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生成缩略图；增大图片上传大小限制

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LeonardYoung
2021-10-29 21:32:24 +08:00
parent 74967faef3
commit d430360d38
9 changed files with 177 additions and 12 deletions
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8
ruoyi-system/src/main/java/com/ruoyi/system/service/IVisualImageService.java
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@ -1,6 +1,8 @@
package com.ruoyi.system.service;
import java.util.List;
import java.util.Map;
import com.ruoyi.system.domain.VisualImage;
import org.springframework.web.multipart.MultipartFile;
@ -64,5 +66,9 @@ public interface IVisualImageService
String saveImageToLocal(MultipartFile file);
int divideImage(VisualImage visualImage);
void divideImage(VisualImage visualImage);
void saveThumb(VisualImage visualImage);
Map<String,String> getLink(String fileName);
}

88
ruoyi-system/src/main/java/com/ruoyi/system/service/impl/VisualImageServiceImpl.java
View File

@ -3,13 +3,19 @@ package com.ruoyi.system.service.impl;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.uuid.UUID;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import com.ruoyi.system.mapper.VisualImageMapper;
import com.ruoyi.system.domain.VisualImage;
@ -135,7 +141,8 @@ public class VisualImageServiceImpl implements IVisualImageService {
}
@Override
public int divideImage(VisualImage visualImage) {
@Async
public void divideImage(VisualImage visualImage) {
String rootPath = RuoYiConfig.getProfile() + imageDir;
String newFileName = rootPath + "/" + visualImage.getNewName();
// 读入大图
@ -179,7 +186,7 @@ public class VisualImageServiceImpl implements IVisualImageService {
gr.dispose();
// 输出小图
String outFileName = outputDir + "/" + x + "_" + y + "." + split[split.length - 1];
String outFileName = outputDir + "/" + x + "_" + y + "." + split[split.length - 1];
ImageIO.write(imgs[count], split[split.length - 1], new File(outFileName));
count++;
}
@ -190,6 +197,81 @@ public class VisualImageServiceImpl implements IVisualImageService {
}
return 0;
}
@Value("${imageDir.width}")
private Integer thumbWidth;
@Value("${imageDir.height}")
private Integer thumbHeigth;
@Async
@Override
public void saveThumb(VisualImage visualImage) {
String rootPath = RuoYiConfig.getProfile() + imageDir;
String newFileName = rootPath + "/" + visualImage.getNewName();
// 读入大图
File file = new File(newFileName);
FileInputStream fis;
try {
fis = new FileInputStream(file);
BufferedImage image = ImageIO.read(fis);
// 新建文件夹存放子图
String[] split = visualImage.getNewName().split("\\.");
String outputDir = rootPath + "/" + split[0];
File targetFile = new File(outputDir);
if (!targetFile.exists()) {
targetFile.mkdirs();
}
//设置小图的大小和类型
BufferedImage imgs = new BufferedImage(thumbWidth, thumbHeigth, image.getType());
//写入图像内容
Graphics2D gr = imgs.createGraphics();
gr.drawImage(image, 0, 0, thumbWidth, thumbHeigth, null);
gr.dispose();
// 输出小图
String outFileName = outputDir +"/thumb."+ split[split.length - 1];
ImageIO.write(imgs, split[split.length - 1], new File(outFileName));
} catch (Exception e) {
e.printStackTrace();
}
}
@Value("${server.port}")
private int serverPort;
@Value("${imageDir.visualImage}")
private String imagePrefix;
public String getUrl() {
InetAddress address = null;
try {
address = InetAddress.getLocalHost();
} catch ( UnknownHostException e) {
e.printStackTrace();
}
return "http://"+address.getHostAddress() +":"+this.serverPort;
}
@Override
public Map<String, String> getLink(String fileName) {
// todo 这里应该查找数据库或本地资源，判断图片是否存在
HashMap<String, String> map = new HashMap<>();
String[] split = fileName.split("\\.");
if (split.length != 2) {
return null;
}
String rootDir = this.getUrl() + Constants.RESOURCE_PREFIX +imagePrefix +"/";
map.put("subRoot",rootDir + split[0] + "/");
map.put("original",rootDir+fileName);
map.put("thumb",rootDir+"thumb."+ split[1]);
return map;
}
}