反编译apk文件，查找jar文件中字符串

原创于 2020-12-02 15:45:10 发布 · 1k 阅读

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#反编译 #jar文件中查找字符

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博客涉及jar文件反编译及在其中查找字符相关内容，属于信息技术领域操作，能帮助解决在jar文件中获取特定信息的问题。

package com.lzxx.testdemo.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class FindStrInJar {

    public String condition;  //查询的条件


    public ArrayList<String> jarFiles = new ArrayList<String>();


    public FindStrInJar() {
    }


    public FindStrInJar(String condition) {
        this.condition = condition;
    }

    public FindStrInJar(String condition, String exclude) {
        this.condition = condition;
    }


    public void setCondition(String condition) {
        this.condition = condition;
    }

    public List<String> find(String dir, boolean recurse) {
        searchDir(dir, recurse);
        return this.jarFiles;
    }

    public List<String> getFilenames() {
        return this.jarFiles;
    }


    protected String getClassName(ZipEntry entry) {
        StringBuffer className = new StringBuffer(entry.getName().replace("/", "."));
        return className.toString();
    }


    protected void searchDir(String dir, boolean recurse) {
        try {
            File d = new File(dir);
            if (!d.isDirectory()) {
                return;
            }
            File[] files = d.listFiles();
            for (int i = 0; i < files.length; i++) {
                if (recurse && files[i].isDirectory()) {
                    searchDir(files[i].getAbsolutePath(), true);
                } else {
                    String filename = files[i].getAbsolutePath();
                    if (filename.endsWith(".jar") || filename.endsWith(".zip")) {
                        ZipFile zip = new ZipFile(filename);
                        Enumeration<? extends ZipEntry> entries = zip.entries();
                        while (entries.hasMoreElements()) {
                            ZipEntry entry = entries.nextElement();
                            String thisClassName = getClassName(entry);

                            //按照文件内容搜索文件。搜索扩展名为.class的文件
                            if (thisClassName.lastIndexOf(".class") != -1) {
                                BufferedReader r = new BufferedReader(new InputStreamReader(zip.getInputStream(entry)));
                                while (r.read() != -1) {
                                    String tempStr = r.readLine();
                                    if (null != tempStr && tempStr.indexOf(condition) > -1) {
                                        this.jarFiles.add(filename + "  --->  " + thisClassName);
                                        break;
                                    }
                                }
                            }

                            //按照文件名搜索文件
//                            if (thisClassName.contains(condition)) {
//                                this.jarFiles.add(filename + "  --->  " + thisClassName);
//                            }
                            //获取扩展名为properties的文件
//                            if(thisClassName.lastIndexOf("properties")>-1) {
//                              this.jarFiles.add(filename + "  --->  " + thisClassName);
//                            }
                        }
                        zip.close();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    public static void main(String args[]) {
        FindStrInJar findInJar = new FindStrInJar("example"); //要寻找的字符串
        // windows
//        List<String> jarFiles = findInJar.find("E:/workspace/AccountServiceCenter/lib", true);
		// mac
        List<String> jarFiles = findInJar.find("/Users/xxx/jar文件所在文件夹路径", true);
        if (jarFiles.size() == 0) {
            System.out.println("Not Found");
        } else {
            for (int i = 0; i < jarFiles.size(); i++) {
                System.out.println(jarFiles.get(i));
            }
        }
    }

}