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java code to compare csv file against a table
“java code to compare csv file against a table” Code Answer
java code to compare csv file against a table
java by
Hungry Herring
on Jul 16 2020
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HashMap<String, String> f1 = new HashMap<String, String>(); HashMap<String, String> f2 = new HashMap<String, String>(); // read f1, f2; use PK field as the key List<String> deleted = new ArrayList<String>(); List<String> updated = new ArrayList<String>(); for(Map.Entry<String, String> entry : f1.keySet()) { if(!f2.containsKey(entry.getKey()) { deleted.add(entry.getValue()); } else { if(!f2.get(entry.getKey().equals(f1.getValue())) { updated.add(f1.getValue()); } } } for(String key : f1.keySet()) { f2.remove(key); } // f2 now contains only "new" rows
Source:
stackoverflow.com
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