Spring动态构造函数值

Question

我英语不好。请理解..

//This is my Spring-mvc-based Controller
@Controller

public class DownloadManageController {
    private DownloadManageService downService;

    @Autowired
    public void setPackService(DownloadManageService downService) {
        this.downService = downService;
    }
}

//This is my Spring-Bean which should have a dynamic value of contructor
Component

public class DownloadManageService {
    private Log log = LogFactory.getLog(DownloadManageService.class);
    private FileAccessObject downloadFileAccessObj = null;

    DownloadManageService(String downloadInfoFile) {
        this.downloadFileAccessObj = new FileAccessObjectImpl(
                "d:/dat/download/" + downloadInfoFile);
    }

}

当服务注入控制器时...我想让downloadInfoFile变量动态依赖于一个请求参数。

Answer 1

我建议您创建一个工厂类，您可以在其中传递您想要的路径。

Answer 2

如果是我，我会这样做：

public class DownloadManageService {
    private Log log = LogFactory.getLog(DownloadManageService.class);
    private FileAccessObject downloadFileAccessObj = null;

    public DownloadManageService() {
    }

    public void setDownloadFileAccessObj... 
}

public class DownloadManageController {
    private DownloadManageService downService;

    @Autowired
    public void setPackService(DownloadManageService downService) {
        this.downService = downService;
    }

    public void exec(){
        ...
        this.downService.setDownloadFileAccessObj(new FileAccessObjectImpl(...))
        ...
    }
}