Google Archive Patch 基础应用代码记录

项目地址

Google Archive Patch

前置

<dependency>
    <groupId>com.google.archivepatchergroupId>
    <artifactId>archive-patch-applierartifactId>
    <version>1.0.4version>
    <scope>testscope>
dependency>

 <dependency>
    <groupId>com.google.archivepatchergroupId>
    <artifactId>archive-patch-generatorartifactId>
    <version>1.0.4version>
dependency>

<dependency>
    <groupId>com.google.archivepatchergroupId>
    <artifactId>archive-patch-sharedartifactId>
    <version>1.0.4version>
dependency>

生成补丁

import com.google.archivepatcher.generator.FileByFileV1DeltaGenerator;
import com.google.archivepatcher.shared.DefaultDeflateCompatibilityWindow;
import java.io.File;
import java.io.FileOutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;

/** Generate a patch; args are old file path, new file path, and patch file path. */
public class SamplePatchGenerator {
  public static void main(String... args) throws Exception {
    if (!new DefaultDeflateCompatibilityWindow().isCompatible()) {
      System.err.println("zlib not compatible on this system");
      System.exit(-1);
    }
    File oldFile = new File(args[0]); // must be a zip archive
    File newFile = new File(args[1]); // must be a zip archive
    Deflater compressor = new Deflater(9, true); // to compress the patch
    try (FileOutputStream patchOut = new FileOutputStream(args[2]); // args[2]为补丁存放地址
        DeflaterOutputStream compressedPatchOut =
            new DeflaterOutputStream(patchOut, compressor, 32768)) {
      new FileByFileV1DeltaGenerator().generateDelta(oldFile, newFile, compressedPatchOut);
      compressedPatchOut.finish();
      compressedPatchOut.flush();
    } finally {
      compressor.end();
    }
  }
}

应用补丁

import com.google.archivepatcher.applier.FileByFileV1DeltaApplier;
import com.google.archivepatcher.shared.DefaultDeflateCompatibilityWindow;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;

/** Apply a patch; args are old file path, patch file path, and new file path. */
public class SamplePatchApplier {
  public static void main(String... args) throws Exception {
    if (!new DefaultDeflateCompatibilityWindow().isCompatible()) {
      System.err.println("zlib not compatible on this system");
      System.exit(-1);
    }
    File oldFile = new File(args[0]); // must be a zip archive args[0]为旧版本文件地址
    Inflater uncompressor = new Inflater(true); // to uncompress the patch
    try (FileInputStream compressedPatchIn = new FileInputStream(args[1]); // args[1]补丁文件地址
        InflaterInputStream patchIn =
            new InflaterInputStream(compressedPatchIn, uncompressor, 32768);
        FileOutputStream newFileOut = new FileOutputStream(args[2])) { // args[2]合成文件地址
      new FileByFileV1DeltaApplier().applyDelta(oldFile, patchIn, newFileOut);
    } finally {
      uncompressor.end();
    }
  }
}