WzwJDBC 自定义工具类(获取连接,释放资源)

package wzwUtil;

import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;

public class WzwJDBC {

    private static String driverClass;
    private static String url;
    private static String user;
    private static String password;

    static {
        InputStream is = null;
        try {
            //获取配置文件中的数据
            Properties p = new Properties();
            //获取内容
            is = WzwJDBC.class.getClassLoader().getResourceAsStream("wzwProp.properties");
            //加载
            p.load(is);
            //赋值
            driverClass = p.getProperty("driverClass");
            url = p.getProperty("url");
            user = p.getProperty("user");
            password = p.getProperty("password");

            //注册
            Class.forName(driverClass);

        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                is.close();
            } catch (Exception e1) {
                e1.printStackTrace();
            }
        }

    }

    public static Connection getConncetion() throws Exception {
        //获取连接
        Connection connection = DriverManager.getConnection(url, user, password);
        return connection;
    }

    public static void close(ResultSet resultSet, Statement statement,Connection connection){
        try {
            if (resultSet != null) {
                resultSet.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        try {
            if (statement != null) {
                statement.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        try {
            if (connection != null) {
                connection.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

    public static void close(Statement statement,Connection connection){
        WzwJDBC.close(null,statement,connection);

    }
}