Java tutorial
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We also recommend that a * file or class name and description of purpose be included on the * same "printed page" as the copyright notice for easier * identification within third-party archives. * * Copyright 2016 Alibaba Group * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * */ package com.taobao.android.builder.tools.asm; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; import java.util.Enumeration; import java.util.Map; import java.util.jar.JarEntry; import java.util.jar.JarFile; import java.util.jar.JarOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; /** * Created by wuzhong on 2016/12/13. */ public abstract class ClazzBasicHandler { public static Logger logger = LoggerFactory.getLogger(ClazzBasicHandler.class); protected File jar; protected File outJar; protected Map<String, String> reMapping; public ClazzBasicHandler(File jar, File outJar, Map<String, String> reMapping) { this.jar = jar; this.outJar = outJar; this.reMapping = reMapping; } public void execute() throws IOException { logger.info("[ClazzReplacer] rewriteJar from " + jar.getAbsolutePath() + " to " + outJar.getAbsolutePath()); JarFile jarFile = new JarFile(jar); JarOutputStream jos = new JarOutputStream(new BufferedOutputStream(new FileOutputStream(outJar))); Enumeration<JarEntry> jarFileEntries = jarFile.entries(); while (jarFileEntries.hasMoreElements()) { JarEntry ze = jarFileEntries.nextElement(); String pathName = ze.getName(); logger.info(jar.getAbsolutePath() + "->" + pathName); if (!pathName.endsWith(".class")) { justCopy(jarFile, jos, ze, pathName); continue; } handleClazz(jarFile, jos, ze, pathName); } jarFile.close(); // IOUtils.closeQuietly(fileOutputStream); IOUtils.closeQuietly(jos); } protected void justCopy(JarFile jarFile, JarOutputStream jos, JarEntry ze, String pathName) { try { InputStream inputStream = jarFile.getInputStream(ze); copyStreamToJar(inputStream, jos, pathName, ze.getTime()); } catch (Exception e) { logger.error("justCopy exception", e); } } protected abstract void handleClazz(JarFile jarFile, JarOutputStream jos, JarEntry ze, String pathName); protected void copyStreamToJar(InputStream zin, ZipOutputStream out, String currentName, long fileTime) throws IOException { // Create new entry for zip file. ZipEntry newEntry = new ZipEntry(currentName); // Make sure there is date and time set. if (fileTime != -1) { newEntry.setTime(fileTime); // If found set it into output file. } out.putNextEntry(newEntry); if (zin != null) { IOUtils.copy(zin, out); } IOUtils.closeQuietly(zin); } }