ImageIo处理图片（压缩和添加图片水印）

feihui8888

代码如下，喜欢的给点热心值哦！

[Java] 纯文本查看 复制代码

package com.tools.comparison.service.impl;

import java.awt.image.BufferedImage;
import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.Files;
import java.io.IOException;
import java.time.Duration;
import java.time.LocalDateTime;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.IIOImage;
import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
import javax.imageio.stream.FileImageOutputStream;
import javax.imageio.ImageWriteParam;
import java.awt.Graphics2D;

public class ImageCompressorImageIo {

    public static void main(String[] args) {
        String sourceFilePath = "C:\\*****\\1111.jpg";
        String compressedFilePath = "C:\\*****\\out1111--22222.jpg";
        String watermarkPath = "C:\\*****\\*****.png";

        /*File watermarkFile = new File(watermarkPath);
        BufferedImage watermarkImage = ImageIO.read(watermarkFile);*/

        //压缩质量（0.0 ~ 1.0）
        float quality = 0.5f;
        LocalDateTime beginBuildMapTime = LocalDateTime.now();
        compressImage(sourceFilePath, compressedFilePath, quality);
        LocalDateTime endBuildMapTime = LocalDateTime.now();
        long ss = Duration.between(beginBuildMapTime,endBuildMapTime).toMillis();
        System.out.println("ImageIo耗时:"+ ss+ "毫秒");
    }

    public static void compressImage(String sourceFilePath, String compressedFilePath, float quality) {
        BufferedImage originalImage = null;
        ImageWriter writer = null;
        FileImageOutputStream out = null;
        try {
            Path path = Paths.get(sourceFilePath);
            String fileType = Files.probeContentType(path);
            System.out.println("文件类型："+fileType);
            String fileName = path.getFileName().toString();
            String fileSuffix = fileName.substring(fileName.lastIndexOf(".") + 1);
            System.out.println("文件后缀："+fileSuffix);
            // 读取原始图片
            File sourceFile = new File(sourceFilePath);
            originalImage = ImageIO.read(sourceFile);

            // 创建压缩后的写入器
            // ImageIO.getImageWritersByFormatName()  JPEG、PNG、BMP   方法可以根据格式名称获取对应的 ImageWriter 对象
            writer = ImageIO.getImageWritersBySuffix(fileSuffix).next();
//            writer = ImageIO.getImageWritersByFormatName(fileSuffix).next();
            // 设置输出参数，控制压缩质量(只有JPEGImageWriteParam格式能控制压缩参数)
            ImageWriteParam writeParam = writer.getDefaultWriteParam();
            if (writeParam instanceof JPEGImageWriteParam) {
                // 如果是 JPEG 格式，设置压缩质量为 0.8
                writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
                writeParam.setCompressionQuality(quality);
            }
            // 创建压缩后的图片
            File compressedFile = new File(compressedFilePath);
            out = new FileImageOutputStream(compressedFile);
            writer.setOutput(out);
            // 创建用于写入的 IIOImage 对象
            IIOImage image = new IIOImage(originalImage, null, null);
            writer.write(null, image, writeParam);

        } catch (IOException e) {
            System.out.println("压缩图片失败：" + e.getMessage());
        } finally {
            // 释放资源
            if (originalImage != null) {
                originalImage.flush();
            }
            if (writer != null) {
                writer.dispose();
            }
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    System.out.println("关闭文件流失败：" + e.getMessage());
                }
            }
        }
    }
}

huaxincanmeng

好用，支持

我要这样子

在哪一步加的水印啊，没看出来