JSON雜記

1. Java後臺long類型數據返回給前端精度丟失，建議解決方案：(將long轉爲String後傳給前端)

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

import java.math.BigInteger;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

@Configuration
public class JacksonConfig {

	@Bean
	public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
		Jackson2ObjectMapperBuilderCustomizer jumbo = new Jackson2ObjectMapperBuilderCustomizer() {
			@Override
			public void customize(Jackson2ObjectMapperBuilder jacksonObjectMapperBuilder) {
				jacksonObjectMapperBuilder.serializerByType(BigInteger.class, ToStringSerializer.instance);
				jacksonObjectMapperBuilder.serializerByType(Long.class, ToStringSerializer.instance);
			}
		};
		return jumbo;
	}

}