可，下载完成后由对应的api和一些例子，这里使用的是复选框模板

jQuery  zTree树的下载链接

页面jsp如下：

<html> 
<head> 
 <meta http-equiv="content-type" content="text/html; charset=UTF-8"> 
 <title> ZTREE DEMO - checkbox</title> 
 <link rel="stylesheet" href="/css/demo.css" target="_blank" rel="external nofollow"  rel="external nofollow" > 
 <link rel="stylesheet" href="/css/metroStyle.css" target="_blank" rel="external nofollow"  rel="external nofollow" > 
 <script type="text/javascript" src="/js/jquery-3.2.1.js"></script> 
 <script type="text/javascript" src="/js/jquery.ztree.core.js"></script> 
 <script type="text/javascript" src="/js/jquery.ztree.excheck.js"></script> 
  
 <script type="text/javascript" src="/js/jquery.ztree.exedit.js"></script> 
 
 <script type="text/javascript"> 
  var setting = { 
   check: { 
    enable: true 
   }, 
   data: { 
    simpleData: { 
     enable: true 
    } 
   }, 
   callback:{ 
    onCheck:onCheck 
   } 
  }; 
 
//  var zNodes =[ 
//   { id:1, pId:0, name:"随意勾选 1", open:true}, 
//   { id:11, pId:1, name:"随意勾选 1-1", open:false}, 
//   { id:111, pId:11, name:"随意勾选 1-1-1"}, 
//   { id:112, pId:11, name:"随意勾选 1-1-2"}, 
//   { id:12, pId:1, name:"随意勾选 1-2", open:false}, 
//   { id:121, pId:12, name:"随意勾选 1-2-1"}, 
//   { id:122, pId:12, name:"随意勾选 1-2-2"}, 
//   { id:2, pId:0, name:"随意勾选 2", checked:false, open:false}, 
//   { id:21, pId:2, name:"随意勾选 2-1"}, 
//   { id:22, pId:2, name:"随意勾选 2-2", open:false}, 
//   { id:221, pId:22, name:"随意勾选 2-2-1", checked:false}, 
//   { id:222, pId:22, name:"随意勾选 2-2-2"}, 
//   { id:23, pId:2, name:"随意勾选 2-3"}, 
    
    
//   { id:3, pId:0, name:"随意勾选 3", checked:false, open:false}, 
//   { id:231, pId:3, name:"随意勾选 3-1"}, 
//   { id:232, pId:3, name:"随意勾选 3-2", open:false}, 
//   { id:2321, pId:232, name:"随意勾选 3-2-1", checked:false}, 
//   { id:2322, pId:232, name:"随意勾选 3-2-2"}, 
//   { id:233, pId:3, name:"随意勾选 3-3"} 
    
//  ]; 
   
  var code; 
   
  function setCheck() { 
   var zTree = $.fn.zTree.getZTreeObj("treeDemo"), 
   py = $("#py").attr("checked")? "p":"", 
   sy = $("#sy").attr("checked")? "s":"", 
   pn = $("#pn").attr("checked")? "p":"", 
   sn = $("#sn").attr("checked")? "s":"", 
   type = { "Y":py + sy, "N":pn + sn}; 
   zTree.setting.check.chkboxType = type; 
//   showCode('setting.check.chkboxType = { "Y" : "' + type.Y + '", "N" : "' + type.N + '" };'); 
//   showCode('setting.check.chkboxType = { "Y" : "", "N" : "" };'); 
   showCode('setting.check.chkboxType = { "Y" : "s", "N" : "ps" };'); 
    
//   setting.check.chkboxType = { "Y" : "", "N" : "" }; 
  } 
  function showCode(str) { 
   if (!code) code = $("#code"); 
   code.empty(); 
   code.append("<li>"+str+"</li>"); 
  } 
   
  var zNodes =[]; 
  $(document).ready(function(){ 
   var t = $("#treeDemo"); 
   $.ajax({ 
    type: "POST", 
    url: "/Units/ListTree", 
    dataType: 'json', 
    success: function(result) { 
     console.log(result); 
     $.extend( true, zNodes, result ); 
     console.log(zNodes); 
      t = $.fn.zTree.init(t, setting, zNodes); 
//     demoIframe = $("#testIframe"); 
    } 
   }); 
  }); 
   
  $(document).ready(function(){ 
   $.fn.zTree.init($("#treeDemo"), setting, zNodes); 
   setCheck(); 
   $("#py").bind("change", setCheck); 
   $("#sy").bind("change", setCheck); 
   $("#pn").bind("change", setCheck); 
   $("#sn").bind("change", setCheck); 
    
  }); 
   
  function onCheck(e,treeId,treeNode){ 
   var treeObj=$.fn.zTree.getZTreeObj("treeDemo"), 
   nodes=treeObj.getCheckedNodes(true), 
   v=""; 
   for(var i=0;i<nodes.length;i++){ 
   v+=nodes[i].name + ","; 
   alert(nodes[i].id); //获取选中节点的值 
   } 
  } 
   
     
 </script> 
</head> 
 
<body> 
 <div class="tree" style="margin-left: 534px;background: #316ac5;width: 0px;"> 
  <ul id="treeDemo" class="ztree" style="background: white;height: inherit;margin-top: 295px;"></ul> 
 </div> 
   <input type="checkbox" id="py" class="checkbox first" checked style="display:none;" /> 
   <input type="checkbox" id="sy" class="checkbox first" checked style="display:none;"/> 
   <input type="checkbox" id="pn" class="checkbox first" checked style="display:none;"/> 
   <input type="checkbox" id="sn" class="checkbox first" checked style="display:none;"/> 
       
</body> 
</html>

上面的死数据替换为后台赋予的值，用的是ajax方式，当然后台需要用json方式进行交互

java代码控制器代码如下：

@Controller 
@RequestMapping("/Units") 
public class UnitsController{ 
 
 
 @Autowired 
 private UnitsService unitsService; 
  
  
  
 @RequestMapping("/ListTree") 
 @ResponseBody 
 public List<JSONObject> ListTree(){ 
   
  List<JSONObject> jsonList = new ArrayList<JSONObject>(); 
  List<Units> zTreeAll = unitsService.zTreeAll(); 
   
  for (Units units : zTreeAll) { 
   JSONObject json = new JSONObject(); 
//   { id:1, pId:0, name:"随意勾选 1", open:false} 
   if(units.getUnitsId() == units.getNodeData()){ 
     
     
    JSONObject json1 = new JSONObject(); 
     
    json1.put("id", units.getUnitsId()); 
    json1.put("pId", 0); 
    json1.put("name", units.getUnitsName()); 
    json1.put("open", false); 
     
    jsonList.add(json1); 
     
    json.put("id", -1); 
    json.put("pId", units.getNodeData()); 
    json.put("name", units.getSectorName()); 
    json.put("open", false); 
     
   }else{ 
     
    json.put("id", units.getUnitsId()); 
    json.put("pId", units.getNodeData()); 
    json.put("name", units.getSectorName()); 
    json.put("open", false); 
     
   } 
    
   jsonList.add(json); 
    
  } 
// for (JSONObject units : jsonList) { 
   
//  System.out.println(jsonList.toString()); 
   
// } 
   
   
  return jsonList; 
 } 
}

这样就可以实现所需要的树结构，ztree树是可以无限扩展的，就按照个人所需，来选择模板就可以了

jsp中的这段代码是获得当前选择值得id

function onCheck(e,treeId,treeNode){ 
   var treeObj=$.fn.zTree.getZTreeObj("treeDemo"), 
   nodes=treeObj.getCheckedNodes(true), 
   v=""; 
   for(var i=0;i<nodes.length;i++){ 
   v+=nodes[i].name + ","; 
   alert(nodes[i].id); //获取选中节点的值 
   } 
  }
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