jdbc：前端java，后端Oracle 10g速成版

Question

我想寻求帮助。我无法将Java连接到Oracle 10g Express Edition。我已经尝试解决此问题大约3天了。我已经将我的javac和java降级到1.8，因为它是youtube上唯一的有关如何解决此问题的教程，但仍然无法正常工作。我的程序确实编译了，当我尝试运行它时，终端显示“ java.sql.SQLException: ORA-00911: invalid character”。我正在使用java.swing而不是javafx。拜托，帮我这个新手，谢谢！

import java.sql.*;  
class OracleCon{  
public static void main(String args[]){  
try{  

Class.forName("oracle.jdbc.driver.OracleDriver");  


Connection con=DriverManager.getConnection( "jdbc:oracle:thin:@localhost:1521:xe","customer","customer");  


Statement stmt=con.createStatement();  


ResultSet rs=stmt.executeQuery("select * from customer;");  
while(rs.next())  
System.out.println(rs.getInt(1)+"  "+rs.getString(2)+"  "+rs.getString(3));  


con.close();  

}catch(Exception e){ System.out.println(e);}  

}  
}  

Answer 1

请从SQL中删除分号：

select * from customer" instead of "select * from customer;"

Answer 2

请您试试这个

ResultSet rs=stmt.executeQuery("select * from customer");  
while(rs.next())  
System.out.println(rs.getInt(1)+"  "+rs.getString("2")+"  ");  
//1  I removed from your code `rs.getString(3)` and `rs.getString(2)`
//2  You can add string as rs.getString("3"), `rs.getString("2")` like this 
//3 my suggestion is you first remove rs.getString(3) and run