package com.xcong.excoin.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.text.DecimalFormat;
/**
 * Double保留两位小数
 * 
 */
public class DoubleTwoSerializer extends JsonSerializer<Double> {
 
    private DecimalFormat df = new DecimalFormat("0.00");
 
    /**
     * 小数保留2位返回给前端序列化器
     * @param data
     * @param jsonGenerator
     * @param serializerProvider
     * @throws IOException
     */
    @Override
    public void serialize(Double data, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
            throws IOException {
        if (data != null) {
            if (data == 0) {
                jsonGenerator.writeString("0");
            } else {
                jsonGenerator.writeString(df.format(data));
            }
 
        }
    }

}