util(图片验证工具类ImageUtils)

package com.guwenren.utils;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
/**
 * 图片验证工具类
 * @author guwenren
 *
 */
public class ImageUtils {
    private static Properties properties = new Properties();
    static {
        try {
            properties.load(ImageUtils.class.getClassLoader()
                    .getResourceAsStream("arrowuploadfiletype.properties"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 验证上传文件类型是否属于图片格式
     * 
     * @return
     */
    public static boolean validateImageFileType(File logofile,
            String logofileFileName, String logofileContentType) {
        if (logofile != null && logofile.length() > 0) {
            // 类型
            List<String> arrowType = Arrays.asList("image/bmp", "image/png",
                    "image/gif", "image/jpg", "image/jpeg", "image/pjpeg");
            // 后缀名
            List<String> arrowExtension = Arrays.asList("gif", "jpg", "bmp",
                    "png");
            String ext = getExt(logofileFileName);

            return arrowType.contains(logofileContentType.toLowerCase())
                    && arrowExtension.contains(ext);
        }
        return false;
    }

    /**
     * 验证上传文件是否属于图片/flash动画/word文件/exe文件/pdf文件/TxT文件/xls文件/ppt文件
     * 
     * @param formfile
     * @return
     */
    public static boolean validateFileType(File file, String fileName,
            String fileType) {
        if (file != null && file.length() > 0) {
            String ext = getExt(fileName);// 得到上传文件的后缀名
            List<String> arrowType = new ArrayList<String>();// 存储所有验证通过的文件类型
            for (Object key : properties.keySet()) {
                String value = (String) properties.get(key);
                String[] values = value.split(",");
                for (String v : values) {
                    arrowType.add(v.trim());
                }
            }
            // 1文件的类型是否符合 2文件的后缀名是否符合
            return arrowType.contains(fileType)
                    && properties.keySet().contains(ext);
        }
        return false;

    }

    /**
     * 获取文件.后面的名称(.gif/gif)小写形式
     * 
     * @return
     */
    public static String getExt(String fileName) {
        if (fileName != null && !"".equals(fileName)) {
            return fileName.substring(fileName.lastIndexOf('.') + 1)
                    .toLowerCase();
        }
        return null;
    }
    /**
     * 保存产品图片
     * @param imageName
     * @param imagefile
     * @param typeid
     * @param productid
     * @throws IOException
     */
    public static void saveProductImage(String imageName,File imagefile,Integer typeid,Integer productid) throws IOException{
        // 图片后缀
        String ext=getExt(imageName);
        // 保存路径
        String saveimagepath = "/images/product/"+ typeid + "/"+ productid + "/prototype";
        // 真实路径
        String realimagepath = ServletActionContext.getServletContext().getRealPath(saveimagepath);
        File file = new File(realimagepath);
        if (!file.exists()) {
            file.mkdirs();
        }
        
        FileUtils.copyFile(imagefile, new File(realimagepath, imageName));
        
        // 保存路径
        String saveimagepath140 = "/images/product/"+ typeid + "/"+ productid + "/140x";
        // 真实路径
        String realimagepath140 = ServletActionContext.getServletContext().getRealPath(saveimagepath140);
        File file140 = new File(realimagepath140);
        if (!file140.exists()) {
            file140.mkdirs();
        }
        ImageSizer.resize(new File(realimagepath,imageName), new File(realimagepath140,imageName), 140, ext);
        
    }
}