Jakarta Commons Cookbook讀書筆記系列
2.2 org.apache.commons.beanutils.BeanComparator比較Bean屬性
排序前
Book book
|--List authors
|--[0]->Person person1
|--String name->"LiLei"
|--[1]->Person person2
|--String name->"Ark"
|--[2]->Person person3
|--String name->"HanMeimei"
Comparator nameComparor=new BeanComparator("name");
Collections.sort(book.getAuthors(),nameComparor);
排序后
Book book
|--List authors
|--[0]->Person person1
|--String name->"Ark"
|--[1]->Person person2
|--String name->"HanMeimei"
|--[2]->Person person3
|--String name->"LiLei"
2.3 org.apache.commons.beanutils.collections.BeanMap 使用Map封裝Bean
封裝屬性
Person person=new Person();
person.setName("Heis");
person.setAge(50);
Map beanMap=new BeanMap(person);
Map beanMap
|--Entry(key->"name",value->"Heis")
|--Entry(key->"age",value->Integer(50))
getReadMethod(),getWriteMethod()取讀方法與寫方法
BeanMap beanMap=new BeanMap(person);
Method wMethod=beanMap.getWriteMethod("age");
wMethod.invoke(person,new Integer(24));
Method rMethod=beanMap.getReadMethod("age");
rMethod.invoke(person);->24
2.4 使用org.apache.commons.beanutils.DynaBean接口，可以在運(yùn)行時(shí)創(chuàng)建動(dòng)態(tài)Bean，而且創(chuàng)建的動(dòng)態(tài)bean可以與BeanUtils包內(nèi)的工具（如PropertyUtils等）結(jié)合使用。
DynaProperty[] beanProperties=new DynaProperty[]{
new DynaProperty("name",String.class),
new DynaProperty("age",Integer.class)};
//BasicDynaBean implements DynaBean
BasicDynaClass personClass=new BasicDynaClass("person",BasicDynaBean.class,beanProperties);
DynaBean person=BasicDynaClass.newInstance();
//set the properties
person.set("name","Heis");
PropertyUtils.setProperty(person,"age",new Integer(50));
2.5 使用BeanUtils以字符串形式訪問屬性
String ageStr=BeanUtils.getProperty(person,"age");
BeanUtils.setProperty(person,"age","50");
Jakarta Commons Cookbook讀書筆記系列
程序員的一生其實(shí)可短暫了，這電腦一開一關(guān)，一天過去了，嚎；電腦一開不關(guān)，那就成服務(wù)器了，嚎……