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lillian — Fri, 09 Oct 2009 07:25:00 GMT

用Properties和RandomAccessFile

1 Properties
用Properties��d��特别��单，以下是一些小�Ҏ��
写文件的时候用BufferedWriter可以自由换行�Q�代替换行符。但是用�q�种�Ҏ��写文件会覆盖掉文件原有的内容�Q�也��是说不能满��加信息的功能
�q�就用到RandomAccessFile�?br />

public class IniRead {
private static Properties ini = null;
    //讄��INI文�g
    static File file=new File("Config-增加.ini");
    static {
        try    {
            ini = new Properties ();
            //加蝲文�g
            ini.load (new FileInputStream (file));
        }catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    private IniRead() {
    }
    /**
     * ��d��INI信息
     * */
    public static String getIniKey (String key) {
        if(!ini.containsKey (key)) {
            return "";
        }
        return ini.get(key).toString ();
    }
    /**
     * 修改INI信息
     * */
    public static void setIniKey (String key, String value) {
        if(!ini.containsKey (key)) {
            return;
        }
        ini.put (key, value);
    }
    /**
     * 保存INI信息
     * */
    public static void saveIni (String k[]) {
        try    {
            FileWriter fw = new FileWriter ("ADViewer.ini");
            BufferedWriter bw = new BufferedWriter (fw);
            bw.newLine ();
            for (int i = 0; i < k.length; i++) {
                bw.write (k[i] + "=" + getIniKey (k[i]));
                System.out.println(getIniKey (k[i]));
                bw.newLine ();
            }

            bw.close ();
            fw.close ();
        }catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

2 RandomAccessFile
一边读一边写�Q�还能移动指�?/p>

/*
     * ��d��需��d��的ini文�g信息�Q��ƈ写入到相应的ini文�g�?br />      */
    public void write(String readFile, String writeFile) throws Exception {

        RandomAccessFile rafRead = new RandomAccessFile(readFile, mode);
        RandomAccessFile rafWrite = new RandomAccessFile(writeFile, mode);
        //按行��d��
        String lineStr = rafRead.readLine();
        while (lineStr != null) {
            // 写入一行后换行
            lineStr += "\r\n";
            //��指针移动到文�g��N��
            rafWrite.seek(rafWrite.length());
            //写入��d��的一�?/span>
            rafWrite.write(lineStr.getBytes());

            lineStr = rafRead.readLine();
        }

    }

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