• 获取字节码的三种方法

        Class calzz = Class.forName("com.chen.domain.Person");
        
        Class calzz2 = Person.class;
        
        Class calzz3 = new Person().getClass();
        

@Test
    public void test2() throws Exception {
        
        Class calzz = Class.forName("com.chen.domain.Person");
        
        //获得javabean中的name字段
        Field declaredField = calzz.getDeclaredField("name");
        
        
        Person p = new Person();
        
        
        //打开访问权限(private)
        declaredField.setAccessible(true);
        
        //相当于p.setName();
        declaredField.set(p, "小异");
        
        //System.out.println(p.getName());
        
    }