Question

我正在实现自己的Web服务器。以下方法搜索服务器端包含并适当地构建html页面。

public String getSSI(String content) throws IOException {



    String beginString = "<!--#INCLUDE VIRTUAL=\"";
    String endString = "\"-->";

    int beginIndex = content.indexOf(beginString);
    while (beginIndex != -1) {
        int endIndex = content.indexOf(endString, beginIndex);
        String includePath = content.substring(beginIndex+beginString.length(), endIndex);

        File includeFile = new File(BASE_DIR+includePath);
        byte[] bytes = new byte[(int) includeFile.length()];
        FileInputStream in = new FileInputStream(includeFile);    
        in.read(bytes);
        in.close();

        String includeContent = new String(bytes);
        includeContent = getSSI(includeContent);

        content = content.replaceAll(beginString+includePath+endString, includeContent);

        beginIndex = content.indexOf(beginString);
    }

    return content;
}

String beginString = ""; int beginIndex = content.indexOf(beginString); while (beginIndex != -1) { int endIndex = content.indexOf(endString, beginIndex); String includePath = content.substring(beginIndex+beginString.length(), endIndex); File includeFile = new File(BASE_DIR+includePath); byte[] bytes = new byte[(int) includeFile.length()]; FileInputStream in = new FileInputStream(includeFile); in.read(bytes); in.close(); String includeContent = new String(bytes); includeContent = getSSI(includeContent); content = content.replaceAll(beginString+includePath+endString, includeContent); beginIndex = content.indexOf(beginString); } return content; }

我知道StringBuilder比String更快，但是我能做的就是优化它吗？原始数据被读入字节数组并转换为字符串，此时它将传递给此方法，输出将转换回字节数组并发送到客户端。

Answer 1

我不知道这会产生多大的影响，但是您可以使用IOUtils toString(InputStream)方法直接读取String，而不是读入字节数组并转换为String。同样，您可以write the String directly to an OutputStream。

如何优化此String搜索/替换方法？

1 个答案: