黑猴子的家：JDBC -> PreparedStateme

1、创建 examstudent 表

DROP TABLE IF EXISTS `examstudent`;
CREATE TABLE `examstudent` (
  `FlowID` int(11) NOT NULL AUTO_INCREMENT,
  `Type` int(11) DEFAULT NULL,
  `IDCard` varchar(20) DEFAULT NULL,
  `ExamCard` varchar(20) DEFAULT NULL,
  `StudentName` varchar(20) DEFAULT NULL,
  `Location` varchar(20) DEFAULT NULL,
  `Grade` int(11) DEFAULT NULL,
  PRIMARY KEY (`FlowID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2、插入如下数据

FlowID	Type	IDCard	ExamCard	StudentName	Location	Grade
1	4	412824195263214584	200523164754000	张峰	郑州	85
2	4	412824195263214585	200523164754001	孙明	大连	66
3	6	412824195263214586	200523164754002	刘能	沈阳	56
4	6	412824195263214587	200523164754003	赵虎	哈尔滨	95
5	4	412824195263214588	200523164754004	杨丽	北京	64
6	4	412824195263214589	200523164754005	王小红	太原	77

3、插入一行数据

INSERT INTO `examstudent` VALUES (
'1', '4', '412824195263214584', '200523164754000', '张峰', '郑州', '85');

4、插入多行数据的两种方式

方式一

INSERT INTO examstudent (
FlowID,Type,IDCard,ExamCard,StudentName,Location,Grade)
VALUES 
('1', '4', '412824195263214584', '200523164754000', '张峰', '郑州', '85'),
('2', '4', '412824195263214585', '200523164754000', '刘能', '大连', '56'); 

方式二

INSERT INTO examstudent (FlowID,Type,IDCard,ExamCard,StudentName,Location,Grade)
SELECT '1', '4', '412824195263214584', '200523164754000', '张峰', '郑州', '84' UNION
SELECT '2', '5', '412824195263214585', '200523164754001', '刘能', '大连', '67' UNION
SELECT '3', '6', '412824195263214586', '200523164754002', '谢大脚', '哈尔滨', '48'

5、code

删改和增加数据的方式一样，就不在赘述

package com.yinggu.demo3;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.util.Scanner;
import org.junit.Test;
import com.yinggu.utils.JDBCUtils;

 * 使用PreparedStatement实现增删改查
 * @author:黑猴子的家
 * @博客 :https://www.jianshu.com/u/37fd8e2dff4c

public class TestPreparedStatement {
    Scanner input = new Scanner(System.in);
    @Test
    public void testInsert() {
        System.out.println("请输入考生的详细信息");
        System.out.print("Type:");
        int type = input.nextInt();
        System.out.print("IDCard:");
        String idCard = input.next();
        System.out.print("ExamCard:");
        String examCard = input.next();
        System.out.print("StudentName:");
        String studentName = input.next();
        System.out.print("location:");
        String location = input.next();
        System.out.print("Grade:");
        int grade = input.nextInt();
        Connection connection = null;
        PreparedStatement statement = null;
        // ------------------------以下为连接数据库的步骤-------------------
        try {
            // 1.获取连接
            connection = JDBCUtils.getConnection();
            // 2.访问数据库，执行操作
            statement = connection.prepareStatement(
                  "insert into examstudent values(null,?,?,?,?,?,?)");
            statement.setInt(1, type);
            statement.setString(2, idCard);
            statement.setString(3, examCard);
            statement.setString(4, studentName);
            statement.setString(5, location);
            statement.setInt(6, grade);
            int update = statement.executeUpdate();
            System.out.println(update > 0 ? "success" : "failure");
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try{
                JDBCUtils.closeConnection(null, statement, connection);
            }catch(Exception e){
                e.printStackTrace();
            }   
        }
    }
}