利用java反射重写toString

因项目测试须要，打印出对象的键值对，直接上代码

 1 public String toString() {

 2         Field[] fields = getClass().getFields();

 3         StringBuffer sb = new StringBuffer();

 4         sb.append(getClass().getName() + ":[\n");

 5         for (Field field : fields) {

 6             sb.append("    ");

 7             sb.append(field.getName() + " = ");

 8             try {

 9                 sb.append(field.get(this));

10             } catch (IllegalArgumentException e) {

11                 e.printStackTrace();

12             } catch (IllegalAccessException e) {

13                 e.printStackTrace();

14             }

15             sb.append("\n");

16         }

17         sb.append("]");

18         return sb.toString();

19     }

效果图: