通过反映射调用私有方法

public class ClassMethodUtil {

 /**
  * @author yuxin 执行对象内特定的私有或公用函数
  * @param clsType
  *            函数所在的类
  * @param obj
  *            函数所在的对象
  * @param methodName
  *            函数名称
  * @param parameterTypes
  *            函数参数的类型数组
  * @param args
  *            函数参数数组
  * @return 方法执行后的返回值
  */
 public static Object methoInvoke(Class clsType, Object obj, String methodName, Class[] parameterTypes, Object[] args)
   throws Exception {
  try {
   Method method = clsType.getDeclaredMethod(methodName,
     parameterTypes);
   method.setAccessible(true);
   return method.invoke(obj, args);
  } catch (IllegalArgumentException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (IllegalAccessException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (InvocationTargetException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (SecurityException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (NoSuchMethodException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  }
 }

 /**
  * @author yuxin 取得对象内特定的私有或公用字段
  * @param clsType
  *            字段所在的类
  * @param obj
  *            字段所在的对象
  * @param fieldName
  *            字段名称
  * @return 字段值
  */
 public static Object getField(Class clsType, Object obj, String fieldName)
   throws Exception {
  try {
   Field field = clsType.getDeclaredField(fieldName);
   field.setAccessible(true);
   return field.get(obj);
  } catch (SecurityException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (NoSuchFieldException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (IllegalArgumentException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (IllegalAccessException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  }

 }

 /**
  * @author yuxin 取得对象内特定的私有或公用字段
  * @param clsType
  *            字段所在的类
  * @param obj
  *            字段所在的对象
  * @param fieldName
  *            字段名称
  * @param value
  *            字段值
  */
 public static void setField(Class clsType, Object obj, String fieldName,
   Object value) throws Exception {
  try {
   Field field = clsType.getDeclaredField(fieldName);
   field.setAccessible(true);
   field.set(obj, value);
  } catch (SecurityException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (NoSuchFieldException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (IllegalArgumentException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  } catch (IllegalAccessException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new Exception(e);
  }

 }

}