SpringBoot实体类校验与全局异常处理

1.引入maven坐标

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>

2.实体类校验规则

@Data
@EqualsAndHashCode(callSuper = true)
public class SysMenu extends BaseEntity {

    private static final long serialVersionUID = 1L;

    /**
     * 父菜单ID，一级菜单为0
     */
    @NotNull(message="上级菜单不能为空")
    private Long parentId;

    @NotBlank(message = "菜单名称不能为空")
    private String name;

    /**
     * 菜单URL
     */

    private String path;

    /**
     * 授权(多个用逗号分隔，如：user:list,user:create)
     */
    @NotBlank(message = "菜单权限编码不能为空")
    private String perms;

    private String component;

    /**
     * 类型     0：目录   1：菜单   2：按钮
     */
    @NotNull(message = "菜单类型不能为空")
    private Integer type;

    /**
     * 菜单图标
     */
    private String icon;

    /**
     * 排序
     */
    @TableField("orderNum")
    private Integer orderNum;

    private LocalDateTime updated;

    @TableField(exist = false)
    private List<SysMenu> children = new ArrayList<>();//子菜单
}

3.@validated注解校验实体类

当实体类出现异常时,交给全局异常处理器处理异常

public Result save(@Validated @RequestBody SysMenu sysMenu) {

        return Result.success();
    }

4.全局异常处理器

  @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    public Result handler(MethodArgumentNotValidException e){
        BindingResult bindingResult = e.getBindingResult();
        ObjectError objectError = bindingResult.getAllErrors().stream().findFirst().get();
        log.error("实体类校验异常：-------------{}",objectError.getDefaultMessage());
        return Result.fail(objectError.getDefaultMessage());
    }