add test

hutool-core/src/test/java/cn/hutool/core/net/UrlBuilderTest.java

@@ -204,4 +204,10 @@ public class UrlBuilderTest {
 		final UrlBuilder urlBuilder = UrlBuilder.ofHttp("http://a.com/aaa bbb.html", CharsetUtil.CHARSET_UTF_8);
 		Assert.assertEquals("http://a.com/aaa%20bbb.html", urlBuilder.toString());
 	}
+
+	@Test
+	public void dotEncodeTest(){
+		final UrlBuilder urlBuilder = UrlBuilder.ofHttp("http://xtbgyy.digitalgd.com.cn/ebus/../../..", CharsetUtil.CHARSET_UTF_8);
+		Assert.assertEquals("http://xtbgyy.digitalgd.com.cn/ebus/../../..", urlBuilder.toString());
+	}
 }

hutool-http/src/main/java/cn/hutool/http/HttpConnection.java

@@ -531,7 +531,7 @@ public class HttpConnection {
 		final URLConnection conn = openConnection();
 		if (false == conn instanceof HttpURLConnection) {
 			// 防止其它协议造成的转换异常
-			throw new HttpException("'{}' is not a http connection, make sure URL is format for http.", conn.getClass().getName());
+			throw new HttpException("'{}' of URL [{}] is not a http connection, make sure URL is format for http.", conn.getClass().getName(), this.url);
 		}
 
 		return (HttpURLConnection) conn;

hutool-http/src/test/java/cn/hutool/http/test/HttpRequestTest.java

@@ -143,4 +143,5 @@ public class HttpRequestTest {
 		HttpResponse execute = get.execute();
 		Console.log(execute.body());
 	}
+
 }