被appframe.BeanUtils重载，涉及bean的属性的操作
PropertyUtils
作用：属性的get和set操作属性分为四种:simple（String），index(List)，map(Map),Object，都可以用以下方法获得：
String city = (String) PropertyUtils.getProperty(employee,
"subordinate[3].address(home).city");
类似 employee.getSubordinate[3].getAddress(home).getCity();
DynaBean
当bean的属性是动态生成的，如；representing the result set of an SQL select as a set of JavaBeans。该bean需要实现DynaBean接口,常用于包装其他集合(resultSet，map)为bean步骤：先使用DynaClass创建一个包含DynaProperty的类；再产生对象赋值给DynaBean;使用PropertyUtils实现动态的get和set
如包装ResultSet：
RowSetDynaClass rsdc = new RowSetDynaClass(rs);
List rows = rsdc.getRows();
WrapDynaBean and WrapDynaClass：包装已存在的javabean，转换其为DynaBean.- 1. LazyDynaBean - A Lazy DynaBean
- 2. LazyDynaMap - A light weight DynaBean facade to a Map with lazy map/list processing
- 3. LazyDynaList - A lazy list for DynaBean's, java.util.Map's or POJO beans.
- 4. LazyDynaClass - A MutableDynaClass implementation.
Collections
BeanComparator基于Bean的公有属性的ComparatorBeanPropertyValueChangeClosure用于设置Bean的属性值，常和CollectionUtils组合使用设置Collection中所有Bean的某一属性。如设置所有Collection中的activeEmployee属性为true
BeanPropertyValueChangeClosure closure =
new BeanPropertyValueChangeClosure( "activeEmployee", Boolean.TRUE );
// update the Collection
CollectionUtils.forAllDo( peopleCollection, closure );
l BeanPropertyValueEqualsPredicate 判断属性值是否为某一只.可以用于Collections的过滤，如得到Collections所有activeEmployee属性为true的bean: BeanPropertyValueEqualsPredicate predicate =
new BeanPropertyValueEqualsPredicate( "activeEmployee", Boolean.FALSE );
// filter the Collection
CollectionUtils.filter( peopleCollection, predicate );
- l
BeanToPropertyTransformer得到Bean 属性的取值.
// create the transformer
BeanToPropertyValueTransformer transformer = new BeanToPropertyValueTransformer( "person.address.city" );
// transform the Collection,peoplesCities只包含city的集合
Collection peoplesCities = CollectionUtils.collect( peopleCollection, transformer );
一个比较常用的功能是Bean Copy，也就是copy bean的属性。如果做分层架构开发的话就会用到，比如从PO（Persistent Object）拷贝数据到VO（Value Object）。
//得到TeacherForm
TeacherForm teacherForm=(TeacherForm)form;
//构造Teacher对象
Teacher teacher=new Teacher();
//赋值
BeanUtils.copyProperties(teacher,teacherForm);
//持久化Teacher对象到数据库
HibernateDAO= HibernateDAO.save(teacher);
copyProperties()方法还可以将一个Map的内容复制进bean中,前提是Map各键一一对应于目的
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