为什么应该避免使用运行时。java中的exec（）？

Question

   Process p = Runtime.getRuntime().exec(command);
   is = p.getInputStream();
   byte[] userbytes = new byte[1024];
   is.read(userbytes);

我想从java在linux操作系统中执行一个shell命令。但是pmd报告说不要使用java运行时。exec（）。为什么？原因是什么？运行时是否有其他选择。exec（）

Answer 1

除非您停留在一个古老的JVM上，^{}使指定进程、设置其环境、生成它以及处理其文件描述符变得更加容易

This class is used to create operating system processes.

Each ProcessBuilder instance manages a collection of process attributes. The start() method creates a new Process instance with those attributes. The start() method can be invoked repeatedly from the same instance to create new subprocesses with identical or related attributes.

...

Starting a new process which uses the default working directory and environment is easy:

 Process p = new ProcessBuilder("myCommand", "myArg").start();

Here is an example that starts a process with a modified working directory and environment:

 ProcessBuilder pb = new ProcessBuilder("myCommand", "myArg1", "myArg2");
 Map<String, String> env = pb.environment();
 env.put("VAR1", "myValue");
 env.remove("OTHERVAR");
 env.put("VAR2", env.get("VAR1") + "suffix");
 pb.directory(new File("myDir"));
 Process p = pb.start();