使用servlet创建文件夹和上传文件
我有两个使用tomcat的 web项目..这是我的目录结构..
webapps --project1 --WEB-INF --project2 --WEB-INF
我使用commons-fileupload ..这是我在project1中的servlet中的代码
String fileName = item.getName(); String root = getServletContext().getRealPath("/"); File path = new File(root + "/uploads"); if (!path.exists()) { path.mkdirs(); } File uploadedFile = new File(path + File.separator + fileName); item.write(uploadedFile);
这将在’project1’中创建’uploads’文件夹,但我想在’webapps’中创建’uploads’文件夹,因为当我取消部署’project1’时,我不希望’uploads’文件夹消失。
我已经尝试过String root = System.getProperty("catalina.base");
但不工作..
任何人都可以帮助我……提前谢谢
首先,在tomcat安装文件夹之外的服务器中创建一个文件夹,例如/opt/myuser/files/upload
。 然后,在属性文件或web.xml中将此路径配置为Servlet init配置,以使其可用于您拥有的任何Web应用程序。
如果使用属性文件:
file.upload.path = /opt/myuser/files/upload
如果是web.xml:
MyServlet your.package.MyServlet FILE_UPLOAD_PATH /opt/myuser/files/upload
或者,如果您使用的是Servlet 3.0规范,则可以使用@WebInitParam
注释配置init参数:
@WebServlet(name="MyServlet", urlPatterns = {"/MyServlet"}, initParams = { @WebInitParam(name = "FILE_UPLOAD_PATH", value = "/opt/myuser/files/upload") }) public class MyServlet extends HttpServlet { private String fileUploadPath; public void init(ServletConfig config) { fileUploadPath = config.getInitParameter("FILE_UPLOAD_PATH"); } //use fileUploadPath accordingly public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException) { String fileName = ...; //retrieve it as you're doing it now //using File(String parent, String name) constructor //leave the JDK resolve the paths for you File uploadedFile = new File(fileUploadPath, fileName); //complete your work here... } }