内省操作javabean属性

内省操作javabean属性，javabean person类。

public class person {
	private string name;
	private string password;
	private int age;
	
	public string getab(){
		return null;
	}
	
	public string getname() {
		return name;
	}

	public void setname(string name) {
		this.name = name;
	}

	public string getpassword() {
		return password;
	}

	public void setpassword(string password) {
		this.password = password;
	}

	public int getage() {
		return age;
	}

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

内省操作

import java.beans.beaninfo;
import java.beans.introspector;
import java.beans.propertydescriptor;
import java.lang.reflect.method;

import org.junit.test;

//使用内省api操作bean的属性
public class demo1 {

	// 得到bean的所有属性
	@test
	public void test1() throws exception {

		beaninfo info = introspector.getbeaninfo(person.class, object.class);
		propertydescriptor[] pds = info.getpropertydescriptors();

		for (propertydescriptor pd : pds) {
			system.out.println(pd.getname());
		}
	}

	// 得到bean的指定属性：get
	@test
	public void test2() throws exception {

		person p = new person();

		propertydescriptor pd = new propertydescriptor("age", person.class);
		// 得到属性的写方法，为属性赋值
		method method = pd.getwritemethod(); // setage

		method.invoke(p, 45);
		// system.out.println(p.getage());

		// 获取属性值
		method = pd.getreadmethod();
		system.out.println(method.invoke(p, null));
	}
	
	//获取当前操作属性的类型
	@test
	public void test3() throws exception {

		person p = new person();

		propertydescriptor pd = new propertydescriptor("age", person.class);
		system.out.println(pd.getpropertytype());
	}
}