废话不多说直接上代码

/***      * 生成树形结构 在不知道跟节点的情况下* @param list  源数据* @param nodeList 跟节点数据* @param childName 子节点名称* @param key 节点key* @param up_key 上级节点key* @param child_level 节点级别 1,2,3...* @return*/public static JSONArray recursionCreateArrayNotRoot(JSONArray list, JSONArray nodeList, String childName, String key, String up_key, int child_level) {if (nodeList == null) {//跟节点为空的情况下 ，遍历查询跟节点nodeList = new JSONArray();//作为跟节点的存在for (int i = 0; i < list.size(); i++) {boolean mark = false;JSONObject n = list.getJSONObject(i);for (int j = 0; j < list.size(); j++) {JSONObject m = list.getJSONObject(j);if (n.optString(up_key).equals(m.optString(key))) {mark = true;break;}}if (!mark) {n.put("child_level", child_level);nodeList.add(n);//添加的是没有上级的}}list.removeAll(nodeList);//将根节点移除出列表}//为根节点寻找下级for (int i = 0; i < nodeList.size(); i++) {JSONObject n = nodeList.getJSONObject(i);JSONArray child = n.optJSONArray(childName);if (child == null) {child = new JSONArray();}for (int j = 0; j < list.size(); j++) {JSONObject m = list.getJSONObject(j);m.put("child_level", child_level + 1);if (n.optString(key).equals(m.optString(up_key))) {child.add(m);}}n.put(childName, child);list.removeAll(child);//跟节点的下级找到后移除列表recursionCreateArrayNotRoot(list, n.optJSONArray(childName), childName, key, up_key, child_level + 1);//不断的寻找下级}return nodeList;}
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理论上这个方法可以通用，不管你们定义的关键字是什么都可以使用

调用方法  JSONArray result = jJson.recursionCreateArrayNotRoot(array, null, "child","org_key", "up_org_key", 1);
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原始数据

    [
{"org_key":"2001","up_org_key":"0","usr_org_key":"1001","usr_org_name":"光明城","user_org_code":"10","boss_id":"10010","org_name":"光明城1","org_code":"12","area_key":"qBkXGHYS6H2r3l8hQsOWOC8C12kMeEHw","org_level":"1","area_name":"虎邱村"
},
{"org_key":"2002","up_org_key":"2001","usr_org_key":"1002","usr_org_name":"晋安区","user_org_code":"10-0001","boss_id":"10010","org_name":"晋安区","org_code":"12-1","area_key":"qBkXGHYS6H2r3l8hQsOWOC8C12kMeEHw","org_level":"2","area_name":"虎邱村"
},
{"org_key":"2003","up_org_key":"0","usr_org_key":"","usr_org_name":"","user_org_code":"","boss_id":"10010","org_name":"鼓楼区","org_code":"11","area_key":"qBkXGHYS6H2r3l8hQsOWOC8C12kMeEHw","org_level":"1","area_name":"虎邱村"
},
{"org_key":"org_fTZXL9Vea8mLlxVCeGEWbFr4cQHQDQhZ","up_org_key":"2001","usr_org_key":"org_iU57sIDvHmM6LljFPSZbgNVieVhjKyBQ","usr_org_name":"福州测试小区","user_org_code":"10-0003","boss_id":"10010","org_name":"福州测试小区","org_code":"12-2","area_key":"U7okhSHxC8Vs1c3YXxQleRiiIYelvmdL","org_level":"2","area_name":"文楼村"
},
{"org_key":"org_7I7UNQloRMuZBC6RQlp6gZf9KDgiI3hm","up_org_key":"2001","usr_org_key":"","usr_org_name":"","user_org_code":"","boss_id":"10010","org_name":"花园小区","org_code":"12-5","area_key":"IfwmlJrHl6137YZ7FvmcW1QjlNYoGWkS","org_level":"2","area_name":"福耀社区"
},
{"org_key":"org_fx5fjorqBRWJgWR4CxMx3Wquq0CimhnE","up_org_key":"2003","usr_org_key":"org_HHsupVt4HPzfcpSZShchbLivotsVdaFK","usr_org_name":"大儒世家","user_org_code":"003","boss_id":"10010","org_name":"五凤街道","org_code":"11-1","area_key":"DxeRGfT5mP2tq1Yw4b7hqzDckZiL2T9W","org_level":"2","area_name":"福和社区"
},
{"org_key":"org_gG6L68Wt0zjmCxp0dIWM0XKDCToyFndZ","up_org_key":"org_gG6L68Wt0zjmCxp0dIWM0XKDCToyFndZ","usr_org_key":"","usr_org_name":"","user_org_code":"","boss_id":"10010","org_name":"部门A","org_code":"001","area_key":"vI59WqwHEDLvdyc3SI2Z0p1u8ZQl6dvl","org_level":"2","area_name":"柏渡村"
},
{"org_key":"org_IXGMspHF6FZFrhZEWJGQpijR1hH0aQ1C","up_org_key":"org_7I7UNQloRMuZBC6RQlp6gZf9KDgiI3hm","usr_org_key":"org_EdLEdVgGciifkYeRmluNawW6Tjgxq4Fu","usr_org_name":"西洪小区","user_org_code":"0021","boss_id":"10010","org_name":"区委会","org_code":"12-5-1","area_key":"pMhxXlafOcYeQ0vNWf3nz1tIdwvS0JdN","org_level":"3","area_name":"玉峰村"
},
{"org_key":"org_hCtV75g3cB6bBqJHarfRvKwG1YjEKwwX","up_org_key":"org_IXGMspHF6FZFrhZEWJGQpijR1hH0aQ1C","usr_org_key":"","usr_org_name":"","user_org_code":"","boss_id":"10010","org_name":"某某部门","org_code":"12-5-1-1","area_key":"U7okhSHxC8Vs1c3YXxQleRiiIYelvmdL","org_level":"4","area_name":"文楼村"
}
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]

生成后的数据

[
{"org_key":"2001","up_org_key":"0","usr_org_key":"1001","usr_org_name":"光明城","user_org_code":"10","boss_id":"10010","org_name":"光明城1","org_code":"12","area_key":"qBkXGHYS6H2r3l8hQsOWOC8C12kMeEHw","org_level":"1","area_name":"虎邱村","child_level":1,"child":[{"org_key":"2002","up_org_key":"2001","usr_org_key":"1002","usr_org_name":"晋安区","user_org_code":"10-0001","boss_id":"10010","org_name":"晋安区","org_code":"12-1","area_key":"qBkXGHYS6H2r3l8hQsOWOC8C12kMeEHw","org_level":"2","area_name":"虎邱村","child_level":2,"child":[]},{"org_key":"org_fTZXL9Vea8mLlxVCeGEWbFr4cQHQDQhZ","up_org_key":"2001","usr_org_key":"org_iU57sIDvHmM6LljFPSZbgNVieVhjKyBQ","usr_org_name":"福州测试小区","user_org_code":"10-0003","boss_id":"10010","org_name":"福州测试小区","org_code":"12-2","area_key":"U7okhSHxC8Vs1c3YXxQleRiiIYelvmdL","org_level":"2","area_name":"文楼村","child_level":2,"child":[]},{"org_key":"org_7I7UNQloRMuZBC6RQlp6gZf9KDgiI3hm","up_org_key":"2001","usr_org_key":"","usr_org_name":"","user_org_code":"","boss_id":"10010","org_name":"花园小区","org_code":"12-5","area_key":"IfwmlJrHl6137YZ7FvmcW1QjlNYoGWkS","org_level":"2","area_name":"福耀社区","child_level":2,"child":[{"org_key":"org_IXGMspHF6FZFrhZEWJGQpijR1hH0aQ1C","up_org_key":"org_7I7UNQloRMuZBC6RQlp6gZf9KDgiI3hm","usr_org_key":"org_EdLEdVgGciifkYeRmluNawW6Tjgxq4Fu","usr_org_name":"西洪小区","user_org_code":"0021","boss_id":"10010","org_name":"区委会","org_code":"12-5-1","area_key":"pMhxXlafOcYeQ0vNWf3nz1tIdwvS0JdN","org_level":"3","area_name":"玉峰村","child_level":3,"child":[{"org_key":"org_hCtV75g3cB6bBqJHarfRvKwG1YjEKwwX","up_org_key":"org_IXGMspHF6FZFrhZEWJGQpijR1hH0aQ1C","usr_org_key":"","usr_org_name":"","user_org_code":"","boss_id":"10010","org_name":"某某部门","org_code":"12-5-1-1","area_key":"U7okhSHxC8Vs1c3YXxQleRiiIYelvmdL","org_level":"4","area_name":"文楼村","child_level":4,"child":[]}]}]}]
},
{"org_key":"2003","up_org_key":"0","usr_org_key":"","usr_org_name":"","user_org_code":"","boss_id":"10010","org_name":"鼓楼区","org_code":"11","area_key":"qBkXGHYS6H2r3l8hQsOWOC8C12kMeEHw","org_level":"1","area_name":"虎邱村","child_level":1,"child":[{"org_key":"org_fx5fjorqBRWJgWR4CxMx3Wquq0CimhnE","up_org_key":"2003","usr_org_key":"org_HHsupVt4HPzfcpSZShchbLivotsVdaFK","usr_org_name":"大儒世家","user_org_code":"003","boss_id":"10010","org_name":"五凤街道","org_code":"11-1","area_key":"DxeRGfT5mP2tq1Yw4b7hqzDckZiL2T9W","org_level":"2","area_name":"福和社区","child_level":2,"child":[]}]
}
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]