使用第三方procyon-decompiler-0.5.30.jar对class文件进行反编译

import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.util.Enumeration; import org.apache.commons.compress.archivers.zip.ZipArchiveEntry; import org.apache.commons.compress.archivers.zip.ZipFile; import org.apache.commons.io.IOUtils; import com.strobel.decompiler.Decompiler; import com.strobel.decompiler.DecompilerSettings; import com.strobel.decompiler.PlainTextOutput; public class DecompilerUtils { public static void main(String[] args) throws IOException { // javaDecompiler("E:\\aaa\\RuleAction.class"); //解压jar uncompressZip("E:\\aaa\\aaaaaa\\jd-core-0.7.1.jar"); //遍历目录,对所有class文件反编译 File rootFile = new File("E:\\aaa\\aaaaaa\\jd-core-0.7.1"); if (rootFile.isDirectory()) { listDirectoryDecompiler(rootFile); } } /** * 遍历目录,对class进行反编译 */ public static void listDirectoryDecompiler(File rootFile){ File[] files = rootFile.listFiles(); if (files != null && files.length > 0) { for(File file:files){                 if(file.isDirectory())                     //递归                 listDirectoryDecompiler(file);                 else{                 if (file.getName().endsWith(".class")) {                 //对class文件进行反编译                 javaDecompiler(file.getAbsolutePath()); }                 }             } } } /** * 对class文件进行反编译 * @param classFilePath  class文件完整路径 */ public static void javaDecompiler(String classFilePath){ File file = new File(classFilePath); String fileName = null; if (file.isFile() && file.getName().endsWith(".class")) { fileName = classFilePath.substring(0,classFilePath.lastIndexOf(".")); final DecompilerSettings settings = DecompilerSettings.javaDefaults(); try (final FileOutputStream stream = new FileOutputStream(fileName + ".java"); final OutputStreamWriter writer = new OutputStreamWriter(stream)) { // Decompiler.decompile("E:\\aaa\\RuleAction.class", new PlainTextOutput(writer), settings); Decompiler.decompile(classFilePath , new PlainTextOutput(writer), settings);  } catch (final IOException e) { // handle error  } } } /** * 解压zip,解压jar,解压到当前文件夹下 * @param zipFilePath zip或jar文件完整路径 * @throws IOException  */ public static void uncompressZip(String zipFilePath) throws IOException{ File file = new File(zipFilePath); String fileName = null; if (file.isFile() && (file.getName().endsWith(".zip") || file.getName().endsWith(".jar"))) { fileName = zipFilePath.substring(0,zipFilePath.lastIndexOf(".")); ZipFile zipFile = new ZipFile(zipFilePath); Enumeration<ZipArchiveEntry> en = zipFile.getEntries(); ZipArchiveEntry ze; while (en.hasMoreElements()) { ze = en.nextElement(); File f = new File(fileName, ze.getName()); // 创建完整路径 if (ze.isDirectory()) { f.mkdirs(); continue; } else f.getParentFile().mkdirs(); InputStream is = zipFile.getInputStream(ze); OutputStream os = new FileOutputStream(f); IOUtils.copy(is, os, 4096); is.close(); os.close(); } zipFile.close(); } } }