import java.sql.*;
public class E1 {
public static void main(String args[]) {
Connection con=null;
Statement sql;
ResultSet rs;
try{ Class.forName("com.mysql.cj.jdbc.Driver"); //加载JDBC_MySQL驱动
}
catch(Exception e){}
String uri = "jdbc:mysql://localhost:3306/students";
String user ="root";
String password ="13002425830";
try{
con = DriverManager.getConnection(uri,user,password); //连接代码
}
catch(SQLException e){
throw new RuntimeException(e);
}
try {
sql=con.createStatement();
rs=sql.executeQuery("SELECT * FROM mess"); //查询mess表
while(rs.next()) {
String number=rs.getString(1);
String name=rs.getString(2);
int people=rs.getInt(3);
float height=rs.getFloat(4);
double weight=rs.getDouble(5);
System.out.printf("%s\t",number);
System.out.printf("%s\t",name);
System.out.printf("%s\t",people);
System.out.printf("%.2f\t",height);
System.out.printf("%.2f\n",weight);
}
con.close();
}
catch(SQLException e) {
System.out.println(e);
}
}
}