回答編集履歴
1
処理中に例外が発生してロールバックのコピーに失敗した場合にもテンポラリを削除してしまうのを修正、他
test
CHANGED
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@@ -8,19 +8,24 @@
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8
8
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public class Test {
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9
9
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public static void main(String[] args) throws IOException {
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10
10
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Path path = Path.of("zzz.txt"); //"c:\\output\\input.txt"
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11
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-
Path tmpPath = File.createTempFile("tmp", ".txt")
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11
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+
Path tmpPath = Files.createTempFile("tmp", ".txt");
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12
12
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Files.copy(path, tmpPath, StandardCopyOption.REPLACE_EXISTING);
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13
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-
try(BufferedReader reader = new BufferedReader(new FileReader(tmpPath.toFile()));
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14
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-
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13
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+
try(PrintWriter writer = new PrintWriter(path.toFile())) {
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14
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try(BufferedReader reader = Files.newBufferedReader(tmpPath)) {
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15
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-
// 置換処理
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15
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// 置換処理
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16
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-
for(String line; (line = reader.readLine()) != null; ) {
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16
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for(String line; (line = reader.readLine()) != null; ) {
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17
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-
writer.println(line.replaceAll("\\?", " "));
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17
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+
writer.println(line.replaceAll("\\?", " "));
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18
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}
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18
19
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}
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20
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try { Files.deleteIfExists(tmpPath); } catch(Exception ignore) {}
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19
21
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} catch(Exception e) {
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22
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try {
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20
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-
Files.copy(tmpPath, path, StandardCopyOption.REPLACE_EXISTING); //戻す
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23
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Files.copy(tmpPath, path, StandardCopyOption.REPLACE_EXISTING); //戻す
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24
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try { Files.deleteIfExists(tmpPath); } catch(Exception ignore) {}
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25
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} catch(Exception ee) {
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26
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System.out.println("rollback error. the original is in " + tmpPath);
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27
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}
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21
28
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throw e;
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22
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-
} finally {
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23
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-
Files.deleteIfExists(tmpPath);
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24
29
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}
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25
30
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}
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26
31
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}
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