Question

我发现这样一个被误解了：
CallableStatement测试函数有效（ TestCallableIn ）。当我尝试将CallableStatement转换为批处理（ TestCallableBatchProcessing ）时，我无法执行while循环，导致

   option = scanner.nextLine();

没有收到输入 - 此外 - 该类没有得到任何输入数据只是走出循环。

你知道可能出现什么问题吗？

console dialog

TestCallableBatchProcessing

package com.pluralsight.testingJDBC;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Date;
import java.util.Scanner;

public class TestCallableBatchProcessing {
  public static void main(String[] args) {
    try (
            Connection conn = DBUtil.getConnection(DBType.ORADB);
            CallableStatement callableStatement = conn.prepareCall("{call AddNewEmployee(?,?,?,?,?)}");
            )
    {
        String option;
        do {
            Scanner scanner = new Scanner(System.in);
            System.out.print("Enter Employee # : ");
            int empno = Integer.parseInt(scanner.nextLine());
            System.out.print("Enter Employee Name : ");
            String ename = scanner.nextLine();
            System.out.print("Enter Email :");
            String email = scanner.nextLine();
            System.out.print("Enter Hiredate : ");
            Date doj = java.sql.Date.valueOf(scanner.nextLine());
            System.out.print("Enter Salary : ");
            double salary = scanner.nextDouble();

            callableStatement.setInt(1, empno);
            callableStatement.setString(2, ename);
            callableStatement.setString(3, email);
            callableStatement.setDate(4, (java.sql.Date) doj);
            callableStatement.setDouble(5, salary);

            callableStatement.addBatch();
            System.out.println("Do you want to add another record (yes/no) :");
            option = scanner.nextLine();
        } while ( option.equalsIgnoreCase("yes"));

        int []updateCounts = callableStatement.executeBatch();
        System.out.println("You have inserted : " + updateCounts.length + " records.");
    } catch (SQLException ex) {
        DBUtil.showErrorMessage(ex);
    }
  }
}

TestCallableIn：

package com.pluralsight.testingJDBC;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Date;
import java.util.Scanner;

public class TestCallableIn {
  public static void main(String[] args) {
    try(
            Connection conn = DBUtil.getConnection(DBType.ORADB);
            CallableStatement callableStatement = conn.prepareCall("{call AddNewEmployee(?,?,?,?,?)}");
            )
    {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter Employee # : ");
        int empno = Integer.parseInt(scanner.nextLine());
        System.out.print("Enter Employee Name : ");
        String ename = scanner.nextLine();
        System.out.print("Enter Email ID :");
        String email = scanner.nextLine();
        System.out.print("Enter Hiredate : ");
        Date doj = java.sql.Date.valueOf(scanner.nextLine());
        System.out.print("Enter Salary : ");
        double salary = scanner.nextDouble();

        callableStatement.setInt(1, empno);
        callableStatement.setString(2, ename);
        callableStatement.setString(3, email);
        callableStatement.setDate(4, (java.sql.Date) doj);
        callableStatement.setDouble(5, salary);

        callableStatement.execute();
        System.out.println("Employee Record Added Successfully.");
    } catch (SQLException ex) {
        DBUtil.showErrorMessage(ex);
    }
  }
}

在“CallableStatemenet.addBatch（）”之后没有执行“scanner.nextline（）”

0 个答案: