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サーブレットが実行されると、MySQL Exception が発生します。クエリで構文が間違っている場所を見つけることができません。次の例外が発生しています -

com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: SQL 構文にエラーがあります。's1.employee_id='I123' および s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d') -' at で使用する正しい構文については、MySQL サーバーのバージョンに対応するマニュアルを確認してください。ライン1

以下は、mysql クエリを含むサーブレットです -

   import java.io.IOException;
    import java.sql.ResultSet;
    import java.text.SimpleDateFormat;

    import java.util.Date;
    import java.util.Locale;

    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;

    public class HomepageTable extends connection {
        String sql,table;
        ResultSet rs = null;
        private static final long serialVersionUID = 1L;
        Date now = new Date();

        SimpleDateFormat dateFormat = new SimpleDateFormat("EEE", Locale.US); 
        String asWeek = dateFormat.format(now);

        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            try
            {
                System.out.println(asWeek);
                get_connection();
            if(asWeek.equals("Mon"))
            {
                sql="select e1.employee_name,d1.dealer_name , d2.distributor_name ,  s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
                        "from sales_master_table s1 " +
                        "left join dealers_info d1 on s1.dealer_visited = d1.dealer_id " +
                        "left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
                        "left join territory_master_table r1 on r1.region_code = s1.region" +
                        "left join area_master_table a1 on a1.area_code = s1.area" +
                        "left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
                        "where " +
                        "s1.employee_id=? and" +
                        "s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY" +
                        "union" +
                        "select e1.employee_name,d1.dealer_name , d2.distributor_name ,  s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
                        "from sales_master_table s1" +
                        "left join dealers_info d1 on s1.dealer_visited = d1.dealer_id" +
                        "left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
                        "left join territory_master_table r1 on r1.region_code = s1.region" +
                        "left join area_master_table a1 on a1.area_code = s1.area" +
                        "left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
                        "where" +
                        "s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY" +
                        "and level1_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
                        "where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
                        "or level2_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
                        "where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
                        "or level3_head= (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
                        "where e2.employee_id=s2.employee_id and s2.employee_id=?)";
            }
            else
            {
                sql="(select e1.employee_name,d1.dealer_name , d2.distributor_name ,  s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
                    "from sales_master_table s1 " +
                    "left join dealers_info d1 on s1.dealer_visited = d1.dealer_id " +
                    "left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
                    "left join territory_master_table r1 on r1.region_code = s1.region" +
                    "left join area_master_table a1 on a1.area_code = s1.area" +
                    "left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
                    "where " +
                    "s1.employee_id=? and " +
                    "s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')-INTERVAL 2 DAY)" +
                    " union" +
                    "(select e1.employee_name,d1.dealer_name , d2.distributor_name ,  s1.invoice_id ,s1.invoice_created_date, r1.region_name , a1.area_name , s1.payment_date, s1.amount " +
                    "from sales_master_table s1" +
                    "left join dealers_info d1 on s1.dealer_visited = d1.dealer_id" +
                    "left join distributors_info d2 on s1.distributor_visited = d2.distributor_id " +
                    "left join territory_master_table r1 on r1.region_code = s1.region" +
                    "left join area_master_table a1 on a1.area_code = s1.area" +
                    "left join employee_master_table e1 on e1.employee_id=s1.employee_id" +
                    "where " +
                    "s1.creation_date= DATE_FORMAT(sysdate(), '%Y-%m-%d')- INTERVAL 2 DAY" +
                    "and level1_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
                    "where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
                    "or level2_head = (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
                    "where e2.employee_id=s2.employee_id and s2.employee_id=?)" +
                    "or level3_head= (select distinct e2.employee_name from employee_master_table e2 , sales_master_table s2" +
                    "where e2.employee_id=s2.employee_id and s2.employee_id=?))";

            }

                 st=con.prepareStatement(sql);
                 HttpSession session = request.getSession();

                 String userid = (String)session.getAttribute("userid");

                 st.setString(1, userid);
                 st.setString(2, userid);
                 st.setString(3, userid);
                 st.setString(4, userid);
                rs =  st.executeQuery();
                table="<thead>" +
                        "<tr>" +
                        "<td>Dealer</td>" +
                        "<td>Distributor</td>" +
                        "<td>Region</td>" +
                        "<td>Area</td>" +
                        "<td>Invoice Date</td>" +
                        "<td>Payment Date</td>" +
                        "<td>Amount</td>" +
                        "</tr></thead><tbody>";

                while(rs.next())
                {   table+="<tr>";
                    table+="<td>"+rs.getString("Dealer_name")+"</td>";
                    table+="<td>"+rs.getString("distributor_name")+"</td>";
                    table+="<td>"+rs.getString("region_name")+"</td>";
                    table+="<td>"+rs.getString("area_name")+"</td>";
                    table+="<td>"+rs.getString("invoice_created_date")+"</td>";
                    table+="<td>"+rs.getString("payment_date")+"</td>";
                    table+="<td>"+rs.getString("amount")+"</td>";
                    table+="</tr>";
                }
                table+="</tbody>";
                response.getWriter().print(table);
                st.close();
                rs.close();
                close_connection();
            }

            catch(Exception e)
            {
                e.printStackTrace();
            }
        }

    }
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3 に答える 3

1

スペースを確認してください。SQLはそれについて厳密です。

また、コードをデバッグする方法を学ぶことをお勧めします。最も簡単な方法は、SQL をエコーし​​て、どのように表示されるかを確認することです。次に、エコーされた SQL をコピーし、ステートメントを準備している場合は値を追加し、サーバー (mysqlworkbench または phpmyadmin) で直接クエリを実行します。

于 2013-06-08T05:10:15.957 に答える
1

SQL クエリにスペースがありません。2 つの文字列が連結されている場合、スペースは挿入されないため、スペースがないため、mysql クエリは正確に記述したものではありません。

Sqlクエリを印刷してください..理解できます

于 2013-06-08T05:29:10.503 に答える