Java反射机制

public class TestHibernate {

    @Test

    public void TestHb(){

        try {

            Class cs = Class.forName("testHibernate.Test1");    //classload 类

            Object oj = cs.newInstance();                        //通过类NEW一个对象

            Method[] mt = cs.getMethods();                        //获取所有方法

            for (Method method : mt) {                            //轮询出所有函数方法

                if(method.getName()=="m13"){                    //通过函数名判断函数

                    method.invoke(oj,1,2);

                    for(Class parameter:method.getParameterTypes()){    //轮询出函数方法的参数

                    System.out.println(parameter.getName());            //获取参数类型

                    }

                    System.out.println("返回值"+method.getReturnType());    //获取返回值类型

                }else if(method.getName()=="m12"){

                    method.invoke(oj);                            //执行函数方法无参

                }else if(method.getName()=="getmeth"){

                    System.out.println("123"+method.getReturnType());

                    Object object = method.invoke(oj);            //获取函数方法返回的类对象

                    Class ccc = object.getClass();                //通过类对象获得类

                    Field ff = ccc.getField("x2");             //获取变量对象

                     int x1 = (int)ff.get(object);                //获取属性值

                    //getDeclaredMethod可获取私有方法

                    Method met = ccc.getDeclaredMethod("xxx",new Class[]{int.class,int.class});

                    met.setAccessible(true);//设置可成 可访问

                    Object i = met.invoke(object, x1,2);//调用带参函数方法

                    System.out.println(i+"xxxxxxxxxxxxxxxxxxxxxxxxxx");

                }

            }

        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException | SecurityException | NoSuchMethodException | NoSuchFieldException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

}

class Test2{

    static{

        System.out.println("classLoad  test2");

    }

    public int x2 = 3;

    private int xxx(int x1,int x2){

        return x1*x2;

    }

}

class Test1{

    static{

        System.out.println("classLoad  test1");

    }

    {

        System.out.println("new objcet  tset1");

    }

    public Test2 getmeth(){

        return new Test2();

    }

    public void m12(){

        System.out.println("m12");

    }

    public String m13(int b,int r){

        System.out.println(b+r);

        return b+r+"";

    }

}