java - 通过 Java 进程生成器执行 bash

Question

我试图通过 JAVA 代码执行脚本，但它没有被执行。我尝试了 Process 类的 execute()，但经过一番搜索希望能够实现此目的后，我切换到 ProcessBuilder。但脚本没有被执行。

JAVA代码:

String fileName = "pkgdiff.sh";
File file = new File(fileName);
ProcessBuilder builder = new ProcessBuilder("/bin/sh", fileName);
builder.directory(file.getParentFile());
Process process = builder.start();
process.waitFor();
StringBuffer output = new StringBuffer();
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line = "";                       
while ((line = reader.readLine())!= null) {
    output.append(line + "\n");
}
LOGGER.info("### Script Execution result --> " + fileName+"-->" + output);

脚本文件:

#!/bin/sh
.. rest of the content

Answer 1

脚本产生了多少输出？您应该在调用 waitFor() 之前处理其输出，否则如果填满了输出缓冲区，进程可能会阻塞。

来自Java API :

Because some native platforms only provide limited buffer size for standard input and output streams, failure to promptly write the input stream or read the output stream of the subprocess may cause the subprocess to block, or even deadlock.