java.util.zip.ZipException：無效的文字/長度代碼

我解壓縮了3個文檔（1.docx和2 .pdf）的base64字符串，我試圖將這些字符串轉換回它們的文檔。這是我正在嘗試的代碼。此代碼適用於.docx字符串，但不適用於.pdf字符串。java.util.zip.ZipException：無效的文字/長度代碼

public static void main(String[] args) throws IOException, DataFormatException { 
    String outputFilePath = "document.pdf"; 
    File file = new File(outputFilePath); 
    FileOutputStream fos = new FileOutputStream(file); 
    String str = FileUtils.readFileToString(new File(file_name_containing_compressed_base64_string), "utf-8"); 
    byte[] zipData = Base64.decodeBase64(str); 
    GZIPInputStream zi = new GZIPInputStream(new ByteArrayInputStream(zipData)); 
    IOUtils.copy(zi, fos); 

    fos.close(); 
    zi.close(); 

}

，我在網上收到例外IOUtils.copy(zi, fos);異常的一個.PDF字符串

java.util.zip.ZipException: invalid literal/length code 
at java.util.zip.InflaterInputStream.read(Unknown Source) 
at java.util.zip.GZIPInputStream.read(Unknown Source) 
at java.io.FilterInputStream.read(Unknown Source) 
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1792) 
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1769) 
at org.apache.commons.io.IOUtils.copy(IOUtils.java:1744) 
at com.fileHandling.FileOutput.main(FileOutput.java:126)

和第二.PDF字符串的例外是

java.util.zip.ZipException: invalid distance too far back 
at java.util.zip.InflaterInputStream.read(Unknown Source) 
at java.util.zip.GZIPInputStream.read(Unknown Source) 
at java.io.FilterInputStream.read(Unknown Source) 
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1792) 
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1769) 
at org.apache.commons.io.IOUtils.copy(IOUtils.java:1744) 
at com.fileHandling.FileOutput.main(FileOutput.java:126)

請給我建議這些原因例外情況以及如何解決這些例外情況

來源

2015-12-27 user1432292