diff --git a/hutool-db/src/main/java/org/dromara/hutool/db/config/ConnectionConfig.java b/hutool-db/src/main/java/org/dromara/hutool/db/config/ConnectionConfig.java
index 50dceb1aa..84d4ea9bd 100644
--- a/hutool-db/src/main/java/org/dromara/hutool/db/config/ConnectionConfig.java
+++ b/hutool-db/src/main/java/org/dromara/hutool/db/config/ConnectionConfig.java
@@ -186,4 +186,16 @@ public class ConnectionConfig<T extends ConnectionConfig<?>> {
 		this.poolProps.setProperty(key, value);
 		return (T) this;
 	}
+
+	@Override
+	public String toString() {
+		return "ConnectionConfig{" +
+			"driver='" + driver + '\'' +
+			", url='" + url + '\'' +
+			", user='" + user + '\'' +
+			", pass='****" + '\'' +
+			", connProps=" + connProps +
+			", poolProps=" + poolProps +
+			'}';
+	}
 }
diff --git a/hutool-db/src/main/java/org/dromara/hutool/db/ds/c3p0/C3p0DSFactory.java b/hutool-db/src/main/java/org/dromara/hutool/db/ds/c3p0/C3p0DSFactory.java
index e90a5ea7c..93b7f829a 100644
--- a/hutool-db/src/main/java/org/dromara/hutool/db/ds/c3p0/C3p0DSFactory.java
+++ b/hutool-db/src/main/java/org/dromara/hutool/db/ds/c3p0/C3p0DSFactory.java
@@ -56,7 +56,7 @@ public class C3p0DSFactory implements DSFactory {
 		// 连接配置
 		final Properties connProps = config.getConnProps();
 		if(MapUtil.isNotEmpty(connProps)){
-			ds.setProperties(connProps);
+			ds.getProperties().putAll(connProps);
 		}
 
 		return ds;
diff --git a/hutool-db/src/test/java/org/dromara/hutool/db/ds/DsTest.java b/hutool-db/src/test/java/org/dromara/hutool/db/ds/DsTest.java
index a41de92c9..640a8f70f 100644
--- a/hutool-db/src/test/java/org/dromara/hutool/db/ds/DsTest.java
+++ b/hutool-db/src/test/java/org/dromara/hutool/db/ds/DsTest.java
@@ -104,7 +104,7 @@ public class DsTest {
 	public void c3p0DsuserAndPassTest() {
 		// https://gitee.com/dromara/hutool/issues/I4T7XZ
 		DSUtil.setGlobalDSFactory(new C3p0DSFactory());
-		final ComboPooledDataSource ds = (ComboPooledDataSource) ((DSWrapper) DSUtil.getDS("mysql")).getRaw();
+		final ComboPooledDataSource ds = (ComboPooledDataSource) DSUtil.getDS("mysql").getRaw();
 		Assertions.assertEquals("root", ds.getUser());
 		Assertions.assertEquals("123456", ds.getPassword());
 	}