Tool classes that convert any format to JSON data format

Java's tool class for converting any format to JSON data format

Package Org.sjw.utils;import Java.beans.introspectionexception;import Java.beans.introspector;import Java.beans.propertydescriptor;import Java.util.list;import Java.util.map;import Java.util.Set;public class        jsonutils {public static String Stringtojson (string s) {if (s = = null) {return Nulltojson ();        } StringBuilder sb = new StringBuilder ();            for (int i = 0; i < s.length (); i++) {Char ch = s.charat (i);                Switch (CH) {case ' "': Sb.append (" \\\ ");            Break                Case ' \ \ ': Sb.append ("\\\\");            Break                Case ' \b ': sb.append ("\\b");            Break                Case ' \f ': Sb.append ("\\f");            Break                Case ' \ n ': sb.append ("\\n");            Break                Case ' \ R ': Sb.append ("\\r");            Break Case ' \ t ': Sb.append ("\\t ");            Break                Case '/': Sb.append ("\\/");            Break Default:if (ch >= ' \u0000 ' && ch <= ' \u001f ') {String SS = Integer.tohex                    String (CH);                    Sb.append ("\\u");                    for (int k = 0; k < 4-ss.length (); k++) {sb.append (' 0 ');                } sb.append (Ss.touppercase ());                } else {sb.append (ch);    }}} return Sb.tostring ();    } public static String Nulltojson () {return "";        public static String Objecttojson (Object obj) {StringBuilder json = new StringBuilder ();        if (obj = = null) {json.append ("\" \ "");        } else if (obj instanceof number) {Json.append (Numbertojson ((number) obj)); } else if (obj instanceof Boolean) {Json.append (Booleantojson (Boolean) OBj));        } else if (obj instanceof String) {json.append ("\" "). Append (Stringtojson (obj.tostring ())). Append (" \ "");        } else if (obj instanceof object[]) {Json.append (Arraytojson ((object[)) obj);        } else if (obj instanceof List) {json.append (Listtojson ((list<?>) obj));        } else if (obj instanceof Map) {json.append (Maptojson (map<?,? >) obj);        } else if (obj instanceof Set) {json.append (Settojson ((set<?>) obj));        } else {json.append (Beantojson (obj));    } return json.tostring ();    } public static String Numbertojson (number number) {return number.tostring ();    } public static String Booleantojson (Boolean bool) {return bool.tostring (); }/** * @param bean * Bean Object * @return String * * public static string Beantojson (object b        EAN) {StringBuilder json = new StringBuilder (); Json.append ("{");        propertydescriptor[] props = null; try {props = Introspector.getbeaninfo (Bean.getclass (), object.class). Getpropertydescriptor        S (); } catch (Introspectionexception e) {} if (props! = null) {for (int i = 0; i < props.length;                    i++) {try {String name = Objecttojson (Props[i].getname ());                    String value = Objecttojson (Props[i].getreadmethod (). Invoke (bean));                    Json.append (name);                    Json.append (":");                    Json.append (value);                Json.append (",");        } catch (Exception e) {}} Json.setcharat (Json.length ()-1, '} ');        } else {json.append ("}");    } return json.tostring (); }/** * @param list * List Object * @return String */public static string Listtojson (list< ?&Gt        List) {StringBuilder json = new StringBuilder ();        Json.append ("["); if (list = null && list.size () > 0) {for (Object obj:list) {json.append (Objectto                Json (obj));            Json.append (",");        } Json.setcharat (Json.length ()-1, '] ');        } else {json.append ("]");    } return json.tostring ();  }/** * @param array * Object Arrays * @return String */public static string Arraytojson (object[]        Array) {StringBuilder json = new StringBuilder ();        Json.append ("["); if (array = null && array.length > 0) {for (Object Obj:array) {json.append (objec                Ttojson (obj));            Json.append (",");        } Json.setcharat (Json.length ()-1, '] ');        } else {json.append ("]");    } return json.tostring ();     }/** * @param map * Map Object* @return String */public static string Maptojson (map<?,? > Map) {StringBuilder json = new Stringbui        Lder ();        Json.append ("{"); if (map! = null && map.size () > 0) {for (Object Key:map.keySet ()) {Json.append (ob                Jecttojson (key));                Json.append (":");                Json.append (Objecttojson (Map.get (key));            Json.append (",");        } Json.setcharat (Json.length ()-1, '} ');        } else {json.append ("}");    } return json.tostring ();  }/** * @param set * Collection Object * @return String */public static string Settojson (set<?>        Set) {StringBuilder json = new StringBuilder ();        Json.append ("["); if (set! = null && set.size () > 0) {for (Object obj:set) {json.append (objecttojso                N (obj));            Json.append (","); } Json.setcharat (Json.lengtH ()-1, '] ');        } else {json.append ("]");    } return json.tostring (); }}

Tool classes that convert any format to JSON data format