spring-boot图片压缩

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();
}
}

转载于:https://www.cnblogs.com/zhizou/p/11120858.html