图片压缩java的工具 thumbnailator
一、maven
<?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"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>atlogging</artifactId> <version>0.0.1-SNAPSHOT</version> <name>atlogging</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!--图片压缩--> <dependency> <groupId>net.coobird</groupId> <artifactId>thumbnailator</artifactId> <version>0.4.8</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.35</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
二、控制器TestThumbnails.java
package com.example.atlogging.controller; import com.alibaba.fastjson.JSONObject; import net.coobird.thumbnailator.Thumbnails; import org.apache.commons.io.FilenameUtils; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletRequest; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.text.SimpleDateFormat; import java.util.Date; import java.util.UUID; @RestController @RequestMapping(path = "/thumb", produces = "application/json;charset=UTF-8") public class TestThumbnails { /** * @Description:保存图片并且生成缩略图 * @param imageFile 图片文件 * @param request 请求对象 * @param uploadPath 上传目录 * @return */ private static Logger log = LoggerFactory.getLogger(TestThumbnails.class); @RequestMapping("/up") public String testThumb(MultipartFile imageFile, HttpServletRequest request) { String res = this.uploadFileAndCreateThumbnail(imageFile, request, ""); return res; } public static String uploadFileAndCreateThumbnail(MultipartFile imageFile, HttpServletRequest request, String uploadPath) { JSONObject result = new JSONObject(); if (imageFile == null) { result.put("msg","imageFile不能为空"); return result.toJSONString(); } if (imageFile.getSize() >= 10 * 1024 * 1024) { result.put("msg","文件不能大于10M"); return result.toJSONString(); } String uuid = UUID.randomUUID().toString(); String fileDirectory = new SimpleDateFormat("yyyyMMdd").format(new Date());//设置日期格式 //拼接后台文件名称 String pathName = fileDirectory + File.separator + uuid + "." + FilenameUtils.getExtension(imageFile.getOriginalFilename()); //构建保存文件路径 //2016-5-6 yangkang 修改上传路径为服务器上 String realPath = "F:/temp/ys";//request.getServletContext().getRealPath("uploadPath"); //获取服务器绝对路径 linux 服务器地址 获取当前使用的配置文件配置 //String urlString=PropertiesUtil.getInstance().getSysPro("uploadPath"); //拼接文件路径 String filePathName = realPath + File.separator + pathName; log.info("图片上传路径：" + filePathName); //判断文件保存是否存在 File file = new File(filePathName); if (file.getParentFile() != null || !file.getParentFile().isDirectory()) { //创建文件 file.getParentFile().mkdirs(); } InputStream inputStream = null; FileOutputStream fileOutputStream = null; try { inputStream = imageFile.getInputStream(); fileOutputStream = new FileOutputStream(file); //写出文件 //2016-05-12 yangkang 改为增加缓存 // IOUtils.copy(inputStream, fileOutputStream); byte[] buffer = new byte[2048]; IOUtils.copyLarge(inputStream, fileOutputStream, buffer); buffer = null; } catch (IOException e) { filePathName = null; result.put("msg","操作失败"); return result.toJSONString(); } finally { try { if (inputStream != null) { inputStream.close(); } if (fileOutputStream != null) { fileOutputStream.flush(); fileOutputStream.close(); } } catch (IOException e) { filePathName = null; result.put("msg","操作失败"); return result.toJSONString(); } } // String fileId = FastDFSClient.uploadFile(file, filePathName); /** * 缩略图begin */ //拼接后台文件名称 String thumbnailPathName = fileDirectory + File.separator + uuid + "small." + FilenameUtils.getExtension(imageFile.getOriginalFilename()); //added by yangkang 2016-3-30 去掉后缀中包含的.png字符串 if (thumbnailPathName.contains(".png")) { thumbnailPathName = thumbnailPathName.replace(".png", ".jpg"); } long size = imageFile.getSize(); double scale = 1.0d; if (size >= 200 * 1024) { if (size > 0) { scale = (200 * 1024f) / size; } } //拼接文件路径 String thumbnailFilePathName = realPath + File.separator + thumbnailPathName; try { //added by chenshun 2016-3-22 注释掉之前长宽的方式，改用大小 // Thumbnails.of(filePathName).size(width, height).toFile(thumbnailFilePathName); if (size < 200 * 1024) { Thumbnails.of(filePathName).scale(1f).outputFormat("jpg").toFile(thumbnailFilePathName); } else { Thumbnails.of(filePathName).scale(1f).outputQuality(scale).outputFormat("jpg").toFile(thumbnailFilePathName); } } catch (Exception e1) { result.put("msg", "操作失败"); return result.toJSONString(); } /** * 缩略图end */ //原图地址 result.put("originalUrl", pathName); //缩略图地址 result.put("thumbnailUrl", thumbnailPathName); //缩略图地址 result.put("msg", "操作成功"); result.put("status", 200); return result.toJSONString(); } }