java返回json设置自定义的格式

• 使用注解@JsonSerialize(using = CustomPriceSerialize.class)

• 创建自定义的格式化类(可为内部类)

  
  /**
   * 设置默认返回的小数类型(0.01 元)
   */
  class CustomPriceSerialize extends JsonSerializer<BigDecimal> {
      private DecimalFormat df = new DecimalFormat("#0.00");
  
      public CustomPriceSerialize() {
      }
  
      public void serialize(BigDecimal value, JsonGenerator jgen, SerializerProvider provider) throws IOException {
          jgen.writeString(this.df.format(value));
      }
  }