java - Jackson custom date serializer -

i need set format class' date serialization. have version of jackson, doesn't have @jsonformat. that's why wrote custom class:

public class cdjsondateserializer extends jsonserializer<date>{  @override public void serialize(date date, jsongenerator jsongenerator, serializerprovider provider) throws ioexception {     simpledateformat dateformat = new simpledateformat("mm/dd/yyyy");     string datestring = dateformat.format(date);     jsongenerator.writestring(datestring); } 

}

and used it:

@jsonserialize(using = cdjsondateserializer.class) private date startdate; 

but, have fields have different date's formats , don't want create classes serialization. can add needed formats constants cdjsondateserializer class , set needed format annotation @jsonserialize ? this:

@jsonserialize(using = cdjsondateserializer.class, cdjsondateserializer.first_format).

after answer below:

it works after corrections. i've changed way of getting annotation in createcontextual method:

@override public jsonserializer createcontextual(serializationconfig serializationconfig, beanproperty beanproperty) {     return new customdateserializer(beanproperty.getannotation(jsondateformat.class).value()); } 

and i've added @jacksonannotation created new annotation jsondateformat:

@retention(retentionpolicy.runtime) @jacksonannotation public @interface jsondateformat {    string value(); } 

if cannot use @jsonformat jackson 2, i'd recommend introduce own custom annotation contain format field. serailizer should implement contextualserializer interface access annotation value.

here example jackson 1.9.x:

public class jacksondateformat {     @retention(retentionpolicy.runtime)     public static @interface myjsonformat {         string value();     }      public static class bean {         @myjsonformat("dd.mm.yyyy") @jsonserialize(using = mydateserializer.class)         public final date date1;          @myjsonformat("yyyy-mm-dd") @jsonserialize(using = mydateserializer.class)         public final date date2;          public bean(final date date1, final date date2) {             this.date1 = date1;             this.date2 = date2;         }     }      public static class mydateserializer extends jsonserializer<date>             implements contextualserializer {         private final string format;          private mydateserializer(final string format) {this.format = format;}          public mydateserializer() {this.format = null;}          @override         public void serialize(                 final date value, final jsongenerator jgen, final serializerprovider provider)                 throws ioexception {             jgen.writestring(new simpledateformat(format).format(value));         }          @override         public jsonserializer createcontextual(                 final serializationconfig serializationconfig, final beanproperty beanproperty)                 throws jsonmappingexception {             final annotatedelement annotated = beanproperty.getmember().getannotated();             return new mydateserializer(annotated.getannotation(myjsonformat.class).value());         }     }      public static void main(string[] args) throws ioexception {         final objectmapper mapper = new objectmapper();         final bean value = new bean(new date(), new date());         system.out.println(mapper                         .writerwithdefaultprettyprinter()                         .writevalueasstring(value));     } } 

output:

{   "date1" : "02.12.2014",   "date2" : "2014-12-02" } 

if have access objectmapper can register custom serializer date types, want longer need put @jsonserialize annotation.

here example:

final objectmapper mapper = new objectmapper(); final simplemodule module = new simplemodule("", version.unknownversion()); module.addserializer(date.class, new mydateserializer(null)); mapper.registermodule(module);