Java jdbc 连接数据库

连接数据库需要jdbc驱动， 在 Eclipse 中 add external jar 即可

package db.test;
import java.sql.*;

public class JdbcTest {
  
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    
    String driver = "com.mysql.jdbc.Driver";
    String url = "jdbc:mysql://127.0.0.1:3306/test";
    
    String user = "dbtest";
    String passwd = "123456";
    
    try {
      Class.forName(driver);
      Connection conn = DriverManager.getConnection(url, user, passwd);
      if (!conn.isClosed())
        System.out.println("Success");
      Statement statement = conn.createStatement();
      String sql = "select * from dbstu";
      
      ResultSet rs = statement.executeQuery(sql);
      System.out.println("ID" + "\t" +"Name");
      String name = null;
      
      while (rs.next()) {
        name = rs.getString("name");

        System.out.println(rs.getString("id") + "\t" + name);
      }
      rs.close();
      statement.close();
      conn.close();
    }
    catch (ClassNotFoundException e) {
      System.out.println("Can not find the driver !");
      e.printStackTrace();
    } catch (SQLException e) {
      e.printStackTrace();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

}