【JDBC】Extra02 SqlServer-JDBC

官网驱动获取地址：

https://www.microsoft.com/zh-cn/download/details.aspx

Maven仓库获取：

https://mvnrepository.com/artifact/com.microsoft.sqlserver/mssql-jdbc

巨硬官网的太慢了我都还没下到，换成用中央仓库的了

POM坐标：

奇怪的是还区分了一些JRE版本，为了不出BUG我就对应的选了JRE8版本的

<!-- https://mvnrepository.com/artifact/com.microsoft.sqlserver/mssql-jdbc -->
<dependency>
    <groupId>com.microsoft.sqlserver</groupId>
    <artifactId>mssql-jdbc</artifactId>
    <version>8.4.1.jre8</version>
</dependency>

链接测试类：

import org.junit.Test;

import java.sql.Connection;
import java.sql.DriverManager;

/**
 * @author Administrator
 * @file IntelliJ IDEA SqlServer-JDBC
 * @create 2020 09 27 20:00
 */
public class SqlServerJdbcTest {

    @Test
    public void connectionTest() throws Exception {
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

        final String URL = "jdbc:sqlserver://localhost:1433;DatabaseName=Test";
        final String USERNAME = "sa";
        final String PASSWORD = "123456";

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

默认使用的用户名称是sa，没反应过来。。。

打印的链接对象：

ConnectionID:1 ClientConnectionId: f6e4ce24-c5db-4bcf-849b-bd6bc359013e

Process finished with exit code 0

---

连接参数解耦剥离，老手艺了

 sqlserver-jdbc.properties配置文件信息：

sqlServer.jdbc.driverClassName = com.microsoft.sqlserver.jdbc.SQLServerDriver
sqlServer.jdbc.connectUrl = jdbc:sqlserver://localhost:1433;DatabaseName=Test
sqlServer.jdbc.username = sa
sqlServer.jdbc.password = 123456

连接工具类：

package cn.zeal4j.util;

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

/**
 * @author Administrator
 * @file IntelliJ IDEA SqlServer-JDBC
 * @create 2020 09 27 20:13
 */
public class SqlServerUtil {
    private SqlServerUtil() {}
    private static String connectUrl;
    private static String username;
    private static String password;

    static {
        try {
            InputStream resourceAsStream = SqlServerUtil.class.getClassLoader().getResourceAsStream("sqlserver-jdbc.properties");
            Properties properties = new Properties();
            properties.load(resourceAsStream);
            Class.forName(properties.getProperty("sqlServer.jdbc.driverClassName"));
            connectUrl = properties.getProperty("sqlServer.jdbc.connectUrl");
            username = properties.getProperty("sqlServer.jdbc.username");
            password = properties.getProperty("sqlServer.jdbc.password");
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }
    
    public static Connection getConnection() {
        try {
            return DriverManager.getConnection(connectUrl, username, password);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return null;
    }
}　

封装之后的测试单元：

@Test
public void connectionTest2() throws Exception {
    Connection connection = SqlServerUtil.getConnection();
    System.out.println(connection);
    connection.close();
}