1.什么是easyposter？

easyposter是一個簡單的,便于擴展的繪制海報工具包

使用場景

在日常工作過程中，通常一些C端平臺會伴隨著海報生成與分享業務。因為隨著移動互聯網的迅猛發展，社交分享已成為我們日常生活的重要組成部分。海報分享作為一種直觀、生動的分享方式，被廣泛應用于各類應用場景中，如產品推廣、活動宣傳、內容分享等。本文主要介紹通過Java進行海報生成的原理解析與代碼示例。

2.代碼工程

實驗目的

使用easyposter生成一張文章海報圖

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>springboot-demo</artifactId><groupId>com.et</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>poster</artifactId><properties><maven.compiler.source>11</maven.compiler.source><maven.compiler.target>11</maven.compiler.target></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-autoconfigure</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>com.github.quaintclever</groupId><artifactId>easyposter</artifactId><version>1.2</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency></dependencies>
</project>

controller

package com.et.poster.controller;import com.et.poster.service.PosterUtil;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;@RestController
public class HelloWorldController {@RequestMapping("/hello")public Map<String, Object> showHelloWorld(){Map<String, Object> map = new HashMap<>();map.put("msg", "HelloWorld");return map;}@RequestMapping(path = "/genPoster",produces = MediaType.IMAGE_PNG_VALUE)@ResponseBodypublic byte[] genposterpng( HttpServletRequest request,HttpServletResponse response) {try {byte[] bytes = PosterUtil.test(); OutputStream out = null;try {out = response.getOutputStream();out.write(bytes);  out.flush();} catch (IOException ex) {ex.printStackTrace();}return null;} catch (Exception e) {e.printStackTrace();return null;}}
}

生成海報工具類

package com.et.poster.service;import com.quaint.poster.core.impl.PosterDefaultImpl;
import lombok.extern.slf4j.Slf4j;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.Random;/*** @author quaint* @date 21 February 2020* @since 1.0*/
@Slf4j
public class PosterUtil {public static String ossDomain="http://qdliuhaihua.oss-cn-qingdao-internal.aliyuncs.com/";public static void main(String[] args) throws Exception{//String in1pathString = PosterUtil.class.getResource("/static/css/fonts/simkai.ttf").getFile();//System.out.printf(in1pathString);test();}public   static  byte[] test() throws IOException, IllegalAccessException, FontFormatException {BufferedImage background = ImageIO.read(new URL("http://image.liuhaihua.cn/bg.jpg"));File file2=  new File("/Users/liuhaihua/Downloads/2.jpg");BufferedImage mainImage = ImageIO.read(file2);BufferedImage siteSlogon = ImageIO.read(new URL("http://image.liuhaihua.cn/site.jpg"));BufferedImage xx = ImageIO.read(new URL("http://image.liuhaihua.cn/xx.jpg"));File file5=  new File("/Users/liuhaihua/IdeaProjects/springboot-demo/poster/src/main/resources/image/wx_300px.png");BufferedImage qrcode = ImageIO.read(file5);SamplePoster poster = SamplePoster.builder().backgroundImage(background).postQrcode(qrcode).xuxian(xx).siteSlogon(siteSlogon).postTitle("Java generate poster in 5 miniutes").postDate("2022年11月14日 pm1:23 Author：Harries").posttitleDesc("Demand Background\u200B We often encounter such a demand in multi-terminal application development: when users browse products, they feel good and want to share them with friends. At this time, the terminal (Android, Apple, H5, etc.) generates a beautiful product poster and shares it with others through WeChat or other channels. You may also encounter the demand: make a personal business card and print it out or share it with others. The effect is probably like this: It may also be like this (the above pictures are all mine...").mainImage(mainImage).build();PosterDefaultImpl<SamplePoster> impl = new PosterDefaultImpl<>();BufferedImage test = impl.annotationDrawPoster(poster).draw(null);//ImageIO.write(test,"png",new FileOutputStream("/Users/liuhaihua/annTest.png"));ByteArrayOutputStream stream = new ByteArrayOutputStream();ImageIO.write(test, "png", stream);return stream.toByteArray();}}

以上只是一些關鍵代碼，所有代碼請參見下面代碼倉庫

代碼倉庫

• GitHub - Harries/springboot-demo: a simple springboot demo with some components for example: redis,solr,rockmq and so on.

3.測試

啟動Spring Boot應用程序

測試生成海報

訪問http://127.0.0.1:8088/genPoster，返回圖片如下圖

4.引用

• GitHub - quaintclever/easyposter: 一個簡單的,便于擴展的awt繪制海報小項目
• Spring Boot集成easyposter快速入門Demo | Harries Blog?