工具类
package com.byd.core; import java.awt.Image; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.Collection; import java.util.List; import java.util.Random; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.lang.StringUtils; import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGEncodeParam; import com.sun.image.codec.jpeg.JPEGImageEncoder; public class MyUtils { public static void main(String[] s) { List conditions = new ArrayList(); MyUtils.addToCollection(conditions, MyUtils.split("a,b-c d,e f-g", " ,-")); System.out.println(conditions);// output[a, b, c, d, e, f, g] } /** * * * @param filePathAndName * String �ļ�·������� ��c:/fqf.txt * @param fileContent * String * @return boolean */ public static boolean delFile(String filePathAndName) { File myDelFile = new java.io.File(filePathAndName); if (!myDelFile.exists()) { return true; } return myDelFile.delete(); } public static boolean delAllFile(String filepath) { File file = new java.io.File(filepath); if (!file.exists()) { return true; } if (!file.isDirectory()) { return true; } String[] tempList = file.list(); File temp = null; for (int i = 0; i < tempList.length; i++) { if (filepath.endsWith(File.separator)) { temp = new File(filepath + tempList[i]); } else { temp = new File(filepath + File.separator + tempList[i]); } if (temp.isFile() && temp.canWrite()) temp.delete(); } return true; } /** * �ϴ��ļ� * * @param uploadFileName * ���ϴ����ļ���� * @param savePath * �ļ��ı���·�� * @param uploadFile * ���ϴ����ļ� * @return newFileName */ public static String upload(String uploadFileName, String savePath, File uploadFile) { String newFileName = getRandomName(uploadFileName, savePath); try { FileOutputStream fos = new FileOutputStream(savePath + newFileName); FileInputStream fis = new FileInputStream(uploadFile); byte[] buffer = new byte[1024]; int len = 0; while ((len = fis.read(buffer)) > 0) { fos.write(buffer, 0, len); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return newFileName; } /** * ���·������һϵ�е�Ŀ¼ * * @param path */ public static void mkDirectory(String path) { File file; try { file = new File(path); if (!file.exists()) { file.mkdirs(); } } catch (RuntimeException e) { e.printStackTrace(); } finally { file = null; } } /** * �����������ÿһ��Ԫ�طֱ���ӵ�ָ��������,����Apache commons collections �еķ��� * * @param collection * �϶��� * @param arr * �������� */ public static void addToCollection(Collection collection, Object[] arr) { if (null != collection && null != arr) { CollectionUtils.addAll(collection, arr); } } /** * ��� * * <pre> * Example: * String[] arr = StringUtils.split("a b,c d,e-f", " ,-"); * System.out.println(arr.length);//���6 * </pre> * * @param str ַ� * @param separatorChars * �ָ���ַ� * @return �ַ����� */ public static String[] split(String str, String separatorChars) { return StringUtils.split(str, separatorChars); } /** * ����ָ���ֶε�setter���� * * <pre> * Example: * User user = new User(); * MyUtils.invokeSetMethod("userName", user, new Object[] {"����"}); * </pre> * * @param fieldName * �ֶ�(����)��� * @param invokeObj * �����÷����Ķ��� * @param args * �����÷����IJ������� * @return �ɹ���� */ public static boolean invokeSetMethod(String fieldName, Object invokeObj, Object[] args) { boolean flag = false; Field[] fields = invokeObj.getClass().getDeclaredFields(); // ��ö���ʵ���������ж�����ֶ� Method[] methods = invokeObj.getClass().getDeclaredMethods(); // ��ö���ʵ���������ж���ķ��� for (Field f : fields) { String fname = f.getName(); if (fname.equals(fieldName)) {// ֶ��� String mname = "set" + (fname.substring(0, 1).toUpperCase() + fname .substring(1));// for (Method m : methods) { String name = m.getName(); if (mname.equals(name)) { // ����Integer���� if (f.getType().getSimpleName().equalsIgnoreCase( "integer") && args.length > 0) { args[0] = Integer.valueOf(args[0].toString()); } // ����Boolean���� if (f.getType().getSimpleName().equalsIgnoreCase( "boolean") && args.length > 0) { args[0] = Boolean.valueOf(args[0].toString()); } try { m.invoke(invokeObj, args); flag = true; } catch (IllegalArgumentException e) { flag = false; e.printStackTrace(); } catch (IllegalAccessException e) { flag = false; e.printStackTrace(); } catch (InvocationTargetException e) { flag = false; e.printStackTrace(); } } } } } return flag; } /** * �ж��ļ��Ƿ���� * * @param fileName * @param dir * @return */ public static boolean isFileExist(String fileName, String dir) { File files = new File(dir + fileName); return (files.exists()) ? true : false; } /** * �������ļ���,��֤��ͬһ���ļ����²�ͬ�� * * @param fileName * @param dir * @return */ public static String getRandomName(String fileName, String dir) { String[] split = fileName.split("\\.");// ���ļ�����.����ʽ��� String extendFile = "." + split[split.length - 1].toLowerCase(); // ���ļ�����Ч�� Random random = new Random(); int add = random.nextInt(1000000); // ���������10000���� String ret = add + extendFile; while (isFileExist(ret, dir)) { add = random.nextInt(1000000); ret = fileName + add + extendFile; } return ret; } /** * ��������ͼ * * @param file * �ϴ����ļ��� * @param height * ��С�ijߴ� * @throws IOException */ public static void createMiniPic(File file, float width, float height) throws IOException { Image src = javax.imageio.ImageIO.read(file); // ����Image���� int old_w = src.getWidth(null); // �õ�Դͼ�� int old_h = src.getHeight(null); int new_w = 0; int new_h = 0; // �õ�Դͼ�� float tempdouble; if (old_w >= old_h) { tempdouble = old_w / width; } else { tempdouble = old_h / height; } if (old_w >= width || old_h >= height) { // ����ļ�С������ͼ�ijߴ����Ƽ��� new_w = Math.round(old_w / tempdouble); new_h = Math.round(old_h / tempdouble);// ������ͼ���� while (new_w > width && new_h > height) { if (new_w > width) { tempdouble = new_w / width; new_w = Math.round(new_w / tempdouble); new_h = Math.round(new_h / tempdouble); } if (new_h > height) { tempdouble = new_h / height; new_w = Math.round(new_w / tempdouble); new_h = Math.round(new_h / tempdouble); } } BufferedImage tag = new BufferedImage(new_w, new_h, BufferedImage.TYPE_INT_RGB); tag.getGraphics().drawImage(src, 0, 0, new_w, new_h, null); // ������С���ͼ FileOutputStream newimage = new FileOutputStream(file); // ����ļ��� JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage); JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(tag); param.setQuality((float) (100 / 100.0), true);// ����ͼ encoder.encode(tag, param); encoder.encode(tag); // ��JPEG���� newimage.close(); } } /** * �ж��ļ������Ƿ��ǺϷ���,�����ж�allowTypes���Ƿ��contentType * * @param contentType * �ļ����� * @param allowTypes * �ļ������б� * @return �Ƿ�Ϸ� */ public static boolean isValid(String contentType, String[] allowTypes) { if (null == contentType || "".equals(contentType)) { return false; } for (String type : allowTypes) { if (contentType.equals(type)) { return true; } } return false; } }