Question

I want to execute database import from .sql file from java program. My program is working fine on windows. But I am facing problem on linux machine.

Code –

    try {




ProcessBuilder builder = new ProcessBuilder("mysql -u root -p password db-name < db_script.sql");
            builder.redirectErrorStream(true);
            Process pr = builder.start();

            InputStream is = pr.getInputStream();

            // Now read from it and write it to standard output.
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            String line = reader.readLine();
            while (line != null) {
                System.out.println(line);
                line = reader.readLine();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

I am getting – java.io.IOException: Cannot run program “mysql -u root
-p password db-name < db_script.sql”:
java.io.IOException: error=2, No such file or directory

The above command is working fine on linux terminal.
Some one please advice me on this.

Thanks in advance

Answer 1

The < redirection is a shell thing. Try something like this:

ProcessBuilder builder = new ProcessBuilder("/bin/sh", "-c", "mysql -u root -p password db-name <  b_script.sql");

UPDATE:

Otherwise, if you’re using java 7+, you can do the redirection in java:

ProcessBuilder builder = new ProcessBuilder(
        "mysql", "-u", "root", "-p", "password", "db-name");
builder.redirectInput(ProcessBuilder.Redirect.from(new File("b_script.sql")));