在 java 运行时 Process.waitFor() 中执行 mysql restore 命令总是返回 1

Question

下面的代码总是返回1。我不明白为什么。

String executeCmd[] = {"mysql"," -u" + dbUser," -p" + dbPass," -A"," -D"+dbName ," < " + restorePath};

Process runtimeProcess = Runtime.getRuntime().exec(executeCmd);
int processComplete = runtimeProcess.waitFor();

if (processComplete == 0) {
    System.out.println("Successfully restored from SQL : " + s);
} else {
    System.out.println("Error at restoring");
}

Answer 1

我绞尽脑汁想解决这个问题一个星期，终于弄明白了。

问题是，上面代码中的<（流重定向）。在 Java 中执行进程时不能使用流重定向（在这种情况下根本不起作用）。

因此，您必须在不使用流重定向的情况下执行此操作。一种方法是：

mysql -u root -p**** --execute "SOURCE \\path\\to\\sql"

试试：

String executeCmd[] = {"mysql"," -u "+dbUser," -p"+dbPass," -A"," -D"+dbName," --execute"," \"SOURCE "+restorePath+"\""};

或者简单地说：

String executeCmd = "mysql -u "+dbUser+" -p"+dbPass+" -A -D "+"dbName -e \"SOURCE "+restorePath+"\"";

Answer 2

重定向< 由命令外壳解释。试试

String executeCmd[] =
       {"bash", "-c", "mysql", "-u", dbUser, "-p", dbPass, "-A","-D", dbName , "< ", restorePath};