jquery easyui树的简答构造：
JSP页面
组织机构： <input id="p_organId" name="p_organId" style="width: 160px;height: 28px;">
function loadOrgan(){
organ_combotree = $("#p_organId").combotree({
url:'${ctxFront}/cust/tree',
multiple:false,//是否可多选
editable:false,//是否可编辑
required:false
});
}
后台代码：
/**
* easyui树形节点TreeNode模型.
*
* @author : 尔演&Eryan eryanwcp@gmail.com
* @date : 2013-1-11 下午10:01:30
*/
@SuppressWarnings("serial")
public class TreeNode implements Serializable {
/**
* 静态变量 展开节点
*/
public static final String STATE_OPEN = "open";
/**
* 静态变量 关闭节点
*/
public static final String STATE_CLOASED = "closed";
/**
* 节点id
*/
private String id;
/**
* 父级节点id （用于zTree简单数据模型）
*/
private String pId;
/**
* 树节点名称
*/
private String text;
/**
* 前面的小图标样式
*/
private String iconCls = "";
/**
* 是否勾选状态（默认：否false）
*/
private Boolean checked = false;
/**
* 自定义属性
*/
private Map<String, Object> attributes = Maps.newHashMap();
/**
* 子节点
*/
private List<TreeNode> children;
/**
* 是否展开 (open,closed)-(默认值:open)
*/
private String state = STATE_OPEN;
public TreeNode() {
this(null, null, "");
}
/**
*
* @param id
* 节点id
* @param text
* 树节点名称
*/
public TreeNode(String id, String text) {
this(id, text, "");
}
/**
*
* @param id
* 节点id
* @param text
* 树节点名称
* @param iconCls
* 图标样式
*/
public TreeNode(String id, String text, String iconCls) {
this(id, text, STATE_OPEN, iconCls);
}
/**
*
* @param id
* 节点id
* @param text
* 树节点名称
* @param state
* 是否展开
* @param iconCls
* 图标样式
*/
public TreeNode(String id, String text, String state, String iconCls) {
this.id = id;
this.text = text;
this.state = state;
this.iconCls = iconCls;
this.children = Lists.newArrayList();
}
/**
*
* @param id
* 节点id
* @param text
* 树节点名称
* @param iconCls
* 图标样式
* @param checked
* 是否勾选状态（默认：否）
* @param attributes
* 自定义属性
* @param children
* 子节点
* @param state
* 是否展开
*/
public TreeNode(String id, String text, String iconCls, Boolean checked,
Map<String, Object> attributes, List<TreeNode> children,
String state) {
super();
this.id = id;
this.text = text;
this.iconCls = iconCls;
this.checked = checked;
this.attributes = attributes;
this.children = children;
this.state = state;
}
/**
* 添加子节点.
*
* @param childNode
* 子节点
*/
public TreeNode addChild(TreeNode childNode) {
this.children.add(childNode);
return this;
}
/**
* 节点id
*/
public String getId() {
return id;
}
public TreeNode setId(String id) {
this.id = id;
return this;
}
/**
* 父级节点id （用于zTree简单数据模型）
* @return
*/
public String getpId() {
return pId;
}
/**
* @param pId 父级节点id （用于zTree简单数据模型）
* @return
*/
public TreeNode setpId(String pId) {
this.pId = pId;
return this;
}
/**
* 树节点名称
*/
public String getText() {
return text;
}
public TreeNode setText(String text) {
this.text = text;
return this;
}
/**
* 是否勾选状态（默认：否）
*/
public Boolean getChecked() {
return checked;
}
public TreeNode setChecked(Boolean checked) {
this.checked = checked;
return this;
}
/**
* 自定义属性
*/
public Map<String, Object> getAttributes() {
return attributes;
}
public TreeNode setAttributes(Map<String, Object> attributes) {
this.attributes = attributes;
return this;
}
/**
* 子节点
*/
public List<TreeNode> getChildren() {
return children;
}
public TreeNode setChildren(List<TreeNode> children) {
this.children = children;
return this;
}
/**
* 是否展开
*/
public String getState() {
return state;
}
public TreeNode setState(String state) {
this.state = state;
return this;
}
/**
* 图标样式
*/
public String getIconCls() {
return iconCls;
}
public TreeNode setIconCls(String iconCls) {
this.iconCls = iconCls;
return this;
}
@Override
public String toString() {
return ToStringBuilder.reflectionToString(this);
}
}
@RequestMapping(value = {"tree"})
@ResponseBody
@DataSource(AppConstants.DATASOURCE_DW)//切换到datasource数据源
public List<TreeNode> tree() throws Exception {
List<TreeNode> treeNodes = Lists.newArrayList();
TreeNode proNode = new TreeNode("113600","江西省");
proNode.setChecked(false);
proNode.setIconCls("icon-organ-root");
proNode.setpId(null);
proNode.setState("closed");
List<Map> citylist=custService.findBySql("select distinct city_id,city_name from dim_organ_sale_procityxian where pro_id='113600' order by city_id", new Parameter());
List<TreeNode> citytree = Lists.newArrayList();
for(Map cityMap :citylist){
TreeNode cityNode = new TreeNode((String)cityMap.get("CITY_ID"),(String)cityMap.get("CITY_NAME"));
cityNode.setChecked(false);
cityNode.setIconCls("icon-organ-root");
cityNode.setpId(null);
cityNode.setState("closed");
List<Map> xialist=custService.findBySql("select distinct xia_id,xia_name from dim_organ_sale_procityxian where city_id='"+cityMap.get("CITY_ID")+"' order by xia_id", new Parameter());
List<TreeNode> xiatree = Lists.newArrayList();
for(Map xiaMap :xialist){
TreeNode xiaNode = new TreeNode((String)xiaMap.get("XIA_ID"),(String)xiaMap.get("XIA_NAME"));
xiaNode.setChecked(false);
xiaNode.setIconCls("icon-organ-root");
xiaNode.setpId(null);
xiaNode.setState("open");
xiatree.add(xiaNode);
}
cityNode.setChildren(xiatree);
citytree.add(cityNode);
}
proNode.setChildren(citytree);
treeNodes.add(proNode);
return treeNodes;
}
由于我的机构表没有父子关系，所以不能用递归的方法进行构造，只是一层层的手动构造，不过从这手动简单的构造可以学到要形成树形的数据结构
[ {
"id" : "113600",
"pId" : null,
"text" : "江西省",
"iconCls" : "icon-organ-root",
"checked" : false,
"attributes" : { },
"children" : [ {
"id" : "113601",
"pId" : null,
"text" : "南昌市",
"iconCls" : "icon-organ-root",
"checked" : false,
"attributes" : { },
"children" : [ {
"id" : "11360102",
"pId" : null,
"text" : "南昌县",
"iconCls" : "icon-organ-root",
"checked" : false,
"attributes" : { },
"children" : [ ],
"state" : "open"
}],
"state" : "closed"
},
"state" : "closed"
} ]
可以看出，要形成树有2个方法，1.json里面有children集合；2.json里面有_parentId。
动态生成js全局变量：
由于android项目中要不同Tab页进行分页，需要根据栏目的数量动态生成页码page变量存放页码。
for(var i = 0; i < 4; i++) {
window["page" + i] = 1;
}
相当于生成了var page0=1;var page1=1;var page2=1;var page3=1;
在后面的使用中可以用使用，或者用window["page" + i] 当变量用。比如累加：window["page" + i] ++；或者赋值var page=window["page" + i]
