java文件下载工具类

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/** * Desc:下载工具类 * @date 2014-6-26 */public class DownLoadUtil {/** * Desc:根据文件头判断请求来自的浏览器，以便有针对性的对文件名转码 * @date 2014-6-26  * @param request * @return * @throws Exception */public static String transFileName(String fileName, HttpServletRequest request) {String agent = request.getHeader("USER-AGENT");  //fileName = fileName.trim();//去首尾空格try {//根据文件头判断请求来自的浏览器，以便有针对性的对文件名转码if(null != agent && -1 != agent.indexOf("theworld")){//世界之窗fileName = new String(fileName.getBytes("gb2312"), "ISO8859-1"); //解决下载的文件名中含有小括号转变义符%28%29}else if(null != agent && -1 != agent.indexOf("MSIE 8.0")){//IE8String lenFileName = URLEncoder.encode(fileName, "UTF-8");if (lenFileName.length() > 150) {//文件名长度是否大于150个字符fileName = new String(fileName.getBytes("gb2312"), "ISO8859-1"); } else {fileName = URLEncoder.encode(fileName,"UTF-8").replace("+","%20");}}else if(null != agent && -1 != agent.indexOf("MSIE 7.0") && -1 != agent.indexOf("SE 2.X MetaSr 1.0")){//sogo浏览器fileName = URLEncoder.encode(fileName,"UTF-8").replace("+","%20");}else if(null != agent && (-1 != agent.indexOf("SV1") || -1 != agent.indexOf("360SE"))){//360安全浏览器String lenFileName = URLEncoder.encode(fileName, "UTF-8");if (lenFileName.length() > 150) {//文件名长度是否大于150个字符fileName = new String(fileName.getBytes("gb2312"), "ISO8859-1"); } else {fileName = URLEncoder.encode(fileName,"UTF-8").replace("+","%20");}}else if(null != agent && -1 != agent.indexOf("Chrome")){//googlefileName = new String(fileName.getBytes("gb2312"), "ISO8859-1"); //解决下载的文件名中含有小括号转变义符%28%29}else if(null != agent && -1 != agent.indexOf("Firefox")){//FirefoxfileName = new String(fileName.getBytes("gb2312"), "ISO8859-1"); }else if(null != agent && -1 != agent.indexOf("Safari")){//FirefoxfileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1"); }else {//其它浏览器fileName = new String(fileName.getBytes("gb2312"), "ISO8859-1"); }} catch (Exception e) {throw new RuntimeException("transFileName error", e);}return fileName;}}
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