Remove whitespaces from XML file read from a zip file

Question

I'm reading in an XML file that's stored inside a zip file. I need to remove the whitespaces, but I nothing seems to work. Here's what I have, but trim() isn't doing anything.

        for (Enumeration e = zip.entries(); e.hasMoreElements(); ) {

            ZipEntry entry = (ZipEntry) e.nextElement();
            InputStream inputStream = zip.getInputStream(entry);
            InputStreamReader inputStreamReader = InputStreamReader(inputStream);  
            char[] buffer = new char[1024];
            while (inputStreamReader.read(buffer, 0, buffer.length) != -1) {

                String str = new String(buffer);

                System.out.println(str.trim());
       }

score 2 · Accepted Answer · answered May 07 '15 at 01:30

2

trim() will remove any leading or trailing whitespace, but I don't think you can combine the trim command with the System.out.println. Will that capture the results of the trim command?

Have you tried the following?

String result = str.trim();
System.out.println(result);

If that doesn't work, what about using replaceAll()?

String result = str.replaceAll(" ","");
System.out.println(result);

Or if its not a simple whitespace character, try something like this that removes more than one whitespace?

String result = str.replaceAll("\\s+","");
System.out.println(result);

answered May 07 '15 at 01:30

3m0l3y

46
4

1

Thanks. The 3rd option did the job. – user3007194 May 07 '15 at 01:41
Glad to hear it. Thanks for giving me my first ever vote on my first ever post on StackOverflow. – 3m0l3y May 07 '15 at 02:10

score 1 · Answer 2 · answered May 07 '15 at 01:56

This should resolve your issue. Opening a zip --> Reading a file --> Trimming a file.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

/**
 *
 * @author comrench
 */
public class XMLTrim {
    ZipEntry zipEntry;
    Enumeration enumEntries;
    BufferedReader bufferedReader;
    InputStreamReader inputStreamReader;
    ZipFile zip;
    private String line=null;
    public static void main(String[] args){
        XMLTrim xmlTrim= new XMLTrim();
        xmlTrim.trim();
    }

    public void trim(){
        try {            
            Path tempPath=Paths.get("D:\\share\\tmp.zip");
            zip = new ZipFile(tempPath.toFile());
            Enumeration enumEntries= zip.entries();
            while(enumEntries.hasMoreElements()){
                zipEntry = (ZipEntry) enumEntries.nextElement();
                readFileContent();
            }
        } catch (IOException ex) {
            System.out.println("exception ex"+ex);
        }
    }

    private void readFileContent() {
        try {
            inputStreamReader = new InputStreamReader(zip.getInputStream(zipEntry));
            bufferedReader=new BufferedReader(inputStreamReader);  
            while ((line = bufferedReader.readLine()) != null) {
                System.out.println(line.trim());
            }
        } catch (IOException e) {
            System.out.println("Exception "+e);
        }            
    }
}

Remove whitespaces from XML file read from a zip file

2 Answers2