从Java执行Shell脚本,具有读取操作的Shell脚本


问题内容

我有一个读取输入的Shell脚本

#!/bin/bash
echo "Type the year that you want to check (4 digits), followed by [ENTER]:"
read year
echo $year

我正在使用JAVA APi执行此Shell脚本

ProcessBuilder pb = new ProcessBuilder("/bin/bash", "/junk/leaptest.sh");
final Process process = pb.start();

InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;


while ((line = br.readLine()) != null) {
    System.out.println(line);       
}
System.out.println("Program terminated!");

在Java控制台中,我可以看到输出

键入要检查的年份(4位数字),然后按[ENTER]:

现在,如何将值传递到我脚本中的Shell脚本中的实际问题是如何读取变量“ year”


我已经按照建议编辑了代码,但在我们更正的地方无法正常工作

ProcessBuilder pb = new ProcessBuilder("/bin/bash", "-c", "/junk/leaptest.sh");
final Process process = pb.start();
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
/*
 * OutputStream os = process.getOutputStream(); PrintWriter pw = new
 * PrintWriter(os);
 */

BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
while ((line = br.readLine()) != null) {
    System.out.println(line);
    // pw.println("8999");
    bw.write("2012");
}
System.out.println("Program terminated!");

问题答案:

要将执行脚本的Java程序中的值传递给脚本,请使用命令行参数。如果要将信息从脚本发送回Java程序,请在脚本中打印该值,请在Java程序中读取脚本的STDOUT并进行解析。

你真的快到了。现在,您正在读取脚本输出(进入while循环),但是您只是在打印它。解析输出并执行所需的操作。