回答編集履歴
1
コード例に"UTF-8"の指定が漏れていたので追記
test
CHANGED
@@ -44,7 +44,7 @@
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44
44
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FileOutputStream fos = new FileOutputStream("...");
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47
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-
OutputStreamWriter osw = new OutputStreamWriter(fos);
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47
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+
OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
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osw.write('\uFEFF');
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@@ -62,7 +62,7 @@
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62
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FileOutputStream fos = new FileOutputStream("...");
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-
OutputStreamWriter osw = new OutputStreamWriter(fos);
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65
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+
OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
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osw.write("日本語");
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