public class Admin {//省略getset等通用方法	private int id;	private String username;	private String pwd;	private Date date;}public class APP {	@Test	public void testBeanUtils() throws Exception, InvocationTargetException{		Admin admin = new Admin();		//方式1		admin.setUsername("妹子");		admin.setPwd("123");		System.out.println(admin);				//方式2		BeanUtils.copyProperty(admin, "username", "zhangsan");		BeanUtils.setProperty(admin, "pwd", "5555");		System.out.println(admin.getUsername());		System.out.println(admin.getPwd());				//方式3		Map<String,Object> map = new HashMap<>();		map.put("username", "zhangsan");		map.put("pwd", "586665");		BeanUtils.populate(admin, map);		System.out.println(admin);				//方式4  Date 转化  ,需要注册一个转化器		ConvertUtils.register(new DateConvert_MY(), Date.class);		Map<String,Object> map2= new HashMap<>();		map2.put("username", "zhangsan");		map2.put("pwd", "586665");		map2.put("date", "2016-09-24");		BeanUtils.populate(admin, map2);		System.out.println(admin);	}	}class DateConvert_MY implements Converter{	@Override	public Object convert(Class type, Object value) {		if(Date.class != type) return null;		if(null == value || "".equals(value.toString().trim())) return null;		try {			return new SimpleDateFormat("yyyy-MM-dd").parse(value.toString());		} catch (ParseException e) {			throw new RuntimeException(e);		}	}}