java获取指定路径下文件的方法

目的：实现让用户选择一个路径 根据指定路径 读取路径下所有文件的名字 并显示

问题：没找到文件夹选择框，只有选择文件的方法

解决：用：<html:file property="myFile"  ></html:file> 让用户指定一个文件

然后  //获取指定文件 File file = new File(filename); //根据指定文件获取该文件所在的目录 filepath=file.getParentFile().toString();

最后//根据上面获取到的路径 读取路径下的所有文件 File filelist = new File(filepath); //list中就是指定文件所在目录下的所有文件的文件名 list = Arrays.asList( filelist.list());

 

 

 

 

完整工程：

<html:form action="page/admin/users/fileload_insertAction.do"> 请选择要上传的文件：<html:file property="myFile" ></html:file> <input type="submit" name="Submit" class="button" value="提 交"/> </html:form>

action

//Created by MyEclipse Struts // XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.1.0/xslt/JavaClass.xsl package zhiy.struts.admin.users.action; import java.io.File; import java.util.Arrays; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import zhiy.struts.admin.users.form.fileload; /** * MyEclipse Struts Creation date: 09-18-2006 * * XDoclet definition: * * @struts.action path="/xtgl_xf_itemdefine_insert" * name="xtgl_xf_itemdefine_insertForm" * input="/page/xtgl/xfyemian/xf_itemdefine_insert.jsp" * scope="request" validate="true" */ public class fileload_insertAction extends Action { // --------------------------------------------------------- Instance // Variables public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { fileload insert = (fileload) form; String filename = insert.getMyFile(); String filepath = ""; List list = null; if(filename !=null && !"".equals(filename)){ File file = new File(filename); filepath=file.getParentFile().toString(); File filelist = new File(filepath); list = Arrays.asList( filelist.list()); request.removeAttribute("msg"); request.setAttribute("msg",filepath); }else{ request.removeAttribute("msg"); request.setAttribute("msg","该路径下没有指定文件"); } request.removeAttribute("files"); request.setAttribute("files",list); return mapping.findForward("success"); } }

form

 package zhiy.struts.admin.users.form; import javax.servlet.http.HttpServletRequest; import org.apache.struts.action.ActionErrors; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionMessage; public class fileload extends ActionForm { @Override public void reset(ActionMapping arg0, HttpServletRequest arg1) { // TODO Auto-generated method stub } @Override public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) { // TODO Auto-generated method stub ActionErrors errors = new ActionErrors(); if(myFile!= null && "".equals(myFile.toString())){ errors.add("x",new ActionMessage("x")); request.removeAttribute("msg"); request.setAttribute("msg","请选择文件"); } return errors; } private String myFile; public String getMyFile() { return myFile; } public void setMyFile(String myFile) { this.myFile = myFile; } }