原创

Spring Boot集成easyposter快速入门Demo

1.什么是easyposter？

easyposter是一个简单的,便于扩展的绘制海报工具包

使用场景

在日常工作过程中，通常一些C端平台会伴随着海报生成与分享业务。因为随着移动互联网的迅猛发展，社交分享已成为我们日常生活的重要组成部分。海报分享作为一种直观、生动的分享方式，被广泛应用于各类应用场景中，如产品推广、活动宣传、内容分享等。本文主要介绍通过Java进行海报生成的原理解析与代码示例。

2.代码工程

实验目的

使用easyposter生成一张文章海报图

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)
   @ResponseBody
   public 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;
      }
   }
}

生成海报工具类

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();
   }


}