【JDBC】Extra01 Oracle-JDBC

关于驱动包依赖：

官网提供的地址：

https://www.oracle.com/database/technologies/jdbc-drivers-12c-downloads.html

Maven仓库提供的：

https://mvnrepository.com/artifact/com.oracle.database.jdbc/ojdbc8

看不懂版本命名规则，介绍信息中只有简单的几句兼容JDK版本就没有了。。。

先试试这个版本的：

<!-- https://mvnrepository.com/artifact/com.oracle.database.jdbc/ojdbc8 -->
<dependency>
    <groupId>com.oracle.database.jdbc</groupId>
    <artifactId>ojdbc8</artifactId>
    <version>19.7.0.0</version>
    <scope>test</scope>
</dependency>

测试类编写：

@Test
public void connectorTest() throws Exception{

    Class.forName("oracle.jdbc.driver.OracleDriver");
    // final String URL = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
    final String URL2 = "jdbc:oracle:thin:@//127.0.0.1:1521/orcl";
    final String USERNAME = "system";
    final String PASSWORD = "123456";

    Connection connection = DriverManager.getConnection(URL2, USERNAME, PASSWORD);
    System.out.println(connection);
    connection.close();
}

发现也很简单，注册驱动包路径之后剩下的东西也是一样操作的

就是发现两个URL链接地址都是可以使用的。。。。

打印输出链接对象

oracle.jdbc.driver.T4CConnection@14bf9759

Process finished with exit code 0

连接参数解耦剥离：

【ojdbc.properties】

oracle.jdbc.DriverClass = oracle.jdbc.driver.OracleDriver
oracle.jdbc.Url = jdbc:oracle:thin:@//127.0.0.1:1521/orcl
oracle.jdbc.Username = system
oracle.jdbc.Password = 123456

链接工具类：

package cn.zeal4j.util;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

/**
 * @author Administrator
 * @file Oracle-JDBC
 * @create 2020 09 27 11:59
 */
public class OJdbcUtil {
    private OJdbcUtil() {}
    private static String driverClassName;
    private static String connectUrl;
    private static String username;
    private static String password;

    static {

        try {
            InputStream resourceAsStream = OJdbcUtil.class.getClassLoader().getResourceAsStream("ojdbc.properties");
            Properties properties = new Properties();
            properties.load(resourceAsStream);

            driverClassName = properties.getProperty("oracle.jdbc.DriverClass");
            connectUrl = properties.getProperty("oracle.jdbc.Url");
            username = properties.getProperty("oracle.jdbc.Username");
            password = properties.getProperty("oracle.jdbc.Password");

            Class.forName(driverClassName);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static Connection getConnection() {
        try {
            return DriverManager.getConnection(connectUrl, username, password);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return null;
    }
}

测试类：

@Test
public void connectorTest2() throws Exception{
    Connection connection = OJdbcUtil.getConnection();
    System.out.println(connection);
    connection.close();
}

测试结果：

oracle.jdbc.driver.T4CConnection@553f17c

Process finished with exit code 0