fix code and add test

hutool-db/src/main/java/cn/hutool/db/ds/AbstractDSFactory.java

@@ -153,6 +153,7 @@ public abstract class AbstractDSFactory extends DSFactory {
 		DataSourceWrapper ds = dsMap.get(group);
 		if (ds != null) {
 			ds.close();
+			//noinspection resource
 			dsMap.remove(group);
 		}
 	}

hutool-db/src/main/java/cn/hutool/db/ds/DataSourceWrapper.java

@@ -1,5 +1,6 @@
 package cn.hutool.db.ds;
 
+import cn.hutool.core.clone.CloneRuntimeException;
 import cn.hutool.core.io.IoUtil;
 
 import javax.sql.DataSource;
@@ -30,7 +31,7 @@ public class DataSourceWrapper implements DataSource, Closeable, Cloneable {
 	 *
 	 * @param ds     原始的DataSource
 	 * @param driver 数据库驱动类名
-	 * @return {@link DataSourceWrapper}
+	 * @return DataSourceWrapper
 	 */
 	public static DataSourceWrapper wrap(DataSource ds, String driver) {
 		return new DataSourceWrapper(ds, driver);
@@ -117,4 +118,12 @@ public class DataSourceWrapper implements DataSource, Closeable, Cloneable {
 		}
 	}
 
-}
+	@Override
+	public DataSourceWrapper clone() {
+		try {
+			return (DataSourceWrapper) super.clone();
+		} catch (CloneNotSupportedException e) {
+			throw new CloneRuntimeException(e);
+		}
+	}
+}

hutool-db/src/test/java/cn/hutool/db/ds/DataSourceWrapperTest.java

@@ -0,0 +1,18 @@
+package cn.hutool.db.ds;
+
+import cn.hutool.db.ds.simple.SimpleDataSource;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class DataSourceWrapperTest {
+
+	@Test
+	public void cloneTest(){
+		final SimpleDataSource simpleDataSource = new SimpleDataSource("jdbc:sqlite:test.db", "", "");
+		final DataSourceWrapper wrapper = new DataSourceWrapper(simpleDataSource, "test.driver");
+
+		final DataSourceWrapper clone = wrapper.clone();
+		Assert.assertEquals("test.driver", clone.getDriver());
+		Assert.assertEquals(simpleDataSource, clone.getRaw());
+	}
+}