import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import com.mchange.v2.c3p0.ComboPooledDataSource;

public class JdbcUtils {
	public QueryRunner runner = new QueryRunner(new ComboPooledDataSource());
	

	// 查詢所有資料
	public ArrayList<Student> queryAll() {

		ArrayList<Student> list = null;
		
		String sql = "select * from student";
		try {
			
			//查詢所有資料,並將資料存入集合中
			list = (ArrayList<Student>) runner.query(sql, new BeanListHandler<Student>(Student.class));

		} catch (SQLException e) {

			e.printStackTrace();
		}
		return list;
	}
//按學號查詢資料 返回student物件
	public Student queryById() {
		Student queryResult = null;
		
		String sql = "select * from student where stuId=?";
		try {
			queryResult = runner.query(sql, new BeanHandler<Student>(Student.class), "20170831005");
		} catch (SQLException e) {

			e.printStackTrace();
		}
		return queryResult;
	}

	//更新資料
	public void update(int math,String stuId){
		String sql="update student set math=? where stuId=?";
		try {
			int rows = runner.update(sql, math,stuId);
			if(rows>0){
				System.out.println("更新成功");
			}
		} catch (SQLException e) {
			
			e.printStackTrace();
		}
	}
	//插入資料
	public void insert(String stuId,String stuName,String stuSex,int chinese,int math,int english,int classId){
		String  sql="insert into student values(?,?,?,?,?,?,?)";
		
		try {
			int rows = runner.update(sql,stuId,stuName,stuSex,chinese,math,english,classId);
			if (rows>0) {
				System.out.println("插入成功");
				
			}
		} catch (SQLException e) {
			
			e.printStackTrace();
		}
	}
}