求一段正则提取代码解决思路

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php提交表单通过后,弹出的对话框怎样在当前页弹出php提交表单通过后,弹出的对话框怎样在当前页弹出而不是在空白页弹出?想实现这样的效果:而不是空白页弹出:------解决方案--------------------如果你的验证用PHP在后端,那么就用Ajax;仅供参考:HTML code

Linuxservice cannot use system environment variables. Detailed description: When doing a MySQL multi-instance installation before, the installation was successful and Linux could be started successfully; however, support-files/mysqld_multi.server was moved to the /etc/init.d/ directory and set to boot. Startup (chkconfigxxxon) failed; problem exploration found the problem and started to solve it. It was found that servicexxxstart could not start multiple instances of mysql, but mysqld_multistart could be used; then after various attempts, it was found that the /etc/profile settings could be printed out in a normal environment. m

Background: A TCP server was built to connect to smart devices, and then the key information such as positioning sent by the device in real time needs to be stored in the database. In order to consider the possibility of providing rest interface to the outside world in the future, the TCP server is integrated into the SpringBoot framework. Of course, it is also to use the mybatis framework to achieve data access as quickly as possible, and then solve various problems such as how to start and how to log out, and then in the TCP server When processing messages, you need to write to the database, directly call the DAO layer, and compile and report errors. Call the Service layer instead, compile normally, run to the calling place, report a null pointer exception, track the exception location, and find that the service is empty, that is, follow the previous controller layer pass

When calling the service business class directly in the multi-threaded run method, you should note that using the service business class in the Java multi-threaded run method will cause a java.lang.NullPointerException exception. This is because the business class injected by spring is null, or the business object is directly new. Also null. Multi-threading will prevent injection for thread safety, so when you want to use the service business class, you need to use the ApplicationContext method to obtain the bean method to obtain the service class. The class to obtain ApplicationContext must implement ApplicationCont

不用数据库来实现用户的简单的下载,代码如下,但是却不能下载,请高手找下原因,文件路劲什么的没问题。

图片消失如何解决先是图片文件上传$file=$_FILES['userfile']; if(is_uploaded_file($file['tmp_name'])){$query=mysql_query("INSERT INTO gdb_banner(image_src ) VALUES ('images/{$file['name'

图片消失如何解决先是图片文件上传$file=$_FILES['userfile']; if(is_uploaded_file($file['tmp_name'])){$query=mysql_query("INSERT INTO gdb_banner(image_src ) VALUES ('images/{$file['name'
