java对文件操作例子

package org.sonny.filemanager.util;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.jspsmart.upload.*;
import cn.bizos.filemanager.util.FileProxy;
import cn.bizos.filemanager.util.XMLBuilder;

public class FileManager {
 
 SmartUpload su = null;
 Request rq = null;
 File f = null;
 FileProxy fproxy = null;
 //XMLBuilder xb = null;
 
 public FileManager() {
  su = new SmartUpload();
  fproxy = new FileProxy();
 }
 public FileManager(ServletConfig config, HttpServletRequest request
   , HttpServletResponse response) {
  su = new SmartUpload();
  fproxy = new FileProxy();
  initialize(config, request, response);
 }
 public String createFileSpace(String userName){
  createFileInstance(userName);
  f.mkdir();
  return XMLBuilder.buildNormalDoc();
 }
 public String createNewFolder(String folderName, String path){
  createFileInstance(path + fproxy.getSeparate(path) + folderName);
     f.mkdir();
     return XMLBuilder.buildNormalDoc();
 }
 public String delete(String path){
  File f = new File(fproxy.getValidPatch(path, false));
  String[] list = f.list();
  if(list != null) {
   for(String l : list){
    delete(path + fproxy.getSeparate(path) + l);   
   }
  }
  f.delete();
  return XMLBuilder.buildNormalDoc();
 }
 public String deleteFileSpace(String userName){
  createFileInstance(userName);
  f.delete();
  return XMLBuilder.buildNormalDoc();
 }
 public String rename(String newpath, String oldpath){
  try{
   createFileInstance(oldpath);
   File rf = new File(fproxy.getValidPatch(newpath, false));
   f.renameTo(rf);
  }catch(Exception e) {
   e.printStackTrace();
  }
  return XMLBuilder.buildNormalDoc();
 }
 public String copy(String from, String to, int circulatory) {
  try{
   File frompath = new File(fproxy.getValidPatch(from, false));
   if(frompath.isDirectory()) {
    File temp = new File(fproxy.getValidPatch(to, false));
    if(!temp.exists()) temp.mkdirs();
    if(circulatory == 0) {
     to = to + from.substring(from.lastIndexOf("/"));
     fproxy.getValidPatch(to, true);
    }
    String[] sublist = frompath.list();
    for(int n = 0; n < sublist.length; n++) {
     copy(from + "/" + sublist[n], to + "/" + sublist[n], ++circulatory);
    }
   }else{
    saveFileToDisk(frompath, to, circulatory);
   }
  }catch(Exception e) {
   e.printStackTrace();
  }
  return XMLBuilder.buildNormalDoc();
 }
 private void saveFileToDisk(File file, String saveTo, int circulatory) {
  try{
   saveTo = fproxy.getValidPatch(saveTo, false);
   if(circulatory == 0) saveTo = saveTo + "/" + file.getName();
   FileInputStream input =  new FileInputStream(file);
   FileOutputStream output = new FileOutputStream(saveTo); 
         byte[] b  =  new  byte[1024  *  5]; 
         int len; 
         while((len = input.read(b)) != -1)  { 
            output.write(b,  0,  len); 
         } 
         output.flush(); 
         output.close(); 
         input.close(); 
  }catch(Exception e) {
   e.printStackTrace();
  }
 }
 private void log(String mgs) {
  System.out.println(mgs);
 }
 public String getCatalog(String path){
  if(path != null) {
   if(!"undefined".equals(path) && !"$userId;".equals(path)) {
    if(!fproxy.isExist(path)) {
     fproxy.getValidPatch(path, true);
    }
   }
  }
  XMLBuilder xb = new XMLBuilder();
  return xb.getFileSpaceXML(path);
 }
 public String getShareCatalog(String userName){
  return null;
 }
 public String move(String from, String to) {
  System.out.println("run move ......");
  createFileInstance(from);
  File dir = new File(fproxy.getValidPatch(to, false));
     f.renameTo(new File(dir, f.getName()));
     return XMLBuilder.buildNormalDoc();
 }
 public void initialize(ServletConfig config, HttpServletRequest request
   , HttpServletResponse response){
  try {
   su.initialize(config, request, response);
  } catch (ServletException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
 }
 public String getSavedPath(String value) {
  String rpath = value;
  //rq = su.getRequest();
  //if(rq != null) rpath = rq.getParameter("serverpath");
  String fileName = getFileName();
  rpath += fproxy.getSeparate(value) + fileName;
  return rpath;
 }
 public String getFileName() {
  return getFileName(0);
 }
 public String getFileName(int index) {
  String fileName = "";
  com.jspsmart.upload.Files files = su.getFiles();
  if(files != null) {
   com.jspsmart.upload.File file = files.getFile(index);
   if(file != null) fileName = file.getFileName();
  }
  return fileName;
 }
 public String getSaveToPath() {
  String rpath = "";
  rq = su.getRequest();
  String name = rq.getParameter("name");
  //System.out.println(name);
  if(rq != null) rpath = rq.getParameter("serverpath");
  return rpath;
 }
 public InputStream getInputStream(int index) {
  InputStream rInputStream = null;
  com.jspsmart.upload.Files files = su.getFiles();
  if(files != null) {
   com.jspsmart.upload.File file = files.getFile(index);
   if(file != null) {
    rInputStream = file.getInputStream();
   }
  }
  return rInputStream;
 }
 public int upload(String saveTo) {
  try {
   su.upload();
   //String filePath = getSaveToPath();
   String savetopath = fproxy.getValidPatch(saveTo, true);
   return su.save(savetopath, su.SAVE_PHYSICAL);
  } catch (SmartUploadException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (ServletException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return 0;
 }
 public void downLoad(String filePath) {
  try {
   su.setContentDisposition(null);
   String path = fproxy.getValidPatch(filePath, false);
   su.downloadFile(path);
  } catch (SmartUploadException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (ServletException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
    public void setShareFolder(String selectedPath, String shareUser){
  
 }
    public void cancelShareFolder(String selectedPath, String shareUser){
  
 }
    private void createFileInstance(String path){
     String rpath = fproxy.getValidPatch(path, false);
     f = new File(rpath);
 }
}