How to detect the duplicate keys in .properties file.
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;
public class PropertyDuplicateCheck {
/**
* @param args
*/
public static void main(String[] args) {
FileInputStream fis = null;
String EQUALs = "=";
try {
fis = new FileInputStream("Z:\\dsp-jarpaths.properties");
Set<String> set = new TreeSet<String>();
Map<String, Integer> map = new TreeMap<String, Integer>();
BufferedReader br = new BufferedReader(new InputStreamReader(fis));
String strLine;
String keyValuePair[] = null;
System.out.println("Unparsed or commented Lines:");
while ((strLine = br.readLine()) != null) {
if (strLine.contains(EQUALs)) {
keyValuePair = strLine.split(EQUALs);
String key = keyValuePair[0];
if (!set.add(key)) {
if (map.containsKey(key)) {
map.put(key, map.get(key).intValue() + 1);
} else {
map.put(key, 2);
}
}
} else {
System.out.println(strLine);
}
}
System.out.println("Print duplicate entry with duplication count:"
+ map);
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
} finally {
try {
fis.close();
} catch (Exception e) {
// do nothing
}
}
}
}
2 comments:
This is easier methinks
/**
* Purpose: Properties doesn't detect duplicate keys. So this exists.
* @author shaned
*/
package com.naehas.tests.configs;
import java.util.Properties;
import org.apache.log4j.Logger;
public class NaehasProperties extends Properties
{
private static final long serialVersionUID = 1L;
private static final Logger log = Logger.getLogger(NaehasProperties.class);
public NaehasProperties()
{
super();
}
/**
* @param defaults
*/
public NaehasProperties(Properties defaults)
{
super(defaults);
}
/**
* Overriding the HastTable put() so we can check for duplicates
*
*/
public synchronized Object put(Object key, Object value)
{
// Have we seen this key before?
//
if (get(key) != null)
{
StringBuffer message = new StringBuffer("Duplicate key found: " + key + " with value: " + value);
message.append(". Original value is: " + (String) get(key));
log.error(message.toString());
// Setting key to null will generate an exception and cause an exit.
// Can not change the signature by adding a throws as it's not compatible
// with HashTables put().
//
key = null;
}
return super.put(key, value);
}
}
Can I simply just say what a relief to discover somebody that truly understands what they're talking about on the web. You definitely know how to bring an issue to light and make it important. A lot more people ought to check this out and understand this side of the story. I was surprised you're not more popular because you most certainly have the gift. facebook.com login
Post a Comment