getter和setter怎么用_python setter

import com.pibgstar.demo.bean.User;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/** * @author pibigstar * @create 2018-12-03 18:36 * @desc **/
public class TestPropertyDescriptor { 

public static void main(String[] args){ 

TestPropertyDescriptor test = new TestPropertyDescriptor();
User user = new User();
user.setId("123");
Object id = test.getAttribute("id", user);
System.out.println("id:"+id.toString());
test.setAttribute("name",user,"pibigstar");
System.out.println(user);
}
/** * @Author:pibigstar * @Description: 根据字段获取属性值 */
private Object getAttribute(String filed,Object obj) { 

try { 

PropertyDescriptor pd = new PropertyDescriptor(filed,obj.getClass());
// 获取getter方法
Method method = pd.getReadMethod();
Object result = method.invoke(obj);
return result;
} catch (IntrospectionException | IllegalAccessException | InvocationTargetException e) { 

e.printStackTrace();
}
return null;
}
/** * @Author:pibigstar * @Description: 设置属性字段值 */
private void setAttribute(String filed,Object obj,Object value) { 

try { 

PropertyDescriptor pd = new PropertyDescriptor(filed,obj.getClass());
// 获取setter方法
Method method = pd.getWriteMethod();
method.invoke(obj, value);
} catch (IntrospectionException | IllegalAccessException | InvocationTargetException e) { 

e.printStackTrace();
}
}
}

public class User { 

private String id;
private String name;
// setter/getter 方法
}

id:123
User{id='123', name='pibigstar'}