spring boot 格式化bigdecimal为小数点2位字符串

package cn.piian.common.utils;


import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.math.BigDecimal;

public class TwoDecimalPlacesSerialize extends JsonSerializer<BigDecimal> {

    @Override
    public void serialize(BigDecimal bigDecimal, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
        if (bigDecimal != null) {
            jsonGenerator.writeString(bigDecimal.setScale(2, BigDecimal.ROUND_HALF_DOWN) + "");
        } else {
            jsonGenerator.writeString("");
        }
    }
}

@Data
public class OrderCommissionVo {
    @JsonSerialize(using = TwoDecimalPlacesSerialize.class)
    private BigDecimal total;
}

全局使用

@Configuration
public class MyWebConfig implements WebMvcConfigurer {
    @Value("${spring.jackson.date-format}")
    String format;
    @Bean
    Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> {
          	// 全局bigdecimal类型的转换
            builder.serializerByType(BigDecimal.class, new CustomDecimalSerializer());
            // 时间转换，通过设置环境
            builder.serializerByType(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(format)));
        };
    }
}