上传文件类型验证工具类
1、定义合法文件类型的配置文件allowuploadfiletype.propertiesgif=image/gifjpg=image/jpg,image/jpeg,image/pjpegbmp=image/bmppng=image/pngswf=application/x-shockwave-flashdoc=application/mswordtxt=text/plainxls=application/vnd.ms-excelppt=application/vnd.ms-powerpointpdf=application/pdfexe=application/octet-stream
2、验证工具类(从配置文件中读取可上传文件类型)
package cn.changtusoft.publicplatform.web.forms;import java.io.IOException;import java.util.ArrayList;import java.util.Arrays;import java.util.Iterator;import java.util.List;import java.util.Properties;import java.util.Set;import org.apache.struts.action.ActionForm;import org.apache.struts.upload.FormFile;public class Utils {/** * 存放可上传文件，从配置文件中读取 ** 采用单例模式，只在类加载的时候读取一次，提高性能 */private static Properties pros = new Properties();static {try {pros.load(BaseActionForm.class.getClassLoader().getResourceAsStream("allowuploadfiletype.properties"));} catch (IOException e) {System.out.println("读取定义允许上传文件的配置文件失败!!!");e.printStackTrace();}}/** * 验证允许上传文件类型 ** @param formfile * @return */public boolean validateFileType(FormFile formfile) {if(formfile!=null && formfile.getFileSize()>0){// 用来保存合法文件类型List<String> allowType = new ArrayList<String>();Set keySet = pros.keySet();Iterator ite = keySet.iterator();while (ite.hasNext()) {String key = (String)ite.next();String values = pros.getProperty(key);// 转换为数组，类型String[] valueArray = values.split(",");for (String v : valueArray) {allowType.add(v);}}// 文件后缀名String ext = getFileExt(formfile);// 既判断文件的类型，也判断文件的后缀名，确保安全性return allowType.contains(formfile.getContentType().toLowerCase()) && pros.keySet().contains(ext);}return false;}/** * 验证上传图片格式是否合法 ** @param formfile * @return */public boolean validateImageFileType(FormFile formfile) {if(formfile!=null && formfile.getFileSize()>0){List<String> arrowType = Arrays.asList("image/bmp","image/png","image/gif","image/jpg","image/jpeg","image/pjpeg");return arrowType.contains(formfile.getContentType().toLowerCase());}return false;}/** * 获取文件后缀名 ** 如：abc.gif===> gif ** @param formFile * @return */public String getFileExt(FormFile formFile) {if (formFile != null) {String fileName = formFile.getFileName();return fileName.substring(fileName.lastIndexOf(".")+1);}return null;}}
页:
[1]