Python在Java中的调用并不是直接运行Python代码,而是通过Java程序调用Python解释器来执行Python脚本。以下是一些在Java中调用Python的技巧:
try {
ProcessBuilder pb = new ProcessBuilder("python", "myscript.py");
Process process = pb.start();
// 可以使用process.getInputStream()、process.getOutputStream()和process.getErrorStream()来读取和写入进程的输入/输出/错误流
int exitCode = process.waitFor();
System.out.println("Exit code: " + exitCode);
} catch (IOException | InterruptedException e) {
e.printStackTrace();
}
ProcessBuilder pb = new ProcessBuilder("python", "myscript.py", "arg1", "arg2");
try {
ProcessBuilder pb = new ProcessBuilder("python", "myscript.py");
Process process = pb.start();
Thread outputThread = new Thread(() -> {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
} catch (IOException e) {
e.printStackTrace();
}
});
outputThread.start();
int exitCode = process.waitFor();
outputThread.join();
System.out.println("Exit code: " + exitCode);
} catch (IOException | InterruptedException e) {
e.printStackTrace();
}
try {
ProcessBuilder pb = new ProcessBuilder("python", "myscript.py");
Process process = pb.start();
Thread errorThread = new Thread(() -> {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()))) {
String line;
while ((line = reader.readLine()) != null) {
System.err.println(line);
}
} catch (IOException e) {
e.printStackTrace();
}
});
errorThread.start();
int exitCode = process.waitFor();
errorThread.join();
System.out.println("Exit code: " + exitCode);
} catch (IOException | InterruptedException e) {
e.printStackTrace();
}