书店管理系统前后端源代码及资源

package dao.impl; import dao.IUserDao; import entity.IndexUser; import utils.DBUtil; import utils.DBUtil; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; public class UserDaoImpl implements IUserDao { public boolean login(IndexUser login) { ResultSet rs = null; boolean flag = false; String sql = "select * from user where user=? and pwd =?"; Object[] params = { login.getName(), login.getPwd() }; rs = DBUtil.executeQuery(sql, params); try { if (rs.next()) { flag = true; } return flag; } catch (SQLException e) { e.printStackTrace(); return false; } finally { try { if (rs != null) rs.close(); } catch (SQLException e) { e.printStackTrace(); } } } public List<IndexUser> All(IndexUser login) { PreparedStatement pstmt = null; ResultSet rs = null; List<IndexUser> users = new ArrayList<>(); IndexUser user = null; try { String sql = "select * from user"; Object[] params = { }; rs = DBUtil.executeQuery(sql, params); while (rs.next()) { String name = rs.getString("user"); String pwd = rs.getString("pwd"); String email = rs.getString("email"); user = new IndexUser(name, pwd, email); users.add(user); } return users; } catch (SQLException e) { e.printStackTrace(); return null; } finally { DBUtil.closeAll(rs, pstmt, DBUtil.connection); } } public boolean regist(IndexUser regist) { String sql = "insert into user(user,pwd,email) value(?,?,?)"; Object[] params = { regist.getName(), regist.getPwd(), regist.getEmail() }; return DBUtil.executeUpdate(sql, params); } public boolean update(IndexUser user) { String sql = "update user set sex=?,email=? where user=?"; Object[] params = { user.getSex(), user.getEmail(), user.getName() }; return DBUtil.executeUpdate(sql, params); } public IndexUser UserByName(String name) { ResultSet rs = null; IndexUser user = null; String sql = "select * from user where user=?"; Object[] params = { name }; rs = DBUtil.executeQuery(sql, params); try { if (rs.next()) { String pwd = rs.getString("pwd"); String type = rs.getString("s_type"); String email = rs.getString("email"); int sex = rs.getInt("sex"); user = new IndexUser(name, pwd, email, type, sex); } return user; } catch (SQLException e) { e.printStackTrace(); return null; } finally { try { if (rs != null) rs.close(); } catch (SQLException e) { e.printStackTrace(); } } } public boolean isExit(String name) { ResultSet rs = null; boolean flag = false; String sql = "select * from user where user=?"; Object[] params = { name }; rs = DBUtil.executeQuery(sql, params); try { if (rs.next()) { flag = true; } return flag; } catch (SQLException e) { e.printStackTrace(); return false; } finally { if (rs != null) try { rs.close(); } catch (SQLException e) { e.printStackTrace(); } } } }