package com.zheges;import java.util.Date;public class Customer {//JavaBean 對象	PRivate String name;	private int passWord;	public String present = "God";	private Date date;		@Override	public String toString() {		return "Customer [name=" + name + ", password=" + password				+ ", present=" + present + ", date=" + date + "]";	}		public String getPresent() {		return present;	}	public void setPresent(String present) {		this.present = present;	}	public String getName() {		return name;	}	public Date getDate() {		return date;	}	public void setDate(Date date) {		this.date = date;	}	public void setName(String name) {		this.name = name;	}	public int getPassword() {		return password;	}	public void setPassword(int password) {		this.password = password;	}	public String getAB(){		return "AB";	}}

package com.zheges;import static org.junit.Assert.assertEquals;//靜態導入Assert所有靜態方法import java.lang.reflect.Field;import org.junit.Before;import org.junit.Test;/*** 項目名稱：Reflection  * 類名稱：FirDemo  * 類描述：反射的基本應用* 創建人：ZHe  * 創建時間：2015年8月29日 下午5:01:43  * 修改人：ZHe  * 修改時間：2015年8月29日 下午5:01:43  */public class FirDemo {		private Class<?> clazz;//類的字節碼	private Customer customer = new Customer();		/**	 * 1.加載類，并且獲得類的字節碼	 * @throws ClassNotFoundException 	 */	@Before	public void getClassLoader() throws ClassNotFoundException {		//1.使用Class的靜態方法加載		clazz = Class.forName("com.zheges.Customer");//注意：這里要使用類的全名		//2.通過類對象獲得其字節碼		clazz = new Customer().getClass();		//3.通過類的靜態屬性獲得		clazz = Customer.class;				assertEquals("com.zheges.Customer",clazz.getName());	}		/**	 * 2.獲得類的字段(注意：不等同于屬性，屬性由getter來確定！)	 * @throws SecurityException 	 * @throws NoSuchFieldException 	 * @throws IllegalaccessException 	 * @throws IllegalArgumentException 	 */	@Test	public void getClassProperties() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException{				//1.獲得私有字段及其類型		Field field = clazz.getDeclaredField("name");		Class<?> type = field.getType();		assertEquals(String.class, type);				//2.獲得公有字段及其類型		Field field1 = clazz.getField("present");		Class<?> type1 = field1.getType();		assertEquals(String.class, type1);				//3.true if this object is the same as the obj argument; false otherwise.		assertEquals(true, field.equals(clazz.getDeclaredField("name")));				//4.設置某個對象上該字段的值		field.setAccessible(true);//該字段是私有的,需要設置setAccessible		field.set(customer,"ZheGes");				field1.set(customer, "Nor");				assertEquals(customer.getName(), "ZheGes");		assertEquals(customer.getPresent(), "Nor");				//5.獲取某個對象上該字段的值		assertEquals(field.get(customer), "ZheGes");//前提是該私有變量設置了Accessible		assertEquals(field1.get(customer), "Nor");	}}

package com.zheges;import java.beans.BeanInfo;import java.beans.IntrospectionException;import java.beans.Introspector;import java.beans.PropertyDescriptor;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import static org.junit.Assert.*;import org.junit.Ignore;import org.junit.Test;/*** 項目名稱：Reflection  * 類名稱：SecDemo  * 類描述：反射高級應用：內省* 創建人：ZHe  * 創建時間：2015年8月29日 下午5:03:02  * 修改人：ZHe  * 修改時間：2015年8月29日 下午5:03:02  */public class SecDemo {	//內省：通過反射的方式訪問javabean的技術	//JavaBean:1.必須有無參的構造函數 2.屬性必須私有（屬性數目由get數目來定，并非由字段來定！）3.提供標準的getter和setter		//1.打印Customer的所有屬性(包含Object的屬性)	/*result:			    AB-----Customer getter				class ----Object getter,getClass---->這個方法是繼承Object的				date				name				password				present*/	@Ignore	public void getProperties() throws IntrospectionException{		BeanInfo beanInfo = Introspector.getBeanInfo(Customer.class);		PropertyDescriptor [] propertyDescriptors = beanInfo.getPropertyDescriptors();		for (PropertyDescriptor propertyDescriptor : propertyDescriptors) {			System.out.println(propertyDescriptor.getName());		}	}		//2.打印Customer的所有屬性（不包含Object的屬性）	@Ignore	public void getOwnProperties() throws IntrospectionException{		BeanInfo beanInfo = Introspector.getBeanInfo(Customer.class,Object.class);		PropertyDescriptor [] propertyDescriptors = beanInfo.getPropertyDescriptors();		for (PropertyDescriptor propertyDescriptor : propertyDescriptors) {			System.out.println(propertyDescriptor.getName());		}	}		//3.操作JavaBean的指定屬性	@Test	public void actProperty() throws IntrospectionException, IllegalAccessException, IllegalArgumentException, InvocationTargetException{		Customer customer = new Customer();				PropertyDescriptor propertyDescriptor = new PropertyDescriptor("name", Customer.class);		Method method = propertyDescriptor.getWriteMethod();		method.invoke(customer, "zheGes");				Method method2 = propertyDescriptor.getReadMethod();		System.out.println(method2.invoke(customer, null));	}		//4.獲得當前操作屬性的類型	@Ignore	public void getPropertyType() throws IntrospectionException{		PropertyDescriptor propertyDescriptor = new PropertyDescriptor("name", Customer.class);		assertEquals(String.class, propertyDescriptor.getPropertyType());	}	}

package com.zheges;import static org.junit.Assert.assertTrue;import java.lang.reflect.InvocationTargetException;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.beanutils.ConversionException;import org.apache.commons.beanutils.ConvertUtils;import org.apache.commons.beanutils.Converter;import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;import org.junit.Ignore;import org.junit.Test;/*** 項目名稱：Reflection  * 類名稱：ThrDemo  * 類描述：反射的高級應用2：BeanUtils* 創建人：ZHe * 創建時間：2015年8月29日 下午5:50:20  * 修改人：ZHe  * 修改時間：2015年8月29日 下午5:50:20  */public class ThrDemo {	private Customer customer = new Customer();		//1.BeanUtils操作屬性	@Ignore	public void actProperty() throws IllegalAccessException, InvocationTargetException, Exception{				BeanUtils.setProperty(customer, "name", "ZHeGes");		BeanUtils.setProperty(customer, "password", "404");//發生了String轉int，但這種轉換只支持8種基礎類型！				System.out.println(BeanUtils.getProperty(customer, "name")+" "+				BeanUtils.getProperty(customer, "password"));	}		//2.對于非基礎類型的轉換，則要給BeanUtils注冊轉換器	@Ignore	public void registConver() throws Exception {				//注冊一個日期轉換器,Converter接口，使用匿名內部類實現		ConvertUtils.register(new Converter(){			@Override			public Object convert(Class type, Object value) {				if(null == value){					return null;				}				if( !(value instanceof String)){					throw new ConversionException("只支持String類型的轉換");				}				String str = (String)value;				SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");								try {					return simpleDateFormat.parse(str);				} catch (ParseException e) {					throw new RuntimeException(e);//異常鏈不能斷！				}			}					}, Date.class);				BeanUtils.setProperty(customer, "date", "1992-3-18");		//The property's value, converted to a String		System.out.println(BeanUtils.getProperty(customer, "date"));		System.out.println(customer.getDate().toLocaleString());	}		//3.使用Apach公司提供的日期轉換器	@Ignore	public void registConver2() throws Exception{		ConvertUtils.register(new DateLocaleConverter(), Date.class);		BeanUtils.setProperty(customer, "date", "1992-3-18");		System.out.println(customer.getDate().toLocaleString());	}		//4.使用BeanUtils將Map對象填充到JavaBean	@Ignore	public void usePopulate() throws Exception{		Map map = new HashMap<>();		map.put("name", "ZheGes");		map.put("password", "123");		map.put("date", "1992-2-1");				//日期轉換器		ConvertUtils.register(new DateLocaleConverter(), Date.class);				BeanUtils.populate(customer, map);		System.out.println(customer);	}			@Test	public void test(){		String str = "hell";		String str1 = str;		str = "wofl";		System.out.println(str+" "+str1);	}		@Ignore	public void test2(){		Class<String> t1 = String.class;		//Class<String> t2 = Date.class;      false：加了類型約束，必須是類String的字節碼，否則報錯！		Class t3 = String.class;		assertTrue(t1 == t3);	}}