!192 修复JSONUtil.toBean精度丢失

Merge pull request !192 from shiguanghuixiao/v5-dev

hutool-json/src/main/java/cn/hutool/json/InternalJSONUtil.java

@@ -9,6 +9,7 @@ import cn.hutool.core.util.StrUtil;
 
 import java.io.IOException;
 import java.io.Writer;
+import java.math.BigDecimal;
 import java.time.temporal.TemporalAccessor;
 import java.util.Calendar;
 import java.util.Collection;
@@ -158,10 +159,7 @@ final class InternalJSONUtil {
 		if ((b >= '0' && b <= '9') || b == '-') {
 			try {
 				if (string.indexOf('.') > -1 || string.indexOf('e') > -1 || string.indexOf('E') > -1) {
-					double d = Double.parseDouble(string);
-					if (false == Double.isInfinite(d) && false == Double.isNaN(d)) {
-						return d;
-					}
+					return new BigDecimal(string);
 				} else {
 					Long myLong = new Long(string);
 					if (string.equals(myLong.toString())) {

hutool-json/src/test/java/cn/hutool/json/JSONUtilTest.java

@@ -10,8 +10,10 @@ import cn.hutool.json.test.bean.UserC;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.math.BigDecimal;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 public class JSONUtilTest {
@@ -124,6 +126,15 @@ public class JSONUtilTest {
 		// Assert.assertEquals("{\"age\":18,\"gender\":\"男\"}", user.getProp());
 	}
 
+	@Test
+	public void toBeanTest3() {
+		//		测试数字类型精度丢失的情况
+		String number = "1234.123456789123456";
+		String jsonString = "{\"create\":{\"details\":[{\"price\":" + number + "}]}}";
+		WebCreate create = JSONUtil.toBean(jsonString, WebCreate.class);
+		Assert.assertEquals(number,create.getCreate().getDetails().get(0).getPrice().toString());
+	}
+
 	@Test
 	public void putByPathTest() {
 		JSONObject json = new JSONObject();
@@ -161,4 +172,62 @@ public class JSONUtilTest {
 		final JSONObject jsonObject = JSONUtil.parseObj(json);
 		Assert.assertEquals("12.00", jsonObject.getBigDecimal("test").setScale(2).toString());
 	}
+
+
+	class WebCreate {
+		private Create create;
+		@Override
+		public String toString() {
+			return "WebCreate{" +
+					"create=" + create +
+					'}';
+		}
+
+		public void setCreate(Create create) {
+			this.create = create;
+		}
+
+		public Create getCreate() {
+			return create;
+		}
+	}
+
+	class Create {
+		@Override
+		public String toString() {
+			return "Create{" +
+					"details=" + details +
+					'}';
+		}
+
+		private List<Detail> details;
+
+		public void setDetails(List<Detail> details) {
+			this.details = details;
+		}
+
+		public List<Detail> getDetails() {
+			return details;
+		}
+	}
+
+	class Detail {
+		private BigDecimal price;
+
+		public void setPrice(BigDecimal price) {
+			this.price = price;
+		}
+
+		@Override
+		public String toString() {
+			return "Detail{" +
+					"price=" + price +
+					'}';
+		}
+
+		public BigDecimal getPrice() {
+			return price;
+		}
+	}
 }
+