线程“main”中的exceptionjava.util.zip.DataFormatException：不正确的标头检查

我用Java编写了一个应用程序，用于使用Deflaor和Inflator压缩和解压缩String。 但是当我运行以下代码时，我得到以下exception。 任何人都可以告诉我一些解决方案

Deflated String:x  Q n 0  @>"C  E    3 ,[ d    9  P      x O     hcy  L  Ct  {~m I: $ %\HD+ I   NwG Exception in thread "main" java.util.zip.DataFormatException: incorrect header check at java.util.zip.Inflater.inflateBytes(Native Method) at java.util.zip.Inflater.inflate(Inflater.java:223) at java.util.zip.Inflater.inflate(Inflater.java:240) at sample_ftp.Sample_ftp.main(Sample_ftp.java:70) Java Result: 1 

我的代码是这个

  // Encode a String into bytes String inputString = "Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar Tu hi bata Pehla nasha Pehla khumaar Udta hi firoon in hawaon mein kahin Ya main jhool jaoon in ghataon mein kahin Udta hi firoon in hawaon mein kahin Ya main jhool jaoon in ghataon mein kahin Ek kar doon aasmaan zameen Kaho yaaron kya karoon kya nahin Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar Tu hi bata Pehla nasha Pehla khumaar Usne baat ki kuchh aise dhang se Sapne de gaya vo hazaaron range ke Usne baat ki kuchh aise dhang se Sapne de gaya vo hazaaron range ke Reh jaoon jaise main haar ke Aur choome vo mujhe pyaar se Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar"; byte[] input = inputString.getBytes("UTF-8"); // Compress the bytes byte[] output1 = new byte[100]; Deflater compresser = new Deflater(); compresser.setInput(input); compresser.finish(); int compressedDataLength = compresser.deflate(output1); compresser.end(); System.out.println("Deflated String:"+new String(output1)); String str=new String(output1); byte output2[]=str.getBytes("UTF-8"); // Decompress the bytes Inflater decompresser = new Inflater(); decompresser.setInput(output2); byte[] result = new byte[10000]; int resultLength = decompresser.inflate(result); decompresser.end(); // Decode the bytes into a String String outputString = new String(result, 0, resultLength, "UTF-8"); System.out.println("Deflated String:"+outputString); 

Answer 1

你的代码有几个问题：

1）您的假设是使用deflator返回的Byte Array output1可以是没有有效编码的有效String – 从您的代码中可以看出：

 String str=new String(output1); byte output2[]=str.getBytes("UTF-8"); 

相反，不要不必要地转换再见数组表示，但直接传递它： decompresser.setInput(output1)

编辑：根据评论中的新要求进行了更改

2）您正在为您的inflate设置一个空白字节数组，这将导致一个空字符串（此处）：

 byte[] result = new byte[10000]; int resultLength = decompresser.inflate(result); 

3）您将压缩缓冲区大小限制为100; 我增加了它以适应你的整个字符串

 byte[] output1 = new byte[input.length]; 

您可以使用从String或前一个字节数组派生的字节数组

编辑：正如评论中所指出的，要求是专门从String中获取字节数组，因此以String格式表示二进制数据Base64编码方案将起作用，将代码修改为该效果：

 import org.apache.axis.encoding.Base64; 

更改的代码：

 public static void main(String[] args) { try { // Encode a String into bytes String inputString = "Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar Tu hi bata Pehla nasha Pehla khumaar Udta hi firoon in hawaon mein kahin Ya main jhool jaoon in ghataon mein kahin Udta hi firoon in hawaon mein kahin Ya main jhool jaoon in ghataon mein kahin Ek kar doon aasmaan zameen Kaho yaaron kya karoon kya nahin Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar Tu hi bata Pehla nasha Pehla khumaar Usne baat ki kuchh aise dhang se Sapne de gaya vo hazaaron range ke Usne baat ki kuchh aise dhang se Sapne de gaya vo hazaaron range ke Reh jaoon jaise main haar ke Aur choome vo mujhe pyaar se Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar"; byte[] input = inputString.getBytes("UTF-8"); // Compress the bytes byte[] output1 = new byte[input.length]; Deflater compresser = new Deflater(); compresser.setInput(input); compresser.finish(); int compressedDataLength = compresser.deflate(output1); compresser.end(); String str = Base64.encode(output1); System.out.println("Deflated String:" + str); byte[] output2 = Base64.decode(str); // Decompress the bytes Inflater decompresser = new Inflater(); decompresser.setInput(output2); byte[] result = str.getBytes(); int resultLength = decompresser.inflate(result); decompresser.end(); // Decode the bytes into a String String outputString = new String(result, 0, resultLength, "UTF-8"); System.out.println("Deflated String:" + outputString); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (DataFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } } 

输出：

 Deflated String:eJzNUbtuwzAM/BX+QD4iQ6eiRdDH0PESM6YsWwpku4X99Tna7lC03QK0g42TeOQdTwe1FpLQG+Sw4GhjBxR5xAS5TA4NgRQeQxp09pt7fm3OSTqEJJElXBJIRCv7SaUK7U53R40oTn/Q8u3uZRQLcsTwKfyTideKZdLOobgatQwfcF11XRj/b1hdNJZzKw02Ym0c/ZV522l3kaBI5Qygp98kMzrVxHgsi0eX13DIyxtMS+/vG/+P2Puk5GCQGCSOJzNB6DnLkGoheKYujyq1+3vPtDCv6xYyVKLeZMaT2vYEzdK7rG3ukMX9WOTEV+rUm7uxMd2CI/PPAr Deflated String:Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar Tu hi bata Pehla nasha Pehla khumaar Udta hi firoon in hawaon mein kahin Ya main jhool jaoon in ghataon mein kahin Udta hi firoon in hawaon mein kahin Ya main jhool jaoon in ghataon mein kahin Ek kar doon aasmaan zameen Kaho yaaron kya karoon kya nahin Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar Tu hi bata Pehla nasha Pehla khumaar Usne baat ki kuchh aise dhang se Sapne de gaya vo hazaaron range ke Usne baat ki kuchh aise dhang se Sapne de gaya vo hazaaron range ke Reh jaoon jaise main haar ke Aur choome vo mujhe pyaar se Pehla nasha Pehla khumaar Naya pyaar hai naya intezaar Kar loon main kya apna haal Aye dil-e-bekaraar Mere dil-e-bekaraar 

…..