如何将 ProcessBuilder 的输出重定向到字符串? [英] How to redirect ProcessBuilder's output to a string?

问题描述

我正在使用以下代码启动流程构建器.我想知道如何将其输出重定向到 String.

I am using the following code to start a process builder.I want to know how can I redirect its output to a String.

ProcessBuilder pb = new ProcessBuilder(
    System.getProperty("user.dir") + "/src/generate_list.sh", filename);
Process p = pb.start();

我尝试使用 ByteArrayOutputStream 但它似乎不起作用.

I tried using ByteArrayOutputStream but it didn't seem to work.

推荐答案

从 InputStream 读取.您可以将输出附加到 StringBuilder:

Read from the InputStream. You can append the output to a StringBuilder:

BufferedReader reader = 
                new BufferedReader(new InputStreamReader(process.getInputStream()));
StringBuilder builder = new StringBuilder();
String line = null;
while ( (line = reader.readLine()) != null) {
   builder.append(line);
   builder.append(System.getProperty("line.separator"));
}
String result = builder.toString();

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