JAVA 金额自动除以100,精确到分

package net.crisps.cloud.order.commons.staff.util;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import org.springframework.stereotype.Component;

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

1.编写一个工具类继承 JsonSerializer

@Component
public class MoneyUtils extends JsonSerializer<Long> {

    @Override
    public void serialize(Long aLong, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
        if (Objects.nonNull(aLong)) {
            String format = getString(aLong);
            jsonGenerator.writeString(format);
        } else {//这个分支不要忘记了，否则将不输出这个属性的值
            aLong = 0L;
            String format = getString(aLong);
            jsonGenerator.writeString(format);
        }
    }

    private String getString(Long aLong) {
        DecimalFormat df = new DecimalFormat("0.00");
        return df.format(aLong.doubleValue() / 100);
    }
}

2. 再返回的实体上加上注解

3. 然后看返回数据