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看到网上好多有struts2中从后台读取数据到<s:select>的,但都 不太详细,可能是我自己理解不了吧!所以我自己做了 一个,其中可能 有很多不好的地方,望广大网友指出
结果如图
public class Books implements java.io.Serializable { // Fields private String bookId; private String bookType; private String bookName; private String bookAuthor; private String bookPress; private Float bookPrice; private Integer bookNumber; private Set readers = new HashSet(); //省略相应的set和get方法 }
impl中
//查询所有的图书类型 public List findBookType() { Session session = HibernateSessionFactory.getSession(); Transaction tx = session.beginTransaction(); String hql="from Books group by bookType"; Query query = session.createQuery(hql); List list = query.list(); return list; }
Action中
public String findBookType() { String result="error"; List list = null; BooksDao booksDao =new BooksImpl(); list = booksDao.findBookType(); if(list!=null) { ActionContext ctx = ActionContext.getContext(); Map map = ctx.getSession(); map.put("bookType", list); //result="error"; System.out.println("--->"+list.size()); } return result; }
jsp中
<s:select label="类别" name="books.bookType" list="#session.bookType" listKey="id" listValue="bookType" headerKey="-1" headerValue="请选择书的类别" emptyOption="false" />
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原文地址:http://www.cnblogs.com/xiaolonghome/p/zxl.html