synchronizer-jdbc

maxkey-common/src/main/java/org/maxkey/util/JdbcUtils.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright [2022] [MaxKey of copyright http://www.maxkey.top]
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+
+package org.maxkey.util;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+public class JdbcUtils {
+
+	public static Connection connect(String url, String user, String pwd, String driverClass) {
+		Connection conn = null;
+		try {
+			Class.forName(driverClass);
+			conn = java.sql.DriverManager.getConnection(url, user, pwd);
+			return conn;
+		} catch (ClassNotFoundException e) {
+			System.out.println("ClassNotFoundException");
+			return null;
+		} catch (SQLException e) {
+			System.out.println("SQLException");
+		}
+		return null;
+	}
+
+	public void release(Connection conn) {
+		if (conn != null) {
+			try {
+				conn.close();
+			} catch (SQLException e) {
+				System.out.println("SQLException");
+			}
+		}
+	}
+
+	public static void release(Connection conn, Statement stmt, ResultSet rs) {
+		if (rs != null)
+			try {
+				rs.close();
+				rs = null;
+			} catch (SQLException e) {
+				System.out.println("SQLException");
+			}
+		if (stmt != null)
+			try {
+				stmt.close();
+				stmt = null;
+			} catch (SQLException e) {
+				System.out.println("SQLException");
+			}
+		if (conn != null) {
+			try {
+				conn.close();
+				conn = null;
+			} catch (SQLException e) {
+				System.out.println("SQLException");
+			}
+		}
+	}
+	
+	public static void release(Connection conn, Statement stmt, PreparedStatement pstmt, ResultSet rs) {
+		if (rs != null)
+			try {
+				rs.close();
+				rs = null;
+			} catch (SQLException e) {
+				System.out.println("ResultSet Close Exception");
+			}
+		if (stmt != null)
+			try {
+				stmt.close();
+				stmt = null;
+			} catch (SQLException e) {
+				System.out.println("Statement Close Exception");
+			}
+		if (pstmt != null)
+			try {
+				pstmt.close();
+				pstmt = null;
+			} catch (SQLException e) {
+				System.out.println("PreparedStatement Close Exception");
+			}
+		if (conn != null) {
+			try {
+				conn.close();
+				conn = null;
+			} catch (SQLException e) {
+				System.out.println("Connection Close Exception");
+			}
+		}
+	}
+
+	
+}