java - Jackson Json to POJO mapping -


i little lost in creating mapping jackson. json has following structure

    {   "d": {     "__metadata": {       "uri": "https://apisalesdemo8.successfactors.com:443/odata/v2/jobapplication(1463l)",       "type": "sfodata.jobapplication"     },     "lastname": "k",     "address": "123 main street",     "cellphone": "12345",     "firstname": "katrin",     "city": "anytown",     "country": "united states",     "custappattachment": {       "results": [         {           "__metadata": {             "uri": "https://apisalesdemo8.successfactors.com:443/odata/v2/attachment(1188l)",             "type": "sfodata.attachment"           },           "fileextension": "jpeg",           "filename": "hp-hero-img.jpeg",           "filecontent": "/9j/4aa"         },         {           "__metadata": {             "uri": "https://apisalesdemo8.successfactors.com:443/odata/v2/attachment(1189l)",             "type": "sfodata.attachment"           },           "fileextension": "jpeg",           "filename": "hp-content-bkgd-img.jpeg",           "filecontent": "/9j/4aaqsk"         }]}}}

i find lot of tutorials handling arrays, fail first token "d". , "__metadata" token not needed @ all.

i created pojo containing attributes lastname etc. , collection attachments. code fails @ token "d" or "__metadata"

public class responsedataobject {       private string lastname;     private string address;     private string cellphone;     private string firstname;     private string city;     private string country;     private list<attachment> attachments = new arraylist<>();     .....getters , setters

and jackson reader

    objectreader objectreader =     mapper.readerfor(responsedataobject.class);     responsedataobject dataobject = objectreader.readvalue(file);

any hints appreciated.

regards mathias

you need ignore properties, not present in pojo. set following property in deserializationfeature objectmapper:

// version 1.x        mapper.configure(deserializationconfig.feature.fail_on_unknown_properties, false); // newer versions mapper.configure(deserializationfeature.fail_on_unknown_properties, false)

deserialization code:

objectmapper mapper = new objectmapper(); mapper.configure(deserializationfeature.fail_on_unknown_properties, false); mapper.configure(deserializationfeature.unwrap_root_value, true); responsedataobject dataobject = mapper.readvalue(file, responsedataobject.class);

and add annotation responsedataobject class:

@jsonrootname(value = "d") class responsedataobject {

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