I wanted to backup a MySQL database using ProcessBuilder
and the >
character is not being interpreted as I expected. This is my code:
java.util.List<String> cmd = new java.util.ArrayList<>();
cmd.add("mysqldump");
cmd.add("-u");
cmd.add("root");
cmd.add("-p"+password);
cmd.add("DBx");
cmd.add(">");
cmd.add("DBbk.sql");
ProcessBuilder pb = new ProcessBuilder(cmd);
pb.directory(new File("."));
Process p = pb.start();
p.waitFor();
BufferedReader err = new BufferedReader(new InputStreamReader(p.getErrorStream()));
while((line = err.readLine()) != null) {
System.out.println(line);
}
The output is:
Warning: Using a password on the command line interface can be insecure. mysqldump: Couldn't find table: ">"
The process builder is executing the program directly, not executing it through a shell/command prompt. Therefore, you don't get any nice features of the shell like the >
character for redirection. Sorry.
Give this a try (just displaying the significant portion of the solution):
new ProcessBuilder("cmd", "/C", "your_command > DBbk.sql").start()
This way you're explicitly calling cmd
. In Linux you could call bash
or whatever shell you use.
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