全局配置

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.math.BigDecimal;
import java.time.LocalDateTime;/*** @author Lux Sun* @date 2023/8/27*/
@Configuration
public class MyObjectMapperConfig {@Beanpublic ObjectMapper objectMapper() {ObjectMapper objectMapper = new ObjectMapper();// 设置序列化时忽略为null的字段objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);// 注册自定义的BigDecimalSerializerobjectMapper.registerModule(new SimpleModule().addSerializer(BigDecimal.class, new BigDecimalSerializerConfig()).addSerializer(LocalDateTime.class, new LocalDateTimeSerializerConfig()));return objectMapper;}
}

BigDecimal 数据类型

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.szqy.common.domain.basic.OpenTime;
import java.io.IOException;
import java.math.BigDecimal;public class BigDecimalSerializerConfig extends JsonSerializer<BigDecimal> {@Overridepublic void serialize(BigDecimal value, JsonGenerator gen, SerializerProvider serializers) throws IOException {if (value != null) {// 设置保留两位小数，并保留末尾的".00"Object currentValue = gen.getCurrentValue();String formattedValue = value.setScale(2, BigDecimal.ROUND_HALF_UP).toString();if (currentValue instanceof OpenTime) {// 设置保留两位小数，并去除末尾的".00"formattedValue = value.setScale(2, BigDecimal.ROUND_HALF_UP).stripTrailingZeros().toPlainString();}gen.writeString(formattedValue);}}
}

LocalDateTime 数据类型

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;public class LocalDateTimeSerializerConfig extends JsonSerializer<LocalDateTime> {private final DateTimeFormatter dateTimeFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");@Overridepublic void serialize(LocalDateTime dateTime, JsonGenerator generator, SerializerProvider sp)throws IOException {String formattedDateTime = dateTime.format(dateTimeFormat);generator.writeString(formattedDateTime);}
}