java内省

参考连接：https://blog.csdn.net/qiaolovemath/article/details/50454400?depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-5&utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-5

package com.siyuan.jdktest;

import java.beans.BeanDescriptor;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.MethodDescriptor;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;

class Person {
 
 private String name;
 
 private int age;

 
 public int getAge() {
  return age;
 }

 
 public void setAge(int age) {
  this.age = age;
 }

 
 public String getName() {
  return name;
 }

 
 public void setName(String name) {
  this.name = name;
 }
 
}

public class IntrospectorTest {

 
 public static void main(String[] args) throwsIntrospectionException {
  // TODO Auto-generated methodstub
  BeanInfo beanInfo =Introspector.getBeanInfo(Person.class);
  
  System.out.println("BeanDescriptor===========================================");
  BeanDescriptor beanDesc =beanInfo.getBeanDescriptor();
  Class cls =beanDesc.getBeanClass();
  System.out.println(cls.getName());
  
  System.out.println("MethodDescriptor===========================================");
  MethodDescriptor[] methodDescs= beanInfo.getMethodDescriptors();
  for (int i = 0; i< methodDescs.length; i++) {
   Method method= methodDescs[i].getMethod();
   System.out.println(method.getName());
  }
  
  System.out.println("PropertyDescriptor===========================================");
  PropertyDescriptor[] propDescs= beanInfo.getPropertyDescriptors();
  for (int i = 0; i< propDescs.length; i++) {
   MethodmethodR = propDescs[i].getReadMethod();
   if (methodR!= null) {
    System.out.println(methodR.getName());
   }
   MethodmethodW = propDescs[i].getWriteMethod();
   if (methodW!= null) {
    System.out.println(methodW.getName());
   }
  }
 }

}

3. 运行结果

 

BeanDescriptor===========================================
com.siyuan.jdktest.Person
MethodDescriptor===========================================
hashCode
setAge
equals
wait
wait
notify
getClass
toString
getAge
notifyAll
setName
wait
getName
PropertyDescriptor===========================================
getAge
setAge
getClass
getName
setName