傑克遜系列化怎麼不顯示類和字段名

Question

是否有使用傑克遜的方式，在序列化過程中，要不打印 1.類名（構造函數名稱） 2.字段名（是指只打印字段值）

public class Test 
{ 


    private static final Logger LOG = Logger.getLogger(Test.class); 

    /** 
    * @param args 
    * @throws IOException 
    * @throws JsonMappingException 
    * @throws JsonGenerationException 
    */ 
    public void work(final ObjectMapper mapper) throws JsonGenerationException, JsonMappingException, IOException 
    { 
     RestrictedAndVat restrictedAndVat = new RestrictedAndVat(); 
     restrictedAndVat.setRate(BigDecimal.valueOf(20)); 
     restrictedAndVat.setRestricted(true); 
     final CountryRestrictedAndVat countryRestrictedAndVat1 = new CountryRestrictedAndVat(); 
     countryRestrictedAndVat1.setCountryCode("UK"); 
     countryRestrictedAndVat1.setRestrictedAndVat(restrictedAndVat); 

     final ProductCountryRestrictedAndVat productCountryRestrictedAndVat = new ProductCountryRestrictedAndVat(); 
     final List<CountryRestrictedAndVat> list = new ArrayList<CountryRestrictedAndVat>(); 
     list.add(countryRestrictedAndVat1); 

     productCountryRestrictedAndVat.setCountryRestrictedAndVat(list); 
     LOG.info("Json:" + serialiseJson(productCountryRestrictedAndVat, mapper)); 

    } 

    private <DATA> String serialiseJson(final DATA pojoData, final ObjectMapper mapper) 
      throws JsonGenerationException, JsonMappingException, IOException 
    { 

     final StringWriter jsonWriter = new StringWriter(); 
     mapper.writeValue(jsonWriter, pojoData); 
     return jsonWriter.toString().trim(); 
    } 

} 

public class ProductCountryRestrictedAndVat 
{ 


    @JsonProperty(value = "crv", required = false) 
    private List<CountryRestrictedAndVat> countryRestrictedAndVat; 

    /** 
    * @return the countryRestrictedAndVat 
    */ 
    public List<CountryRestrictedAndVat> getCountryRestrictedAndVat() 
    { 
     return countryRestrictedAndVat; 
    } 

    /** 
    * @param countryRestrictedAndVat 
    *   the countryRestrictedAndVat to set 
    */ 
    public void setCountryRestrictedAndVat(final List<CountryRestrictedAndVat> countryRestrictedAndVat) 
    { 
     this.countryRestrictedAndVat = countryRestrictedAndVat; 
    } 




} 


    public class RestrictedAndVat 
    { 


     @JsonProperty("vat") 
     @JsonInclude(JsonInclude.Include.NON_NULL) 
     private BigDecimal rate; 

     @JsonProperty("restricted") 
     private boolean restricted; 

     /** 
     * @return the rate 
     */ 
     public BigDecimal getRate() 
     { 
      return rate; 
     } 

     /** 
     * @param rate 
     *   the rate to set 
     */ 
     public void setRate(final BigDecimal rate) 
     { 
      this.rate = rate; 
     } 

     /** 
     * @return the restricted 
     */ 
     public boolean isRestricted() 
     { 
      return restricted; 
     } 

     /** 
     * @param restricted 
     *   the restricted to set 
     */ 
     public void setRestricted(final boolean restricted) 
     { 
      this.restricted = restricted; 
     } 

    } 

    public class CountryRestrictedAndVat 
    { 



     @JsonProperty("country") 
     private String countryCode; 


     @JsonProperty(value = "rv", required = false) 
     private RestrictedAndVat restrictedAndVat; 


     /** 
     * @return the countryCode 
     */ 
     public String getCountryCode() 
     { 
      return countryCode; 
     } 


     /** 
     * @param countryCode 
     *   the countryCode to set 
     */ 
     public void setCountryCode(final String countryCode) 
     { 
      this.countryCode = countryCode; 
     } 


     /** 
     * @return the restrictedAndVat 
     */ 
     public RestrictedAndVat getRestrictedAndVat() 
     { 
      return restrictedAndVat; 
     } 


     /** 
     * @param restrictedAndVat 
     *   the restrictedAndVat to set 
     */ 
     public void setRestrictedAndVat(final RestrictedAndVat restrictedAndVat) 
     { 
      this.restrictedAndVat = restrictedAndVat; 
     } 

    } 

輸出爲： JSON：{ 「CRV」：[{ 「國家」： 「英國」， 「RV」：{ 「VAT」：20， 「限制」：真正的}}]}

我希望它是： Json：[{「UK」：{「vat」：20，「restricted」：true}}]

Answer 1

是的，可以使用自定義序列化程序。

標註您CountryRestrictedAndVat類

@JsonSerialize(using = CountryRestrictedAndVatSerializer.class) 

取出@JsonProperty註釋。

，寫串行：

public class CountryRestrictedAndVatSerializer extends JsonSerializer<CountryRestrictedAndVat> { 
    @Override 
    public void serialize(CountryRestrictedAndVat value, 
          JsonGenerator gen, 
          SerializerProvider serializers) throws IOException, JsonProcessingException { 
     gen.writeStartObject(); 
     gen.writeObjectField(value.getCountryCode(), value.getRestrictedAndVat()); 
     gen.writeEndObject(); 
    } 
}