jar文件是Java项目的重要构成部分。但是有些时候, 我们需要手动查看或分析jar文件里面的源代码。这时候就需要将jar文件转换成txt文件了。有许多种方法可以实现这个目标,但是在Java开发中需要用Java编写jar转txt的代码来自动化处理。
下面我们来看看如何用Java将jar文件转成txt文件。首先,需要通过Java的ZipInputStream类读取jar文件的内容,然后将读取到的字节数组写入到txt文件中即可。以下是Java的源代码:
import java.io.*;import java.util.zip.*;public class JarToTxt { public static void main(String[] args) throws Exception { // Read jar file into a byte array File file = new File("/path/to/yourfile.jar"); FileInputStream fis = new FileInputStream(file); byte[] byteArray = new byte[(int) file.length()]; fis.read(byteArray); fis.close(); // Convert byte array to text file FileOutputStream fos = new FileOutputStream("/path/to/yourfile.txt"); ZipInputStream zipStream = new ZipInputStream(new ByteArrayInputStream(byteArray)); ZipEntry zipEntry = zipStream.getNextEntry(); if(zipEntry == null) { System.err.println("No entries found in this jar file!"); return; } while(zipEntry != null) { BufferedOutputStream bos = new BufferedOutputStream(fos); byte[] buffer = new byte[2048]; int read = 0; while((read = zipStream.read(buffer)) != -1) { bos.write(buffer, 0, read); } bos.flush(); bos.close(); zipStream.closeEntry(); zipEntry = zipStream.getNextEntry(); } System.out.println("Jar file was successfully converted to text"); fos.close(); }}