ADD file via upload

Jdbc.java

@@ -0,0 +1,84 @@
+package flowershop.daoimpl;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class Jdbc {
+    // 数据连接URL
+    static String url;
+    // 创建Properties对象
+    static Properties info = new Properties();
+
+    // 静态代码块
+    static {
+        // 获取属性文件的输入流
+        InputStream input = Jdbc.class.getClassLoader().getResourceAsStream("config.properties");
+
+        try {
+            if (input == null) {
+                throw new NullPointerException("配置文件未找到");
+            }
+
+            // 加载属性文件
+            info.load(input);
+
+            // 从属性文件中读取url
+            url = info.getProperty("url");
+
+            // 从属性文件中读取driver
+            String driverClassName = info.getProperty("driver");
+
+            // 加载驱动程序
+            Class.forName(driverClassName);
+            System.out.println("驱动程序加载成功...");
+
+        } catch (ClassNotFoundException e) {
+            System.out.println("驱动程序加载失败...");
+            e.printStackTrace();
+        } catch (IOException e) {
+            System.out.println("属性文件加载失败...");
+            e.printStackTrace();
+        } catch (NullPointerException e) {
+            System.out.println(e.getMessage());
+        }
+    }
+
+    // 创建数据连接
+    public static Connection getConnection() throws SQLException {
+        // 创建数据连接
+        Connection conn = DriverManager.getConnection(url, info);
+        return conn;
+    }
+
+    // 关闭连接方法
+    public static void close(ResultSet rs, PreparedStatement pstmt, Connection conn) {
+        if (rs != null) {
+            try {
+                rs.close();
+            } catch (SQLException e) {
+                e.printStackTrace();
+            }
+        }
+        if (pstmt != null) {
+            try {
+                pstmt.close();
+            } catch (SQLException e) {
+                e.printStackTrace();
+            }
+        }
+        if (conn != null) {
+            try {
+                conn.close();
+            } catch (SQLException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}