Using Jackson to manipulate JSON

1. Introduction of Jasckson-core.jar,jackson-annotations.jar and Jackson-databind.jar

2. Because no JSON data is fetched and submitted from HTTP, do a data class instead

1 classWxjson {2      PublicString Getaccess_token () {3         returnAccess_token;4     }5 6      Public voidSetaccess_token (String access_token) {7          This. Access_token =Access_token;8     }9 Ten      Public intgetexpires_in () { One         returnexpires_in; A     } -  -      Public voidSetexpires_in (intexpires_in) { the          This. expires_in =expires_in; -     } -  -      PublicString Getrefresh_token () { +         returnRefresh_token; -     } +  A      Public voidSetrefresh_token (String refresh_token) { at          This. Refresh_token =Refresh_token; -     } -  -      PublicString Getopenid () { -         returnOpenID; -     } in  -      Public voidSetopenid (String OpenID) { to          This. OpenID =OpenID; +     } -  the      PublicString Getscope () { *         returnscope; $     }Panax Notoginseng  -      Public voidsetscope (String scope) { the          This. Scope =scope; +     } A  the      PublicString Getunionid () { +         returnUnionid; -     } $  $      Public voidSetunionid (String unionid) { -          This. Unionid =Unionid; -     } the  -     PrivateString Access_token;Wuyi     Private intexpires_in; the     PrivateString Refresh_token; -     PrivateString OpenID; Wu     PrivateString scope; -     PrivateString Unionid; About}

3 The following first converts the data into JSON data in two ways, and then converts the converted JSON data back to the list object

1 ImportCom.fasterxml.jackson.databind.ObjectMapper;2 3 Importjava.io.IOException;4 Importjava.util.ArrayList;5 Importjava.util.List;6 7  Public classMain {8 9      Public Static voidMain (string[] args)throwsIOException {Ten  OneWxjson Wxjson =NewWxjson (); AObjectmapper mapper =NewObjectmapper (); -  -         //Convert a Java object to JSON theWxjson.setaccess_token ("Access_token"); -Wxjson.setexpires_in (7200); -Wxjson.setrefresh_token ("Refresh_token"); -Wxjson.setopenid ("OPENID"); +Wxjson.setscope ("SCOPE"); -Wxjson.setunionid ("O6_BMASDASDSAD6_2SGVT7HMZOPFL"); +String JSON =mapper.writevalueasstring (Wxjson); A System.out.println (JSON); at  -List<wxjson> wxjsons =NewArraylist<wxjson>(); - Wxjsons.add (Wxjson); -String jsonlist =mapper.writevalueasstring (wxjsons); - System.out.println (jsonlist); -  in  -Wxjson WxJson1 = Mapper.readvalue (JSON, Wxjson.class); toSystem.out.println (Wxjson1.getaccess_token () + "" +wxjson1.getexpires_in ()); +  -     } the}

Output results

1 {"Access_token": "Access_token", "expires_in": 7200, "Refresh_token": "Refresh_token", "OpenID": "OpenID", " Scope ":" Scope "," Unionid ":" O6_BMASDASDSAD6_2SGVT7HMZOPFL "}2 [{" Access_token ":" Access_token "," Expires_in ": 7200," Refresh_token ":" Refresh_token "," OpenID ":" OpenID "," Scope ":" Scope "," Unionid ":" O6_bmasdasdsad6_ 2SGVT7HMZOPFL "}]3 access_token 7200

Using Jackson to manipulate JSON