mainframe.java

采用java+sql实现图书管理系统

      ReaderDelete ReaderDeleteFrame = new ReaderDelete();
      Dimension FrameSize = ReaderDeleteFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      ReaderDeleteFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                  loc.x,
                                  (MainFrameSize.height - FrameSize.height) / 2 +
                                  loc.y);
      ReaderDeleteFrame.pack();
      ReaderDeleteFrame.show();
    }
    else if (e.getActionCommand() == "添加书籍") {
      BookAdd BookAddFrame = new BookAdd();
      Dimension FrameSize = BookAddFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      BookAddFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                               loc.x,
                               (MainFrameSize.height - FrameSize.height) / 2 +
                               loc.y);
      BookAddFrame.pack();
      BookAddFrame.show();
    }
    else if (e.getActionCommand() == "修改书籍") {
      BookModify BookModifyFrame = new BookModify();
      Dimension FrameSize = BookModifyFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      BookModifyFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                  loc.x,
                                  (MainFrameSize.height - FrameSize.height) / 2 +
                                  loc.y);
      BookModifyFrame.pack();
      BookModifyFrame.show();
    }
    else if (e.getActionCommand() == "删除书籍") {
      BookDelete BookDeleteFrame = new BookDelete();
      Dimension FrameSize = BookDeleteFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      BookDeleteFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                  loc.x,
                                  (MainFrameSize.height - FrameSize.height) / 2 +
                                  loc.y);
      BookDeleteFrame.pack();
      BookDeleteFrame.show();
    }
    else if (e.getActionCommand() == "书籍出借") {
      BorrowBook BorrowBookFrame = new BorrowBook();
      Dimension FrameSize = BorrowBookFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      BorrowBookFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                  loc.x,
                                  (MainFrameSize.height - FrameSize.height) / 2 +
                                  loc.y);
      BorrowBookFrame.pack();
      BorrowBookFrame.show();
    }
    else if (e.getActionCommand() == "出借信息修改") {
      BorrowInfo BorrowInfoFrame = new BorrowInfo();
      Dimension FrameSize = BorrowInfoFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      BorrowInfoFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                  loc.x,
                                  (MainFrameSize.height - FrameSize.height) / 2 +
                                  loc.y);
      BorrowInfoFrame.pack();
      BorrowInfoFrame.show();
    }
    else if (e.getActionCommand() == "书籍还入") {
      ReturnBook ReturnBookFrame = new ReturnBook();
      Dimension FrameSize = ReturnBookFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      ReturnBookFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                  loc.x,
                                  (MainFrameSize.height - FrameSize.height) / 2 +
                                  loc.y);
      ReturnBookFrame.pack();
      ReturnBookFrame.show();
    }
    else if (e.getActionCommand() == "书籍还入信息修改") {
      ReturnInfo ReturnInfoFrame = new ReturnInfo();
      Dimension FrameSize = ReturnInfoFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      ReturnInfoFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                  loc.x,
                                  (MainFrameSize.height - FrameSize.height) / 2 +
                                  loc.y);
      ReturnInfoFrame.pack();
      ReturnInfoFrame.show();
    }
    else if (e.getActionCommand() == "书籍信息查询") {
      BookList BookListFrame = new BookList();
      Dimension FrameSize = BookListFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      BookListFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                loc.x,
                                (MainFrameSize.height - FrameSize.height) / 2 +
                                loc.y);
      BookListFrame.pack();
      BookListFrame.show();
    }
    else if (e.getActionCommand() == "借阅信息查询") {
      BorrowBookList BorrowBookListFrame = new BorrowBookList();
      Dimension FrameSize = BorrowBookListFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      BorrowBookListFrame.setLocation( (MainFrameSize.width - FrameSize.width) /
                                      2 + loc.x,
                                      (MainFrameSize.height - FrameSize.height) /
                                      2 + loc.y);
      BorrowBookListFrame.pack();
      BorrowBookListFrame.show();
    }
    else if (e.getActionCommand() == "用户列表") {
      UserList UserListFrame = new UserList();
      Dimension FrameSize = UserListFrame.getPreferredSize();
      Dimension MainFrameSize = getSize();
      Point loc = getLocation();
      UserListFrame.setLocation( (MainFrameSize.width - FrameSize.width) / 2 +
                                loc.x,
                                (MainFrameSize.height - FrameSize.height) / 2 +
                                loc.y);
      UserListFrame.pack();
      UserListFrame.show();
    }
    else if (e.getActionCommand() == "关于") {
      String str = "本程序为图书馆管理系统,可以实现图书的查询管理等功能\n";
      JOptionPane.showMessageDialog(null, str, "关于",
                                    JOptionPane.INFORMATION_MESSAGE);
    }
    else if (e.getActionCommand() == "退出") {
      this.dispose();//关闭窗体并释放该窗体的占用的部分资源
      System.exit(0);
    }
  }

  //--设置登录用户的权限--
  public void setEnable(String powerType) {//系统管理员具有全部的权限
    if (powerType.trim().equals("系统管理员")) {
      userMGRMenu.setEnabled(true);
      readerMGRMenu.setEnabled(true);
      bookMGRMenu.setEnabled(true);
      borrowBookMenu.setEnabled(true);
      returnBookMenu.setEnabled(true);
      infoBrowseMenu.setEnabled(true);
      userListMenuItem.setEnabled(true);
      aboutMenu.setEnabled(true);
    }
    else if (powerType.trim().equals("书籍管理员")) {//书籍管理员拥有书籍管理和信息查询权限
      userMGRMenu.setEnabled(false);
      readerMGRMenu.setEnabled(false);
      bookMGRMenu.setEnabled(true);
      borrowBookMenu.setEnabled(false);
      returnBookMenu.setEnabled(false);
      infoBrowseMenu.setEnabled(true);
      userListMenuItem.setEnabled(false);
      aboutMenu.setEnabled(true);
    }
    else if (powerType.trim().equals("借阅管理员")) {//借阅管理员拥有借书管理、还书管理和信息查询权限
      userMGRMenu.setEnabled(false);
      readerMGRMenu.setEnabled(false);
      bookMGRMenu.setEnabled(false);
      borrowBookMenu.setEnabled(true);
      returnBookMenu.setEnabled(true);
      infoBrowseMenu.setEnabled(true);
      userListMenuItem.setEnabled(false);
      aboutMenu.setEnabled(true);
    }
    else if (powerType.trim().equals("读者")) {//读者拥有信息查询权限
      userMGRMenu.setEnabled(false);
      readerMGRMenu.setEnabled(false);
      bookMGRMenu.setEnabled(false);
      borrowBookMenu.setEnabled(false);
      returnBookMenu.setEnabled(false);
      infoBrowseMenu.setEnabled(true);
      aboutMenu.setEnabled(true);
    }
  }

  public static void main(String args[]) {
    try {//把外观设置成所使用的平台的外观
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch (Exception e) {
      e.printStackTrace();
    }

    MainFrame mainFrame = new MainFrame();
    mainFrame.setSize(400,300);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    mainFrame.setLocation( (d.width - mainFrame.getSize().width) / 2,
                      (d.height - mainFrame.getSize().height) / 2);
    mainFrame.show();
  }
}