java 产生TXT文件要被安卓解析，产生的文件编码必须是UTF-8 BOM的编码
什么是BOM
BOM（byte-order mark），即字节顺序标记，它是插入到以UTF-8、UTF16或UTF-32编码Unicode文件开头的特殊标记，用来识别Unicode文件的编码类型。对于UTF-8来说，BOM并不是必须的，因为BOM用来标记多字节编码文件的编码类型和字节顺序（big-endian或little-endian）。
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public static String androidWriteFile(String desFilePath,String content)
?{
??String result = "ok";
??FileOutputStream fos = null;
??OutputStreamWriter writer= null;
??try {
????? char BOM = (char)65279;
???File file = new File(desFilePath);
???fos = new FileOutputStream(file);
???writer = new OutputStreamWriter(fos,"UTF-8");
???writer.write(BOM);
???writer.write(content);
??} catch (Exception e) {
???// TODO: handle exception
??}
??finally{
???try {
????writer.flush();
????writer.close();
????fos.close();
????
???} catch (Exception e2) {
????e2.printStackTrace();
????System.out.print(e2.getMessage());
????result = "创建文件失败!";
???}
??}
??return result;
?}
