Created
March 28, 2013 04:46
-
-
Save 2sbsbsb/5260711 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package util.text; | |
| import java.io.BufferedReader; | |
| import java.io.DataInputStream; | |
| import java.io.FileInputStream; | |
| import java.io.IOException; | |
| import java.io.InputStreamReader; | |
| import java.util.ArrayList; | |
| import java.util.LinkedHashMap; | |
| import java.util.List; | |
| import java.util.Map; | |
| /*- | |
| * | |
| * Advantage | |
| * 1. It can read any config files of any format (csv, properties file or any text files). | |
| * 2 Format can be | |
| * 2.a keys = values1, values2, values3 | |
| * 2.b keys, values1, values2, values3 | |
| * 3. keys with space also works | |
| * 4. One key multiple values | |
| * 5. Comment line starts with #. Even this can be made configuration | |
| * 6. The order of the keys is maintained. | |
| * 7. The order of the values for any given key is also maintained. | |
| */ | |
| public class ConfigFileReader { | |
| private final String path; | |
| private final String keyValueSeparation; | |
| private final String valueSeparation; | |
| public final String COMMENT_LINE_STATRTS_WITH = "#"; | |
| /** | |
| * @param path | |
| * @param keyValueSeparation | |
| * @param valueSeparation | |
| */ | |
| public ConfigFileReader(String path, String keyValueSeparation, String valueSeparation) { | |
| this.path = path; | |
| this.keyValueSeparation = keyValueSeparation; | |
| this.valueSeparation = valueSeparation; | |
| } | |
| /** | |
| * @param path | |
| * @return | |
| * @throws IOException | |
| */ | |
| public Map<String, List<String>> readkeyValues() throws IOException { | |
| // LinkedHashMap retains the order too | |
| Map<String, List<String>> map = new LinkedHashMap<String, List<String>>(); | |
| BufferedReader br = null; | |
| try { | |
| FileInputStream fstream = new FileInputStream(path); | |
| // Get the object of DataInputStream | |
| DataInputStream in = new DataInputStream(fstream); | |
| br = new BufferedReader(new InputStreamReader(in)); | |
| String strLine; | |
| // Read File line by line | |
| while ((strLine = br.readLine()) != null) { | |
| if (!strLine.trim().equalsIgnoreCase("")) { | |
| if (strLine.startsWith(COMMENT_LINE_STATRTS_WITH)) { | |
| continue; | |
| } | |
| String[] keyValues = strLine.split(keyValueSeparation); | |
| String key = keyValues[0].trim(); | |
| StringBuilder valuesBuilder = new StringBuilder(); | |
| if (keyValues.length > 1) { | |
| for (int i = 1; i < keyValues.length; i++) { | |
| valuesBuilder.append(keyValues[i]); | |
| valuesBuilder.append(valueSeparation); | |
| } | |
| } | |
| String values = valuesBuilder.toString(); | |
| String[] multipleValues = values.split(valueSeparation); | |
| List<String> nultipleV = new ArrayList<String>(); | |
| for (String v : multipleValues) { | |
| if (!v.trim().equalsIgnoreCase("")) { | |
| nultipleV.add(v.trim()); | |
| } | |
| } | |
| map.put(key, nultipleV); | |
| } | |
| } | |
| } finally { | |
| br.close(); | |
| } | |
| return map; | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment