使用hibernate验证字段信息是否输入正确

1. 导入pom.xml。一般springboot项目都会导入

因为hibernate在spring-boot-starter-web中（如图），故导入以下坐标即可

    org.springframework.boot
    spring-boot-starter-web

2. 在需要验证的实体类的字段上加上相应注释验证

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import org.hibernate.validator.constraints.Length;

import javax.validation.constraints.*;
import java.util.Date;

@ApiModel(value="用户对象", description="从客户端，由用户传入的数据封装在此entity中")
public class CenterUserBO {

    @ApiModelProperty(value="用户名", name="username", example="json", required = false)
    private String username;
    @ApiModelProperty(value="密码", name="password", example="123456", required = false)
    private String password;
    @ApiModelProperty(value="确认密码", name="/confirm/iPassword", example="123456", required = false)
    private String /confirm/iPassword;


    @NotBlank(message = "用户昵称不能为空")
    @Length(max = 12, message = "用户昵称不能超过12位")
    @ApiModelProperty(value="用户昵称", name="nickname", example="杰森", required = false)
    private String nickname;

    @Length(max = 12, message = "用户真实姓名不能超过12位")
    @ApiModelProperty(value="真实姓名", name="realname", example="杰森", required = false)
    private String realname;

    @Pattern(regexp = "^(((13[0-9]{1})|(15[0-9]{1})|(18[0-9]{1}))+\d{8})$", message = "手机号格式不正确")
    @ApiModelProperty(value="手机号", name="mobile", example="13999999999", required = false)
    private String mobile;

    @Email
    @ApiModelProperty(value="邮箱地址", name="email", example="imooc@imooc.com", required = false)
    private String email;

    @Min(value = 0, message = "性别选择不正确")
    @Max(value = 2, message = "性别选择不正确")
    @ApiModelProperty(value="性别", name="sex", example="0:女 1:男 2:保密", required = false)
    private Integer sex;
    @ApiModelProperty(value="生日", name="birthday", example="1900-01-01", required = false)
    private Date birthday;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String get/confirm/iPassword() {
        return /confirm/iPassword;
    }

    public void set/confirm/iPassword(String /confirm/iPassword) {
        this.confirmPassword = /confirm/iPassword;
    }

    public String getNickname() {
        return nickname;
    }

    public void setNickname(String nickname) {
        this.nickname = nickname;
    }

    public String getRealname() {
        return realname;
    }

    public void setRealname(String realname) {
        this.realname = realname;
    }

    public String getMobile() {
        return mobile;
    }

    public void setMobile(String mobile) {
        this.mobile = mobile;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public Integer getSex() {
        return sex;
    }

    public void setSex(Integer sex) {
        this.sex = sex;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    @Override
    public String toString() {
        return "CenterUserBO{" +
                "username='" + username + ''' +
                ", password='" + password + ''' +
                ", confirmPassword='" + confirmPassword + ''' +
                ", nickname='" + nickname + ''' +
                ", realname='" + realname + ''' +
                ", mobile='" + mobile + ''' +
                ", email='" + email + ''' +
                ", sex=" + sex +
                ", birthday=" + birthday +
                '}';
    }
}

3. 使用@Valid开启验证

@Api(value = "用户信息接口", tags = {"用户信息接口相关接口"})
@RestController
@RequestMapping("userInfo")
public class CenterUserController {

    @Autowired
    private CenterUserService centerUserService;

    @ApiOperation(value = "修改用户信息", notes = "修改用户信息")
    @PostMapping("/update")
    public JSonResult userInfo(
            @ApiParam(name = "userId", value = "用户id", required = true)
            @RequestParam String userId,
            @RequestBody @Valid CenterUserBO centerUserBO,
            BindingResult result,
            HttpServletRequest request,
            HttpServletResponse response){

        //判断BindingResult是否保存错误的验证信息，如果有，直接return
        if (result.hasErrors()){
            Map errorMap = getErrors(result);
            return JSONResult.errorMap(errorMap);
        }

        Users userResult = centerUserService.updateUserInfo(userId, centerUserBO);
        userResult = setNullProperty(userResult);
        cookieUtils.setcookie(request, response, "user", JsonUtils.objectToJson(userResult),true);

        //TODO 后续要改，增加令牌token，会整合进redis，分布式会话
        return JSONResult.ok();
    }

    private Map getErrors(BindingResult result){
        Map map = new HashMap<>();
        List errorList = result.getFieldErrors();
        for (FieldError error : errorList) {
            //发生验证错误所对应的某一个属性
            String errorField = error.getField();
            //验证错误的信息
            String errorMsg = error.getDefaultMessage();

            map.put(errorField, errorMsg);
        }
        return map;
    }
}

4. 结果