POJO 有一个 byte[] 字段，但与之对应的 JSON 有 string 字段。 如何将字符串转换为字节[]？

Question

My POJO has the following structure:

class SomeName
{
       .... // some fields
       private byte[] message;
       ....
       .... // some functions
       public byte[] getMessage() 
       {
           return message;
       }
}

And my JSON file has the field named 'message' which has a String stored in it. Currently I am using ObjectMapper from com.fasterxml.jackson.databind.ObjectMapper . The syntax being

ObjectMapper mapper = new ObjectMapper();
SomeName myObjects = mapper.readValue(jsonData, new TypeReference<SomeName>() {});

Is there a way with this solution or an alternate solution (other than tampering the POJO or the JSON) for this?

Answer 1

You can do like this way using GSON Liberary. If you are not stick to jackson library. Hope you will get your answer from this part.

 public class JsonParse
 {
    public static void main(String... args)
    {
        Employee product = new Employee("JSON");
        Gson gson = new GsonBuilder().create(); 
        gson = new 
        GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
        String result = gson.toJson(product);
        System.out.println(result);
    }
 }

class Employee
{

  @Expose
  private byte [] name;

  public Employee(String name)
  {
     this.name = name.getBytes();
  }

}