Apache Commons BeanUtils 简单入门

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主要功能： 操作Bean的属性，针对Bean属性排序，Bean和Map的转换，创建动态的Bean等

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Person person = new Person();
person.setPid(100);
person.setPname("zhangsan");
Card card = new Card();
card.setCid(1000);
card.setCnumber("430221193332422135");
			
//根据反射获取属性值;
int pidValue = (Integer) PropertyUtils.getSimpleProperty(person,"pid");        //100
String pNameValue = (String) PropertyUtils.getSimpleProperty(person, "pname"); //zhangsan
			
//获取嵌套bean属性值;
Integer cid =(Integer) PropertyUtils.getNestedProperty(person, "card.cid");     //1000 
String number =(String) PropertyUtils.getNestedProperty(person, "card.cnumber");//430221193332422135
			
//根据反射获取数组，arrIndex代表bean里面定义的数组;
String arr = (String) PropertyUtils.getIndexedProperty(person, "arrIndex[0]"); //0
			
//获取属性类型;
Class<?> class1 = PropertyUtils.getPropertyType(person, "pname"); //java.lang.String
			
//获取map集合的值;map(name)，map是bean里面的集合名词，name是map集合中的key;
String value = (String) PropertyUtils.getMappedProperty(person, "map(name)");
			
//把bean里面所有的属性，包括数组，集合、bean等等;
Map personMap = PropertyUtils.describe(person);
			
//opyProperty()复制Bean属性,只复制引用，final类型和原始类型（primitive type）
PropertyUtils.copyProperties(person2, person1);

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