实用boot validation

1:增加依赖

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

2:相应实体类上增加验证注解

/**
 * @author zs
 * @date 2019/7/28
 */
public class User {
    private long id;
    @NotEmpty(message = "用户名不能为空")
    private String name;
    private String cardNumber;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getCardNumber() {
        return cardNumber;
    }

    public void setCardNumber(String cardNumber) {
        this.cardNumber = cardNumber;
    }

    @Override
    public String
    toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", cardNumber='" + cardNumber + '\'' +
                '}';
    }
}


3：控制层的验证

@PostMapping("/user/save")
public User save(@Valid @RequestBody User user) throws Exception {
    System.out.println(user.getName());
    return user;

}

4：对于错误的捕捉

@ControllerAdvice
public class ExecptionHandler {

    public static final Logger logger = LoggerFactory.getLogger(ExecptionHandler.class);

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Result handler(Exception e){
        if (e instanceof AppException ){
            AppException exception = (AppException) e;
            return new Result(((AppException) e).getCode(), ((AppException) e).getMsg());
        }else if (e.getClass().equals(MethodArgumentNotValidException.class)){
            MethodArgumentNotValidException e1 = (MethodArgumentNotValidException) e;
            BindingResult bindingResult =e1.getBindingResult();
            String errorMesssage = "校验失败:";

            for (FieldError fieldError : bindingResult.getFieldErrors()) {
                errorMesssage += fieldError.getDefaultMessage() + ", ";
            }

            return new Result(400, errorMesssage);
        }else{
            e.printStackTrace();
            System.out.println("==========================");
            logger.error("[系统异常]{}", ExceptionUtils.unwrapInvocationTargetException(e));
            return Result.BuildError(ValiException.SERVER_ERROR);
        }

    }

至此，可以返回自定义的Result
附上Result的domain

package com.gupao.demovalidation.apiException;

/**
 * @author zs
 * @date 2019/7/28
 */
public class Result {
    private int code;
    private Object data;
    private String msg;

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Result(int code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    public static Result BuildError(IApiError iApiError){
        return new Result(iApiError.getCode(),iApiError.getMsg());
    }
}