SpringMVC框架和SpringBoot项目中控制器的响应结果深入分析

package cn.tedu.csmall.product.web;
import lombok.Data;
@Data
public class JsonResult {
    private Integer state;
    private String message;
    public static JsonResult ok() {
        JsonResult jsonResult = new JsonResult();
        jsonResult.state = ServiceCode.OK;
        return jsonResult;
    }
}

@ApiOperation("添加相册")
@PostMapping("/add-new")
public JsonResult addNew(AlbumAddNewDTO albumAddNewDTO) {
    albumService.addNew(albumAddNewDTO);
    return JsonResult.ok();
}

if (response.data.state == 1) {
    // 成功
} else if (response.data.state == 2) {
    // 失败：名称被占用
    alert(response.data.message);
}

    login(){
        axios.post("/login",v.user).then(function (response) {
            if (response.data==1){
                location.href="/admin.html" rel="external nofollow" ; //跳转到后台管理页面
            }else if(response.data==2){
                v.\$message.error("用户名不存在!");
            }else{
                v.\$message.error("密码错误!");
            }
        })
    }

public static JsonResult fail(Integer state, String message) { 
    // ... 
}

JsonResult.fail(99999, e.getMessage());

package cn.tedu.csmall.product.web;
public enum ServiceCode {
    OK(200),
    ERR_NOT_FOUND(404),
    ERR_CONFLICT(409);
    private Integer value;
    ServiceCode(Integer value) {
        this.value = value;
    }
    public Integer getValue() {
        return value;
    }
}

public static JsonResult fail(ServiceCode serviceCode, String message) { 
    // ... 
}

JsonResult.fail(ServiceCode.ERR_CONFLICT, e.getMessage());