java - 从 Java 运行 shell 脚本

Question

我在尝试从 Java 运行 sh 脚本时遇到问题。我已经尝试过 similar problems at stack overflow的解决方案。

问题不是脚本本身的调用，而是命令pg_dump:

=> 如果我从控制台运行以下脚本 ./my_script.sh 一切都会正常:

NOW="$(date +%Y%m%d_%H%M%S)"
BACKUP_FILE="backup_${NOW}.sql"    
FOLDER="./backups"
if [ ! -d "$FOLDER" ]; then
  mkdir $FOLDER
fi
OUTPUT=${FOLDER}/${BACKUP_FILE}

HOST="my.host.dir"
PORT="8080"
DB_NAME="dbName"
USER="user"
PASS="pass"

OPT="-h ${HOST} -p ${PORT} -U ${USER} -f ${OUTPUT} -c -C -i -b -v ${DB_NAME}"
EXPORT="export PGPASSWORD=${PASS}"
RUN="pg_dump ${OPT}"
echo ${EXPORT}
echo ${RUN}
$EXPORT
$RUN

=> 但如果我想从 Java 代码中调用它，echo 命令会成功(因此脚本已被调用)，但 pg_dump 命令不会成功:

int exitValue = 0;
try {
  ProcessBuilder pb = new ProcessBuilder(scriptPath);
  Process p = pb.start();
  BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
  String line = null;
  while ((line = reader.readLine()) != null) {
    LOG.log(Level.FINE, line);
  }
  exitValue = p.waitFor();
  LOG.log(Level.FINE, "Process exitValue: " + exitValue);
} catch (IOException | InterruptedException e) {
  LOG.log(Level.SEVERE, "Executing " + scriptPath, e);
  return false;
}
return exitValue == 0;

我的问题是为什么控制台中的相同脚本成功但不从 Java 调用它？

Answer 1

你可以试试这个

 try {
       ProcessBuilder pb = new ProcessBuilder("script.sh");
       Process p = pb.start();     
       p.waitFor();                
       System.out.println("Script executed Finish");
     } 
     catch (Exception e) 
     {
      e.printStackTrace();
    }