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SpringBoot–用hibernate validator手动校验

简介

说明

本文介绍如何使用validator进行手动校验。

validator可以进行自动校验,也可以进行手动校验,结果是一模一样的。自动校验见下方“自动校验”。

自动校验

自动校验的方法:项目中我们经常在请求类上加@NotNull,@NotBlank之类的注解,结合@Valid或者@Validated,即可自动对字段进行校验。自动校验的用法见:SpringBoot-@Valid与@Validated的区别 – 自学精灵

效果展示1:基础功能

代码

Controller

package com.knife.example.business.user.controller;

import com.knife.example.business.user.bo.UserAddBO;
import com.knife.example.business.user.dto.UserDTO;
import com.knife.example.business.user.vo.UserVO;
import com.knife.example.common.group.ValidGroup;
import com.knife.example.common.util.ValidateUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.BeanUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.time.LocalDateTime;
 
@Api(tags = "手动校验")
@RequestMapping("manualValidate")
@RestController
public class ManualController {
    @ApiOperation("添加")
    @PostMapping("/add")
    public UserVO add(@RequestBody UserAddBO userAddBO) {
        UserDTO userDTO = new UserDTO();
        BeanUtils.copyProperties(userAddBO, userDTO);
        // ValidUtil.validate(userDTO);
        ValidateUtil.validate(userDTO, ValidGroup.Add.class);
 
        // 将数据写到数据库
        userDTO.setId(1L);
        userDTO.setCreateTime(LocalDateTime.now());
        userDTO.setUpdateTime(LocalDateTime.now());
 
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(userDTO, userVO);
        return userVO;
    }
}

BO

package com.knife.example.business.user.bo;
 
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
 
@Data
@ApiModel("添加用户")
public class UserAddBO {
    @ApiModelProperty(value = "用户名", required = true)
    private String userName;
 
    @ApiModelProperty("昵称")
    private String nickName;
 
    @ApiModelProperty("邮箱")
    private String email;
}

DTO

package com.knife.example.business.user.dto;
 
import com.knife.example.common.group.ValidGroup;
import lombok.Data;
 
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Null;
import java.time.LocalDateTime;
 
@Data
public class UserDTO {
    /**
     * 用户id
     */
    @Null(groups = ValidGroup.Add.class, message = "用户id必须为空")
    @NotNull(groups = ValidGroup.Edit.class, message = "用户id不能为空")
    private Long id;
 
    /**
     * 用户名
     */
    @NotBlank(groups = {ValidGroup.Add.class, ValidGroup.Edit.class},
            message = "用户名不能为空")
    private String userName;
 
    /**
     * 昵称
     */
    private String nickName;
 
    /**
     * 邮箱
     */
    @NotBlank(message = "邮箱不能为空")
    private String email;
 
    /**
     * 创建时间
     */
    @Null(message = "创建时间必须为空")
    private LocalDateTime createTime;
 
    /**
     * 修改时间
     */
    @NotNull(message = "更新时间不能为空")
    private LocalDateTime updateTime;
}

测试

测试添加接口缺少字段的场景

访问:

请求体为:

{
  "email": "",
  "nickName": "",
  "userName": ""
}

效果展示2:数据嵌套

代码

Controller

package com.knife.example.business.nested.controller;

import com.knife.example.business.nested.bo.UserBO;
import com.knife.example.business.nested.group.IGroupA;
import com.knife.example.business.nested.group.IGroupAll;
import com.knife.example.business.nested.group.IGroupB;
import com.knife.example.common.util.ValidateUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@Api(tags = "手动校验嵌套")
@RestController
@RequestMapping("nested")
public class ValidatedWithGroupController {
    @ApiOperation("不使用组")
    @PostMapping("withoutGroup")
    public UserBO withoutGroup(@RequestBody UserBO userBO) {
        ValidateUtil.validate(userBO);
        return userBO;
    }

    @ApiOperation("使用组:GroupA")
    @PostMapping("groupA")
    public UserBO groupA(@RequestBody UserBO userBO) {
        ValidateUtil.validate(userBO, IGroupA.class);
        return userBO;
    }
 
    @ApiOperation("使用组:GroupB")
    @PostMapping("groupB")
    public UserBO groupB(@RequestBody UserBO userBO) {
        ValidateUtil.validate(userBO, IGroupB.class);
        return userBO;
    }
 
    @ApiOperation("使用组:GroupAll")
    @PostMapping("groupAll")
    public UserBO groupAll(@Validated({IGroupAll.class}) @RequestBody UserBO userBO) {
        ValidateUtil.validate(userBO, IGroupAll.class);
        return userBO;
    }
}

BO

package com.knife.example.business.nested.bo;

import com.knife.example.business.nested.group.IGroupA;
import com.knife.example.business.nested.group.IGroupB;
import lombok.Data;

import javax.validation.Valid;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
import java.util.List;
 
@Data
public class UserBO {
    @NotBlank(message = "名字不能为空")
    private String name;

    @NotNull(message = "年龄不能为空", groups = {IGroupA.class})
    private Integer age;

    @NotEmpty(message = "密码不能为空", groups = {IGroupB.class})
    private String password;

    @NotEmpty(message = "分数不能为空", groups = {IGroupA.class, IGroupB.class})
    private List<Integer> scoreArray;

    @Valid
    @NotNull(message = "账户不能为空")
    private AccountBO accountBO;

    @Valid
    @NotEmpty(message = "账户列表不能为空")
    private List<AccountBO> accountBOList;
}
package com.knife.example.business.nested.bo;
 
import com.knife.example.business.nested.group.IGroupA;
import com.knife.example.business.nested.group.IGroupB;
import lombok.Data;

import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;

@Data
public class AccountBO {
    @NotNull(message = "账户ID不能为空", groups = {IGroupA.class} )
    private Long id;

    @NotBlank(message = "电话号码不能为空")
    private String phoneNumber;

    private String[] emails;
}

测试

测试1:缺参数测试不分组

可以发现:校验生效了(列表形式的包装类字段也生效了)。这样不加Group时,只校验没有Group的字段。(跟自动校验的结果一样)。

请求体:

{
  "accountBO": {
    "emails": [],
    "id": 2,
    "phoneNumber": ""
  },
  "accountBOList": [
    {
      "emails": [],
      "id": null,
      "phoneNumber": ""
    }
  ],
  "age": 0,
  "name": "",
  "password": "",
  "scoreArray": []
}

测试2:缺字段测试GroupA

可以发现:GroupA的校验生效了(列表形式的包装类字段也生效了)。跟使用注解自动校验的结果一模一样,见:这里

请求体:

{
  "accountBO": {
    "emails": [],
    "id": 2,
    "phoneNumber": ""
  },
  "accountBOList": [
    {
      "emails": [],
      "id": null,
      "phoneNumber": ""
    }
  ],
  "age": 0,
  "name": "",
  "password": "",
  "scoreArray": []
}

测试3:缺字段测试GroupAll

可以发现:可以看到:走的校验逻辑是除了IGroupA和IGroupB注解的字段的逻辑。

核心代码

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