关于springboot:实体类BigDecimal精度控制

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 BigDecimalSerializer extends JsonSerializer<BigDecimal> {    public BigDecimalSerializer() {    }    public void serialize(BigDecimal value, JsonGenerator gen, SerializerProvider serializers) throws IOException {        if (value != null) {            BigDecimal number = value.setScale(2, 4);            gen.writeNumber(number);        } else {            gen.writeNumber(value);        }    }}class    A{    @JsonSerialize(        using = BigDecimalSerializer.class    )    @ApiModelProperty(value = "价格下限")    private BigDecimal maxPrice;}