文件操作工具类

文件操作工具类

import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.util.Enumeration;import java.util.HashMap;import java.util.Map;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;/** * 文件操作工具类 * * @author shi 2020年5月12日14:10:52 */public class FileUtil { // 开始复制 public static void copy(String src, String newpath) { File file = new File(src); if (file.isFile()) { fileCopy(file.getPath(), newpath + "/" + file.getName()); } else if (file.isDirectory()) { File[] fs = file.listFiles(); // 创建文件夹 File file2 = new File(newpath); if (!file2.exists()) { file2.mkdirs(); } if (fs != null) { for (File f : fs) { if (f.isFile()) { fileCopy(f.getPath(), newpath + "/" + f.getName()); // 调用文件拷贝的方法 } else if (f.isDirectory()) { copy(f.getPath(), newpath + "/" + f.getName()); } } } } else { System.out.println("文件异常"); } } // 复制文件 public static void fileCopy(String src, String newpath) { FileOutputStream fos = null; FileInputStream fis = null; try { fos = new FileOutputStream(newpath); fis = new FileInputStream(src); byte[] buf = new byte[2048]; int len = 0; while ((len = fis.read(buf)) != -1) { fos.write(buf, 0, len); } fos.flush(); } catch (IOException e) { e.printStackTrace(); throw new RuntimeException("复制失败"); } finally { try { if (fis != null) fis.close(); fos.close(); } catch (IOException e) { throw new RuntimeException("读取失败"); } } } // 删除所有文件及文件夹 public static boolean deleteDir(File dir) { if (dir.isDirectory()) { String[] children = dir.list(); for (int i = 0; i < children.length; i++) { boolean success = deleteDir(new File(dir, children[i])); if (!success) { return false; } } } // 目录此时为空，可以删除 return dir.delete(); } // 解压文件 public static Map decompress(File uploadfile) { ZipFile zf = null; InputStream is = null; FileOutputStream fos = null; String assemblyName = uploadfile.getName().substring(0, uploadfile.getName().lastIndexOf(".")); int index; String osName = System.getProperty("os.name"); if(osName.indexOf("Windows")>=0) { index = uploadfile.getAbsolutePath().lastIndexOf("\"); }else { index = uploadfile.getAbsolutePath().lastIndexOf("/"); } Map returnMap=new HashMap(); boolean frist = true; try { zf = new ZipFile(uploadfile); Enumeration entries = zf.getEntries(); ZipEntry entry = null; while (entries.hasMoreElements()) { entry = (ZipEntry) entries.nextElement(); System.out.println("正在解压文件---->" + entry.getName()); if (entry.isDirectory()) { } else { File f =null; if(entry.getName().indexOf("images/thumbnail/")>=0) { String imgtype = entry.getName().substring(entry.getName().lastIndexOf("."),entry.getName().length()); f = new File(uploadfile.getAbsolutePath().substring(0,index+1) +assemblyName+ "/images/thumbnail/"+assemblyName+imgtype); }else if(entry.getName().indexOf("/options")>=0){ f = new File(uploadfile.getAbsolutePath().substring(0,index+1) +assemblyName+"/options/"+assemblyName+".json"); }else { f = new File(uploadfile.getAbsolutePath().substring(0,index+1) + entry.getName()); } if (!f.exists()) { File dirs = f.getParentFile(); dirs.mkdirs(); } f.createNewFile(); is = zf.getInputStream(entry); fos = new FileOutputStream(f); //临时处理 if(entry.getName().indexOf("images/thumbnail/")>=0) { returnMap.put("img", entry.getName().substring(entry.getName().lastIndexOf("/")+1, entry.getName().length())); } if(entry.getName().indexOf("/options")>=0) { returnMap.put("option", entry.getName().substring(entry.getName().lastIndexOf("/")+1, entry.getName().length())); } // 将压缩文件内容写入到这个文件中 try { int count; byte[] buf = new byte[8192]; while ((count = is.read(buf)) != -1) { fos.write(buf, 0, count); } } catch (IOException e) { e.printStackTrace(); } finally { try { if (is != null) is.close(); fos.close(); } catch (IOException e) { e.printStackTrace(); } } } } } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } finally { try { if (is != null) is.close(); fos.close(); zf.close(); } catch (IOException e) { e.printStackTrace(); } } return returnMap; } /** * 把一个文件转化为byte字节数组。 * * @return */ public static byte[] fileConvertToByteArray(File file) { byte[] data = null; try { FileInputStream fis = new FileInputStream(file); ByteArrayOutputStream baos = new ByteArrayOutputStream(); int len; byte[] buffer = new byte[1024]; while ((len = fis.read(buffer)) != -1) { baos.write(buffer, 0, len); } data = baos.toByteArray(); fis.close(); baos.close(); } catch (Exception e) { e.printStackTrace(); } return data; }}

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