studentdaoclient.java

学生选课系统PPT答辩论文 ?】蜗低砅PT答辩论文

package day1home;

import java.sql.*;

public class StudentDaoClient {
	public static void main(String[] args) {
		StudentDao dao = new StudentDao();
		if (args.length == 0) {
			print();
			return;
		} else if (args[0].equals("i")) {
			if(args[1]=null){
				print();
				return;
			}
			try {
				dao.insert(args[1],args[2],args[3]);	
			} catch (Exception e) {
				e.printStackTrace();
			}
	
		} else if (args[0].equals("s")) {
			if(args[1]=null){
				print();
				return;
			}
			dao.select();
			
		} else if (args[0].equals("d")) {
			if(args[1]=null){
				print();
				return;
			}
			dao.delete(args[1]);
			
		} else if (args[0].equals("u")) {
			if(args[1]=null){
				print();
				return;
			}
			dao.update(args[1],args[2],args[3]);
			
		} else {
			System.out.println("unknown command:" + args[0]);
		}
	}

	static void print(){
			System.out
					.println("java  day1home.StudentDaoClient + <type_insert>="+ "i" +"  + id_insert  + name      +  birthday ");
			System.out
					.println("java  day1home.StudentDaoClient + <type_update>="+ "u" +"  + id_update  + new_name  +  new_birthday ");
			System.out
			.println("java  day1home.StudentDaoClient + <type_delete>="+ "d" +"  + id_delete");
			System.out
			.println("java  day1home.StudentDaoClient + <type_select>="+ "s");
	}
}