fastjson @JSONField 自定义序列化、反序列化

落日映苍穹つ 2023-02-27 13:56 4阅读 0赞

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### fastjson 自定义序列化、反序列化 ###

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**相关类与接口**

**ObjectSerializer**

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

**ObjectDeserializer**

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

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**示例**

**CustomSerializer：序列化类**

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

**CustomDeserializer：反序列化类**

public class CustomDeserializer implements ObjectDeserializer {
    
        @Override
        @SuppressWarnings("unchecked")
        public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
            if (type.getTypeName().contains("String")){
                String text=(String)parser.parse(fieldName);
    
                return (T)("hello "+text.split(" ")[1]);
            }
    
            return (T)parser.parse(fieldName);
        }
    
        @Override
        public int getFastMatchToken() {
            return 0;
        }
    }

**Test3：测试类**

@Data
    class Student{
    
        private String id;
    
        @JSONField(serializeUsing = CustomSerializer.class,deserializeUsing = CustomDeserializer.class)
        private String name;
        private Integer age;
    }
    
    public class Test3 {
    
        public static void main(String[] args){
            Student student=new Student();
            student.setId("2");
            student.setName("瓜田李下");
            student.setAge(20);
    
            String jsonString=JSON.toJSONString(student);
            System.out.println(jsonString);
    
            Student s=JSON.parseObject(jsonString,Student.class);
            System.out.println(s);
        }
    }

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**控制台输出**

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