Exception

• 自定义异常

  /**
   * 自定义异常类
   */
  public class TestException extends Exception {
  
  
      private String message;
      public TestException(String message) {
          this.message = message;
      }
  
      @Override
      public String getMessage() {
          return this.message;
      }
  }
  
  

  /**
   * 验证用户信息
   */
  @Override
  public boolean verify() throws TestException {
  
      String err_msg = "";
  
      //验证用户名、密码、手机、邮箱是否为空或者空字符串
      if (getUsername() == null || getUsername().equals(""))
          err_msg = "用户名不能为空";
      else if (getPassword() == null || getPassword().equals(""))
          err_msg = "密码不能为空";
      else if (getPhone() == null || getPhone().equals(""))
          err_msg = "手机不能为空";
      else if (getEmail() == null || getEmail().equals(""))
          err_msg = "邮箱不能为空";
  
      //判断异常字符是否为空
      if (!err_msg.equals("")) {
          isOk = false;
          throw new TestException(err_msg);
      }
  
      return isOk;
  }
  
  

  //获取输出流对象
  PrintWriter out = resp.getWriter();
  boolean isOk = false;
  try {
      isOk = uc.getResult();
  
      if (isOk) {
          UserContextService usc = new UserContextService(1);
          usc.getResult(ub);
          if (usc.isOk() == true) {
              out.println("注册成功");
          }
      } else {
          out.println("注册失败");
      }
  } catch (TestException e) {
      out.println(e.getMessage());
  }