package action; import Bean.Book; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.ModelDriven; import org.apache.struts2.ServletActionContext; import javax.servlet.ServletContext; import javax.servlet.http.HttpServletRequest; import java.awt.*; import java.util.ArrayList; public class BookAction extends ActionSupport implements ModelDriven { private Book books = new Book(); private ArrayList<Book> book_list; public String bookkey=""; public String deleteBookId=""; @Override public Object getModel() { // TODO Auto-generated method stub return books; } public String Add() { try { if (ServletActionContext.getServletContext().getAttribute("booklist") == null) {//一本书都没有的时候 book_list = new ArrayList<Book>(); books.setBookId(0); book_list.add(0, books); ServletActionContext.getServletContext().setAttribute("booklist", book_list); } else { book_list = (ArrayList<Book>) ServletActionContext.getServletContext().getAttribute("booklist"); books.setBookId(book_list.size()); // String statecode=check(books); // if (statecode!=null){//不合法,阻断操作 // addActionMessage(statecode); // // // //弹回书籍信息 // HttpServletRequest request=ServletActionContext.getRequest(); // request.setAttribute("errbook", books); // return "input"; // } book_list.add(book_list.size(), books); System.out.print("图书:"+books.getBookName()+"\n"+books.getAuthor()+"\n"+books.getImage()+"\n"+books.getPrice()); ServletActionContext.getServletContext().setAttribute("booklist", book_list); } return SUCCESS; } catch (Exception exp) { System.out.print(exp.getCause()); return ERROR; } } private String check(Book book){//检查信息并返回错误信息 String result=""; if (book.getBookName()==null||book.getBookName().equals("")) result="书名不合法"; return result; } public String getBooklist() { try{ book_list=(ArrayList<Book>) ServletActionContext.getServletContext().getAttribute("booklist"); ServletActionContext.getRequest().setAttribute("bookdata", book_list); return "selected";} catch (Exception e){ return "error"; } } public void setBook_list(ArrayList<Book> book_list) { this.book_list = book_list; } public String Edit() { try { return SUCCESS; } catch (Exception exp) { return ERROR; } } public String delete(){ System.out.print("需要删除的书的信息如下"+deleteBookId); book_list=(ArrayList<Book>) ServletActionContext.getServletContext().getAttribute("booklist"); ArrayList<Book> newbook_list=new ArrayList<>(); for (Book i:book_list) { if (!deleteBookId.equals(""+i.getBookId())){ newbook_list.add(i); } System.out.print("书名"+i.getBookName()); } ServletActionContext.getServletContext().setAttribute("booklist", newbook_list); return "deletesuccess"; } public void setBookkey(String bookkey) { this.bookkey = bookkey; } }
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