/**
     * 写入文件内容
     * */
    public void WriteTxt(String strTxt) {
        File filename = new File("c:\\IvoCall\\IvoCall.txt");
        try {
            this.IsCreatedFile();
            if (!filename.exists()) {
                filename.createNewFile();
            }
            BufferedWriter output = new BufferedWriter(new FileWriter(filename));
            output.write(strTxt);
            output.close();
        } catch (IOException e1) {
            // TODOe 自动生成 catch 块
            e1.printStackTrace();
        }
    }

/**
     * HTML中调用创建文件
     * **/
    public void RunWriteTxt(final String strTxt) {
        String result = AccessController
                .doPrivileged(new PrivilegedAction<String>() {
                    @Override
                    public String run() {
                        String res = null;
                        WriteTxt(strTxt);
                        return res;
                    }
                });
    }