fix Issue2866.test:18 expected: <0> but was: <0E-18>

tanghaoth90 · tanghaoth90 · commit cf057cdf59a4 · 2025-03-12T16:31:58.000+08:00
diff --git a/core/src/main/java/com/alibaba/fastjson2/JSONReader.java b/core/src/main/java/com/alibaba/fastjson2/JSONReader.java
@@ -3099,7 +3099,7 @@ public final Number getNumber() {
                         return Double.parseDouble(
                                 decimalStr + "E" + exponent);
                     }
-                    return new BigDecimal(decimalStr + "E" + exponent);
+                    return decimal.signum() == 0 ? BigDecimal.ZERO : new BigDecimal(decimalStr + "E" + exponent);
                 }
 
                 if ((context.features & Feature.UseDoubleForDecimals.mask) != 0) {

Original file line number	Diff line number	Diff line change
`@@ -3099,7 +3099,7 @@ public final Number getNumber() {`
`3099`	`3099`	`return Double.parseDouble(`
`3100`	`3100`	`decimalStr + "E" + exponent);`
`3101`	`3101`	`}`
`3102`		`- return new BigDecimal(decimalStr + "E" + exponent);`
	`3102`	`+ return decimal.signum() == 0 ? BigDecimal.ZERO : new BigDecimal(decimalStr + "E" + exponent);`
`3103`	`3103`	`}`
`3104`	`3104`
`3105`	`3105`	`if ((context.features & Feature.UseDoubleForDecimals.mask) != 0) {`