【发布时间】：2019-06-13 12:24:39
【问题描述】：
我正在尝试执行下面的代码。第一个 sql 查询给了我一些需要的 'IMSI' 编号，我将其存储在 's' 变量中，然后我用它来选择第二个和第三个选择查询。
当我排除第二个查询时，一切正常。此外，当我将“+s+”替换为 s 变量的值“21901123456456”时，代码成功完成。 但是当我执行如下代码时，我收到了来自主题的错误。
import java.sql.*;
import java.util.Scanner;
class stanjeBroja{
public static void main(String args[]){
Scanner reader = new Scanner(System.in);
System.out.println("Unesi MSISDN");
// get user input for min range
String min=reader.nextLine();
String s = "";
try{
//step1 load the driver class
Class.forName("oracle.jdbc.driver.OracleDriver");
//step2 create the connection object
Connection con=DriverManager.getConnection(
"jdbc:oracle:thin:@ip:port:sid","user","pass");
//step3 create the statement object
Statement stmt=con.createStatement();
//step4 execute query
ResultSet rs=stmt.executeQuery("SELECT
SUBSCRIBERKEY,ALTERNATESUBSCRIBERKEY FROM
TERTIOTEST.ALTERNATESUBSCRIBERKEY
WHERE ALTERNATESUBSCRIBERKEY ="+min+"");
while(rs.next()){
System.out.println("IMSI: "+rs.getString(1)+" MSISDN:
"+rs.getString(2)+" ");
s = rs.getString(1);
}
ResultSet rs1=stmt.executeQuery("SELECT servicename FROM
TERTIOTEST.SUBSCRIBERSERVICE WHERE SUBSCRIBERKEY = "+s+"AND servicename
IN
('STD','VPNNUM','HLR','VPNUNR','STDHYB','VOXX','VPNFA')");
while(rs1.next()){
System.out.println("SERVISI: "+rs1.getString(1)+" ");
}
ResultSet rs2=stmt.executeQuery("SELECT PARAMETERVALUE FROM
TERTIOTEST.SERVICEPARAMETER WHERE SUBSCRIBERKEY = "+s+"AND servicename =
'TARIFF' AND PARAMETERNAME = 'tariff'");
while(rs2.next()){
System.out.println("TARIFA: "+rs2.getString(1)+" ");
}
//step5 close the connection object
con.close();
}
catch(Exception e){
System.out.println(e);
}
}
}
【问题讨论】：
-
Please, please, please use bind variables instead of string concatenation，巧合的是，这会使错误对您显而易见。您在多个地方缺少
AND之前的空格。