Java反射的应用1

徐海蛟 教学

1类名->对象

通过传入的类名，构建相应的对象。

import java.lang.reflect.*;

 

class Teacher {

       private String name;// 姓名

       private String university;// 毕业学校

       private String loc;// 所在地

 

       public Teacher() {}// 空构造器

       public Teacher(String name, String university, String loc) {

              this.name = name;

              this.university = university;

              this.loc = loc;

       }

 

       public String getInfo() {

              return "老师姓名：" + name + "，毕业学校：" + university + "，所在地：" + loc;

       }

}

 

public class TeacherFactory {// 老师工厂

       public static void main(String args[]) throws Exception {

              TeacherFactory app = new TeacherFactory();

              Object[] obj = { "徐海蛟", "华中科技大学", "深圳" };// 参数

              Teacher Teacher = (Teacher) app.create("Teacher", obj);

              System.out.print(Teacher.getInfo());

       }

 

       private Object create(String className, Object[] obj) throws Exception // 找到构造方法并构造

       {

              Class myClass = Class.forName(className);

              try {

                     Constructor cons = myClass.getConstructor(new Class[]{String.class, String.class, String.class});

                     return cons.newInstance(obj);

              } catch (Exception e) {

                     return myClass.newInstance();

              }

       }

}