package bookshop.run;/** * <p>Title: </p> */import java.util.*;import bookshop.util.*;import bookshop.book.*;import java.sql.*;import java.lang.String;import javax.servlet.http.HttpServletRequest;public class op_bookclass extends DataBase{  public op_bookclass() {  }  private bookclass bookclass = new bookclass(); //新的圖書(shū)分類(lèi)  private javax.servlet.http.HttpServletRequest request; //建立頁(yè)面請(qǐng)求  private Vector classlist;		//圖書(shū)類(lèi)別向量數(shù)組  public Vector getClasslist() {        return classlist;          }  public String getBookClassSql() {                  sqlStr = "select id,classname from bookclass order by id";                  return sqlStr;          }          //查詢(xún)圖書(shū)分類(lèi)  public boolean seachBookClass() throws Exception {                  int id = 0;                  String classname = "";                  int rscount = 0;                  try {                  DataBase db = new DataBase();                  db.connect();                  stmt = db.conn.createStatement ();                  rs = stmt.executeQuery(getBookClassSql());                  rscount = stmt.getMaxRows();                  classlist = new Vector(rscount+1);                  classlist.clear();                  while (rs.next()){                                  id = rs.getInt("id");                                  classname = rs.getString("classname");                                  bookclass bc = new bookclass(id,classname);                                  classlist.addElement(bc);                          }                          rs.close();                          return true;                  }                  catch (SQLException sqle){                          System.out.println(sqle);              return false;                  }          }          //添加新圖書(shū)分類(lèi)時(shí)獲得頁(yè)面轉(zhuǎn)遞的分類(lèi)名稱(chēng)public boolean getRequest(javax.servlet.http.HttpServletRequest newrequest) {     boolean flag = false;     try{         request = newrequest;         String bookclassname = request.getParameter("bookclassname");          if (bookclassname==null || bookclassname.equals("")){              bookclassname = "";              flag = false;              }              bookclass.setClassName(bookclassname);              return true;          }catch (Exception e){            return false;            }    }    //添加新的圖書(shū)分類(lèi)        public boolean insert() throws Exception {           sqlStr = "insert into bookclass (classname) values ('";           sqlStr = sqlStr + dataFormat.toSql(bookclass.getClassName()) + "')";                      try                      {      System.out.print(sqlStr);                        DataBase db = new DataBase();                              db.connect();                              stmt =db.conn.createStatement ();                              stmt.execute(sqlStr);                              return true;                      }                      catch (SQLException sqle)                      {        System.out.print(sqle.getMessage());                              return false;                      }              }          //添加新的圖書(shū)分類(lèi)          public boolean delete( int aid ) throws Exception {               sqlStr = "delete from bookclass where id = "  + aid ;               try               {         DataBase db = new DataBase();                          db.connect();                          stmt =db.conn.createStatement ();                       stmt.execute(sqlStr);                       return true;               }               catch (SQLException e)               {                       System.out.println(e);                       return false;               }       }  };