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NumberUtil.parseNumber增加支持科学计数法（pr#4211@Github）

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Looly
2026-01-12 16:08:26 +08:00
parent 1426050b3b
commit 5d44fc1cc1
2 changed files with 22 additions and 1 deletions
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13
hutool-core/src/main/java/cn/hutool/v7/core/math/NumberParser.java
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@@ -21,6 +21,7 @@ import cn.hutool.v7.core.convert.ConvertUtil;
import cn.hutool.v7.core.text.CharUtil;
import cn.hutool.v7.core.text.StrUtil;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.DecimalFormat;
import java.text.NumberFormat;
@@ -40,7 +41,7 @@ import java.util.Locale;
*
* <p>
* 构造时可选是否将NaN转为0，默认为true。<br>
* 参考：https://stackoverflow.com/questions/5876369/why-does-casting-double-nan-to-int-not-throw-an-exception-in-java
* 参考：<a href="https://stackoverflow.com/questions/5876369/why-does-casting-double-nan-to-int-not-throw-an-exception-in-java">why-does-casting-double-nan-to-int-not-throw-an-exception-in-java</a>
* </p>
*
* @author Looly
@@ -374,6 +375,16 @@ public class NumberParser {
// issue@4197@Github 转为半角
numberStr = ConvertUtil.toDBC(numberStr);
// issue#IDJ1NS@Gitee 处理科学计数法E+格式
// NumberFormat对E+格式支持不佳,使用BigDecimal直接解析
if (StrUtil.containsIgnoreCase(numberStr, "e")) {
try {
return new BigDecimal(numberStr);
} catch (final NumberFormatException e) {
// BigDecimal解析失败,继续使用NumberFormat尝试
}
}
try {
final NumberFormat format = NumberFormat.getInstance(locale);
if (format instanceof DecimalFormat) {

10
hutool-core/src/test/java/cn/hutool/v7/core/math/NumberUtilTest.java
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@@ -528,6 +528,16 @@ public class NumberUtilTest {
}
@Test
void issueIDJ1NSTest(){
final String numberstr1 = "8.37095942E+9";
final BigDecimal result1 = (BigDecimal) NumberUtil.parseNumber(numberstr1);
final String numberstr2 = "8.37095942e+9";
final BigDecimal result2 = (BigDecimal) NumberUtil.parseNumber(numberstr2);
assertEquals(new BigDecimal("8370959420").toPlainString(), result1.toPlainString());
assertEquals(new BigDecimal("8370959420").toPlainString(), result2.toPlainString());
}
@Test
public void parseHexNumberTest() {
// 千位分隔符去掉