ioc解析java反摄机制

package com.ioc;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;

/**
 * java反射
 *
 */
public class Car {
 private Integer no;
 private String name;
 private String color;

 public Car() {

 }

 public Car(Integer no, String name, String color) {
  this.no = no;
  this.name = name;
  this.color = color;
 }

 public Integer getNo() {
  return no;
 }

 public void setNo(Integer no) {
  this.no = no;
 }

 public String getName() {
  return name;
 }

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

 public String getColor() {
  return color;
 }

 public void setColor(String color) {
  this.color = color;
 }

 public static void main(String[] args) throws Exception {
  // 获取类装载器
  ClassLoader loader = Thread.currentThread().getContextClassLoader();
  // 通过类装载器获取对象
  Class clazz = loader.loadClass("com.ioc.Car");
  // 获取类的默认构造器对象
  Constructor cons = clazz.getDeclaredConstructor();// 无参构造函数
  // 实例化对象
  Car car = (Car) cons.newInstance();
  // 有参构造函数
  // Constructor cons = clazz.getDeclaredConstructor(Integer.class,
  // String.class, String.class);
  // Car car = (Car) cons.newInstance(1,"a","b");
  // 通过反射方法设置属性
  Method setNo = clazz.getMethod("setNo", Integer.class);
  setNo.invoke(car, 1);
  Method setColor = clazz.getMethod("setColor", String.class);
  setColor.invoke(car, "黑色");
  Method setName = clazz.getMethod("setName", String.class);
  setName.invoke(car, "别克");
  System.out.println(car.getNo() + "|" + car.getColor() + "|"
    + car.getName());
 }
}