JAVA网上购物系统(JavaBean+Servlet+jsp)

package test.service; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.List; import test.util.DbConnectionService; import test.vo.BookInfo; import test.vo.CatagoryInfo; public class BookServiceImpl implements IBookService { private Connection connection; private Statement statement; private ResultSet resultSet; public BookServiceImpl() { connection = DbConnectionService.getConnection(); try { statement = connection.createStatement(); } catch (SQLException e) { e.printStackTrace(); } } public Boolean addBookInfo(BookInfo bookInfo) { Boolean boolean1 = null; String sql = "insert into book(crono,bname,author,pdate,publisher,remark,price) values(" + bookInfo.getCrono() + ",'" + bookInfo.getBname() + "','" + bookInfo.getAuthor() + "','" + bookInfo.getPdate() + "','" + bookInfo.getPublisher() + "','" + bookInfo.getRemark() + "'," + bookInfo.getPrice() + ")"; try { boolean1 = statement.execute(sql); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return boolean1; } public List<BookInfo> getBookListInfo() { List<BookInfo> list = new ArrayList<BookInfo>(); String sql = "select * from book"; try { resultSet = statement.executeQuery(sql); while (resultSet.next()) { list.add(new BookInfo(resultSet.getInt(1), resultSet.getInt(2), resultSet.getString(3), resultSet.getString(4), resultSet.getString(5), resultSet.getString(6), resultSet.getString(7), resultSet.getFloat(8))); } } catch (SQLException e) { e.printStackTrace(); } return list; } public List<BookInfo> searchBooks(String bookname) { List<BookInfo> list = new ArrayList<BookInfo>(); String sql = "select * from book where bname like '%" + bookname + "%'"; try { resultSet = statement.executeQuery(sql); while (resultSet.next()) { list.add(new BookInfo(resultSet.getInt(1), resultSet.getInt(2), resultSet.getString(3), resultSet.getString(4), resultSet.getString(5), resultSet.getString(6), resultSet.getString(7), resultSet.getFloat(8))); } } catch (SQLException e) { e.printStackTrace(); } return list; } public Boolean delBookInfo(int bookno) { Boolean result = null; String sql = "delete from book where bookno=" + bookno; try { result = statement.execute(sql); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; } public Boolean updateBookInfo(BookInfo bookInfo) { Boolean result = null; String sql = "update bookinfo set crono='" + bookInfo.getCrono() + "', bname='" + bookInfo.getBname() + "',author='" + bookInfo.getAuthor() + "',pdate='" + bookInfo.getPdate() + "',publisher='" + bookInfo.getPublisher() + "',remark='" + bookInfo.getRemark() + "',price =" + bookInfo.getPrice(); try { result = statement.execute(sql); } catch (SQLException e) { e.printStackTrace(); } return result; } public BookInfo searchBooks(int bookno) { return null; } public BookInfo getOneBookBybookID(int bookno) { BookInfo bookInfo = null; String sql = "select * from book where bookno=" + bookno; try { resultSet = statement.executeQuery(sql); while (resultSet.next()) { bookInfo = new BookInfo(resultSet.getInt(1), resultSet .getInt(2), resultSet.getString(3), resultSet .getString(4), resultSet.getString(5), resultSet .getString(6), resultSet.getString(7), resultSet .getFloat(8)); } } catch (SQLException e) { e.printStackTrace(); } return bookInfo; } public List<BookInfo> showCatagoryBook(int crono) { List<BookInfo> list = new ArrayList<BookInfo>(); String sql = "select * from book where crono=" + crono; try { resultSet = statement.executeQuery(sql); while (resultSet.next()) { list.add(new BookInfo(resultSet.getInt(1), resultSet.getInt(2), resultSet.getString(3), resultSet.getString(4), resultSet.getString(5), resultSet.getString(6), resultSet.getString(7), resultSet.getFloat(8))); } } catch (SQLException e) { e.printStackTrace(); } return list; } }