fix pool bug

hutool-db/src/test/java/org/dromara/hutool/db/ds/PooledDataSourceTest.java

@@ -0,0 +1,30 @@
+package org.dromara.hutool.db.ds;
+
+import org.dromara.hutool.db.DbException;
+import org.dromara.hutool.db.config.SettingConfigParser;
+import org.dromara.hutool.db.ds.pooled.PooledDSFactory;
+import org.dromara.hutool.setting.Setting;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.sql.SQLException;
+
+public class PooledDataSourceTest {
+	@Test
+	void getConnTest() {
+		final DSPool dsPool = new DSPool(
+			new SettingConfigParser(new Setting("config/db.setting")),
+			new PooledDSFactory());
+
+		final DSWrapper test = dsPool.getDataSource("test");
+		Assertions.assertEquals("org.dromara.hutool.db.ds.pooled.PooledDataSource", test.getRaw().getClass().getName());
+		for (int i = 0; i < 1000; i++) {
+			try {
+				test.getConnection().close();
+			} catch (final SQLException e) {
+				throw new DbException(e);
+			}
+		}
+
+	}
+}