我正在尝试使用java导入使用mysqldump.exe文件创建的mysql转储。创建转储文件没有问题，但问题是当我尝试导入它时总是失败。
这是我的方法代码：
public boolean restoreDatabase(String path, String mySqlPath)
{
List<String> args = new ArrayList<String>();
mySqlPath = "C:/wamp/bin/mysql/mysql5.5.24/bin/mysql.exe";
args.add(mySqlPath);
// Comands
args.add("-u ");
args.add("root");
args.add("--password=123");
args.add("testingimport");
args.add("<");
path = "C:/Users/Kasper/Documents/testingimport.sql";
args.add(path);
try{
ProcessBuilder pb = new ProcessBuilder(args);
pb.redirectError();
Process p = pb.start();
InputStream is = p.getInputStream();
int in = -1;
while((in = is.read()) != -1)
{
System.out.print(""+(char) in);
}
int proccessCompleted = p.waitFor();
if(proccessCompleted == 0)
{
System.out.println("Dump done!");
return true;
}
else
{
System.out.println("Error doing dump!");
return false;
}
}
catch(IOException | InterruptedException ex)
{
System.out.println("Exception exportDB -> " + ex.getMessage() + "|" + ex.getLocalizedMessage());
}
return false;
}
这是完整的输出代码：
Args: [C:\wamp\bin\mysql\mysql5.5.24\bin\mysql.exe, -u , root, --password=123, testingimport, <, C:/Users/Kasper/Documents/testingimport.sql]
C:\wamp\bin\mysql\mysql5.5.24\bin\mysql.exe Ver 14.14 Distrib 5.5.24, for Win64 (x86)
Copyright (c) 2000, 2011, 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: C:\wamp\bin\mysql\mysql5.5.24\bin\mysql.exe [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.
-c, --comments Preserve comments. Send comments to the server. The
default is --skip-comments (discard comments), enable
with --comments.
-C, --compress Use compression in server/client protocol.
-#, --debug[=#] This is a non-debug version. Catch this and exit.
--debug-check Check memory and open file usage at exit.
-T, --debug-info Print some debug info at exit.
-D, --database=name Database to use.
--default-character-set=name
Set the default character set.
--delimiter=name Delimiter to be used.
-e, --execute=name Execute command and quit. (Disables --force and history
file.)
-E, --vertical Print the output of a query (rows) vertically.
-f, --force Continue even if we get an SQL error.
-G, --named-commands
Enable named commands. Named commands mean this program's
internal commands; see mysql> help . When enabled, the
named commands can be used from any line of the query,
otherwise only from the first line, before an enter.
Disable with --disable-named-commands. This option is
disabled by default.
-i, --ignore-spaces Ignore space after function names.
--init-command=name SQL Command to execute when connecting to MySQL server.
Will automatically be re-executed when reconnecting.
--local-infile Enable/disable LOAD DATA LOCAL INFILE.
-b, --no-beep Turn off beep on error.
-h, --host=name Connect to host.
-H, --html Produce HTML output.
-X, --xml Produce XML output.
--line-numbers Write line numbers for errors.
(Defaults to on; use --skip-line-numbers to disable.)
-L, --skip-line-numbers
Don't write line number for errors.
-n, --unbuffered Flush buffer after each query.
--column-names Write column names in results.
(Defaults to on; use --skip-column-names to disable.)
-N, --skip-column-names
Don't write column names in results.
--sigint-ignore Ignore SIGINT (CTRL-C).
-o, --one-database Ignore statements except those that occur while the
default database is the one named at the command line.
-p, --password[=name]
Password to use when connecting to server. If password is
not given it's asked from the tty.
-W, --pipe Use named pipes to connect to server.
-P, --port=# Port number to use for connection or 0 for default to, in
order of preference, my.cnf, $MYSQL_TCP_PORT,
/etc/services, built-in default (3306).
--prompt=name Set the mysql prompt to this value.
--protocol=name The protocol to use for connection (tcp, socket, pipe,
memory).
-q, --quick Don't cache result, print it row by row. This may slow
down the server if the output is suspended. Doesn't use
history file.
-r, --raw Write fields without conversion. Used with --batch.
--reconnect Reconnect if the connection is lost. Disable with
--disable-reconnect. This option is enabled by default.
(Defaults to on; use --skip-reconnect to disable.)
-s, --silent Be more silent. Print results with a tab as separator,
each row on new line.
--shared-memory-base-name=name
Base name of shared memory.
-S, --socket=name The socket file to use for connection.
--ssl Enable SSL for connection (automatically enabled with
other flags).
--ssl-ca=name CA file in PEM format (check OpenSSL docs, implies
--ssl).
--ssl-capath=name CA directory (check OpenSSL docs, implies --ssl).
--ssl-cert=name X509 cert in PEM format (implies --ssl).
--ssl-cipher=name SSL cipher to use (implies --ssl).
--ssl-key=name X509 key in PEM format (implies --ssl).
--ssl-verify-server-cert
Verify server's "Common Name" in its cert against
hostname used when connecting. This option is disabled by
default.
-t, --table Output in table format.
--tee=name Append everything into outfile. See interactive help (\h)
also. Does not work in batch mode. Disable with
--disable-tee. This option is disabled by default.
-u, --user=name User for login if not current user.
-U, --safe-updates Only allow UPDATE and DELETE that uses keys.
-U, --i-am-a-dummy Synonym for option --safe-updates, -U.
-v, --verbose Write more. (-v -v -v gives the table output format).
-V, --version Output version information and exit.
-w, --wait Wait and retry if connection is down.
--connect-timeout=# Number of seconds before connection timeout.
--max-allowed-packet=#
The maximum packet length to send to or receive from
server.
--net-buffer-length=#
The buffer size for TCP/IP and socket communication.
--select-limit=# Automatic limit for SELECT when using --safe-updates.
--max-join-size=# Automatic limit for rows in a join when using
--safe-updates.
--secure-auth Refuse client connecting to server if it uses old
(pre-4.1.1) protocol.
--server-arg=name Send embedded server this as a parameter.
--show-warnings Show warnings after every statement.
--plugin-dir=name Directory for client-side plugins.
--default-auth=name Default authentication client-side plugin to use.
Default options are read from the following files in the given order:
C:\Windows\my.ini C:\Windows\my.cnf C:\my.ini C:\my.cnf C:\wamp\bin\mysql\mysql5.5.24\my.ini C:\wamp\bin\mysql\mysql5.5.24\my.cnf
The following groups are read: mysql client
The following options may be given as the first argument:
--print-defaults Print the program argument list and exit.
--no-defaults Don't read default options from any option file.
--defaults-file=# Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.
Variables (--variable-name=value)
and boolean options {FALSE|TRUE} Value (after reading options)
--------------------------------- ----------------------------------------
auto-rehash FALSE
auto-vertical-output FALSE
character-sets-dir (No default value)
column-type-info FALSE
comments FALSE
compress FALSE
debug-check FALSE
debug-info FALSE
database (No default value)
default-character-set auto
delimiter ;
vertical FALSE
force FALSE
named-commands FALSE
ignore-spaces FALSE
init-command (No default value)
local-infile FALSE
no-beep FALSE
host (No default value)
html FALSE
xml FALSE
line-numbers TRUE
unbuffered FALSE
column-names TRUE
sigint-ignore FALSE
port 3306
prompt mysql>
quick FALSE
raw FALSE
reconnect FALSE
shared-memory-base-name (No default value)
socket /tmp/mysql.sock
ssl FALSE
ssl-ca (No default value)
ssl-capath (No default value)
ssl-cert (No default value)
ssl-cipher (No default value)
ssl-key (No default value)
ssl-verify-server-cert FALSE
table FALSE
user
safe-updates FALSE
i-am-a-dummy FALSE
connect-timeout 0
max-allowed-packet 16777216
net-buffer-length 16384
select-limit 1000
max-join-size 1000000
secure-auth FALSE
show-warnings FALSE
plugin-dir (No default value)
default-auth (No default value)
Error doing dump!
有人能发现问题出在哪里吗？我花了无数个小时试图找出问题所在。该命令在windows命令行上完美运行，但当我将它移动到Java代码时，它不起作用，这就是杀了我...... 我正在使用Windows 7和Java JDBC，如果这有帮助的话。
编辑：根据mrhobo的建议编码
public boolean restoreDatabase(String path, String mySqlPath) throws FileNotFoundException, IOException, InterruptedException
{
List<String> args = new ArrayList<>();
mySqlPath = "C:/wamp/bin/mysql/mysql5.5.24/bin/mysql.exe";
args.add(mySqlPath);
// Comands
args.add("-u");
args.add("root");
args.add("--password=123");
args.add("testingimport");
System.out.println("Args: "+args.toString());
try{
ProcessBuilder pb = new ProcessBuilder(args);
pb.redirectError();
Process p = pb.start();
path = "C:/Users/Kasper/Documents/testingimport.sql";
InputStream fileInputStream = new FileInputStream(new File(path));
byte[] b = new byte[4096];
while(fileInputStream.read(b) != -1) {
p.getOutputStream().write(b);
}
p.getOutputStream().close(); // don't forget to close!
InputStream is = p.getInputStream();
int in = -1;
while((in = is.read()) != -1)
{
System.out.print(""+(char) in);
}
int proccessCompleted = p.waitFor();
if(proccessCompleted == 0)
{
System.out.println("Dump done!");
return true;
}
else
{
System.out.println("Error doing dump!");
return false;
}
}
catch(IOException | InterruptedException ex)
{
System.out.println("Exception exportDB -> " + ex.getMessage() + "|" + ex.getLocalizedMessage());
}
return false;
}
这是输出：
Args: [C:/wamp/bin/mysql/mysql5.5.24/bin/mysql.exe, -u, root, --password=123, testingimport]
Error doing dump!
答案 0 :(得分：1)
此代码肯定不起作用的一个原因是：
args.add("<");
path = "C:/Users/Kasper/Documents/testingimport.sql";
args.add(path);
Windows命令行解释程序将<字符理解为一个特殊字符，表示需要将文件内容写入stdin。它不是流程启动的一部分，而是命令行解释器的一部分。以编程方式启动进程需要创建自己的输入，输出和错误流控制。这是操作系统的工作方式（参见win32 CreateProcess）。在Java中，进程通过进程的输出流获取其stdin。因此，为了使其工作，请删除上面的行，并在pb.start（）之后添加：
path = "C:/Users/Kasper/Documents/testingimport.sql";
InputStream fileInputStream = new FileInputStream(new File(path));
byte[] b = new byte[4096];
while(fileInputStream.read(b) != -1) {
p.getOutputStream().write(b);
}
process.getOutputStream().close(); // don't forget to close!