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任何人都可以解释如何将下面的代码转换为JDK 7风格autoclosable ???java 7 closeable PreparedStatement
PreparedStatement p = = conn.prepareStatement("INSERT INTO myTable(colName) VALUES(?)", Statement.RETURN_GENERATED_KEYS);
p.setObject(1, obj);
int r = p.executeUpdate();
ResultSet rs = p.getGeneratedKeys();
if (null != rs && rs.next()) {
activityInfoId = rs.getLong(1);
}