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[英]Unable to call a shell script from Java where Shell contains sshpass
[英]unable to call the shell script from java
我正在使用ProcessBuilder
從Java調用Shell腳本,但沒有任何價值。 它顯示為空結果。
這是我的代碼:
package webservice;
import java.io.IOException;
import java.io.InputStream;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Response;
@Path("/hello")
public class HelloWorldService {
@GET
@Path("/{param}/{param2}/{param3}")
public Response getMsg(@PathParam("param") String bedroom,@PathParam("param2") String bathroom,@PathParam("param3")String area) throws IOException {
ProcessBuilder pb = new ProcessBuilder("/script/spark-submit.sh");
pb.environment().put("a", bedroom);
pb.environment().put("b", bathroom);
pb.environment().put("c", area);
Process p=pb.start();
InputStream is = p.getInputStream();
int i =0;
StringBuffer sb = new StringBuffer();
while((i=is.read())!=-1)
sb.append((char)i);
System.out.println("value of sb:"+sb.toString());
String a =sb.toString();
System.out.println("value of a:"+a);
String[] arr = a.split(" ");
if (arr != null)
{
System.out.println("predicted value is " + arr[arr.length - 1]);
}
String output = "predicted value is " + arr[arr.length - 1];
return Response.status(200).entity(output).build();
}
}
Shell腳本代碼
spark-submit --class scalatest.scalatest.scalatest --master local[4] /home/ec2-user/scalatest-0.0.1-SNAPSHOT.jar $a $b $c
嘗試使用
Process p=pb.start();
p.waitFor();
看來您的過程從未真正開始
嘗試使用
try {
Runtime rt = Runtime.getRuntime();
Process p = rt.exec(cmd);
p.waitFor();
BufferedReader buff = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while((line = buff.readLine()) != null){
temp += line;
}
System.out.println(temp);
} catch (Exception e){
e.printStackTrace();
}
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