package cn.besteam.common.util;

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

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

/**
 * 只保留一位小数
 *
 * @author chenqilong
 * @since 2020/3/13
 */
public class CustomDecimalSerialize extends JsonSerializer<BigDecimal> {

    private DecimalFormat df = new DecimalFormat("##.0");

    @Override
    public void serialize(BigDecimal value, JsonGenerator gen, SerializerProvider serializers) throws IOException, JsonProcessingException {

        if (value != null) {
            gen.writeString(df.format(value));
        }
    }

}