Four) draw a tree

Actual code:

Importjava.util.ArrayList;Importjava.util.List;ImportNet.sf.json.JSONArray;ImportNet.sf.json.JSONObject;Importorg.junit.Test; Public classDigui {@Test Public voidDrawtree () {List<Node> nodeList =NewArraylist<node>(); Nodelist.add (NewNode ("0001", "null", "China")); Nodelist.add (NewNode ("0002", "0001", "Hebei")); Nodelist.add (NewNode ("0003", "0001", "Liaoning")); Nodelist.add (NewNode ("0004", "0002", "Shijiazhuang")); Nodelist.add (NewNode ("0005", "0003", "Shenyang")); Nodelist.add (NewNode ("0006", "null", "United States")); Nodelist.add (NewNode ("0007", "0006", "New York")); System.out.println (Children ("NULL", nodeList)); }    //recursive conditions: 1. Extension 2. There's an end.     PublicJsonarray Children (String my, list<node>nodes) {Jsonarray Mychildren=NewJsonarray ();  for(Node node:nodes) {String ID=Node.getid (); String PID=Node.getpid (); if(My.equals (PID)) {Jsonobject MyChild=NewJsonobject (); Mychild.put ("id", id); Mychild.put ("pid", PID); Mychild.put ("Name", Node.getname ()); Jsonarray Mychildchildren=Children (ID, nodes); if(Mychildchildren.size () > 0) Mychild.put ("Children", Mychildchildren);            Mychildren.add (MyChild); }        }        returnMychildren; }}classNode { PublicNode (string ID, string pid, string name) { This. ID =ID;  This. PID =pid;  This. Name =name; }    PrivateString ID; PrivateString pid; PrivateString name;  PublicString getId () {returnID; }     Public voidsetId (String id) { This. ID =ID; }     PublicString getpid () {returnpid; }     Public voidsetpid (String pid) { This. PID =pid; }     PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; } @Override PublicString toString () {return"Node [id=" + ID + ", pid=" + pid + ", name=" + name + "]"; }}

Printing results:

[{"id": "0001", "pid": null, "name": "China", "children": [{"id": "0002", "pid": "0001", "name": "Hebei", "children": [{"id": "0004 "," pid ":" 0002 "," name ":" Shijiazhuang "}]},{" id ":" 0003 "," pid ":" 0001 "," name ":" Liaoning "," children ": [{" id ":" 0005 "," pid ":" 0003 "," Name ":" Shenyang "}]}]},{" id ":" 0006 "," pid ": null," name ":" United States "," children ": [{" id ":" 0007 "," pid ":" 0006 "," Name ":" New York "}]}]

Formatting results:

[    {        "ID":"0001",        "PID":NULL,        "name":"China",        "Children": [            {                "ID":"0002",                "PID":"0001",                "name":"Hebei",                "Children": [                    {                        "ID":"0004",                        "PID":"0002",                        "name":"Shijiazhuang"                    }                ]            },            {                "ID":"0003",                "PID":"0001",                "name":"Liaoning",                "Children": [                    {                        "ID":"0005",                        "PID":"0003",                        "name":"Shenyang"                    }                ]            }        ]    },    {        "ID":"0006",        "PID":NULL,        "name":"United States",        "Children": [            {                "ID":"0007",                "PID":"0006",                "name":"New York"            }        ]    }]

Actual Project application See:Smse

To Easyui-tree

Four) draw a tree