/**
* 字节流，传入的字符串，输出文件；服务器不保存文件，不用指定文件路径
*
* @param response
* @param count
* 传入的字符串
* @param fileName
* 要保存的文件名
* @return success or error
* @throws Exception
*/
public static String downStream(HttpServletResponse response, String count,
String fileName) throws Exception {
String msg = null;
try {
ServletOutputStream ou = response.getOutputStream();
// 下载文件
byte bb[] = count.getBytes();//获取内容的字节
// ByteArrayInputStream把字节数组当作源的输入流
ByteArrayInputStream fileInputStream = new ByteArrayInputStream(bb);
response.setContentType("application/x-msdownload;charset=UTF-8");// 弹出下载的框
int filelen = fileInputStream.available();
response.setContentLength(filelen);// 下载统计文件大小的进度
response.setHeader("Content-Disposition", "attachment; filename="
+ new String(fileName.getBytes(), "ISO-8859-1")); // 设置响应头和下载保存的文件名
// response.setContentType("application/octet-stream;charset=UTF-8");
// 下载框的信息
if (fileInputStream != null) {
// 文件太大时内存不能一次读出,要循环
byte a[] = new byte[1024];
int n = 0;
while (n != -1) {
n = fileInputStream.read(a);
if (n > 0) {
ou.write(a, 0, n);
}
}
}
fileInputStream.close();
ou.close();
msg = "success";
} catch (Exception e) {
e.printStackTrace();
msg = "error";
}
return msg;
}
/**
* 写入文本
*
* @param path
* 如：d:/file/
* @param content
* @param fileName
* 如：data.text
* @return success or error
*/
public static String writeFile(String path, String fileName, String content) {
try {
File pah = new File(path);
File file = new File(path + "\" + fileName);
if (!pah.exists()) {
pah.mkdirs();
file.createNewFile();
}
FileWriter write = new FileWriter(file);
PrintWriter print = new PrintWriter(write);
print.write(content);
write.close();
print.close();
return "success";
} catch (Exception e) {
e.printStackTrace();
return "error";
}
}