java.sql.SQLException : statement is not executing

Question

我正在尝试创建一个简单的 SQLite 数据库程序，它可以创建数据库、表、插入和检索数据。我怎样才能解决这个问题？我不断收到异常:

java.sql.SQLException: statement is not executing

package databaseproj;

import java.sql.*;

public class main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        try{
            String sDriverName = "org.sqlite.JDBC";
            Class.forName(sDriverName);
            String dbURL= "jdbc:sqlite:hello.db";

            Connection conn= DriverManager.getConnection(dbURL);
            Statement st= conn.createStatement();

            String createtable="CREATE TABLE contacts(name text, number numeric, email text)";
            System.out.println("Table created successfully");
            String insertcontacts="INSERT INTO contacts(name, number, email) VALUES('nduka',08166459353,'ndukaude')";

            st.executeUpdate(createtable);
            st.executeUpdate(insertcontacts);
            System.out.println("Insert complete");

            ResultSet rs= st.getResultSet(); 

            conn.setAutoCommit(false);
            while ( rs.next() ){
                String name= rs.getString("name");
                int num=rs.getInt("number");
                String email=rs.getString("email");

                System.out.println("NAME: "+name);
                System.out.println("NUMBER: "+ num);
                System.out.println("EMAIL: "+email);
            }

            conn.commit();
            conn=null;
            System.out.println("connection emptied");
            rs.close();

            st.close();

            conn.close();
            System.out.println("connection closed");
        }

        catch ( Exception e ) {
            System.err.println( e.getClass().getName() + ": " + e.getMessage() );
            System.exit(0);
        }
    }
}

Answer 1

使用execute(createtable)代替executeUpdate(createtable)