JDBC

1 连接mysql数据库

package lianxi1;

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

import org.junit.Test;


public class JdbcTest {

@Test    
    public void test1() throws Exception{
        getConnection();
    }
    // 1写入连接数据库的四个字符串
    public Connection getConnection() throws Exception{
        // 2 读取类路径下的jdbc.properites文件
        InputStream is = getClass().getClassLoader().getResourceAsStream("jdbc.properties");
        Properties pro = new Properties();
        pro.load(is);
        String driver = pro.getProperty("driverClass");
        String url = pro.getProperty("url");
        String user = pro.getProperty("user");
        String password = pro.getProperty("password");
        //3 创建连接
        Class.forName(driver);
        return DriverManager.getConnection(url, user,password);
        
    }
}

jdbc.properties文件：

driverClass = com.mysql.jdbc.Driver
url = jdbc:mysql://localhost:3306/test
user = user
password =1234