如何将长字符串压缩到文件中并检索它

Question

我正在尝试将长字符串压缩到文件中并检索它。

以下代码不起作用。它检索到的是胡言乱语。

public static void main(String args[]) {
    try {
        // Creating base for data
        StringBuilder sbb = new StringBuilder();
        for (int i=0;i<1000;i++)
            sbb.append("ùertyty!|").append(Integer.toString(i));
        File FileAll = new File(".\All.data");
        FileAll.createNewFile();
        // Zipping into file
        DeflaterOutputStream g = new DeflaterOutputStream(
                new FileOutputStream(FileAll));
        OutputStreamWriter osw = new OutputStreamWriter(g);
        String base = sbb.toString();
        osw.write(base);
        osw.close();
        FileInputStream ALL_FIS = new FileInputStream(FileAll);
        // Re-reading from file
        DeflaterInputStream dis = new DeflaterInputStream(ALL_FIS);
        InputStreamReader isr = new InputStreamReader(dis);
        StringBuilder sb = new StringBuilder();
        char[] c = new char[1000];
        int count = isr.read(c);
        while ( count != -1 ) {
            sb.append(c, 0, count);
            count = isr.read(c);
        }
        isr.close();
        String retr = sb.toString();
        System.out.println("Are equal: " + retr.equals(base));
        System.out.println("Base: " + base);
        System.out.println("Retr: " + retr);
    } catch (IOException e) {
        System.err.println(e.toString());
    }
}

我做错了什么？

PS：似乎DeflaterInputStream没有完成它的工作，并按原样返回文件的内容。

Answer 1

您需要使用 InflaterInputStream（解压缩）而不是 DeflaterInputStream

http://download.oracle.com/javase/1.5.0/docs/api/java/util/zip/InflaterInputStream.html