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niumooniumoo
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springboot-banner 自定义banner
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‎springboot-banner/.gitignore

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HELP.md
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/target/
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!.mvn/wrapper/maven-wrapper.jar
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### IntelliJ IDEA ###
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.idea
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*.iws
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*.iml
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*.ipr
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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/build/

‎springboot-banner/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.1.3.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>net.codingme</groupId>
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<artifactId>banner</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>banner</name>
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<description>banner</description>
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<properties>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎springboot-banner/src/main/java/net/codingme/banner/BannerApplication.java

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package net.codingme.banner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class BannerApplication {
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public static void main(String[] args) {
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SpringApplication.run(BannerApplication.class, args);
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}
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}

‎springboot-banner/src/main/java/net/codingme/banner/util/GeneratorTextImage.java

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package net.codingme.banner.util;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import javax.imageio.ImageIO;
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/**
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* <p>
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* 根据图片生成字符图案
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* 1.图片大小缩放
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* 2.遍历图片像素点
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* 3.获取图片像素点亮度
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* 4.匹配字符
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* 5.输出图案
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*
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* @author niujinpeng
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* @website www.codingme.net
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* @date 2019-02-25 23:03:01
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*/
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public class GeneratorTextImage {
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private static final char[] PIXEL = {'@', '#', '8', '&', 'o', ':', '*', '.', ' '};
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public static void main(String[] args) throws Exception {
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// 图片缩放
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BufferedImage bufferedImage = makeSmallImage("src/main/resources/banner.jpg");
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// 输出
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printImage(bufferedImage);
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}
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public static void printImage(BufferedImage image) throws IOException {
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int width = image.getWidth();
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int height = image.getHeight();
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for (int i = 0; i < height; i++) {
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for (int j = 0; j < width; j++) {
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int rgb = image.getRGB(j, i);
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Color color = new Color(rgb);
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int red = color.getRed();
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int green = color.getGreen();
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int blue = color.getBlue();
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// 一个用于计算RGB像素点亮度的公式
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Double luminace = 0.2126 * red + 0.7152 * green + 0.0722 * blue;
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double index = luminace / (Math.ceil(255 / PIXEL.length) + 0.5);
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System.out.print(PIXEL[(int)(Math.floor(index))]);
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}
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System.out.println();
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}
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}
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public static BufferedImage makeSmallImage(String srcImageName) throws Exception {
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File srcImageFile = new File(srcImageName);
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if (srcImageFile == null) {
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System.out.println("文件不存在");
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return null;
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}
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FileOutputStream fileOutputStream = null;
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BufferedImage tagImage = null;
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Image srcImage = null;
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try {
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srcImage = ImageIO.read(srcImageFile);
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int srcWidth = srcImage.getWidth(null);// 原图片宽度
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int srcHeight = srcImage.getHeight(null);// 原图片高度
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int dstMaxSize = 90;// 目标缩略图的最大宽度/高度，宽度与高度将按比例缩写
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int dstWidth = srcWidth;// 缩略图宽度
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int dstHeight = srcHeight;// 缩略图高度
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float scale = 0;
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// 计算缩略图的宽和高
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if (srcWidth > dstMaxSize) {
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dstWidth = dstMaxSize;
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scale = (float)srcWidth / (float)dstMaxSize;
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dstHeight = Math.round((float)srcHeight / scale);
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}
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srcHeight = dstHeight;
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if (srcHeight > dstMaxSize) {
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dstHeight = dstMaxSize;
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scale = (float)srcHeight / (float)dstMaxSize;
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dstWidth = Math.round((float)dstWidth / scale);
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}
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// 生成缩略图
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tagImage = new BufferedImage(dstWidth, dstHeight, BufferedImage.TYPE_INT_RGB);
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tagImage.getGraphics().drawImage(srcImage, 0, 0, dstWidth, dstHeight, null);
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return tagImage;
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} finally {
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if (fileOutputStream != null) {
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try {
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fileOutputStream.close();
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} catch (Exception e) {
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}
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fileOutputStream = null;
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}
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tagImage = null;
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srcImage = null;
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System.gc();
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}
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}
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}

‎springboot-banner/src/main/resources/application.properties

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‎springboot-banner/src/main/resources/banner.jpg

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‎springboot-banner/src/main/resources/banner.txt

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(_)
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_ __ _ _ _ _ __ ___ ___ ___
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| '_ \| | | | | '_ ` _ \ / _ \ / _ \
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| | | | | |_| | | | | | | (_) | (_) |
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|_| |_|_|\__,_|_| |_| |_|\___/ \___/ 版本：${spring-boot.formatted-version}

‎springboot-banner/src/test/java/net/codingme/banner/BannerApplicationTests.java

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package net.codingme.banner;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class BannerApplicationTests {
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@Test
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public void contextLoads() {}
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}

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