-2

我有以下命令，我从命令行使用它来导入 mysql 备份 -

mysql -hlocalhost -uroot -pmysql dpfinal < /home/kshitiz/Desktop/dbdump.sql

当我从命令行调用此命令时，它运行良好。但是当我使用以下 Java 代码时它不起作用 -

String command = "mysql -hlocalhost -uroot -pmysql dpfinal < /home/kshitiz/Desktop/dbdump.sql";
InputStream is = Runtime.getRuntime().exec(command).getInputStream();
InputStreamReader ir = new InputStreamReader(is);
BufferedReader br = new BufferedReader(ir);
String s = br.readLine();
while(s!= null) {
    System.out.println(s);
    s = br.readLine();
}

我得到以下输出 -

mysql  Ver 14.14 Distrib 5.5.28, for debian-linux-gnu (i686) using readline 6.2
Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Usage: mysql [OPTIONS] [database]
  -?, --help          Display this help and exit.
  -I, --help          Synonym for -?
  --auto-rehash       Enable automatic rehashing. One doesn't need to use
                      'rehash' to get table and field completion, but startup
                      and reconnecting may take a longer time. Disable with
                      --disable-auto-rehash.
                      (Defaults to on; use --skip-auto-rehash to disable.)
  -A, --no-auto-rehash 
                      No automatic rehashing. One has to use 'rehash' to get
                      table and field completion. This gives a quicker start of
                      mysql and disables rehashing on reconnect.
  --auto-vertical-output 
                      Automatically switch to vertical output mode if the
                      result is wider than the terminal width.
  -B, --batch         Don't use history file. Disable interactive behavior.
                      (Enables --silent.)
  --character-sets-dir=name 
                      Directory for character set files.
  --column-type-info  Display column type information.
4

1 回答 1

3

该mysql命令不是解释标准输入重定向 ( <) 的命令。为此，您必须执行一个 shell 程序并将您希望执行的命令作为参数传递给它 ( mysql)。

于 2013-09-18T09:13:53.493 回答