classroom.java

来自「实习的时候做的数字校园系统」· Java 代码 · 共 196 行

package com.xxgl.business;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.xxgl.data.DBconnection;
import com.xxgl.data.DBUtil;
import com.xxgl.bean.ClassroomBean;

public class Classroom {

	public int insertClassroom(ClassroomBean Croom) {
		String sql = "insert into Classroom (cr_NO,cr_type,cr_zws,sfk) values (?,?,?,?)";

		Connection con = DBconnection.getConnection();
		PreparedStatement pstmt = null;

		int count = 0;
		try {
			pstmt = con.prepareStatement(sql);

			pstmt.setString(1, Croom.getCr_NO());
			pstmt.setString(2, Croom.getCr_type());
			pstmt.setInt(3, Croom.getCr_zws());
			pstmt.setInt(4, Croom.getSfk());

			count = pstmt.executeUpdate();

			DBUtil.close(pstmt);
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(con);
		}
		return count;
	}

	public int updateClassroom(ClassroomBean Croom) {
		String sql = "update Classroom set cr_type=?,cr_zws=?,sfk=? where cr_NO=?";

		Connection con = DBconnection.getConnection();
		PreparedStatement pstmt = null;
		int count = 0;
		try {
			pstmt = con.prepareStatement(sql);

			pstmt.setString(1, Croom.getCr_type());
			pstmt.setInt(2, Croom.getCr_zws());
			pstmt.setInt(3, Croom.getSfk());
			pstmt.setString(4, Croom.getCr_NO());
			
			count = pstmt.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(pstmt);
			DBUtil.close(con);
		}

		return count;
	}

	public int deleteBy(String cr_NO) {
		String sql = "delete from Classroom where cr_NO=?";

		Connection con = DBconnection.getConnection();
		PreparedStatement pstmt = null;

		int count = 0;
		try {
			pstmt = con.prepareStatement(sql);

			pstmt.setString(1, cr_NO);

			count = pstmt.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(pstmt);
			DBUtil.close(con);
		}

		return count;
	}

	public ClassroomBean selectClassroom(String cr_NO) {
		String sql = "select cr_NO,cr_type,cr_zws,sfk from Classroom where cr_NO=?";

		Connection con = DBconnection.getConnection();
		PreparedStatement pstmt = null;
		ClassroomBean pdBean = null;
		try {
			pstmt = con.prepareStatement(sql);

			pstmt.setString(1, cr_NO);

			ResultSet rs = pstmt.executeQuery();

			if (rs.next()) {
				pdBean = new ClassroomBean();

				pdBean.setCr_NO(rs.getString("cr_NO"));
				pdBean.setCr_type(rs.getString("cr_type"));
				pdBean.setCr_zws(rs.getInt("cr_zws"));
				pdBean.setSfk(rs.getInt("sfk"));
				
			}
			DBUtil.close(rs);
			

		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(pstmt);
			DBUtil.close(con);
		}

		return pdBean;
	}
	
	public List selectAll() {
		String sql = "select cr_NO,cr_type,cr_zws,sfk from Classroom";

		Connection con = DBconnection.getConnection();
		PreparedStatement pstmt = null;
		List list = new ArrayList();
		
		try {
			pstmt = con.prepareStatement(sql);

			ResultSet rs = pstmt.executeQuery();
			while (rs.next()) {
				ClassroomBean pdBean = new ClassroomBean();

				pdBean.setCr_NO(rs.getString("cr_NO"));
				pdBean.setCr_type(rs.getString("cr_type"));
				pdBean.setCr_zws(rs.getInt("cr_zws"));
				pdBean.setSfk(rs.getInt("sfk"));
				
				list.add(pdBean);
			}
			DBUtil.close(rs);
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(pstmt);
			DBUtil.close(con);
		}

		return list;
	}

	
//	public static void main(String[] args) {
//		ClassroomBean bean = new ClassroomBean();
		 
//		bean.setCr_NO("109");
//		bean.setCr_type("37");
//        bean.setCr_zws(65);
//        bean.setSfk(0);
//		
//		Classroom bo = new Classroom();
//		int count = bo.insertClassroom(bean);
//		System.out.println("count: " + count);
//		System.out.println("Cr_zws: " + bean.getCr_zws());
		
//		bean.setCr_NO(r_NO);
//		Classroom bo = new Classroom();
//		int count = bo.updateClassroom(bean);
//		System.out.println("count: " + count);
		
//		bean.setCr_NO(20);
//		bean.setCr_type("37");
//		bean.setCr_zws(65);
	
//		Classroom bo = new Classroom();
//		int count = bo.deleteBy(r_NO);
//		System.out.println("count=" + count);
		
//		Classroom bo = new Classroom();
//		ClassroomBean testBean = bo.selectClassroom("109");
//	    System.out.println(testBean.getCr_NO()+"   "+testBean.getCr_type()+"   "+"Cr_zws=" + testBean.getCr_zws());
		 
//		Classroom bo = new Classroom();
//		List list = bo.selectAll();
//		System.out.println("list length: " + list.size());
//		for(int i = 0; i < list.size(); i++) {
//			 ClassroomBean testBean = (ClassroomBean)list.get(i);
//			 System.out.println(testBean.getCr_NO()+"   "+testBean.getCr_type()+"   "+testBean.getCr_zws());
//		 }
//	}
}