質問編集履歴
1
コードのミスしている個所に、コメントを付与
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File without changes
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body
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@@ -51,7 +51,7 @@
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51
51
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public int insertStudent(String studentName) {
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Map<String,Object> sqlMap = new HashMap<>();
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sqlMap.put("studentName",studentName);
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54
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sqlSession.insert("insertStudent", studentName);
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54
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+
sqlSession.insert("insertStudent", studentName); //誤り。正しくは`sqlMap`を渡す
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return (int) sqlMap.get("studentId"); //NullPointerException
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}
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