How to convert a String to JsonObject using gson library

Question

Please advice how to convert a String to JsonObject using gson library    What I unsuccesfully do    String string    abcde   Gson gson   new Gson    JsonObject json   new JsonObject    json   gson toJson string      Can t convert String to JsonObject

User · Answer

Gson gson   new Gson    YourClass yourClassObject   new YourClass    String jsonString   gson toJson yourClassObject

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String emailData     to    abc abctest com   subject   User details   body    The user has completed his training        Java model class public class EmailData       public String to      public String subject      public String body       Final Data Gson gson   new Gson      EmailData emaildata   gson fromJson emailData  EmailData class

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String string    abcde      The String which Need To Be Converted JsonObject convertedObject   new Gson   fromJson string  JsonObject class     I do this  and it worked

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Looks like the above answer did not answer the question completely   I think you are looking for something like below   class TransactionResponse       String Success  Message     List lt Response gt  Response      TransactionResponse   new Gson   fromJson response  TransactionResponse class     where my response is something like this     Success  false  Message   Invalid access token    Response  null    As you can see  the variable name should be same as the Json string representation of the key in the key value pair  This will automatically convert your gson string to JsonObject

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You don t need to use JsonObject  You should be using Gson to convert to from JSON strings and your own Java objects   See the Gson User Guide       Serialization   Gson gson   new Gson    gson toJson 1                        prints 1 gson toJson  abcd                    prints  abcd  gson toJson new Long 10              prints 10 int   values     1    gson toJson values                   prints  1         Deserialization   int one   gson fromJson  1   int class   Integer one   gson fromJson  1   Integer class   Long one   gson fromJson  1   Long class   Boolean false   gson fromJson  false   Boolean class   String str   gson fromJson    abc     String class   String anotherStr   gson fromJson     abc      String class

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Note that as of Gson 2 8 6  instance method JsonParser parse has been deprecated and replaced by static method JsonParser parseString   JsonObject jsonObject   JsonParser parseString json  getAsJsonObject

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To do it in a simpler way  consider below   JsonObject jsonObject    new JsonParser    parse json  getAsJsonObject

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JsonObject jsonObject    JsonObject  new JsonParser   parse  YourJsonString

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You can convert it to a JavaBean if you want using    Gson gson   new GsonBuilder   setPrettyPrinting   create     gson fromJson jsonString  JavaBean class    To use JsonObject  which is more flexible  use the following   String json       Success   true   Message     Invalid access token       JsonParser jsonParser   new JsonParser    JsonObject jo    JsonObject jsonParser parse json   Assert assertNotNull jo   Assert assertTrue jo get  Success   getAsString       Which is equivalent to the following   JsonElement jelem   gson fromJson json  JsonElement class   JsonObject jobj   jelem getAsJsonObject

[java] How to convert a String to JsonObject using gson library

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