fastjson parseProcess 自定义反序列化

朴灿烈づ我的快乐病毒、 2023-02-28 01:44 21阅读 0赞

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### fastjson parseProcess 自定义反序列化 ###

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**相关类与接口**

**ParseProcess**

public interface ParseProcess {
    
    }

**ExtraProcess：解析存储多余字段**

public interface ExtraProcessor extends ParseProcess {
    
        void processExtra(Object object, String key, Object value);
    }

**ExtraTypeProcess：解析多余字段的属性**

public interface ExtraTypeProvider extends ParseProcess {
    
        Type getExtraType(Object object, String key);
    }

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**示例**

@Data
    class Book{
    
        private String id;
        private String name;
        private Double price;
    
        private Map<String,Object> attributes=new HashMap<>();
    }
    
    class CustomParseProcess implements ExtraProcessor, ExtraTypeProvider{
    
        private List<String> keys= Arrays.asList("id","name","price");
    
        @Override
        public void processExtra(Object object, String key, Object value) {
            Book book=(Book) object;
    
            if (!keys.contains(key)){
                book.getAttributes().put(key,value);
            }
        }
    
        @Override
        public Type getExtraType(Object object, String key) {
            if (key.equals("desc")){
                return String.class;
            }
    
            return Object.class;
        }
    }
    
    public class Test6 {
    
        public static void main(String[] args){
            String jsonString="{" +
                    "\"id\": \"2\","
                    +"\"name\": \"瓜田李下\","
                    +"\"price\": \"6d\","
                    +"\"desc\":\"这是书\""+
                    "}";
    
            Book book= JSON.parseObject(jsonString,Book.class,new CustomParseProcess());
            System.out.println(book);
        }
    }

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**控制台输出**

Book(id=2, name=瓜田李下, price=6.0, attributes={desc=这是书})