File file = new File("C:/Users/dao/Desktop/file.html");  //指定要写到那个文件。
if (!file.exists()) {                //检测是否存在，不存在，新建文件
            try {
                file.createNewFile();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }



try {
            FileOutputStream fileOutputStream = new FileOutputStream(file);           //新建一个文件输出流对象。     
            fileOutputStream.write(content.getBytes());                              //以字节的方式写出。
            fileOutputStream.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    try {
            FileOutputStream fileOutputStream = new FileOutputStream(file);
            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream,"utf-8");
            outputStreamWriter.writer(content);                                               //字符流输出 。
            BufferedWriter bufferedWriter = new BufferedWriter(outputStreamWriter);          //缓存字符流输出。
            bufferedWriter.write(content);
            
//            fileOutputStream.write(content.getBytes());
//            fileOutputStream.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

int tempByte = -1;
while((tempByte=input.read())>0){
fileoutputStream.write(tempByte);
}