package com.ruoyi.system.service; import cn.hutool.core.img.Img; import cn.hutool.core.lang.UUID; import com.ruoyi.common.core.domain.PageQuery; import com.ruoyi.common.core.page.TableDataInfo; import com.ruoyi.system.domain.SysOss; import com.ruoyi.system.domain.bo.SysOssBo; import com.ruoyi.system.domain.vo.SysOssVo; import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletResponse; import java.awt.*; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.Calendar; import java.util.Collection; import java.util.List; /** * 文件上传 服务层 * * @author Lion Li */ public interface ISysOssService { String IMAGE_WEBP="webp"; TableDataInfo queryPageList(SysOssBo sysOss, PageQuery pageQuery); List listByIds(Collection ossIds); SysOssVo getById(Long ossId); SysOssVo upload(MultipartFile file); /** * * @param file * @param pre - 图片保存路径前缀 * @return */ SysOssVo upload(MultipartFile file,String pre); /** * 使用默认的最大高宽和水印保存图片 * @param file * @param pre - 图片保存路径前缀 * @return */ SysOssVo uploadImgs(MultipartFile file,String pre); /** * * @param file * @param pre - 图片保存路径前缀 * @param maxWidth - 缩放到指定的宽 小于1表示不缩放 * @param maxHeight - 缩放到指定的高 小于1表示不缩放 * @param watermark - 水印图片 null表示不加水印 * @return */ SysOssVo uploadImgs(MultipartFile file,String pre, int maxWidth, int maxHeight, BufferedImage watermark); void download(Long ossId, HttpServletResponse response) throws IOException; Boolean deleteWithValidByIds(Collection ids, Boolean isValid); default InputStream formatImage(MultipartFile file, int maxWidth, int maxHeight, BufferedImage watermark) { try { if (file == null || file.isEmpty()) { throw new RuntimeException("上传图片不能为空"); } if (!file.getContentType().startsWith("image/")) { throw new RuntimeException("上传的文件不是图片"); } return formatImage(file.getInputStream(), maxWidth, maxHeight, watermark); } catch (IOException e) { throw new RuntimeException("处理图片错误", e); } } default InputStream formatImage(Image img, int maxWidth, int maxHeight, BufferedImage watermark) { if (img == null) { throw new RuntimeException("图片不能为空"); } return formatImage(Img.from(img), maxWidth, maxHeight, watermark); } default InputStream formatImage(InputStream in, int maxWidth, int maxHeight, BufferedImage watermark) { return formatImage(Img.from(in), maxWidth, maxHeight, watermark); } default InputStream formatImage(Img img, int maxWidth, int maxHeight, BufferedImage watermark) { try { int w = img.getImg().getWidth(null); int h = img.getImg().getHeight(null); if(maxWidth>0 && maxHeight > 0){ if (w > maxWidth || h > maxHeight) { int outWidth = 0; int outHeight = 0; outHeight = maxWidth * h / w; if (outHeight > maxHeight) { outHeight = maxHeight; outWidth = outHeight * maxWidth / h; } else { outWidth = maxWidth; } img = img.scale(outWidth, outHeight); w = outWidth; h = outHeight; } } if (watermark != null) { int ww = watermark.getWidth(null); int wh = watermark.getHeight(null); if (w > ww && h > wh) { img = img.pressImage(watermark, 0, 0, 1f); } } ByteArrayOutputStream pout = new ByteArrayOutputStream(); img.setTargetImageType(IMAGE_WEBP).write(pout); ByteArrayInputStream pin = new ByteArrayInputStream(pout.toByteArray()); pout.close(); pout = null; return pin; } catch (Exception e) { throw new RuntimeException("处理图片错误", e); } } /** * 
     * - 根据存放规则和文件名生成存放的URI
     * - 支持
     * 	- {yyyy}/{MM}/{dd}/{HH}/{mm}/{ss} 年月日时分秒
     * 	- {UUID} 32位的唯一标志
     * 	- {id} int类型的唯一id,防止重复建议+年月日路径
     * 	- {id16} int类型的唯一id16进制表示,防止重复建议+年月日路径
     * 	- {id36} int类型的唯一id36进制表示,防止重复建议+年月日路径
     * 	- {filename} 文件基础名称
     * 	- {ext} 扩展名
     *
* * @param rule * @param filename * @return */ default String generateURI(String rule, String filename) { Calendar c = Calendar.getInstance(); if (rule.contains("{yyyy}")) { rule = rule.replace("{yyyy}", "" + c.get(Calendar.YEAR)); } if (rule.contains("{MM}")) { rule = rule.replace("{MM}", "" + (c.get(Calendar.MONTH) + 1)); } if (rule.contains("{dd}")) { rule = rule.replace("{dd}", "" + c.get(Calendar.DATE)); } if (rule.contains("{HH}")) { rule = rule.replace("{HH}", "" + c.get(Calendar.HOUR_OF_DAY)); } if (rule.contains("{mm}")) { rule = rule.replace("{mm}", "" + c.get(Calendar.MINUTE)); } if (rule.contains("{ss}")) { rule = rule.replace("{ss}", "" + c.get(Calendar.SECOND)); } if (rule.contains("{UUID}")) { rule = rule.replace("{UUID}", UUID.fastUUID().toString(true)); } if (rule.contains("{id}")) { rule = rule.replace("{id}", Integer.toString(id.nextId())); } if (rule.contains("{id16}")) { rule = rule.replace("{id16}", Integer.toString(id.nextId(), 16)); } if (rule.contains("{id36}")) { rule = rule.replace("{id36}", Integer.toString(id.nextId(), 36)); } if (rule.contains("{filename}")) { String temp = null; if (filename.contains(".")) { temp = filename.substring(0, filename.lastIndexOf(".")); } else { temp = filename; } rule = rule.replace("{filename}", temp); } if (rule.contains("{ext}")) { String temp = null; if (filename.contains(".")) { temp = filename.substring(filename.lastIndexOf(".") + 1); } else { temp = ""; } rule = rule.replace("{ext}", temp.toLowerCase()); } return rule; } Id id = new Id(); static class Id { private long lastTimestamp = 0; private int sequence = 0; public synchronized int nextId() { long timestamp = System.currentTimeMillis(); if (lastTimestamp == timestamp) { sequence = (sequence + 1) & 0xF; if (sequence == 0) { while (timestamp <= lastTimestamp) { timestamp = System.currentTimeMillis(); } } } else { sequence = 0; } lastTimestamp = timestamp; return (int) (timestamp & 0xFFFF) << 8 | sequence; } } }