diff --git a/CHANGELOG.md b/CHANGELOG.md
index d1d10560c..81cee78a6 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
 * 【http   】     修复https下可能的Patch、Get请求失效问题（issue#I3Z3DH@Gitee）
 * 【core   】     修复RandomUtil#randomString 入参length为负数时报错问题（issue#2515@Github）
 * 【core   】     修复SecureUtil传入null的key抛出异常问题（pr#2521@Github）
+* 【core   】     修复UrlBuilder的toURI方法将url重复编码（issue#2503@Github）
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/net/url/UrlBuilder.java b/hutool-core/src/main/java/cn/hutool/core/net/url/UrlBuilder.java
index 76199023a..86a5138d7 100755
--- a/hutool-core/src/main/java/cn/hutool/core/net/url/UrlBuilder.java
+++ b/hutool-core/src/main/java/cn/hutool/core/net/url/UrlBuilder.java
@@ -544,12 +544,7 @@ public final class UrlBuilder implements Builder<String> {
 	 */
 	public URI toURI() {
 		try {
-			return new URI(
-					getSchemeWithDefault(),
-					getAuthority(),
-					getPathStr(),
-					getQueryStr(),
-					getFragmentEncoded());
+			return toURL().toURI();
 		} catch (URISyntaxException e) {
 			return null;
 		}
diff --git a/hutool-core/src/test/java/cn/hutool/core/net/UrlBuilderTest.java b/hutool-core/src/test/java/cn/hutool/core/net/UrlBuilderTest.java
index 5f869e70e..35e7fc346 100644
--- a/hutool-core/src/test/java/cn/hutool/core/net/UrlBuilderTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/net/UrlBuilderTest.java
@@ -445,4 +445,21 @@ public class UrlBuilderTest {
 		final UrlBuilder of = UrlBuilder.of(url, null);
 		Assert.assertEquals(url.replace("&amp;", "&"), of.toString());
 	}
+
+	@SuppressWarnings("ConstantConditions")
+	@Test
+	public void issues2503Test() throws URISyntaxException {
+		String duplicate = UrlBuilder.ofHttp("127.0.0.1:8080")
+				.addQuery("param[0].field", "编码")
+				.toURI()
+				.toString();
+		Assert.assertEquals("http://127.0.0.1:8080?param%5B0%5D.field=%E7%BC%96%E7%A0%81", duplicate);
+
+		String normal = UrlBuilder.ofHttp("127.0.0.1:8080")
+				.addQuery("param[0].field", "编码")
+				.toURL()
+				.toURI()
+				.toString();
+		Assert.assertEquals(duplicate, normal);
+	}
 }
diff --git a/hutool-db/src/test/java/cn/hutool/db/DbTest.java b/hutool-db/src/test/java/cn/hutool/db/DbTest.java
index 5419097a2..6b43f5d7c 100644
--- a/hutool-db/src/test/java/cn/hutool/db/DbTest.java
+++ b/hutool-db/src/test/java/cn/hutool/db/DbTest.java
@@ -132,4 +132,10 @@ public class DbTest {
 			return ps;
 		}), new EntityListHandler());
 	}
+
+	@Test
+	@Ignore
+	public void findWithDotTest() throws SQLException {
+		Db.use().find(Entity.create("user").set("a.b", "1"));
+	}
 }