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Let's write about how to use this passage. wkhtmltopdf Export HTML as PDF. I. Installation of fonts WORKDIR /tmp # Installation software RUN set -eux \ && apt-get update \ && apt-get install -y --no-install-recommends wget unzip fontconfig # Install Noto Sans SC font RUN wget https://fonts.google.com/download?family=No ...

Grep command 1. Examples of Basic Regular Expressions - Finding Specific Characters Here we will take the / etc/passwd file of all the local users as an example. Demo1 [root@localhost ~]# Grep-n "root"/etc/passwd//-n denotes the display line number 1:root:x:0:0:root:/root:/bin/bash 10:operator:x:11:0:operator:/root:/sbin/nologin 2. E ...

Command mode Definition: Encapsulate different requests into abstract commands and call real class implementations through command internals Advantage: (1) Decoupling the requester and the recipient. The requester only needs to issue relevant commands to call the recipient method internally. ( ...

Directory of Audio and Video Introduction Articles RGB-TO-BMP Review Convert RGB data into BMP images: Understanding BMP file format Preparing BMP header information Prepare BMP header BMP stores RG B in B-G-R order In the biHeight field of BitmapInfoHeader, biHeight is positive, bitmap is scanned from bottom to top, biHeight is negative, a ...

Because the springboot project needs to add the function of startup waiting, that is, when the project is loaded and started, it needs to pop up a customized screen on the desktop, under which there is a progress bar. 1. Add file JWindows.java in the same place as Application import com.CIDataCompare.a ...

Links to the original text: https://my.oschina.net/u/580135/blog/612244 Two mutex mechanisms: 1,synchronized 2,ReentrantLock ReentrantLock is a new feature of jdk5. ReentrantLoc ...

Some hot data may be visited thousands of times in a short time, so besides placing it in redis, it can also be placed in local memory, which is JVM's memory. We can use google's guava cache component to implement local caching. We chose guava because it can control the size and timeout of key s and value s, configure LRU policies, and guava i ...

The advantages of grpc are no longer described, but how to provide Restful interface to the outside world and how to use grpc-gateway to convert grpc to Restful API when there is no desire to develop the same function repeatedly. install go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway go get -u github.com/micro/protobuf ...

Given a word, you need to determine whether it is capitalized correctly. We define that the capitalization of a word is correct in the following cases: All letters are capitalized, such as "USA". All letters in a word are not capitalized, such as "leetcode". If the word contains ...

Let's start with an example. Client: package top.quartz.util; /** * description: //connect timeout Setting up connection timeout time; * //read timeout，Is the timeout for data transfer. * Both values must be set. If only one is set, either case will block. * Then the current application present ...