通过Java反射测试类私有成员（新）

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http://my.oschina.net/wangyumin/blog/387627
续上篇反射方式调用私有成员，最近对该方法进行了二次封装。

ReflectUtil.java

    //部份代码略

    /**
     * Invoking method plus
     *
     * @param object     Java object
     * @param methodName 方法名称
     * @param args       入参对象
     * @return 执行结果对象
     */
    public static Object invokeMethodPlus(Object object, String methodName, Object... args) {
        Object result = null;

        if (null != args) {
            int length = args.length;
            Class[] types = new Class[length];
            Object[] values = new Object[length];
            for (int i = 0; i < length; i++) {
                types[i] = args[i].getClass();
                values[i] = args[i];
                // 原始类型修补
                Field[] fields = types[i].getFields();
                for (Field field : fields) {
                    if ("TYPE".equalsIgnoreCase(field.getName())) {
                        try {
                            types[i] = (Class) field.get(null);
                        } catch (IllegalAccessException e) {
                            LogUtil.error(e);
                        }
                    }
                }
            }
            result = invokeMethod(object, methodName, types, values);
        }

        return result;
    }

新老方法对比：

// 老方法:
Object invokeMethod(Object object, String methodName, Class[] parameterTypes, Object[] args)

// 新方法(类型与入参不必分离由方法内部适配):
Object invokeMethodPlus(Object object, String methodName, Object... args)

ReflectUtilTest.java

    //部份代码略

    @Test
    public void testInvokeMethodPlusForInt() throws Exception {
        int age = 18;
        Person person = new Person();

        String howOldAreYou = (String) ReflectUtil.invokeMethodPlus(person, "howOldAreYou", age);

        Assert.assertEquals(Person.howOldAreYou + age, howOldAreYou);
    }

    @Test
    public void testInvokeMethodPlusForString() throws Exception {
        String name = "xuanyin";
        Person person = new Person();

        ReflectUtil.invokeMethodPlus(person, "setName", name);
        String whatIsYourName = (String) ReflectUtil.invokeMethodPlus(person, "whatIsYourName");

        Assert.assertEquals(Person.whatIsYourName + name, whatIsYourName);
    }

更详细代码请参见：https://github.com/wangym/java-common/

通过Java反射测试类私有成员（新）

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原文地址：http://my.oschina.net/wangyumin/blog/420374