validation注解

罕用注解

@Null  被正文的元素必须为null@NotNull  被正文的元素不能为null，但能够为empty,没有Size的束缚@AssertTrue  被正文的元素必须为true@AssertFalse  被正文的元素必须为false@Min(value)  被正文的元素必须是一个数字，其值必须大于等于指定的最小值@Max(value)  被正文的元素必须是一个数字，其值必须小于等于指定的最大值@DecimalMin(value)  被正文的元素必须是一个数字，其值必须大于等于指定的最小值@DecimalMax(value)  被正文的元素必须是一个数字，其值必须小于等于指定的最大值@Size(max,min)  被正文的元素的大小必须在指定的范畴内。@Digits(integer,fraction)  被正文的元素必须是一个数字，其值必须在可承受的范畴内@Past  被正文的元素必须是一个过来的日期@Future  被正文的元素必须是一个未来的日期@Pattern(value) 被正文的元素必须合乎指定的正则表达式。@Email 被正文的元素必须是电子邮件地址@Length 被正文的字符串的大小必须在指定的范畴内@NotEmpty  被正文的字符串必须非空，不能为null，且Size>0@Range  被正文的元素必须在适合的范畴内@NotBlank  只用于String,不能为null且trim()之后size>0

应用@Validated验证。

应用@RequestBody验证body数据。

举例

  • UsersController
package com.chenglulu.controller.users;import org.springframework.http.MediaType;import org.springframework.validation.annotation.Validated;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletRequest;@RestController@RequestMapping( value = "/", produces = {MediaType.APPLICATION_JSON_VALUE})public class UsersController {        @RequestMapping(value = "/register", method = RequestMethod.POST)    public void registerUser(HttpServletRequest request, @Validated @RequestBody RegisterUsersParams params){           }}
  • RegisterUsersParams
package com.chenglulu.controller.users.domain;import com.chenglulu.constant.Validation;import lombok.Data;import javax.validation.constraints.NotBlank;import javax.validation.constraints.NotNull;import javax.validation.constraints.Pattern;@Datapublic class RegisterUsersParams {    @NotBlank(message = "username is blank")    private String username;        @NotBlank(message = "phone is blank")    @Pattern(regexp = Validation.PHONE)    private String phone;        @Email    private String email;}

全局异样解决

罕用注解

@ControllerAdvice@ExceptionHandler  异样类型@ResponseStatus  异样响应状态@ResponseBody

举例

package com.chenglulu.exception;import com.chenglulu.constant.Constants;import com.chenglulu.constant.ErrorCode;import com.chenglulu.controller.users.domain.BaseResponse;import com.chenglulu.utils.ResponseUtil;import org.apache.commons.lang3.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.MessageSource;import org.springframework.core.MethodParameter;import org.springframework.http.HttpEntity;import org.springframework.http.HttpStatus;import org.springframework.http.ResponseEntity;import org.springframework.validation.BindingResult;import org.springframework.validation.FieldError;import org.springframework.web.bind.MethodArgumentNotValidException;import org.springframework.web.bind.annotation.ControllerAdvice;import org.springframework.web.bind.annotation.ExceptionHandler;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.ResponseStatus;import org.springframework.web.servlet.support.RequestContextUtils;import javax.servlet.http.HttpServletRequest;import java.util.List;import java.util.Locale;@ControllerAdvicepublic class GlobalExceptionHandler {    @Autowired private MessageSource messageSource;        /**    * 未知异样解决     * @param request 申请    * @param ex 异样对象    */     @ExceptionHandler(value = {MethodArgumentNotValidException.class})    @ResponseStatus(value = HttpStatus.BAD_REQUEST)    @ResponseBody public HttpEntity<BaseResponse> handlerMethodArgumentNotValidException(HttpServletRequest request, MethodArgumentNotValidException ex){        String requestId = getRequestIdHeader(request);                String code = ErrorCode.PARAMETER_ERROR;        Locale locale = RequestContextUtils.getLocale(request);        BindingResult br = ex.getBindingResult();        StringBuilder msgStr = new StringBuilder();        List<FieldError> feList = br.getFieldErrors();        for (FieldError fe : feList) {            String message = fe.getDefaultMessage();            String field = fe.getField();            msgStr.append(field).append(message).append("; ");        }        Object[] msgArg = new Object[]{msgStr};        String message = messageSource.getMessage(code, msgArg, locale);        BaseResponse res = ResponseUtil.error(requestId, code, message);        return new HttpEntity<BaseResponse>(res);    }        /**    * 未知异样解决     * @param request 申请    * @param ex 异样对象    */     @ExceptionHandler(value = {Exception.class})    @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)    @ResponseBody public HttpEntity<BaseResponse> handlerException(HttpServletRequest request, Exception ex){        String requestId = getRequestIdHeader(request);                String code = ErrorCode.UNKNOWN_ERROR;        BaseResponse res = ResponseUtil.error(request, requestId, code, null);        return new HttpEntity<BaseResponse>(res);    }        private String getRequestIdHeader(HttpServletRequest request) {        return request.getHeader(Constants.HEADER_X_REQUEST_ID);    }        private String getLocaleMessage(HttpServletRequest request) {    }}