fastjson @JSONField 自定义序列化、反序列化

落日映苍穹つ 2023-02-27 13:56 148阅读 0赞

fastjson 自定义序列化、反序列化

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相关类与接口

ObjectSerializer

  1. public interface ObjectSerializer {
  3.     void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException;
  4. }

ObjectDeserializer

  1. public interface ObjectDeserializer {
  3.     <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName);
  5.     int getFastMatchToken();
  6. }

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示例

CustomSerializer：序列化类

  1. public class CustomSerializer implements ObjectSerializer {
  3.     @Override
  4.     public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
  5.         serializer.write("gtlx "+object);
  6.     }
  7. }

CustomDeserializer：反序列化类

  1. public class CustomDeserializer implements ObjectDeserializer {
  3.     @Override
  4.     @SuppressWarnings("unchecked")
  5.     public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
  6.         if (type.getTypeName().contains("String")){
  7.             String text=(String)parser.parse(fieldName);
  9.             return (T)("hello "+text.split(" ")[1]);
  10.         }
  12.         return (T)parser.parse(fieldName);
  13.     }
  15.     @Override
  16.     public int getFastMatchToken() {
  17.         return 0;
  18.     }
  19. }

Test3：测试类

  1. @Data
  2. class Student{
  4.     private String id;
  6.     @JSONField(serializeUsing = CustomSerializer.class,deserializeUsing = CustomDeserializer.class)
  7.     private String name;
  8.     private Integer age;
  9. }
  11. public class Test3 {
  13.     public static void main(String[] args){
  14.         Student student=new Student();
  15.         student.setId("2");
  16.         student.setName("瓜田李下");
  17.         student.setAge(20);
  19.         String jsonString=JSON.toJSONString(student);
  20.         System.out.println(jsonString);
  22.         Student s=JSON.parseObject(jsonString,Student.class);
  23.         System.out.println(s);
  24.     }
  25. }

***************

控制台输出

  1. {"age":20,"id":"2","name":"gtlx 瓜田李下"}
  2. Student(id=2, name=hello 瓜田李下, age=20)

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