BigDecimal “0E-8” 科学计数序列化前端 java mybatis

向右看齐 2024-03-22 12:12 8阅读 0赞

### 省流： ###

BigDecimal result = ....
    
    //需要这行代码
    String resultStr = result.toString();
    
    //如果要去掉小数点后的0
    String resultStr = result.stripTrailingZeros().toPlainString();

### 通过注解 ###

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 CustomerBigDecimalSerialize extends JsonSerializer<BigDecimal> {
        @Override
        public void serialize(BigDecimal value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
            if(null != value) {
            	//返回到前端的数据若为数字类型,前端接收有可能丢失精度,所以需要转成字符串
    			//gen.writeNumber(value.stripTrailingZeros());
                gen.writeString(value.stripTrailingZeros().toPlainString());
                //stripTrailingZeros().toPlainString()是去除小数点后的0
            }else {
                //若为null，则写null
                gen.writeNull();
            }
        }
    }

//在出参对象的字段上加上@JsonSerialize注解
      @JsonSerialize(using = CustomerBigDecimalSerialize.class)
      private BigDecimal assets;

[Java返回前端Bigdecimal类型数据时“0E-8“及小数点多余0的问题][Java_Bigdecimal_0E-8_0]

[Mybatis decimal映射到Java BigDecimal类型 科学计数法][Mybatis decimal_Java BigDecimal_]

[bigdecimal去除末尾多余的0 ,stripTrailingZeros()科学计数法解决][bigdecimal_0 _stripTrailingZeros]

[Java_Bigdecimal_0E-8_0]: https://huaweicloud.csdn.net/638f0f6edacf622b8df8e117.html
[Mybatis decimal_Java BigDecimal_]: https://blog.csdn.net/qq_34369569/article/details/115750430
[bigdecimal_0 _stripTrailingZeros]: https://blog.csdn.net/xingxiupaioxue/article/details/78088337