code: public static void setFieldVal(Object obj, String fieldName, Object value) {
          Field field;
          if (obj == null) {
              return;
          }
          try {
              field = getField(obj.getClass(), fieldName);
              field.setAccessible(true);//取消安全机制限制
              field.set(obj, value);
          } catch (SecurityException e) {
              e.printStackTrace();
          } catch (IllegalArgumentException e) {
              e.printStackTrace();
          } catch (IllegalAccessException e) {
              e.printStackTrace();
          }
      }
docs: 为字段属性设置属性值
  <p>Function: setFieldVal</p>
  <p>Description: </p>
  
  @param obj
  @param fieldName
  @param value
  @author acexy@thankjava.com
  @date 2014-12-18 上午9:52:18
  @version 1.0