/**
* 设置让浏览器弹出下载对话框的Header.
*
* @param fileName 下载后的文件名.
*/
public static void setFileDownloadHeader(
HttpServletRequest request, HttpServletResponse response, String fileName) {
// 中文文件名支持
String encodedfileName = null;
// 替换空格，否则firefox下有空格文件名会被截断,其他浏览器会将空格替换成+号
encodedfileName = fileName.trim().replaceAll(" ", "_");
String agent = request.getHeader("User-Agent");
boolean isMSIE = (agent != null && agent.toUpperCase().indexOf("MSIE") != -1);
if (isMSIE) {
encodedfileName = Encodes.urlEncode(fileName);
} else {
encodedfileName = new String(fileName.getBytes(), Charsets.ISO_8859_1);
}
response.setHeader(
HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + encodedfileName + "\"");
}
/** 基于Base62编码的SecureRandom随机生成bytes. */
public static String randomBase62(int length) {
byte[] randomBytes = new byte[length];
random.nextBytes(randomBytes);
return Encodes.encodeBase62(randomBytes);
}
/** 客户端对Http Basic验证的 Header进行编码. */
public static String encodeHttpBasic(String userName, String password) {
String encode = userName + ":" + password;
return "Basic " + Encodes.encodeBase64(encode.getBytes());
}
/**
* 替换为手机识别的HTML，去掉样式及属性，保留回车。
*
* @param txt
* @return
*/
public static String toHtml(String txt) {
if (txt == null) {
return "";
}
return replace(replace(Encodes.escapeHtml(txt), "\n", "<br/>"), "\t", " ");
}
