JSON string formatting

Recently and a third-party system docking, need to save their request parameters, but that long string of JSON is not good to read, so want to format a bit, this tool has a lot, but I want to get a play.
The first implementation uses a lot of judgment, logic is very round. Later think of reading a template engine before the source code, which used a state diagram, so I also tried to use the next.

public class Main {private static String New_line = "\ r \ n"; public static void Main (string[] args) {String json = "[{\" name\ ": \" wen\ ", \" age\ ": 12,\" flag\ ": True,\" job\ ": [{\        "name\": \ "Java\"},{\ "name\": \ "c++\"}]},{\ "name\": \ "yun\", \ "age\": 13,\ "flag\": false}] ";    SYSTEM.OUT.PRINTLN (Format (JSON)); } private static string format (string json) {//Removes the original format json = Json.replace ("\ n", ""). Replace ("\ r", "").        Replace ("\ T", "");        StringBuilder sb = new StringBuilder (); int prevstatus = 0;//on a state int level = 0;//indent hierarchy for (char C:json.tochararray ()) {int oper = g            Etoperation (Prevstatus, C);                    Switch (oper) {case 1:sb.append (new_line). Append (Gettab (level));                Break                    Case 2:level++;                    Sb.append (New_line). Append (Gettab (level));                Break    Case 3:level--;                Sb.append (New_line). Append (Gettab (level));                Break                    Case 4:sb.append (");            Break            } sb.append (c);        Prevstatus = GetStatus (c);    } return sb.tostring (); }//return: 0 Direct output, 1 line break, 2 increase indent and wrap, 3 decrease Indent and line break, 4 front plus space private static int[][] Statusarr = new int[][] {{0, 0, 0, 0, 0, 3  },//ordinary character {1, 2, 2, 0, 0, 0},//{[{2, 0, 4, 0, 0, 0},//: {3, 1, 4, 0, 0, 0},//, {4, 0, 0, 0, 0, 3},};//}]//action based on previous state and current character private static int getoperation (int status, char c) {return Statu    Sarr[status][getstatus (c) + 1];        }//character converted to the corresponding state private static int getStatus (char c) {int status = 0;                Switch (c) {case ' {': Case ' [': status = 1;            Break                Case ': ': status = 2;            Break  Case ', ': status = 3;              Break                Case '} ': Case '] ': status = 4;        Break    } return status;        }//indent private static String gettab (int level) {StringBuilder SB = new StringBuilder ();        for (int i = 0; I < level; i++) {Sb.append ("");    } return sb.tostring (); }}

Execution results

[    {        "name": "wen",        "age": 12,           "flag": true,        "job": [            {                "name":"java"            }, {                "name": "c++"            }        ]    }, {        "name": "yun",        "age": 13,        "flag": false    }]

JSON string formatting