JSON tutorial Series (3)-jsonobject filter settings

We often selectively filter out some of the property values when we switch between a JSON string and a Java object. For example, the following class:

1  Public class Person2 {3     PrivateString name;4     PrivateString address;5     PrivateString sex;6  7      PublicString getaddress ()8     {9         returnaddress;Ten     } One   A      Public voidsetaddress (String address) -     { -          This. Address =address; the     } -   -      PublicString getName () -     { +         returnname; -     } +   A      Public voidsetName (String name) at     { -          This. Name =name; -     } -   -      PublicString getsex () -     { in         returnsex; -     } to   +      Public voidsetsex (String sex) -     { the          This. Sex =sex; *     } $}

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What if I want to filter the address attribute?

Method One: Implement the Jsonstring interface

1 Importnet.sf.json.JSONString;2  Public classPersonImplementsjsonstring3 {4     PrivateString name;5     PrivateString sex;6     PrivateString address;7      PublicString tojsonstring ()8     {9         return"{\" name\ ": \" "+ name +" \ ", \" sex\ ": \" "+ Sex +" \ "}";Ten     } One      PublicString getaddress () A     { -         returnaddress; -     } the      Public voidsetaddress (String address) -     { -          This. Address =address; -     } +      PublicString getName () -     { +         returnname; A     } at      Public voidsetName (String name) -     { -          This. Name =name; -     } -      PublicString getsex () -     { in         returnsex; -     } to      Public voidsetsex (String sex) +     { -          This. Sex =sex; the     } * } $ ImportNet.sf.json.JSONObject;Panax Notoginseng  Public classTest { -  Public Static voidMain (String args[]) { thePerson person =NewPerson (); +Person.setname ("Swiftlet"); APerson.setsex ("Men"); thePerson.setaddress ("China"); +Jsonobject JSON =Jsonobject.fromobject (person); - System.out.println (json.tostring ()); $     } $}

View CodeMethod Two: Set the Jsonconfig instance to add or remove attributes that contain and need to be excluded.

1 ImportNet.sf.json.JSONObject;2 ImportNet.sf.json.JsonConfig;3  Public classTest4 {5      Public Static voidMain (String args[])6     {7Person person =NewPerson ();8Person.setname ("Swiftlet");9Person.setsex ("Men");TenPerson.setaddress ("China"); OneJsonconfig Jsonconfig =Newjsonconfig (); AJsonconfig.setexcludes (Newstring[] -{"Address" }); -Jsonobject JSON =Jsonobject.fromobject (person, jsonconfig); the System.out.println (json.tostring ()); -     } -}

View CodeMethod Three: Use the PropertyFilter instance to filter the properties.

1 ImportNet.sf.json.JSONObject;2 ImportNet.sf.json.JsonConfig;3 ImportNet.sf.json.util.PropertyFilter;4  Public classTest5 {6      Public Static voidMain (String args[])7     {8Person person =NewPerson ();9Person.setname ("Swiftlet");TenPerson.setsex ("Men"); OnePerson.setaddress ("China"); AJsonconfig Jsonconfig =Newjsonconfig (); -Jsonconfig.setjsonpropertyfilter (NewPropertyFilter () { -              Public Booleanapply (object source, String name, object value) the             { -                 returnSourceinstanceofPerson && name.equals ("Address"); -             } -         }); +Jsonobject JSON =Jsonobject.fromobject (person, jsonconfig); - System.out.println (json.tostring ()); +     } A}

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JSON tutorial Series (3)-jsonobject filter settings