调用Runtime.getRuntime()。EXEC() [英] Runtime.getRuntime().exec()
问题描述
我只能在数据库名称包含like(new database(myid)等时才能读取文件。
我给出以下示例代码:
I can not read a file only when database name contains like (new database (myid) etc. I give a following example code:
dumpCommand = "C:/Program Files/MySQL/MySQL Server 5.0/bin/mysqldump -h"+hostName+user+databaseName;
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(dumpCommand);
InputStream in = proc.getInputStream();
BufferedReader br=new BufferedReader(new InputStreamReader(in));
String line =null;
while((line=br.readLine())!=null)
{
//able to read line only when database name like abc,datastore etc...
System.out.println(line);
}
假设我的数据库名称de mo表示当我打印行时,我得到的数据库名称就像de only。
当数据库名称为空格时是否可以?
Suppose my database name de mo means when I print line I got database name like de only. Is possible when database name with empty space?
推荐答案
你熟悉 exec
双引号错误吗?(对于 Runtime.exec
或 ProcessBuilder
)
Are you familiar with the exec
double-quotes bug? (for Runtime.exec
or ProcessBuilder
)
您可以尝试:
Runtime.getRuntime().exec(new String[] {
"\"C:/Program Files/MySQL/MySQL Server 5.0/bin/mysqldump\"",
"-h",
hostName+user+databaseName});
只需确保您传递的所有参数都不包含双引号(而 not 以双引号开头)
(参见 bug 6511002 )
Just make sure none of your parameters you will have to pass contains double quotes (while not beginning with double quotes)
(see bug 6511002)
任何参数如:
mykey="my value with space"
将内部(通过 getRuntime()
实施)更改为
"mykey="myvalue with space""
如果是这样的话,你需要对参数进行标记化:
If that is the case, you would need to tokenize the argument:
{"mykey=\"my\"" , "\"value with space\""}
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