一直以来没工夫仔细琢磨菜单树怎么做，只知道递归，现在才有空闲实现一次。
数据结构：
调用部分的代码，浏览器地址为：http://127.0.0.1:8080/admin/resource/menu?userId=23123
buildTree的代码：
public JSONArray buildTree(List<Resource> resListAll, List<Resource> iteratedList, int parentId) {
JSONArray arr = new JSONArray();
for (Resource resource : resListAll) {
if (iteratedList.contains(resource)) {
continue;
}
if (resource.getParentId() == parentId) {
iteratedList.add(resource);
String text = JSONObject.toJSONString(resource);
JSONObject res = JSONObject.parseObject(text);
arr.add(res);
res.put("children", buildTree(resListAll, iteratedList, resource.getId()));
}
}
return arr;
}
结果：
{
"resourceTree": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "采购管理",
"parentId": 0,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544149306000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "非日常采购",
"parentId": 5,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 23,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "日常采购管理",
"parentId": 5,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 22,
"resourceType": "menu"
}],
"id": 5,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "场地管理",
"parentId": 0,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544148935000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "合作酒店场地管理",
"parentId": 4,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 21,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "会议室场地管理",
"parentId": 4,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 20,
"resourceType": "menu"
}],
"id": 4,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "支出管理",
"parentId": 0,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544148987000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "投标支出管理",
"parentId": 3,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "星际投标",
"parentId": 19,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "仙女星云投标",
"parentId": 30,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544443215000,
"children": [],
"id": 33,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "银河系投标",
"parentId": 30,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544443211000,
"children": [],
"id": 32,
"resourceType": "menu"
}],
"id": 30,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "国际投标",
"parentId": 19,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 29,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "国内投标",
"parentId": 19,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 28,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "省内投标",
"parentId": 19,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 27,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "市内投标",
"parentId": 19,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 26,
"resourceType": "menu"
}],
"id": 19,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "日常支出管理",
"parentId": 3,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 18,
"resourceType": "menu"
}],
"id": 3,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "考勤管理",
"parentId": 0,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544148905000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "会议考勤管理",
"parentId": 2,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 17,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "日常考勤管理",
"parentId": 2,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 16,
"resourceType": "menu"
}],
"id": 2,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "系统管理",
"parentId": 0,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544148843000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "签到管理",
"parentId": 1,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [{
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "离场签到",
"parentId": 15,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 25,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "进场签到",
"parentId": 15,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 24,
"resourceType": "menu"
}],
"id": 15,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "页面管理",
"parentId": 1,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 14,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "菜单管理",
"parentId": 1,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 13,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "权限管理",
"parentId": 1,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 12,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "",
"orderNum": 0,
"resourceDescription": "",
"resourceName": "角色管理",
"parentId": 1,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 11,
"resourceType": "menu"
}, {
"resourceRemark": "",
"resourceContent": "/",
"orderNum": 0,
"resourceDescription": "首页页面",
"resourceName": "用户管理",
"parentId": 1,
"resourceStatus": "disabled",
"depth": 0,
"resourceUrl": "",
"createTime": 1544444261000,
"children": [],
"id": 10,
"resourceType": "menu"
}],
"id": 1,
"resourceType": "menu"
}]
}