校验器

女爷i 2022-06-01 02:52 236阅读 0赞

1:状态码,不用在自定义或定义枚举

HttpStatus.BAD_REQUEST.toString()

2: 校验器,逻辑处理检查放在自定义的Validator中执行,不在放在业务中处理

示例代码:

1.1定义效验bean,也可以直接用实体类

@Data public class GroupBasicAddBean extends BaseBean { /**  * 运维组编号  */  @NotBlank  private String groupCode;   /**  * 运维组名称  */  @NotBlank  private String groupName;   /**  * 所属组织id  */  @NotBlank  private String organizationId;   /**  * 所属组织名称  */  private String organizationName;   /**  * 所属分类  */  private List<Integer> category;

1.2定义效验器:

@Component public class GroupBasicAddValidator implements Validator { //这个实现方法就是在controller类中注册校验器是执行判断是否执行 @Override  public boolean supports(Class<?> classz) {

// 判断是否是要校验的类,这里是GroupBasicAddBean.

return GroupBasicAddBean.class.equals(classz);

\} @Overridepublic void validate(Object o, Errors errors) \{ GroupBasicAddBean groupBean = (GroupBasicAddBean) o;ItsmSystemOperationGroupMapper groupMapper = SpringContextUtils.*getBean*(ItsmSystemOperationGroupMapper.class);//===================================================== // 验证运维组编号唯一性. //=====================================================List<Integer> idList = null; try \{ idList = groupMapper.isGroupCodeExist(groupBean.getGroupCode());\} catch (Exception e) \{ e.printStackTrace();\} if(idList.size() > 0) \{ errors.rejectValue("groupCode", HttpStatus.*BAD\_REQUEST*.toString(), null, "该运维组编号已被使用，请重新输入！");\} //===================================================== // 验证运维组名称唯一性. //=====================================================try \{ idList = groupMapper.isGroupNameExist(groupBean.getGroupName());\} catch (Exception e) \{ e.printStackTrace();\} if(idList.size() > 0) \{ errors.rejectValue("groupName", HttpStatus.*BAD\_REQUEST*.toString(), null, "该运维组名称已被使用，请重新输入！");\} \}\}1.3 定义异常处理类

/**  * 全局异常统一处理.  *  * <br>?author chengyuebin  */ @ControllerAdvice public class GlobalExceptionHandler { @Autowired  private MessageSource messageSource;   /**  * 处理org.springframework.validation.Validator、org.hibernate.validator、javax.validation错误.  *  * <br>?param: request 请求.  * <br>?param: bindException bindException.  * <br>?return: Map.  * @throws Exception  */  @ExceptionHandler(value = BindException.class) @ResponseBody  public Map<String, Object> jsonErrorHandler(HttpServletRequest request, BindException bindException) throws Exception { Map<String, Object> map = new HashMap<String, Object>(2);  List<Map<String, String>> messageList = new ArrayList<Map<String, String>>();   List<FieldError> errors = bindException.getBindingResult().getFieldErrors();  String message=null;  for(int i = 0, size = errors.size(); i < size; i++) { // 字段名称 - 提示信息.  Map<String, String> fieldMap = new HashMap<String, String>(2);  FieldError fieldError = errors.get(i);  message =fieldError.getDefaultMessage();  } map.put("status", HttpStatus.BAD_REQUEST.value());  map.put("message", message);  return map;  } @ExceptionHandler(value = UnauthorizedException.class)//处理访问方法时权限不足问题  @ResponseBody  public Map<String, Object> defaultErrorHandler(HttpServletRequest req, Exception e) { //return ReturnJsonObject.createReturnJsonString(ResponseStatusEnum.UNAUTHORIZE, "暂无此权限访问");  Map<String, Object> map = new HashMap<String, Object>(2);  map.put("status", HttpStatus.UNAUTHORIZED.value());  map.put("message", "暂无权限");  return map;  } @ExceptionHandler(value = Exception.class) @ResponseBody  public Map<String, Object> jsonErrorHandler(HttpServletRequest request, Exception e) throws Exception { e.printStackTrace();  Map<String, Object> map = new HashMap<String, Object>(2);  map.put("status", HttpStatus.INTERNAL_SERVER_ERROR.value());  map.put("message", e.getMessage());  return map;  } }

1.4:在controller方法中注入使用

@Autowired private GroupBasicAddValidator groupValidator;

// 注册校验器.
    @InitBinder
    public void initBinder(WebDataBinder binder) {
        // 这个方法加载验证器，判断请求过来的要验证的对象，加载相对应的验证器。此方法是根据请求加载的，即n次请求就加载n次该方法。
        if (binder.getTarget() != null) {
            if (groupValidator.supports(binder.getTarget().getClass())) {
                binder.addValidators(groupValidator);
            } else if (groupBasicEditValidator.supports(binder.getTarget().getClass())) {
                binder.addValidators(groupBasicEditValidator);
            }
        }
    }

1.5:在controller方法中使用效验注解

@RequestMapping("/add") public ResponseBean add(@Valid GroupBasicAddBean groupAddBean,  @RequestParam(required = false) List<String> userIdList,  @RequestParam(required = false) String leaderId) throws Exception {

效验器已定义完成,在请求进入是会先执行校验器逻辑,如果正确执行业务逻辑,如果效验不通过,经过异常处理类抛出错误信息,也提高了系统的性能

3.复制2个对象相同的属性

ItsmSystemOperationGroupBean group = new ItsmSystemOperationGroupBean(); BeanUtils.copyProperties(groupBasicAddBean, group);

后文继续总结,这里附上Springframework的Api

http://shouce.jb51.net/spring/