ajax访问后台404，请大佬看一下URL怎么写

Question

ajax访问ssm写的后台，页面报错404，经过debug发现后台未执行，大概率是URL问题，但修改多次URL都是404，请大佬看一下URL怎么写。

js

function fileDownload(fileName) {
    var dataRow = {
        dateTime: new Date(),
        userGroup: 'admingroup',
        user: 'admin',
        eventType: "文件上传下载",
        operation: "下载",
        controlDesc: "下载" + fileName
    };
    $.ajax({
        url: "/File2ossDemo/operating/addLog.do",
        type: "POST",
        data: JSON.stringify(dataRow),
        dataType: "json",
        contentType: "application/json;charset=UTF-8",
        success: function (result) {
            console.log(result);
        },
        error: function () {
            console.log("error");
        }
    })
}

controller

@Controller
@RequestMapping("/operating")
public class OperatingController {
    @Autowired
    private OperatingService operatingService;

    @RequestMapping(value = "/addLog.do",method = RequestMethod.POST)
    @ResponseBody
    public String addOperatingRecords(@RequestBody OperatingRecords operatingRecords) {
        if (operatingService.addOperatingRecords(operatingRecords)) {
            return JSON.toJSONString("success");
        }
        return JSON.toJSONString("fail");
    }

}

项目结构

Answer 1

你按F12打开控制台看一看实际请求出去的链接长啥样