Conversion between Java object JSON (JSON-LIB)

Here is a brief introduction to how to use the Json-lib Toolkit to complete the transformation between a Java object (or collection) and a JSON object (or collection) ~

1. Translating Java objects into JSON (creating JSON)

Key class: Jsonobject Jsonobject = jsonobject.from (Object obj);

Instructions for use: Just pass the Java object into the method, then you can get a jsonobject, then you can directly json.tostring (); Output json~

Example:

    @Test    publicvoidthrows  Exception {        new Employee ("Zhangsan", "n");         = Jsonobject.fromobject (employee);        System.out.println (Jsonobject.tostring ());    }

Output Result:

As you can see from the above output, the order of the properties of the JSON object Jsonobject output is unordered ~

2. String converted to Java object (parsing JSON)

Key class: Jsonobject JSON = new Jsonobject (String jsonstring);

Json.get (String key); Gets the value according to key. A key is a property name for a Java object, and value is the property value

Instructions for use: First, the JSON string is passed into the constructor of the Jsonobject object, a Jsonobject object is obtained, and the corresponding data is obtained through the object to construct a Java object.

Example:

    @Test    publicvoid  Testparsejson () {        = "{\" age\ ": \" 12\ ", \" name\ ": \ "Zhangsan\"} ";         New jsonobject (). Fromobject (jsonstring);        System.out.println (Json.get ("name"));        System.out.println (Json.get ("age"));    

Output Result:

ZhangSan12

Appendix: Specific implementation of employee code

 Public classEmployee {PrivateString name; PrivateString age;  PublicString GetName () {returnname; }     PublicString getage () {returnAge ; }     Public voidsetName (String name) { This. Name =name; }     Public voidsetage (String age) { This. Age =Age ; }     PublicEmployee (string name, String age) {Super();  This. Name =name;  This. Age =Age ; }     PublicEmployee () {Super(); } @Override PublicString toString () {return"[Name=" +name+ ", age=" +age+ "]"; }}

Extended reading:

Conversion between the Java collection JSON collection

Conversion between Java object JSON (JSON-LIB)