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@ksakae1216 ksakae1216/all
Created Jun 11, 2017

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package jp.org.web;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
public class FileReadSample {
// ファイル読み込みサンプルメインメソッド
public static void main(String[] asrgs) {
System.out.println("### Sample File Read Start!!");
FileReadSample fr = new FileReadSample();
String file = "/Users/ksakae1216/work/TestFile.txt";
// fr.oldFileRead(file); // 旧来のファイル読み込み
fr.newFileRead(file); // try-with-resourcesでファイル読み込み
System.out.println("### Sample File Read End!!");
}
// 旧来のファイル読み込み
private void oldFileRead(String file) {
FileInputStream fi = null;
InputStreamReader in = null;
BufferedReader br = null;
try {
fi = new FileInputStream(file);
in = new InputStreamReader(fi);
br = new BufferedReader(in);
// ファイル読み込み
String line;
while( (line = br.readLine()) != null) {
System.out.println(line);
}
} catch(Exception e) {
} finally {
try {
// クローズ処理
br.close();
in.close();
fi.close();
} catch(Exception fe) {
// クローズ失敗
}
}
}
// try-with-resourcesでファイル読み込み
private void newFileRead(String file) {
try(FileInputStream fi = new FileInputStream(file);
InputStreamReader in = new InputStreamReader(fi);
BufferedReader br = new BufferedReader(in)) {
// ファイル読み込み
String line;
while( (line = br.readLine()) != null) {
System.out.println(line);
}
} catch(Exception e) {
} finally {
// クローズ処理不要
}
}
}
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