最近要做一个树结构，就使用了jQuery 的树插件，感觉还不错，做个随笔
页面的基本结构是这样的
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
页面jsp如下：
<html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title> ZTREE DEMO - checkbox</title> <link href="https://www.jb51.net/css/demo.css" > <link href="https://www.jb51.net/css/metroStyle.css" > <script type="text/javascript" src="https://www.jb51.net/js/jquery-3.2.1.js"></script> <script type="text/javascript" src="https://www.jb51.net/js/jquery.ztree.core.js"></script> <script type="text/javascript" src="https://www.jb51.net/js/jquery.ztree.excheck.js"></script> <script type="text/javascript" src="https://www.jb51.net/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> <ul></ul> </div> <input type="checkbox" checked /> <input type="checkbox" checked/> <input type="checkbox" checked/> <input type="checkbox" checked/> </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