封装统一返回结果

前言

目前，前后端分离的项目越来越多。如果项目采用前后端分离的方式去开发的话，后端只提供API接口，前端通过Ajax去调用接口。那么前后端需要提前定义好数据格式，为了减少沟通成本，需要封装一个统一返回结果的。

响应类

@Getter
//@ApiModel(value = "全局统一返回结果")
public class Result {
    //    @ApiModelProperty(value = "是否成功")
    private Boolean success;

    //    @ApiModelProperty(value = "返回码")
    private Integer code;

    //    @ApiModelProperty(value = "返回消息")
    private String message;

    //    @ApiModelProperty(value = "返回数据")
    private Object data;

    private Result() {

    }

    private Result(ResultCode resultCode) {
        this.success = resultCode.getSuccess();
        this.code = resultCode.getCode();
        this.message = resultCode.getMessage();
    }

    public static Result ok() {
        return new Result(ResultCode.SUCCESS);
    }

    public static Result error() {
        return new Result(ResultCode.UNKNOWN_ERROR);
    }

    public static Result error(ResultCode resultCode) {
        return new Result(resultCode);
    }

    public Result code(Integer code) {
        this.code = code;
        return this;
    }

    public Result message(String message) {
        this.message = message;
        return this;
    }

    public Result data(Object obj) {
        this.data = obj;
        return this;
    }
}

响应码

@Getter
public enum ResultCode {
    SUCCESS(true, 2000, "成功"),
    UNKNOWN_ERROR(false, 4000, "未知错误"),

	BAD_CREDENTIALS(false, 3001, "用户名或密码输入错误！请重新输入！"),
    CREDENTIALS_EXPIRED(false, 3002, "密码过期，请联系管理员！"),
    ACCOUNT_EXPIRED(false, 3003, "账户过期，请联系管理员！"),
    ACCOUNT_LOCKED(false, 3004, "账户被锁定，请联系管理员！"),
    ACCOUNT_DISABLED(false, 3005, "账户被禁用，请联系管理员！"),
    EXCEED_MAX_SESSION(false, 3006, "您的账号已在别的地方登录，不允许重复登录！"),
    
	SMS_SEND_ERROR(false, 5000, "短信发送失败");

    private Boolean success;
    private Integer code;
    private String message;

    ResultCode(Boolean success, Integer code, String message) {
        this.success = success;
        this.code = code;
        this.message = message;
    }
}

依赖包

		<dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>

使用

@GetMapping("code/sms")
    public Result smsCode(HttpServletRequest request, @RequestParam String mobile) {
        // 1.生成手机验证码
        String code = RandomStringUtils.randomNumeric(4);
        // 2.存放到session中
        request.getSession().setAttribute(Constant.SMS_CODE, code);
        // 3.发送手机验证码
        smsService.sendSms(mobile, code);
        // Result.ok() 默认成功，message = "成功"
        // Result.ok().data(这个可以传入对象) 默认成功，message = "成功"，带响应数据
        // Result.error() 默认失败，message = "未知错误"
        // Result.error().message("短信发送失败") 自定义提示信息
        // Result.error(ResultCode.SMS_SEND_ERROR) 可传入自定义枚举类
        return Result.ok().message("短信发送成功");
    }