Commons BeanUtils 中对Map的操作
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Commons BeanUtils 中对Map的操作
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<span class="link_postdate">2011-08-18 10:32</span>
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populate(bean,map) 将Map中的值设入bean中
- BeanUtils.populate(bean, request.getParameterMap());
PropertyUtils.describe() 方法将返回bean中每个可读的属性都添加到Map中去.如果值为设置,将返回默认值,在上面的例子中假如Book类中还有个Integer型的page属性,代表书籍页数.在没设置的情况下,将返回null.如果page属性为int型,则将返回0
摘自：http://www.blogjava.NET/hexuzhong/archive/2005/11/30/21925.html
- Person author = new Person();
- author.setName("Timothy M. O'Brien");
- Book book = new Book();
- book.setName("Jakarta Commons Cookbook");
- book.setAuthor(author);
- // 取得book中的所有可读属性,返回到map中
- Map bookMap = PropertyUtils.describe(book);
- // Book类中包含一个Author类型的属性
- // 取bookMap中的author bean,并将其所有可读属性返回到authorMap中
- Map authorMap = PropertyUtils.describe(bookMap.get("author"));
- // 输出
- // Book Name: Jakarta Commons Cookbook
- // Author Name: Timothy M. O'Brien
- System.out.println("Book Name: " + bookMap.get("name"));
- System.out.println("Author Name: " + authorMap.get("name"));
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