Mapping objects from files in Java
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Java
I want to map my objects from a text file. The content of the text file is as follows:
~ attribute1value attribute2value attribute3value attribute4value attribute5value attribute6value ~ attribute1value attribute2value attribute3value attribute4value attribute5value attribute6value ...continued same
Therefore, for each five attributes, I want to create a new object and map these six attributes to it (this is not a problem). The problem is how I read the time zone bar, how to get the first group, the second group, etc thank you
Solution
This is a more flexible approach We can specify a custom (single line) separator, which is actually not required at the beginning or end of the file (but can be given), and the number of lines of records is flexible The data is parsed into a simple model that can be used to validate the data and create the final object
private String recordDelimiter = "~"; public static List<List<String>> parse(Reader reader) { List<List<String>> result = new ArrayList<List<String>>(); List<String> record = new ArrayList<String>(); boolean isFirstLine = true; while ((line = reader.readLine()) != null) { line = line.trim(); if (line.length() == 0) { continue; // we skip empty lines } if (delimiter.equals(line.trim()) { if (!isFirstLine) { result.add(record); record = new ArrayList<String>(); } else { isFirstLine = false; // we ignore a delimiter in the first line. } continue; } record.add(line); isFirstLine = false; } if (!result.contains(record)) result.add(record); // in case the last line is not a separator return result; }
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