如何重用/重置ZipInputStream? [英] How to reuse / reset an ZipInputStream?

问题描述

我想重置ZipInputStream(即回到起始位置)以便按顺序读取某些文件.我怎么做?我太困了...

I want to reset the ZipInputStream (ie back to the start position) in order to read certain files in order. How do I do that? I am so stucked...

      ZipEntry entry;
        ZipInputStream input = new ZipInputStream(fileStream);//item.getInputStream());

        int check =0;
        while(check!=2){

          entry = input.getNextEntry();
          if(entry.getName().toString().equals("newFile.csv")){
              check =1;
              InputStreamReader inputStreamReader = new InputStreamReader(input);
                reader = new CSVReader(inputStreamReader);
                //read files
                //reset ZipInputStream if file is read.
                }
                reader.close();
          }
            if(entry.getName().toString().equals("anotherFile.csv")){
              check =2;
              InputStreamReader inputStreamReader = new InputStreamReader(input);
                reader = new CSVReader(inputStreamReader);
                //read files
                //reset ZipInputStream if file is read.
                }
                reader.close();
          }

        }

推荐答案

如果可能(例如，您有一个实际的文件，而不仅仅是要读取的流)，请尝试使用

If possible (i.e. you have an actual file, not just a stream to read from), try to use the ZipFile class rather than the more low-level ZipInputStream. ZipFile takes care of jumping around in the file and opening streams to individual entries.

ZipFile zip = new ZipFile(filename);
ZipEntry entry = zip.getEntry("newfile.csv");
if (entry != null){
    CSVReader data = new CSVReader(new InputStreamReader(
         zip.getInputStream(entry)));
} 

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