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背景：由于项目需要，需要将apk包加入服务端返回的静态资源文件到apk中，形成离线apk包供下载安装。经过调查研究，决定使用apktool实现。关于apktool的资料可以参考

https://blog.csdn.net/quantum7/article/details/124060620

https://blog.csdn.net/qq_20451879/article/details/117300056

windows版环境

1.JDK环境

2.下载apktool.jar

打包流程：

apktool下载地址：https://ibotpeaches.github.io/Apktool/
3.解压apk包
java -jar apktool_2.6.1.jar d app-release.apk
4删除签名文件
签名文件在解压文件后的\original\META-INF目录下
C:\Users***\Downloads\app-release1111\original\META-INF

5.添加要替换的文件到
C:\Users***\Downloads\app-release\assets\assets下

6.生成签名文件

.keystore 签名方式：

keytool -genkey -alias test.keystore -keyalg RSA -validity 20000 -keystore test.keystore

.jks方式：

keytool -genkey -v -keystore test.jks -alias test-keyalg RSA -keysize 2048 -validity 20000

keytool -importkeystore -srckeystore test.jks -destkeystore test.jks -deststoretype pkcs12

7.重新打包
java -jar apktool_2.6.1.jar b app-release

8.使用重新打包后的apk和签名文件打包

.keystore重新签名打包方式：

jarsigner -verbose -keystore test.keystore -signedjar app-release-1-0224.apk app-release-1.apk test.keystore

.jks重新签名打包方式：

jarsigner -verbose -keystore test.jks -signedjar 222.apk test.apk test

java环境

构建脚本

bulidApk.bat

@echo off
start cmd /k "cd C:\Users\aipingh\Downloads && java -jar C:\Users\aipingh\Downloads\apktool.jar b C:\Users\***\Downloads\app-release8"

rebuildKeystoreApk.bat

@echo off
start cmd /k "cd C:\Users\aipingh\Downloads && jarsigner -verbose -keystore tinnove.keystore -storepass 123456 -signedjar C:\Users\***\Downloads\app-release8\dist\app-release.apk C:\Users\aipingh\Downloads\app-release8\dist\app-release8.apk test.keystore"

代码：

import ch.qos.logback.core.util.FileUtil;
import cn.hutool.core.io.FileUtil;import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;public class ApkUtil {private String outPth;// windows版下载public void downloadWindowsOfflineApk(InfoReqVO reqVO, HttpServletResponse response) {try {//  apk解压包路径String apkOriginalPath = "C:\\Users\\***\\Downloads\\app-release8\\";// 下载离线js文件到目标apk的资源文件路径中String fullPath = apkOriginalPath + "original\\META-INF\\";downloadJsFile(reqVO);//删除签名文件File mkdir = FileUtil.mkdir(fullPath);//去掉签名FileUtils.deleteTempFiles(mkdir, fullPath);//重新打包try {String commandStr = "cmd /c C:\\Users\\***\\Downloads\\buildApk.bat";Runtime.getRuntime().exec(commandStr);} catch (IOException e) {}// 下载签名文件到dist目录中String packagePath = "dist";File packagePathFile = FileUtil.mkdir(apkOriginalPath + packagePath);String keystorePath = "https://***/apk/keystore/tinnove.keystore";ImageInfo appDesignDetailImageInfo = new ImageInfo();appDesignDetailImageInfo.setFilename("tinnove.keystore");appDesignDetailImageInfo.setPathUrl(keystorePath);downloadFile(packagePathFile, appDesignDetailImageInfo);// 加签名后打包APKtry {String commandStr = "cmd /c C:\\Users\\***\\Downloads\\rebuildKeystoreApk.bat";Runtime.getRuntime().exec(commandStr).waitFor(30, TimeUnit.MILLISECONDS);} catch (IOException e) {} catch (InterruptedException e) {e.printStackTrace();}// 重新构建后的apk文件地址String newApkName = "app-release.apk";String newApkPath = apkOriginalPath + "dist\\" + newApkName;// 将apk包返回给前端File file = new File(newApkPath);response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("app-release.apk", "UTF-8"));//获取文件的输入流InputStream fis = new FileInputStream(file);byte[] buffer = new byte[1024 * 5];int r;while ((r = fis.read(buffer)) != -1) {response.getOutputStream().write(buffer, 0, r);}// 删除build目录，方便下次打包FileUtils.deleteTempFiles(null, apkOriginalPath + "build");// 删除dist及目录下的apk包FileUtils.deleteTempFiles(null, apkOriginalPath + "dist");} catch (IOException e) {}}//liunx版下载public void apkShellDownload(InfoReqVO reqVO, HttpServletResponse response) {try {//下载原始apkFile designOfflineFile = cn.hutool.core.io.FileUtil.mkdir(outPth);String designOfflineApkPath = "https://***/apk/offline/app-release.apk";ImageInfo detailImageInfo = new ImageInfo();detailImageInfo.setFilename("app-release.apk");detailImageInfo.setPathUrl(designOfflineApkPath);downloadFile(designOfflineFile, detailImageInfo);//下载apktool.jar工具包String apktoolPath = "https://***/apk/offline/apktool.jar";ImageInfo imageInfo = new ImageInfo();imageInfo.setFilename("apktool.jar");imageInfo.setPathUrl(apktoolPath);downloadFile(designOfflineFile, imageInfo);//解压原始apkFileUtils.execSh("cd  " + outPth + " && " + "java -jar " + outPth + " apktool.jar  d  " + outPth + "app-release.apk");//  apk解压包路径String apkOriginalPath = outPth + "app-release/";// 下载离线js文件到目标apk的资源文件路径中String fullPath = apkOriginalPath + "original/META-INF/";downloadJsFile(reqVO);//删除签名文件 去掉签名cn.hutool.core.io.FileUtil.clean(fullPath);//重新打包FileUtils.execSh("cd " + outPth + " && " + " java -jar" + outPth + "apktool.jar b  " + outPth + "app-release", 5, TimeUnit.MILLISECONDS);// 下载签名文件到dist目录中String packagePath = "dist/";File packagePathFile = cn.hutool.core.io.FileUtil.mkdir(apkOriginalPath + packagePath);String keystorePath = "https://***/apk/keystore/test.keystore";ImageInfo appDesignDetailImageInfo = new ImageInfo();appDesignDetailImageInfo.setFilename("test.keystore");appDesignDetailImageInfo.setPathUrl(keystorePath);downloadFile(packagePathFile, appDesignDetailImageInfo);// 加签名后打包APKFileUtils.execSh("cd  " + outPth + " &&  " + "jarsigner -verbose -keystore test.keystore -storepass 123456 -signedjar  "+ apkOriginalPath + packagePath + "app-release-offline.apk   " + apkOriginalPath + packagePath + "app-release.apk test.keystore", 5, TimeUnit.MILLISECONDS);//            List<File> fileList = cn.hutool.core.io.FileUtil.loopFiles(outPth);// 重新构建后的apk文件地址String newApkName = "app-release-offline.apk";String newApkPath = apkOriginalPath + packagePath;// 将apk包返回给前端File file = cn.hutool.core.io.FileUtil.file(newApkPath, newApkName);if (file.exists()) {response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode("app-release.apk", "UTF-8"));//获取文件的输入流InputStream fis = new FileInputStream(file);byte[] buffer = new byte[1024 * 5];int r;while ((r = fis.read(buffer)) != -1) {response.getOutputStream().write(buffer, 0, r);}}// 删除build目录，方便下次打包cn.hutool.core.io.FileUtil.clean(apkOriginalPath + "build");// 删除dist及目录下的apk包cn.hutool.core.io.FileUtil.clean(apkOriginalPath + "dist");} catch (IOException e) {}}private void downloadFile(File target, ImageInfo detailImageInfo) throws IOException {File file = org.apache.commons.io.FileUtils.getFile(target, detailImageInfo.getFilename());FileOutputStream outputStream = new FileOutputStream(file);//获取文件的网络输入流byte[] bytes = cn.hutool.http.HttpUtil.downloadBytes(detailImageInfo.getPathUrl());InputStream fis = new ByteArrayInputStream(bytes);byte[] buffer = new byte[1024 * 5];int r;while ((r = fis.read(buffer)) != -1) {outputStream.write(buffer, 0, r);}fis.close();outputStream.close();}private void downloadJsFile(InfoReqVO reqVO) {try {//apk包所在的服务器路径String fullPath = outPth + "/app-release/" + "/assets/app-data/";//本地路径
//            String fullPath = "C:\\Users\\xxx\\Downloads\\app-release\\assets\\app-data";
//        String fullPath = designOfflinePath + "/" + reqVO.getDesignId() + "/" + reqVO.getCount() + "/";File target = cn.hutool.core.io.FileUtil.mkdir(new File(fullPath));
//            File target = new File(fullPath + "preview");
//
//            // 返回图片文件夹List<ImageInfo> designDetailImages = new ArrayList<>();downloadFiles(designDetailImages, target);// 返回逻辑连线 json文件List<Object> designLogicWiring = new ArrayList<>();String logicWiringListJs = "let  logicWiringList  = " + cn.hutool.json.JSONUtil.toJsonStr(designLogicWiring);FileUtils.object2JsonFile(fullPath + "logicWiring.js", logicWiringListJs);// 返回图片url json文件
//            List<AppDesignDetailImageInfo> designDetailImageUrls = getImagesInfo(reqVO);
//            String previewJs = "let  previewImageUrls = " + JSONUtil.toJsonStr(designDetailImageUrls);
//            FileUtils.object2JsonFile(fullPath + "preview.js", previewJs);// 返回分组 json文件List<Object> groupList = new ArrayList<>();String groupListJs = "let  groupList = " + cn.hutool.json.JSONUtil.toJsonStr(groupList);FileUtils.object2JsonFile(fullPath + "group.js", groupListJs);} catch (Exception e) {}}private void downloadFiles(List<ImageInfo> designDetailImages, File target) {try {//将输出流转换成Zip输出流for (ImageInfo detailImageInfo : designDetailImages) {downloadFile(target, detailImageInfo);}} catch (IOException e) {}}}

import cn.hutool.core.util.ObjectUtil;
import cn.hutool.json.JSONUtil;
import com.google.gson.Gson;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.http.MediaType;
import org.springframework.util.MimeTypeUtils;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.StringJoiner;
import java.util.concurrent.TimeUnit;/*** 文件处理工具类** @author*/
@Slf4j
public class FileUtils {/*** 字符常量：斜杠 {@code '/'}*/public static final char SLASH = '/';/*** 字符常量：反斜杠 {@code '\\'}*/public static final char BACKSLASH = '\\';public static String FILENAME_PATTERN = "[a-zA-Z0-9_\\-\\|\\.\\u4e00-\\u9fa5]+";/*** 输出指定文件的byte数组** @param filePath 文件路径* @param os       输出流* @return*/public static void writeBytes(String filePath, OutputStream os) throws IOException {FileInputStream fis = null;try {File file = new File(filePath);if (!file.exists()) {throw new FileNotFoundException(filePath);}fis = new FileInputStream(file);byte[] b = new byte[1024];int length;while ((length = fis.read(b)) > 0) {os.write(b, 0, length);}} catch (IOException e) {throw e;} finally {if (os != null) {try {os.close();} catch (IOException e1) {e1.printStackTrace();}}if (fis != null) {try {fis.close();} catch (IOException e1) {e1.printStackTrace();}}}}/*** 删除文件** @param filePath 文件* @return*/public static boolean deleteFile(String filePath) {boolean flag = false;File file = new File(filePath);// 路径为文件且不为空则进行删除if (file.isFile() && file.exists()) {file.delete();flag = true;}return flag;}/*** 文件名称验证** @param filename 文件名称* @return true 正常 false 非法*/public static boolean isValidFilename(String filename) {return filename.matches(FILENAME_PATTERN);}/*** 检查文件是否可下载** @param resource 需要下载的文件* @return true 正常 false 非法*/public static boolean checkAllowDownload(String resource) {// 禁止目录上跳级别if (StringUtils.contains(resource, "..")) {return false;}// 检查允许下载的文件规则if (ArrayUtils.contains(MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION, FileTypeUtils.getFileType(resource))) {return true;}// 不在允许下载的文件规则return false;}/*** 下载文件名重新编码** @param request  请求对象* @param fileName 文件名* @return 编码后的文件名*/public static String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException {final String agent = request.getHeader("USER-AGENT");String filename = fileName;if (agent.contains("MSIE")) {// IE浏览器filename = URLEncoder.encode(filename, "utf-8");filename = filename.replace("+", " ");} else if (agent.contains("Firefox")) {// 火狐浏览器filename = new String(fileName.getBytes(), "ISO8859-1");} else if (agent.contains("Chrome")) {// google浏览器filename = URLEncoder.encode(filename, "utf-8");} else {// 其它浏览器filename = URLEncoder.encode(filename, "utf-8");}return filename;}/*** 返回文件名** @param filePath 文件* @return 文件名*/public static String getName(String filePath) {if (null == filePath) {return null;}int len = filePath.length();if (0 == len) {return filePath;}if (isFileSeparator(filePath.charAt(len - 1))) {// 以分隔符结尾的去掉结尾分隔符len--;}int begin = 0;char c;for (int i = len - 1; i > -1; i--) {c = filePath.charAt(i);if (isFileSeparator(c)) {// 查找最后一个路径分隔符（/或者\）begin = i + 1;break;}}return filePath.substring(begin, len);}/*** 获取文件名，不带后缀** @param filePath* @return*/public static String getFilename(String filePath) {String name = getName(filePath);if (null == name) {return null;}if (name.contains(".")) {int end = name.indexOf(".");return name.substring(0, end);}return name;}/*** 获取文件后缀 如：.zip** @param filePath* @return*/public static String getFilenameSuffix(String filePath) {String name = getName(filePath);if (null == name) {return null;}if (name.contains(".")) {int end = name.indexOf(".");return name.substring(end);}return name;}/*** 是否为Windows或者Linux（Unix）文件分隔符<br>* Windows平台下分隔符为\，Linux（Unix）为/** @param c 字符* @return 是否为Windows或者Linux（Unix）文件分隔符*/public static boolean isFileSeparator(char c) {return SLASH == c || BACKSLASH == c;}/*** 下载文件名重新编码** @param response     响应对象* @param realFileName 真实文件名* @return*/public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) throws UnsupportedEncodingException {String percentEncodedFileName = percentEncode(realFileName);StringBuilder contentDispositionValue = new StringBuilder();contentDispositionValue.append("attachment; filename=").append(percentEncodedFileName).append(";").append("filename*=").append("utf-8''").append(percentEncodedFileName);response.setHeader("Content-disposition", contentDispositionValue.toString());response.setHeader("download-filename", percentEncodedFileName);}/*** 百分号编码工具方法** @param s 需要百分号编码的字符串* @return 百分号编码后的字符串*/public static String percentEncode(String s) throws UnsupportedEncodingException {String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());return encode.replaceAll("\\+", "%20");}/*** 获取路径下所有文件名和文件路径* 以，分割** @param dirPath 目录路径* @return hashMap name和url*/public static HashMap<String, String> getMapPath(String dirPath) {HashMap<String, String> pathMap = new HashMap<String, String>();File dirFile = new File(dirPath);String[] fileName = dirFile.list();StringJoiner joiner = new StringJoiner(",");for (String name : fileName) {joiner.add(dirPath + name);}pathMap.put("name", String.join(",", fileName));pathMap.put("url", joiner.toString());return pathMap;}public static boolean deleteAllFile(String dir) {File dirFile = new File(dir);// 如果dir对应的文件不存在，或者不是一个目录，则退出if ((!dirFile.exists()) || (!dirFile.isDirectory())) {return false;}boolean flag = true;// 删除文件夹中的所有文件包括子文件夹File[] files = dirFile.listFiles();for (int i = 0; i < files.length; i++) {// 删除子文件if (files[i].isFile()) {flag = deleteFileFlag(files[i].getAbsolutePath());if (!flag) {break;}}// 删除子文件夹else if (files[i].isDirectory()) {flag = deleteAllFile(files[i].getAbsolutePath());if (!flag) {break;}}}if (!flag) {return false;}// 删除当前文件夹if (dirFile.delete()) {return true;} else {return false;}}/*** 删除文件返回bool** @param fileName* @return boolean*/public static boolean deleteFileFlag(String fileName) {File file = new File(fileName);// 如果文件路径只有单个文件if (file.exists() && file.isFile()) {if (file.delete()) {return true;} else {return false;}} else {return false;}}/*** json文件转json对象** @param data 文件流* @return json对象*/public static Map readJsonFile(byte[] data) {Gson gson = new Gson();String json = "";try {Reader reader = new InputStreamReader(new ByteArrayInputStream(data), StandardCharsets.UTF_8);int ch = 0;StringBuilder buffer = new StringBuilder(1024);while ((ch = reader.read()) != -1) {buffer.append((char) ch);}reader.close();json = buffer.toString();return gson.fromJson(json, Map.class);} catch (IOException e) {log.error("json文件转json对象失败，原因是e={}", e.getMessage());return Collections.emptyMap();}}/*** Object 转换为 json 文件** @param finalPath finalPath 是绝对路径 + 文件名，请确保欲生成的文件所在目录已创建好* @param content   需要被转换的 content*/public static void object2JsonFile(String finalPath, String content) {try {OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(finalPath), StandardCharsets.UTF_8);osw.write(content);osw.flush();osw.close();} catch (IOException e) {e.printStackTrace();}}/*** 将java对象转成json文件返回给前端** @param object   转换为 json* @param fileName json文件名称* @param response 结果*/public static void object2JsonFile(Object object, String fileName, HttpServletResponse response) {try {response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));//获取文件的网络输入流byte[] bytes = JSONUtil.toJsonStr(object).getBytes(StandardCharsets.UTF_8);InputStream fis = new ByteArrayInputStream(bytes);byte[] buffer = new byte[1024 * 5];int r;while ((r = fis.read(buffer)) != -1) {response.getOutputStream().write(buffer, 0, r);}} catch (IOException e) {e.printStackTrace();}}/*** 获取封装得MultipartFile** @param inputStream inputStream* @param fileName    fileName* @return MultipartFile*/private MultipartFile getMultipartFile(InputStream inputStream, String fileName) {FileItem fileItem = createFileItem(inputStream, fileName);//CommonsMultipartFile是feign对multipartFile的封装，但是要FileItem类对象return new CommonsMultipartFile(fileItem);}/*** FileItem类对象创建** @param inputStream inputStream* @param fileName    fileName* @return FileItem*/public FileItem createFileItem(InputStream inputStream, String fileName) {FileItemFactory factory = new DiskFileItemFactory(16, null);String textFieldName = "file";FileItem item = factory.createItem(textFieldName, MediaType.MULTIPART_FORM_DATA_VALUE, true, fileName);int bytesRead = 0;byte[] buffer = new byte[8192];OutputStream os = null;//使用输出流输出输入流的字节try {os = item.getOutputStream();while ((bytesRead = inputStream.read(buffer, 0, 8192)) != -1) {os.write(buffer, 0, bytesRead);}inputStream.close();} catch (IOException e) {log.error("Stream copy exception", e);throw new IllegalArgumentException("文件上传失败");} finally {if (os != null) {try {os.close();} catch (IOException e) {log.error("Stream close exception", e);}}if (inputStream != null) {try {inputStream.close();} catch (IOException e) {log.error("Stream close exception", e);}}}return item;}public static int execSh(String bashCommand) {log.info("开始执行shell命令bashCommand={}", bashCommand);int status = 0;try {Runtime runtime = Runtime.getRuntime();String[] bash = {"/bin/bash", "-c", bashCommand};Process exec = runtime.exec(bash);status = exec.waitFor();if (status != 0) {return 1;}} catch (IOException | InterruptedException e) {log.error("执行shell命令bashCommand={}失败，原因是e={}", bashCommand, e.getMessage());}return status;}/*** 执行Shell脚本 0成功 1失败*/public static boolean execSh(String bashCommand, long time, TimeUnit timeUnit) {try {log.info("开始执行shell命令bashCommand={}", bashCommand);Runtime runtime = Runtime.getRuntime();String[] bash = {"/bin/bash", "-c", bashCommand};Process exec = runtime.exec(bash);return exec.waitFor(time, timeUnit);} catch (IOException | InterruptedException e) {log.error("执行shell命令bashCommand={}失败，原因是e={}", bashCommand, e.getMessage());}return false;}public static void deleteTempFiles(File file2, String descDir) {File file1 = new File(descDir);//删除zip解压的数据if (ObjectUtil.isNotEmpty(file1) && file1.exists()) {log.info("file1={}", file1.getPath());deleteFile(file1);}//删除zip文件//删除zip文件if (ObjectUtil.isNotEmpty(file2) && file2.exists()) {log.info("file2={}", file2.getPath());deleteFile(file2);}}public static void deleteFile(File file) {if (file == null) {log.info("deleteFile结果file=null");return;}if (file.isFile()) {boolean delete = file.delete();log.info("删除结果file={},result={}", file.getPath(), delete);} else if (file.isDirectory()) {for (File sub : file.listFiles()) {deleteFile(sub);}file.delete();}}/*** 根据byte数组，生成文件** @param bfile    文件数组* @param filePath 文件存放路径* @param fileName 文件名称*/public static File byte2File(byte[] bfile, String filePath, String fileName) {BufferedOutputStream bos = null;FileOutputStream fos = null;File file = null;try {File dir = new File(filePath);if (!dir.exists() && !dir.isDirectory()) {//判断文件目录是否存在dir.mkdirs();}file = new File(filePath + fileName);fos = new FileOutputStream(file);bos = new BufferedOutputStream(fos);bos.write(bfile);} catch (Exception e) {log.error("byte数组，生成文件失败，原因是e={}", e.getMessage());} finally {try {if (bos != null) {bos.close();}if (fos != null) {fos.close();}} catch (Exception e) {log.error(">>>>   byte2File  error" + e.getMessage());e.printStackTrace();}}return file;}public static byte[] base64StrToBytes(String base64Str) {byte[] bts = org.apache.tomcat.util.codec.binary.Base64.decodeBase64(base64Str);for (int k = 0; k < bts.length; ++k) {//调整异常数据if (bts[k] < 0) {bts[k] += 256;}}return bts;}}

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;/*** @Author:* @Description: 校验分享链接入参*/@Data
@ApiModel("入参")
public class ImageInfo {@ApiModelProperty(name = "id", value = "id", required = true)private String id;@ApiModelProperty(value = "资源路径")private String pathUrl;@ApiModelProperty(value = "文件名称")private String filename;}

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;/*** 入参** @author **** @since 2023/02/16*/@Data
@ApiModel(入参")
public class InfoReqVO {@ApiModelProperty(value = "id")private Long id;@ApiModelProperty(value = "版本号")private Integer version;
}