Java UTF8 addLineIds(String inFile, String outFile)

Description

add Line Ids

License

Apache License

Declaration

public static void addLineIds(String inFile, String outFile) throws IOException 

Method Source Code

//package com.java2s;
/*//from w  w w . j  av a  2  s . c om
 * (C) Copyright 2017 Shuangyan Liu
 * Shuangyan.Liu@open.ac.uk 
 * Knowledge Media Institute
 * The Open University, United Kingdom
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;

import java.util.List;

public class Main {
    public static void addLineIds(String inFile, String outFile) throws IOException {
        StringBuilder builder = new StringBuilder();
        List<String> list = Files.readAllLines(Paths.get(inFile), StandardCharsets.UTF_8);
        int id = 1;
        for (String line : list) {
            builder.append(id + "\t" + line);
            builder.append(System.lineSeparator());
            id++;
        }
        writeFile(builder.toString(), outFile, false);
    }

    public static void writeFile(String content, String filepath, boolean append) {
        BufferedWriter writer = null;
        File file = new File(filepath);
        file.getParentFile().mkdirs();
        try {
            writer = new BufferedWriter(new FileWriter(file, append));
            writer.write(content);

        } catch (IOException e) {
        } finally {
            try {
                if (writer != null)
                    writer.close();
            } catch (IOException e) {
            }
        }
    }
}

Related

1. appendToFile(String outputFile, String contents)
2. asStringUTF8(byte[] bytes)
3. asUTF16BEEncoded(String basicString)
4. asUtf8(byte[] bytes)