import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class helloworld { public static void main(String[] args) throws ClassNotFoundException, SQLException { Class.forName("com.mysql.jdbc.Driver"); Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydata", "root", ""); System.out.println(con); String sql = "select * from student"; PreparedStatement pst = con.prepareStatement(sql); ResultSet rs = pst.executeQuery(); while(rs.next()) { int id = rs.getInt("id");//rs.getInt(1) String name = rs.getString("name");//rs.getString(2) int age = rs.getInt("age");//rs,getInt(3) System.out.printf("%d %s %d\n", id, name, age); } rs.close(); pst.close(); con.close(); } }
java mysql
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