easyUI treeGrid异步加载，前端+后台实现，包括增删改等具体功能
说明
前端使用的是easyUI 1.3.6+jq
后台使用的是springMVC
初始化调用后台getCourse方法，返回的json数据格式如下：
{"total":3,"rows":[
{"id":1,"typeName":"All Tasks","description":"3/4/2010","sort":"3/20/2010"},
{"id":2,"typeName":"All Tasks","description":"3/4/2010","sort":"3/20/2010","_parentId":1},
{"id":3,"typeName":"All Tasks","description":"3/4/2010","sort":"3/20/2010","_parentId":2}]
}保存一行数据，用js取得row的数据，再转化为json，调用saveCourseType传到后台。
删除一行，取得行id，调用deleteCourseType删除数据。
前端代码
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>CheckBox Tree - jQuery EasyUI Demotitle>
<link rel="stylesheet" type="text/css" href="<%=contextPath%>/js/easyui-1.3.6/themes/metro-blue/easyui.css">
<link rel="stylesheet" type="text/css" href="<%=contextPath%>/js/easyui-1.3.6/themes/icon.css">
<link rel="stylesheet" type="text/css" href="<%=contextPath%>/js/css/demo.css">
<script type="text/javascript" src="<%=contextPath%>/js/easyui-1.3.6/jquery.min.js">script>
<script type="text/javascript" src="<%=contextPath%>/js/easyui-1.3.6/jquery.easyui.min.js">script>
<title>可编辑的表格树title>
head>
//菜单栏
<div data-options="region:'north',title:''"
style="height: 25px; padding: 5px;">
<a href="#" class="easyui-linkbutton"
data-options="iconCls:'icon-edit'" onclick="beginEdit()">编辑a> <a
href="#" class="easyui-linkbutton" data-options="iconCls:'icon-save'"
onclick="saveEdit()">保存编辑a> <a href="#" class="easyui-linkbutton"
data-options="iconCls:'icon-add'" onclick="appendRoot()">新增根目录a> <a
href="#" class="easyui-linkbutton" data-options="iconCls:'icon-add'"
onclick="append()">新增目录a> <a href="#" class="easyui-linkbutton"
data-options="iconCls:'icon-cancel'" onclick="removeIt()">删除a>
div>
//treegrid主表
<table id="tg" class="easyui-treegrid" title="课程分类编辑"
style="width: 900px; height: 600px"
data-options="
iconCls: 'icon-ok',
rownumbers: true,
animate: true,
fitColumns: true,
url: '<%=contextPath%>/courseType/getCourseType',
method: 'get',
idField: 'id',
treeField: 'typeName',
onBeforeExpand:function(row){
$('#tg').treegrid('options').url = '<%=contextPath%>/courseType/getCourseType?parentId='+row.id;
},
onContextMenu: onContextMenu
">
<thead>
<tr>
<th data-options="field:'typeName',width:70,editor:'text'">名称th>
<th data-options="field:'description',width:50,editor:'text'">描述th>
<th data-options="field:'sort',width:20,editor:'text'">排序th>
tr>
thead>
table>
//右键菜单选项
<div id="mm" class="easyui-menu" style="width: 120px;">
<div onclick="append()" data-options="iconCls:'icon-add'">新增div>
<div onclick="removeIt()" data-options="iconCls:'icon-remove'">删除div>
<div class="menu-sep">div>
<div onclick="collapse()">收起div>
<div onclick="expand()">展开div>
div>JS代码
<script type="text/javascript">
//treegrid 的js代码
//编辑目录
var editingId=null;
function ff(row) {
$('#tg').treegrid('options').url ='<%=contextPath%>/courseType/getCourseType?parentId='+row.id;
}
function formatProgress(value) {
if (value) {
var s = ''
+ ''%;background:#cc0000;color:#fff">' + value + '%' + ''
'';
return s;
} else {
return '';
}
}
function onContextMenu(e, row) {
if (row) {
e.preventDefault();
$(this).treegrid('select', row.id);
$('#mm').menu('show', {
left : e.pageX,
top : e.pageY
});
}
}
//生成节点ID
function uuid() {
var s = [];
var hexDigits = "0123456789abcdef";
for (var i = 0; i < 36; i++) {
s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
}
s[14] = "4"; // bits 12-15 of the time_hi_and_version field to 0010
s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
s[8] = s[13] = s[18] = s[23] = "";
var uuid = s.join("");
return uuid;
}
//添加节点
function append() {
if (editingId != null){
$.messager.alert("提示信息", "请先保存");
return;
}
var uid=uuid();
var node = $('#tg').treegrid('getSelected');
expand();
var parentId;
if(node) parentId=node.id;
else parentId=null;
$('#tg').treegrid('append', {
parent : parentId,
data : [ {
id : uid,
typeName : '',
sort :'1'
} ]
})
editingId=uid;
if (editingId != null){
$('#tg').treegrid('select', editingId);
}
$('#tg').treegrid('beginEdit', editingId);
}
//添加跟节点
function appendRoot() {
if (editingId != null){
$.messager.alert("提示信息", "请先保存");
return;
}
var uid=uuid();
var node = $('#tg').treegrid('getSelected');
expand();
$('#tg').treegrid('append', {
parent : null,
data : [ {
id : uid,
typeName : '',
sort :'1'
} ]
})
editingId=uid;
if (editingId != null){
$('#tg').treegrid('select', editingId);
}
$('#tg').treegrid('beginEdit', editingId);
}
//移除节点
function removeIt() {
if (editingId != null){
$.messager.alert("提示信息", "请先保存");
return;
}
var node = $('#tg').treegrid('getSelected');
if (node==null)
$.messager.alert("提示信息", "请选择一个节点");
if (node) {
var dataObj = {};
ajaxCall("get", contextPath+'/courseType/deleteCourseType?id='+node.id, dataObj, function(XMLHttpRequest,
data) {
$.messager.alert("提示信息", "删除成功");
}, function(XMLHttpRequest) {
});
$('#tg').treegrid('remove', node.id);
}
}
function collapse() {
var node = $('#tg').treegrid('getSelected');
if (node) {
$('#tg').treegrid('collapse', node.id);
}
}
//展开节点
function expand() {
var node = $('#tg').treegrid('getSelected');
if (node) {
$('#tg').treegrid('expand', node.id);
}
}
//开始编辑
function beginEdit(){
if (editingId != null){
$('#tg').treegrid('cancelEdit', editingId);
$('#tg').treegrid('select', editingId);
editingId = null;
return;
}
var row = $('#tg').treegrid('getSelected');
if (row){
editingId = row.id
$('#tg').treegrid('beginEdit', editingId);
}
}
//保存编辑
function saveEdit(){
if (editingId != null){
var t = $('#tg');
t.treegrid('endEdit', editingId);
$('#tg').treegrid('select', editingId);
var row = $('#tg').treegrid('getSelected');
var dataObj = {};
dataObj.rows = JSON.stringify(row);
ajaxCall("post", contextPath+'/courseType/saveCourseType', dataObj, function(XMLHttpRequest,
data) {
$.messager.alert("提示信息", "保存成功");
}, function(XMLHttpRequest) {
});
editingId = null;
}
}
script>后台java代码
//获取treegrid列表
@RequestMapping(value = "/getCourseType")
public @ResponseBody Map<String,Object> tree_data(HttpServletRequest request) throws Exception {
String parentId = ConvertUtils.cStr(request.getParameter("parentId"));
Map<String, Object> param = new HashMap<String,Object>();
List<CourseType> courseTypes = new ArrayList<CourseType>();
if(StringUtils.isNotEmpty(parentId)){
courseTypes = courseTypeService.queryTree(null, parentId,null);
} else {
courseTypes = courseTypeService.queryTree(null, null,"1");
}
List<Map<String,Object>> dateList = new ArrayList<Map<String,Object>>();
if(courseTypes.size()>0){
Map<String,Object> map = null;
Map<String, Object> params = new HashMap<String,Object>();
for(CourseType courseType:courseTypes){
map = new HashMap<String,Object>();
map.put("id", courseType.getId());
map.put("typeName", courseType.getTypeName());
map.put("sort", courseType.getSort());
map.put("description", courseType.getDescription());
if(StringUtils.isEmpty(courseType.getParentId())){
map.put("_parentId", null);
}
else{
map.put("_parentId", courseType.getParentId());
}
//根据id判断是否有子节点
params.put("parentId", courseType.getId());
int count = courseTypeService.querySelectRowCount(params);
if(count>0){
map.put("state", "closed");
}
dateList.add(map);
}
}
param.put("rows", dateList);
return param;
}
//保存treegrid的某一列
@RequestMapping(value = "/saveCourseType", method = RequestMethod.POST)
public @ResponseBody int saveDirectory(HttpServletRequest request) throws Exception {
Map<String, Object> params = CommonUtil.getNewSqlMap();
String rows = ConvertUtils.cStr(request.getParameter("rows"));
Map<String,String> map=JsonParser.parseJsonStrNull(rows);
params.put("id",map.get("id"));
params.put("typeName",map.get("typeName"));
params.put("description", map.get("description"));
params.put("parentId", map.get("_parentId"));
params.put("sort", map.get("sort"));
params.put("delFlag", 0);
String parentIds=map.get("_parentId")+",";
String parentId=map.get("_parentId");
while(true){
parentId=courseTypeService.findParentId(parentId);
if(StringUtils.isEmpty(parentId)){
break;
}
parentIds=parentIds+parentId+",";
}
params.put("parentIds", parentIds);
if(courseTypeService.updateObject(params)==0){
courseTypeService.saveObject(params);
}
return 1;
}
//删除某一行
@RequestMapping(value = "/deleteCourseType")
public @ResponseBody Map<String, Object> deleteDirectory(HttpServletRequest request) throws Exception {
String id=ConvertUtils.cStr(request.getParameter("id"));
Map<String,Object> result = new HashMap<String, Object>();
Map<String, Object> params = CommonUtil.getNewSqlMap();
params.put("id",id);
courseTypeService.deleteObject(params);
return result;
}注意事项
1.后台传回的json数据的key，必须与前端treegrid的表头name相对应。
2.要使用编辑功能，前端表头必须加入editor:’text’参数，具体类型参见官方文档。
3.后台传回的参数如果包含state参数，state为closed代表该节点具有子节点。
4.后台传回的json数据必须有一个以上是不包含_parentId字段的，也就是必须要有父节点，否则无法显示。