java下载txt文本文件

java下载txt文本文件

/**
 * 导出格式.txt
 */
public class TextDownloader {
    private Logger logger = Logger.getLogger(TextDownloader.class);

    /* 导出txt文件
     * @author
     * @param	response
     * @param	text 导出的字符串
     * @return
     */
    public void exportTxt(String fileName, HttpServletResponse response, String text) {
        logger.info("导出中.............");
        response.setCharacterEncoding("utf-8");
        //设置响应的内容类型
        response.setContentType("text/plain");
        //设置文件的名称和格式
        response.addHeader("Content-Disposition", "attachment;filename="
                + genAttachmentFileName(fileName, "JSON_FOR_UCC_")//设置名称格式，没有这个中文名称无法显示
                + ".txt");
        BufferedOutputStream buff = null;
        ServletOutputStream outStr = null;
        try {
            outStr = response.getOutputStream();
            buff = new BufferedOutputStream(outStr);
            buff.write(text.getBytes("UTF-8"));
            buff.flush();
            buff.close();
        } catch (Exception e) {
            //LOGGER.error("导出文件文件出错:{}",e);
        } finally {
            try {
                buff.close();
                outStr.close();
            } catch (Exception e) {
                //LOGGER.error("关闭流对象出错 e:{}",e);
            }
            logger.info("导出结束.............");
        }
    }

    //防止中文文件名显示出错
    public String genAttachmentFileName(String cnName, String defaultName) {
        try {
            cnName = new String(cnName.getBytes("gb2312"), "ISO8859-1");
        } catch (Exception e) {
            cnName = defaultName;
        }
        return cnName;
    }
}