public String  updateMem(Member member){
  

  try {
  

  //根据id获取实体
  

  Member persistent = memberdao.get(member.getId());
  

  

  //email不为空
  

  if(StringUtils.isNotEmpty(member.getEmail())){
  

  if(this.isEmail(persistent.getEmail())){
  

  persistent.setEmail(member.getEmail());
  

  }else{
  

  code="403";
  

  }
  

  }
  

  

  //电话不为空
  

  if(StringUtils.isNotEmpty(member.getMobile())){
  

  if(this.isMobile(persistent.getMobile())){
  

  persistent.setMobile(member.getMobile());
  

  }else{
  

  code="402";
  

  }
  

  }
  

  

  //密码不为空时
  

  if (StringUtils.isNotEmpty(member.getPassword())) {
  

  String oldPassword = DigestUtils.md5Hex(member.getOldPassword());
  

  if(oldPassword.equals(persistent.getPassword())){
  

  String passwordMd5 = DigestUtils.md5Hex(member.getPassword());
  

  persistent.setPassword(passwordMd5);
  

  }else{
  

  code = "408";
  

  }
  

  }
  

  

  **//BeanUtils.copyProperties(member, persistent, new String[] {"id", "username", "isAccountEnabled", "isAccountLocked", "loginFailureCount", "lockedDate", "registerIp", "loginIp", "loginDate", "passwordRecoverKey"});**
  

  memberdao.update(persistent);
  

  memberdao.flush();
  

  code="200";
  

  } catch (Exception e) {
  

  code="300";
  

  e.printStackTrace();
  

  }
  

  return code;
  

  }
  

  

  我加这一句的时候就报空指针导常：
  

  **//BeanUtils.copyProperties(member, persistent, new String[] {"id", "username", "isAccountEnabled", "isAccountLocked", "loginFailureCount", "lockedDate", "registerIp", "loginIp", "loginDate", "passwordRecoverKey"});**
  

  

  测试操作test()方法
  

  //更新开始
  

  System.out.println("请输入原始密码：");
  

  String oldPassword = scan.next();
  

  System.out.println("请输入新密码:");
  

  String newPassword = scan.next();
  

  //      System.out.println("请输入邮箱：");
  

  //      String email = scan.next();
  

  //      member.setEmail(email);
  

  member.setOldPassword(oldPassword);
  

  member.setId("4028eee4399010c601399010e1f60000");
  

  member.setPassword(newPassword);
  

  System.out.println(memberService.updateMem(member));