作者: admin

  • IIS MIME MP4

    .mp4

    application/octet-stream

  • jquery easyui datagrid 全选、反选、清除

    //全选
    function allselectRow(tableName) {
        $('#' + tableName).datagrid('selectAll');
    }
    //反选
    function unselectRow(tableName) {
        var s_rows = $.map($('#' + tableName).datagrid('getSelections'),
                function(n) {
                    return $('#' + tableName).datagrid('getRowIndex', n);
                });
        $('#' + tableName).datagrid('selectAll');
        $.each(s_rows, function(i, n) {
            $('#' + tableName).datagrid('unselectRow', n);
        });
    }
    //全清
    function clearSelections(tableName) {
        $('#' + tableName).datagrid('clearSelections');
    }
    var grid = $('#tt1');
            var options = grid.datagrid('getPager').data("pagination").options;
            //当前页数
            var currentPage = options.pageNumber;
            //总条数
            var total = options.total;
            //当前页记录数
            var rows = options.pageSize;
            //总页数
            var max = Math.ceil(total / options.pageSize);
    
    
    //全选选择
    function checkAll() {
        $("input[name='menuid']").each(function() {
            $(this).attr("checked", true);
        });
    };
    //反向选择
    function reversal() {
        $("input[name='menuid']").each(function() {
            $(this).attr("checked", !this.checked);
        });
    }
    //取消选择
    function clearCheck() {
        $("input[name='menuid']").each(function() {
            $(this).attr("checked", false);
        });
  • PHP日志类

    新建Log.class.php,复制以下代码放入其中:

    <?php
    interface ILogHandler {
        public function write($msg);
    }
    
    // PHP日志类
    class CLogFileHandler implements ILogHandler {
        private $handle = null;
    
        public function __construct($file = '') {
            $this->handle = fopen($file, 'a');
        }
    
        public function write($msg) {
            fwrite($this->handle, $msg, 4096);
        }
    
        public function __destruct() {
            fclose($this->handle);
        }
    }
    class Log {
        private $handler = null;
        private $level = 15;
    
        private static $instance = null;
    
        private function __construct() {
        }
        private function __clone() {
        }
    
        public static function Init($handler = null, $level = 15) {
            if (!self::$instance instanceof self) {
                self::$instance = new self();
                self::$instance->__setHandle($handler);
                self::$instance->__setLevel($level);
            }
            return self::$instance;
        }
    
    
        private function __setHandle($handler) {
            $this->handler = $handler;
        }
    
        private function __setLevel($level) {
            $this->level = $level;
        }
    
        public static function DEBUG($msg) {
            self::$instance->write(1, $msg);
        }
    
        public static function WARN($msg) {
            self::$instance->write(4, $msg);
        }
    
        public static function ERROR($msg) {
            $debugInfo = debug_backtrace();
            $stack = "[";
            foreach ($debugInfo as $key => $val) {
                if (array_key_exists("file", $val)) {
                    $stack .= ",file:" . $val["file"];
                }
                if (array_key_exists("line", $val)) {
                    $stack .= ",line:" . $val["line"];
                }
                if (array_key_exists("function", $val)) {
                    $stack .= ",function:" . $val["function"];
                }
            }
            $stack .= "]";
            self::$instance->write(8, $stack . $msg);
        }
    
        public static function INFO($msg) {
            self::$instance->write(2, $msg);
        }
    
        private function getLevelStr($level) {
            switch ($level) {
                case 1:
                    return 'debug';
                    break;
                case 2:
                    return 'info';
                    break;
                case 4:
                    return 'warn';
                    break;
                case 8:
                    return 'error';
                    break;
                default:
            }
        }
    
        protected function write($level, $msg) {
            if (($level & $this->level) == $level) {
                $msg = '[' . date('Y-m-d H:i:s') . '][' . $this->getLevelStr($level) . '] ' . $msg . "\n";
                $this->handler->write($msg);
            }
        }
    }

    调用方式:

    <?php
    require 'Log.class.php'; // 导入日志类文件
    define('DS', DIRECTORY_SEPARATOR); // 设置目录分隔符
    define('LOG_PATH', dirname(__FILE__) . DS . 'log' . DS); // 日志文件目录
    
    $logHandler = new CLogFileHandler(LOG_PATH . date('Y-m-d') . '.log');
    $log = Log::Init($logHandler, 15);
    
    Log::DEBUG('111111');
  • 更新laravel框架

    composer update laravel/framework

  • centos 编译安装apache httpd

    wget http://mirror.bit.edu.cn/apache/httpd/httpd-2.4.39.tar.gz
    wget http://mirror.bit.edu.cn/apache/apr/apr-1.7.0.tar.gz
    wget http://mirror.bit.edu.cn/apache/apr/apr-util-1.6.1.tar.gz

    解压缩:

    tar -xvf httpd-2.4.39.tar.gz
    tar -xvf apr-1.7.0.tar.gz
    tar -xvf apr-util-1.6.1.tar.gz

    一点文件操作:

    mv apr-1.7.0 httpd-2.4.39/srclib/apr
    mv apr-util-1.6.1 httpd-2.4.39/srclib/apr-util
    cd httpd-2.4.39

    编译前安装 :

    yum -y install gcc make zlib-devel pcre-devel expat-devel
    
    mkdir /web
    
    mkdir /web/httpd
    
    mkdir  /web/php

    编译命令:

    ./configure --prefix=/web/httpd --with-included-apr --enable-nonportable-atomics=yes --with-z

    编译完成后:

    make
    
    make install
    
    service httpd start
  • ASP.NET CORE中的IOC注册类的三种方式

    AddSingleton():

    When we use the AddSingleton() method to register a service, then it will create a singleton service. It means a single instance of that service is created and that singleton instance is shared among all the components of the application that require it. That singleton service is created when we requested for the first time.

    AddScoped():

    Scoped means instance per request. When we use the AddScoped() method to register a service, then it will create a Scoped service. It means, an instance of the service is created once per each HTTP request and uses that instance in other calls of the same request.

    AddTransient():

    When we use the AddTransient() method to register a service, then it will create a Transient service. It means a new instance of the specified service is created each time when it is requested and they are never shared.

    Note: In the real-time applications, you need to register the components such as application-wide configuration as Singleton. The Database access classes like Entity Framework contexts are recommended to be registered as Scoped so that the connection can be re-used. If you want to run anything in parallel then it is better to register the component as Transient.


    Singleton:每次获取的时候,都是同一个实例,相当于静态类

    生命周期:项目启动——项目关闭

    AddSingleton可以直接用圆括号添加一个实例

    Transient: 每次从容器中获取的时候,都是一个新的实例

    生命周期:GC回收,主动释放

    Scoped: 对象在请求是才开始创建,在这次请求中获取的对象都是同一个

    生命周期:请求开始——请求结束

    scoped在同一次请求中,获取多次对象得到的是同一个对象

    对于同一个接口的多个实现或静态类,最后注册的实现可替换之前的

  • 安卓 andriod 4.2 html5 video标签loop属性不循环播放的问题

    给威海税务大厅调整试电视机顶盒APP时,APP里面是一个HTML5网页,遇到HMLT5无法循环播放视频的问题。经过上网查资料,发现andriod4.2确实会存在这个问题,解决的办法就是不用loop属性,使用Js来控制循环播放。
    代码如下:

    // 注意下面的代码是在jquery的 $(function(){    }); 里面执行的,也就是页面加载完成之后
    var videoDom = $('#video-player'); // 使用Jquery获取video标签
    var videofile = videoDom.attr('data');  // 获取video标签的data属性,这个data里面其实是要播放的文件
    var video = document.getElementById('video-player'); //使用js获取video标签
    video.addEventListener('ended', play); // 给video标签添加播放结束事件,事件函数是play()
    play();   // 调用一次play开始播放
    
    // 定义事件函数play
    function play() {
        video.src = videofile; // 设置要播放的视频文件
        video.load();  // 加载视频,若视频很短,加载完后再播放,监听canplaythrough事件即可  
        video.play();   // 开始播放            
    }   

    附上从网上找到的代码:

    <video autoplay="autoplay" id = "video" playsinline webkit-playsinline&gt;
       <source type="video/mp4" src="path" />
       <preference name="AllowInlineMediaPlayback" value="true" />
    </video>
    <script>
          var video = document.getElementById("video");
          video.loop = false;
          video.addEventListener('ended', function() {
          video.currentTime=0.1; video.play(); }, false);
          video.play();
      </script>

    关于webview不能自动播放的问题,我在app的代码里进行解决了,代码如下:

    // 在onCreate函数里调用
    /*加上下面四行代码,可以让WebView里的video标签自动播放,(android4.5下测试通过)*/
    int SDK_INT = android.os.Build.VERSION.SDK_INT;
    if (SDK_INT > 16) {
    	engine.getSettings().setMediaPlaybackRequiresUserGesture(false);  // 这段代码在模拟器上报错,要注释掉
    }

    根据查到的资料:
    webView加载HTML可能出现包括autopaly loop等属性都不能用的情况,可以考虑用更强大的CrossWalk代替,不过会增加包的大小

  • MySQL查询IP地址是否在某个区间

    SELECT * FROM table where  (INET_ATON("127.0.1.2") BETWEEN INET_ATON(ipstart) AND INET_ATON(ipend));

  • MySQL按关键字截取字符串substring_index

    SELECT  ip, SUBSTRING_INDEX(ip, '-', 1) AS ipstart,   SUBSTRING_INDEX(ip, '-', -1) AS ipend FROM orgip;

  • make: protoc: Command not found

    apt-get install protobuf-compiler