小编Suh*_*pta的帖子

我创建了一个我的软件的.exe文件(这是一个Java swing应用程序).但.exe文件仅在安装了JVM的计算机上运行.我想在没有安装JVM的计算机上运行它.我该如何做到这一点？

是否可以使用c ++代码将.class文件转换为.jar文件？

(即我们可以用c ++编写一个代码,在执行时将给定的.class文件转换为.jar文件)

如果是的话,我该怎么做？

以下脚本使用mail函数发送电子邮件.但是我无法发送电子邮件.点击submit此按钮会显示:

Warning: mail() [function.mail]: SMTP server response: 553 We do not relay non-local mail, sorry. in E:\xampp\htdocs\feedback.php on line 19
mail sent successfully

脚本

<?php 
if( isset( $_REQUEST['email'] ) ) {
    $email = $_REQUEST['email'];
    $subject = $_REQUEST['subject'];
    $message = $_REQUEST['message'];
    mail("me@gmail.com" , $subject , $message , "From:".$email );
    echo "mail sent successfully";
}  else {
     echo "<form method = 'post' action = 'feedback.php'>
     Email of sender : <input name = 'email' type = 'text' /> <br/> …

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;


public class displayFullScreen extends JFrame {
        private JLabel alarmMessage = new JLabel("Alarm !");
        private JPanel panel = new JPanel();
        public displayFullScreen() {
            setUndecorated(true);
            panel.setLayout(new FlowLayout(FlowLayout.CENTER));
            alarmMessage.setText("Alarm !");
            alarmMessage.setFont(new Font("Cambria",Font.BOLD,100));
            alarmMessage.setForeground(Color.CYAN);
            panel.add(alarmMessage);
            Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
            setBounds(0,0,screenSize.width,screenSize.height);
            panel.setBackground(Color.black);
            add(panel);

            addKeyListener(new KeyAdapter() {
               public void keyPressed(KeyEvent ke) {  // handler
        if(ke.getKeyCode() == ke.VK_ESCAPE) {
                       System.out.println("escaped ?");
                       setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); // trying to close
                    } else {
                       System.out.println("not escaped");
                     }
              } 
           });
        }          

        public static void main(String args[]) { …

与C++/C相比,某些键(如shift,[,],Del等)的虚拟键代码在java中显示为不同的值.例如 :

Key     Java       C / C++
Shift   16         160
[       91         219
]       93         221
\       92         220
Del     127        46
Window  524        91

这是什么原因？这些代码是虚拟代码还是不同类型？对于包括字母,数字,功能键(F1-F12),退格键,`等的键是相同的.

我可能误解了一个概念,在这种情况下请澄清一下.

签入C/C++

KBDLLHOOKSTRUCT * kbhook = (KBDLLHOOKSTRUCT *) lParam;
printf("%u\n",kbhook->vkCode);

用Java检查

private void jTextField1KeyPressed(java.awt.event.KeyEvent evt) {                                       
    int code = evt.getKeyCode();
    // code isEqualTo KeyEvent.VK_DELETE : NOTE

}

参考:KeyEvent类

我刚刚为fedora安装了emacs.我想emacs用来写ruby.有哪些工具,扩展需要为我提供代码提示,ruby的代码完成类型功能？

我无法在Tomcat中查看服务器状态和Manager App页面.

虽然我在其中配置了用户名和密码tomcat-users.xml,但它不接受该组合并显示以下消息:

401 Unauthorized

You are not authorized to view this page. If you have not changed any configuration  files, please examine the file conf/tomcat-users.xml in your installation. That file must contain the credentials to let you use this webapp.

For example, to add the manager-gui role to a user named tomcat with a password of s3cret, add the following to the config file listed above.

<role rolename="manager-gui"/>
<user username="tomcat" password="s3cret" roles="manager-gui"/>

Note that for Tomcat 7 …

我无法更改默认后重新启动服务器datadir从C:/ProgramData/MySQL/MySQL Server 5.7\Data到D:/Data.

• 我换datadir了datadir="D:/Data"
• 然后我停了下来 mysql
• 将Data目录复制到D:/
• 试图重启服务器
• 无法开始

可能是什么原因呢？

错误快照:

但是,如果恢复原始datadir路径,它可以正常工作.

以下代码成功创建了一个实例。

try {
        $ec2 = new Ec2Client($options);
        $result = $ec2->runInstances([
             'ImageId' => 'ami-xxxxxxxx', // REQUIRED
             'InstanceInitiatedShutdownBehavior' => 'stop',
             'InstanceType' => 't1.micro',
             'MaxCount' => 1, // REQUIRED
             'MinCount' => 1, // REQUIRED,
             'EbsOptimized' => false, // SEE COMMENT
             'KeyName' => 'TestCloud',
             'Monitoring' => [
                'Enabled' => true // REQUIRED
              ]
        ]);
    }catch(Exception $exc) {
        var_dump($exc);
    }

但是，当我尝试从 检索连接 (RDP) 到该实例的密码时aws console，出现以下错误：

Password is not available.
This instance was launched from a custom AMI, or the default password has changed. …

我有一个exports file包含所有续集模型的模型，然后定义模型之间的关系。它看起来像：

// Snippet from the global init file

for (let modelFile of modelFileList) {
            // ... Some code ...

            // Require the file
            appliedModels[modelName] = require(`../${MODEL_DIR}/${modelFile}`).call(null, _mysql);
 }

 //Define the relationship between the sql models
 _defineRelationship(appliedModels);


function _defineRelationship(models) {
     models._planAllocationModel.belongsTo(models._subscriptionModel, {
            foreignKey: 'subscription_id',
            targetKey: 'subscription_id'
        });
}

但是当我尝试包含这样的模型时：

 _subscriptionModel.findAll({
                where: {
                    start_date: {
                        _lte: today // Get all subscriptions where start_date <= today
                    }
                },
                limit,
                include: [
                    {
                        model: _planAllocationModel
                    }
                ]
            });

续集抛出错误：SequelizeEagerLoadingError: tbl_plan_allocation …