JAVA 金額自動除以100,精確到分

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.編寫一個工具類繼承 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 {//這個分支不要忘記了，否則將不輸出這個屬性的值
            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. 再返回的實體上加上注解

 

 

3. 然后看返回數據