1 import java.beans.BeanInfo; 2 import java.beans.Introspector; 3 import java.beans.PropertyDescriptor; 4 import java.lang.reflect.Method; 5 public class IntrospectorDemo { 6  7     public static void main(String[] args) { 8         // TODO Auto-generated method stub 9         IntrospectorDemo id=new IntrospectorDemo();10         try {11             id.test1();12             id.test2();13             id.test3();14             id.test4();15         } catch (Exception e) {16             // TODO Auto-generated catch block17             e.printStackTrace();18         }19     }20     21 22     public class Person23     {24         public Person(){25         }26         public Person(String name,int age){27             this.name=name;28             this.age=age;29         }30         private String name;31         private int age;32         public String getName() {33             return name;34         }35         public void setName(String name) {36             this.name = name;37         }38         public int getAge() {39             return age;40         }41         public void setAge(int age) {42             this.age = age;43         }44         45     }46      47         //获得person类的所有bean属性48          49         public void test1() throws Exception{50             BeanInfo info = Introspector.getBeanInfo(Person.class);51             PropertyDescriptor[] pds = info.getPropertyDescriptors();52             for(PropertyDescriptor pd:pds){53                 System.out.println(pd.getPropertyType()+" "+pd.getName());54             }55         }56         //获得Person（不包含Object类）的所有bean属性57          58         public void test2() throws Exception{59             BeanInfo info = Introspector.getBeanInfo(Person.class,Object.class);60             PropertyDescriptor[] pds = info.getPropertyDescriptors();61             for(PropertyDescriptor pd:pds){62                 System.out.println(pd.getPropertyType()+" "+pd.getName());63             }64         }65         //设置Person的age属性66          67         public void test3() throws Exception{68             Person p = new Person();69             PropertyDescriptor pd = new PropertyDescriptor("age", Person.class);70             Method method = pd.getWriteMethod();71             method.invoke(p, 20);72             System.out.println(p.getAge());73         }74         //调用Person的getAge()75          76         public void test4() throws Exception{77             Person p = new Person("xiazdong",30);78             PropertyDescriptor pd = new PropertyDescriptor("age", Person.class);79             Method method = pd.getReadMethod();80             System.out.println(method.invoke(p, null));81         }82      83 }