<repositories>
    <repository>
        <id>com.e-iceblue</id>
        <name>e-iceblue</name>
        <url>https://repo.e-iceblue.cn/repository/maven-public/</url>
    </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>e-iceblue</groupId>
        <artifactId>spire.pdf</artifactId>
        <version>11.8.3</version>
    </dependency>
</dependencies>

import com.spire.pdf.conversion.compression.PdfCompressor;

public class CompressContent {
    public static void main(String[] args){
        // 創(chuàng)建一個PdfCompressor實例
        PdfCompressor compressor = new PdfCompressor("示例.pdf");

        // 啟用文檔內(nèi)容壓縮
        compressor.getOptions().setCompressContents(true);

        // 壓縮并保存
        compressor.compressToFile("內(nèi)容壓縮.pdf");
    }
}

import com.spire.pdf.conversion.compression.ImageCompressionOptions;
import com.spire.pdf.conversion.compression.ImageQuality;
import com.spire.pdf.conversion.compression.PdfCompressor;

public class CompressImages {
    public static void main(String[] args){
        // 加載 PDF 文檔
        PdfCompressor compressor = new PdfCompressor("示例.pdf");

        // 獲取圖片壓縮選項
        ImageCompressionOptions imageCompression = compressor.getOptions().getImageCompressionOptions();

        // 壓縮圖片并設(shè)置質(zhì)量
        imageCompression.setCompressImage(true);          // 啟用圖片壓縮
        imageCompression.setImageQuality(ImageQuality.Low); // 設(shè)置圖片質(zhì)量（低、中、高）
        imageCompression.setResizeImages(true);           // 允許調(diào)整圖片大小以減少文件大小

        // 保存壓縮后的 PDF
        compressor.compressToFile("圖片壓縮.pdf");
    }
}

import com.spire.pdf.conversion.compression.PdfCompressor;
import com.spire.pdf.conversion.compression.TextCompressionOptions;

public class CompressFont {
    public static void main(String[] args){
        // 加載 PDF 文檔
        PdfCompressor compressor = new PdfCompressor("示例.pdf");

        // 獲取TextCompressionOptions對象
        TextCompressionOptions textCompression = compressor.getOptions().getTextCompressionOptions();

        // 啟用字體壓縮
        textCompression.setCompressFonts(true);

        // 可選：啟用取消嵌入字體
        // textCompression.setUnembedFonts(true);

        // 壓縮文檔并保存
        compressor.compressToFile("字體壓縮.pdf");
    }
}

import com.spire.pdf.conversion.compression.PdfCompressor;

public class CompressPDFByRemovingMetadata {
    public static void main(String[] args){
        // 加載 PDF 文檔
        PdfCompressor compressor = new PdfCompressor("示例.pdf");

        // 啟用元數(shù)據(jù)移除
        compressor.getOptions().setRemoveMetadata(true);

        // 壓縮文檔并保存
        compressor.compressToFile("移除元數(shù)據(jù).pdf");
    }
}