如何单独插入每个<list>值</list>

Question

我需要你的帮助才能在列表中插入每个值

private List<String> selectedCertificate = new ArrayList<String>();

所选证书的值为[＆＃34; A＆＃34;，＆＃34; B＆＃34;，＆＃34; C＆＃34;]我想在单独的行中插入每个项目相同的id（ex.50）

Record No.1  50  A
Record No.1  50  B
Record No.1  50  C

    Connection dbConnection = null;
    PreparedStatement preparedStatement = null;

    String insertTableSQL = "INSERT INTO temp"
            + "(USER_ID, Certificate_Code) VALUES"
            + "(?,?)";

    try {
        dbConnection = getDBConnection();
        preparedStatement = dbConnection.prepareStatement(insertTableSQL);

        preparedStatement.setInt(1, 50);
        preparedStatement.setString(2, selectedCertificate);

        // execute insert SQL stetement
        preparedStatement.executeUpdate();

        System.out.println("Record is inserted");

    } catch (SQLException e) {

        System.out.println(e.getMessage());

    }

这会有所帮助：

 (String certificate: certificates) 
{   
preparedStatement.setInt(1, 50);
preparedStatement.setString(2, selectedCertificate);
}

Answer 1

也许这样的事情应该没问题

String insertTableSQL = "INSERT INTO temp"
        + "(USER_ID, Certificate_Code) VALUES"
        + "(?,?)";

try {
    dbConnection = getDBConnection();
    preparedStatement = dbConnection.prepareStatement(insertTableSQL);

    for(String certif : selectedCertificate) {
        preparedStatement.setInt(1, 50);
        preparedStatement.setString(2, certif);
        preparedStatement.addBatch();
    }

    // execute insert SQL stetement
    preparedStatement.executeUpdate();

    dbConnection.commit();
    System.out.println("Record is inserted");

} catch (SQLException e) {

    System.out.println(e.getMessage());

}