1 import java.beans.BeanInfo; 2 import java.beans.IntrospectionException; 3 import java.beans.Introspector; 4 import java.beans.PropertyDescriptor; 5 import java.lang.reflect.Method; 6  7 import org.junit.Test; 8  9 //使用内省api操作bean的属性10 public class Demo {11 12     /**13      * 14      * @throws Exception 15      *16      */17     //得到bean的所有属性18     @Test19     public void test1() throws Exception{20         BeanInfo info = Introspector.getBeanInfo(Person.class,Object.class);21         22         PropertyDescriptor[] pds = info.getPropertyDescriptors();23         24         for(PropertyDescriptor pd : pds){25             System.out.println(pd.getName());26         }27     }28     29     //操纵bean的指定属性:age30     @Test31     public void test2() throws Exception{32         33         Person p = new Person();34         35         PropertyDescriptor pd = new PropertyDescriptor("age", Person.class);36         37         //得到属性的写方法，为属性复制38         Method method = pd.getWriteMethod();//public void setAge(){}39         40         method.invoke(p, 32);41         42         //获取属性的值43         method = pd.getReadMethod();//public void getAge(){}44         System.out.println(method.invoke(p, null));45         46         47     }48     49     //高级点的内容，获取当前操作属性的类型50     @Test51     public void test3() throws Exception{52         53         Person p = new Person();54         55         PropertyDescriptor pd = new PropertyDescriptor("age", Person.class);56         57         System.out.println(pd.getPropertyType());58     }59 60     61 }

 1 public class Person {// javabean 2  3     private String name; 4     private String password; 5     private int age; 6  7     public String getName() { 8         return name; 9     }10 11     public void setName(String name) {12         this.name = name;13     }14 15     public String getPassword() {16         return password;17     }18 19     public void setPassword(String password) {20         this.password = password;21     }22 23     public int getAge() {24         return age;25     }26 27     public void setAge(int age) {28         this.age = age;29     }30     31     public String getAb(){32         return null;33     }34 35 36 }