1、局部处理
(1)在相应字段上加@JsonFormat @JsonFormat(shape = JsonFormat.Shape.STRING)
(2)在相应字段上加@JsonSerialize
@JsonSerialize(using= ToStringSerializer.class)
2、全局处理
(1)ToStringSerializer 配置类 @Configuration public class JacksonConfig { @Bean public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) { ObjectMapper objectMapper = builder.createXmlMapper(false).build(); // 全局配置序列化返回 JSON 处理 SimpleModule simpleModule = new SimpleModule(); // 将使用String来序列化BigDecimal类型 simpleModule.addSerializer(BigDecimal.class, ToStringSerializer.instance); objectMapper.registerModule(simpleModule); return objectMapper; } }
(2)自定义序列化器 //自定义序列化类 @JacksonStdImpl class BigDecimalToStringSerializer extends ToStringSerializer { public final static BigDecimalToStringSerializer instance = new BigDecimalToStringSerializer(); public BigDecimalToStringSerializer() { super(Object.class); } public BigDecimalToStringSerializer(Class<?> handledType) { super(handledType); } @Override public boolean isEmpty(SerializerProvider prov, Object value) { if (value == null) { return true; } String str = ((BigDecimal) value).stripTrailingZeros().toPlainString(); return str.isEmpty(); } @Override public void serialize(Object value, JsonGenerator gen, SerializerProvider provider) throws IOException { gen.writeString(((BigDecimal) value).stripTrailingZeros().toPlainString()); // 如果要求所有BigDecimal保留两位小数,可以这么写: // gen.writeString(((BigDecimal) value).setScale(2, RoundingMode.HALF_UP) // .stripTrailingZeros().toPlainString()); } @Override public void serializeWithType(Object value, JsonGenerator gen, SerializerProvider provider, TypeSerializer typeSer) throws IOException { // no type info, just regular serialization serialize(value, gen, provider); } } //配置类 @Configuration public class JacksonConfig { @Bean public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) { ObjectMapper objectMapper = builder.createXmlMapper(false).build(); // 全局配置序列化返回 JSON 处理 SimpleModule simpleModule = new SimpleModule(); // 将使用String来序列化BigDecimal类型 simpleModule.addSerializer(BigDecimal.class, BigDecimalToStringSerializer.instance); objectMapper.registerModule(simpleModule); return objectMapper; } }
参考:https://www.jb51.net/article/250548.htm
标签:SpringBoot,value,class,丢失,序列化,public,objectMapper,BigDecimal From: https://www.cnblogs.com/wongzzh/p/16666295.html