如何轻松地将BufferedReader转换为String？ [英] How to easily convert a BufferedReader to a String?

问题描述

@POST
@Path("/getphotos")
@Produces(MediaType.TEXT_HTML)
public String getPhotos() throws IOException{
    // DataInputStream rd = new DataInputStream(request.getInputStream());
    BufferedReader rd = new BufferedReader(
        new InputStreamReader(request.getInputStream(), "UTF-8")
    );
    String line = null;
    String message = new String();
    final StringBuffer buffer = new StringBuffer(2048);
    while ((line = rd.readLine()) != null) {
        // buffer.append(line);
        message += line;
    }
    System.out.println(message);
    JsonObject json = new JsonObject(message);
    return message;
}

上面的代码适用于我的servlet。它的目的是获取一个流，从中生成一个Json文件，然后将Json发送回客户端。
但是为了制作Json，我必须使用while循环读取 BufferedReader object rd 。但是，我想将 rd 转换为尽可能少的代码行。我该怎么做？

The code above is for my servlet. Its purpose is to get a stream, make a a Json file from it, and then send the Json to the client back. But in order to make Json, I have to read BufferedReader object rd using a "while" loop. However I'd like to convert rd to string in as few lines of code as possible. How do I do that?

推荐答案

我建议使用commons IO库 - 那么它是一个简单的1个班轮：

I suggest using commons IO library - then it is a simple 1 liner:

String message = org.apache.commons.io.IOUtils.toString(rd);

当然，请注意使用此机制，可以通过发送拒绝服务攻击一个永无止境的数据流，它将填满你的服务器内存。

of course, be aware that using this mechanism, a denial of service attack could be made, by sending a never ending stream of data that will fill up your server memory.

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