9.3 Java反射reflect

package com.imooc.reflect; import com.imooc.reflect.entity.Employee; import java.lang.reflect.Constructor; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; /** * 获取对象所有成员变量值 */ public class getDeclaredSample { public static void main(String[] args) { try { Class employeeClass = Class.forName("com.imooc.reflect.entity.Employee"); Constructor constructor = employeeClass.getConstructor(new Class[]{ Integer.class, String.class, Float.class, String.class }); Employee employee = (Employee) constructor.newInstance(new Object[]{ 100, "李磊", 3000f, "研发部" }); //获取当前类所有成员变量 Field[] fields = employeeClass.getDeclaredFields(); for(Field field : fields){ // System.out.println(field.getName()); if(field.getModifiers() == 1){ //pubilc修饰 Object val = field.get(employee); System.out.println(field.getName() + ":" + val); }else if(field.getModifiers() == 2){ //private修饰 String methodName = "get" + field.getName().substring(0,1).toUpperCase() + field.getName().substring(1); Method getMethod = employeeClass.getMethod(methodName); Object ret = getMethod.invoke(employee); System.out.println(field.getName() + ":" + ret); } } } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } }