今天上午打印回单功能发布到测试环境,报了: class java.awt.HeadlessException : No X11 DISPLAY variable was set, but this program performed an operation which requires it. 异常,经查询发现网上解决方案不少,其中解决办法大致如下: export DISPLAY=:0.0 上面配置环境变量DIAPLAY,值为:0.0就解决了当前问题. 在这里要介绍下另一种方式 export…
安装oracle数据时需要用到图形界面安装,当我们用root用户登录后切换到oracle用户时运行./runInstaller提示报错: Can't connect to X11 window server using ':1.0' as the value of the DISPLAY variable. 这是因为没有赋予oracle运行图形界面的权限,这时只要在root下运行xhost + 然后回车即可解决问题.[root@oracle ~]# xhost +access control d…
刚刚在一台Linux服务器上安装了jdk和Tomcat,然后部署了一个web项目,在项目中有个添加图片的功能,保存图片时报错 org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageIO 和 org.…
Linux启动应用(比如jmeter)报An error occurred: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. 解决方案: 其实很简单,你应用部署在哪个用户下,那么你登录图形化界面的用户必须与其相同 如果你部署应用在 *** 用户下面,但是你登录的图形化界面用户是root用户,然后你 su - *** 切换到该用户下是没有用的 必须退出该root用户,…
问题描述: 在Linux + oracle 安装时,采有root 帐号登录x-windows 界面,然后 $su oracle 登录录安装Oracle 报以下错误: >>> Could not execute auto check for display colors using command /usr/bin/xdpyinfo. Check if the DISPLAY variable is set.Some requirement checks failed. You must…
How To Display Variable Value In View? There are several ways. For example simply using @ like this: <td> @y </td> Or by using a <span> tag like this: <span>Your Text @(y) ...</span> Or using Html.Label helper: @Html.Label(&q…
val = 9 def test(flag): if flag: val = 1 else: print("test") return val if __name__ == '__main__': ret = test(0) print(ret) 运行如下: linux@linux-desktop:~$ python3.3 test.py fuckTraceback (most recent call last): File "test.py", line 10,…
报错: SyntaxError: Non-ASCII character 概意思是,默认文件是ASCII格式,需要更改文件编码,操作是在文件首行加上 #!/usr/bin/python # -*- coding:utf8 -*- 报错 :TypeError: unicode argument expected, got 'str' if your environment is Python2.7, you can change code :import ioandoutput_stream·=i…
Machine and Deep Learning with Python Education Tutorials and courses Supervised learning superstitions cheat sheet Introduction to Deep Learning with Python How to implement a neural network How to build and run your first deep learning network Neur…
一.The way of the program problem solving: The process of formulating a problem, finding a solution, and expressing the solution. high-level language: A programming language like Python that is designed to be easy for humans to read and write. low-leve…