SSM_BookSystem SSM框架基础

SSM_BookSystem ---> Hello CRUD

说明:本项目目前包含基础的CRUD

日期:2017-05-01 22:25:37

作者:hisenyuan

网站:hisen.me

源码:https://github.com/hisenyuan/SSM_BookSystem (最新更新会在此处

预览:




搭建过程:

一般idea创建工程的过程

打开idea ---> File ---> new ---> project ---> maven --->

create from archetype ---> maven-archetype-webapp ---> 接下来一般默认即可

最后在main目录下新建java文件夹,并且mark as source root。

首先创建如下的目录结构即可:

├── java
│   └── com
│   └── hisen
│   ├── dao
│   │   └── BookDao.java
│   ├── entity
│   │   └── Book.java
│   ├── service
│   │   ├── BookService.java
│   │   └── impl
│   │   └── BookServiceImpl.java
│   └── web
│   └── BookController.java
├── resources
│   ├── jdbc.properties
│   ├── logback.xml
│   ├── mapper
│   │   └── BookMapper.xml
│   ├── mybatis-config.xml
│   └── spring
│   ├── spring-dao.xml
│   ├── spring-service.xml
│   └── spring-web.xml
└── webapp
├── index.jsp
└── WEB-INF
├── jsp
│   ├── detail.jsp
│   └── list.jsp
└── web.xml

第一步:添加Spring、Spring MVC、Mybatis的依赖

都配有详细的说明,这里不再重复

详情请看pom.xml

第二步:添加数据库配置文件

├── resources
│ ├── jdbc.properties

创建数据库配置文件,内容如下

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/booksystem?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=hisen

这里需要创建一个数据库,名为:booksystem

建表语句如下:

CREATE TABLE `book` (
`book_id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '图书ID',
`name` varchar(100) NOT NULL COMMENT '图书名称',
`number` int(11) NOT NULL COMMENT '图书数量',
`detail` varchar(200) NOT NULL COMMENT '图书描述',
PRIMARY KEY (`book_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 COMMENT='图书表'

表结构如下:

+---------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+--------------+------+-----+---------+----------------+
| book_id | bigint(20) | NO | PRI | NULL | auto_increment |
| name | varchar(100) | NO | | NULL | |
| number | int(11) | NO | | NULL | |
| detail | varchar(200) | NO | | NULL | |
+---------+--------------+------+-----+---------+----------------+

第三步:添加mybatis配置文件

├── resources
│ ├── mybatis-config.xml

在resources目录下新建文件:mybatis-config.xml

内容如下:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 配置全局属性 -->
<settings>
<!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->
<setting name="useGeneratedKeys" value="true" />
<!-- 使用列别名替换列名 默认:true -->
<setting name="useColumnLabel" value="true" />
<!-- 开启驼峰命名转换:Table{create_time} -> Entity{createTime} -->
<setting name="mapUnderscoreToCamelCase" value="true" />
</settings>
</configuration>

第四步:添加Spring配置文件

在resources/spring目录下新建三个文件:

│   └── spring
│ ├── spring-dao.xml
│ ├── spring-service.xml
│ └── spring-web.xml

详细内容详见:resources/spring/

第五步:添加logback配置文件

logback配置比log4j要简单点,功能类似

├── resources
│ ├── logback.xml

在resources文件夹下新建文件:logback.xml

<?xml version="1.0" encoding="UTF-8" ?>
<configuration debug="true">
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<!--开启debug日志模式,在控制台打印日志-->
<root level="debug">
<appender-ref ref="STDOUT" />
</root>
</configuration>

第六步:创建DAO、entity

如下两个文件:BookDao.java、Book.java

│   └── com
│   └── hisen
│   ├── dao
│   │   └── BookDao.java
│   ├── entity
│   │   └── Book.java

详细内容:BookDao.java

详细内容:Book.java

创建测试类:

  1. 测试基类:查看代码BaseTest.java
  2. BookDao:查看代码BookDaoTest.java
  3. 测试:addBook (由于没有预先准备数据,所以就先添加)
20:12:26.674 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@7b7fdc8] will not be managed by Spring
20:12:26.709 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.777 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着0(String), 100(Integer), 描述0(String)
20:12:26.783 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.791 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6f3187b0]
20:12:26.792 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.793 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@a307a8c] was not registered for synchronization because synchronization is not active
20:12:26.793 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@2b9ed6da] will not be managed by Spring
20:12:26.793 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.794 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着1(String), 101(Integer), 描述1(String)
20:12:26.798 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.798 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@a307a8c]
20:12:26.798 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.799 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4b34fff9] was not registered for synchronization because synchronization is not active
20:12:26.799 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@127a7a2e] will not be managed by Spring
20:12:26.799 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.799 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着2(String), 102(Integer), 描述2(String)
20:12:26.804 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.804 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4b34fff9]
20:12:26.805 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.805 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@518caac3] was not registered for synchronization because synchronization is not active
20:12:26.805 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@4f74980d] will not be managed by Spring
20:12:26.805 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.805 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着3(String), 103(Integer), 描述3(String)
20:12:26.810 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.811 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@518caac3]
20:12:26.811 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.811 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1722011b] was not registered for synchronization because synchronization is not active
20:12:26.811 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@5b3f61ff] will not be managed by Spring
20:12:26.811 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.812 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着4(String), 104(Integer), 描述4(String)
20:12:26.816 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.817 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1722011b]
20:12:26.817 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.817 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6a47b187] was not registered for synchronization because synchronization is not active
20:12:26.817 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@1ef6d34c] will not be managed by Spring
20:12:26.817 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.818 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着5(String), 105(Integer), 描述5(String)
20:12:26.822 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.823 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6a47b187]
20:12:26.823 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.823 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6fa34d52] was not registered for synchronization because synchronization is not active
20:12:26.824 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@616ac46a] will not be managed by Spring
20:12:26.825 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.825 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着6(String), 106(Integer), 描述6(String)
20:12:26.830 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.830 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6fa34d52]
20:12:26.830 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.830 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1d483de4] was not registered for synchronization because synchronization is not active
20:12:26.831 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@28d18df5] will not be managed by Spring
20:12:26.831 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.832 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着7(String), 107(Integer), 描述7(String)
20:12:26.836 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.836 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@1d483de4]
20:12:26.836 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.836 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2b175c00] was not registered for synchronization because synchronization is not active
20:12:26.836 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@1ae8bcbc] will not be managed by Spring
20:12:26.836 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.837 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着8(String), 108(Integer), 描述8(String)
20:12:26.842 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.842 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2b175c00]
20:12:26.843 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
20:12:26.843 [main] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@35399441] was not registered for synchronization because synchronization is not active
20:12:26.843 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@6304101a] will not be managed by Spring
20:12:26.843 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Preparing: INSERT INTO book(`book_id`, `name`, `number`,`detail`) VALUES(?, ?, ?, ?)
20:12:26.843 [main] DEBUG com.hisen.dao.BookDao.addBook - ==> Parameters: 0(Long), 活着9(String), 109(Integer), 描述9(String)
20:12:26.848 [main] DEBUG com.hisen.dao.BookDao.addBook - <== Updates: 1
20:12:26.848 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@35399441]
  1. 测试:queryById
20:15:03.947 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@7fc4780b] will not be managed by Spring
20:15:03.972 [main] DEBUG com.hisen.dao.BookDao.queryById - ==> Preparing: SELECT book_id, name, number, detail FROM book WHERE book_id = ?
20:15:04.047 [main] DEBUG com.hisen.dao.BookDao.queryById - ==> Parameters: 101(Long)
20:15:04.076 [main] DEBUG com.hisen.dao.BookDao.queryById - <== Total: 1
20:15:04.088 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6f3187b0]
Book{bookId=101, name='活着0', number=100, detail='描述0'}

以此类推,就不多写了

第七步:创建mybatis mapper文件

在resources/mapper/目录下创建:resources/mapper/BookMapper.xml

在mapper文件中需要用到第六步的内容

第八步:创建service

├── service
│   ├── BookService.java
│   └── impl
│   └── BookServiceImpl.java

具体内容:service

  1. 创建测试类:BookServiceImplTest
  2. BookServiceImplTest:查看代码BookServiceImplTest.java
  3. 测试:getById
20:19:58.871 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@37fb0bed] will not be managed by Spring
20:19:58.885 [main] DEBUG com.hisen.dao.BookDao.queryById - ==> Preparing: SELECT book_id, name, number, detail FROM book WHERE book_id = ?
20:19:58.974 [main] DEBUG com.hisen.dao.BookDao.queryById - ==> Parameters: 101(Long)
20:19:59.004 [main] DEBUG com.hisen.dao.BookDao.queryById - <== Total: 1
20:19:59.011 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2bec854f]
Book{bookId=101, name='活着0', number=100, detail='描述0'}

第九步:创建controller

└── web
└── BookController.java

具体内容:BookController.java

第十步:创建jsp页面以及配置web.xml

页面主要使用了bootstrap

└── webapp
├── index.jsp
└── WEB-INF
├── jsp
│ ├── detail.jsp
│ └── list.jsp
└── web.xml

具体内容:查看具体内容

SSM简明教程:简单的十步教你搭建人生第一个SSM框架[ SSM框架整合教程(Spring+SpringMVC+MyBatis) ]的更多相关文章

  1. SSM框架+Plupload实现断点续传(Spring+SpringMVC+MyBatis+Plupload)

    关于Plupload的介绍,相信它的官网http://www.plupload.com/已经给得很详细了.Plupload的上传原理简单点说,就是将用户选中的文件(可多个)分隔成一个个小块,依次向服务 ...

  2. ssm整合(Spring+SpringMVC+Mybatis)

    一.Spring Spring致力于提供一种方法管理你的业务对象.IOC容器,它可以装载bean(也就是我们java中的类,当然也包括service dao里面的),有了这个机制,我们就不用在每次使用 ...

  3. SSM框架整合(Spring+SpringMVC+MyBatis+Oracle)

    1.开发环境搭建以及创建Maven Web项目 参看之前的博文[确保maven web项目不报错]:http://www.cnblogs.com/cainiaomahua/p/6306476.html ...

  4. SSM框架整合(Spring + SpringMVC + MyBatis)

    搭建环境 使用Spring(业务层)整合其他的框架SpringMVC(表现层)和MyBatis(持久层) Spring框架 创建数据库表 CREATE DATABASE ssm; USE ssm; C ...

  5. SpringMVC入门二:SSM整合(spring+springmvc+mybatis)

    一.编程步骤 1.引入依赖 spring.springmvc.mybatis.mybatis-spring.mysql.druid.log4j.servlet-api.jstl.fastjson 2. ...

  6. 【Web】十步教你搭建完整免费的个人网站(花生壳+XAMPP+WordPress)

    1.从花生壳官网(http://www.oray.com/peanuthull/download.php)下载最新版本的客户端. 下载完成后安装,注册护照(需手机验证码验证),注册完成后获取免费域名并 ...

  7. SSM框架整合(注解)-Spring+SpringMVC+MyBatis+MySql

    准备工作: 下载整合所需的jar包 点击此处下载 使用MyBatis Generator生成dao接口.映射文件和实体类 如何生成 搭建过程: 先来看一下项目的 目录结构 1.配置dispatcher ...

  8. SSM三大框架整合(Spring+SpringMVC+MyBatis)

    一. 导包 18个必须的包 二.配置Spring MVC的web文件 <?xml version="1.0" encoding="UTF-8"?> ...

  9. SSM 框架-06-详细整合教程(IDEA版)(Spring+SpringMVC+MyBatis)

    SSM 框架-06-详细整合教程(IDEA版)(Spring+SpringMVC+MyBatis) SSM(Spring.Spring MVC和Mybatis)如果你使用的是 Eclipse,请查看: ...

随机推荐

  1. RabbitMQ系列教程之七:RabbitMQ的 C# 客户端 API 的简介

    今天这篇博文是我翻译的RabbitMQ的最后一篇文章了,介绍一下RabbitMQ的C#开发的接口.好了,言归正传吧. Net/C# 客户端 API简介1.主要的命名空间,接口和类  定义核心的API的 ...

  2. vue+webpack项目实际工作中需要生成一个配置文件供生产环境使用

    大家都知道webpack打包十分方便,但是在工作中,前端写好的项目需要后端进行部署,就需要有一个配置文件. 使用插件 :  GenerateAssetPlugin , 使用方法 : 1  在项目中安装 ...

  3. 关于delete使用limit的一些注意事项

    在使用delete删除记录时,如果表里面存在多条相同的记录,但是此刻你只想删除一条记录,那么limit就派上了用场.但是使用limit的时候得注意: 如图,您如果想着删除第一个名字叫做张三的,如果你这 ...

  4. ES6关于Unicode的相关扩展

    前面的话 字符串是编程中重要的数据类型,只有熟练掌握字符串操作才能更高效地开发程序.JS中的字符串String类型是由引号括起来的一组由16位Unicode字符组成的字符序列.在过去,16位足以包含任 ...

  5. 如何在Shell中快速切换目录

    1.回到上一次进入的路经cd -2.回到Homecd ~3.自动补齐实例,cd /usr/src/redhat,可以用cd /u[TAB]s[TAB]r[TAB]4.!$ 表示上一个命令的最后一个参数 ...

  6. Actor模型原理

    1.Actor模型 在使用Java进行并发编程时需要特别的关注锁和内存原子性等一系列线程问题,而Actor模型内部的状态由它自己维护即它内部数据只能由它自己修改(通过消息传递来进行状态修改),所以使用 ...

  7. 机器学习 —— 基础整理(四)特征提取之线性方法:主成分分析PCA、独立成分分析ICA、线性判别分析LDA

    本文简单整理了以下内容: (一)维数灾难 (二)特征提取--线性方法 1. 主成分分析PCA 2. 独立成分分析ICA 3. 线性判别分析LDA (一)维数灾难(Curse of dimensiona ...

  8. python有三种导入模块的方法(转)

    原文:http://www.cnblogs.com/allenblogs/archive/2011/11/15/2055149.html python有三种导入模块的方法 其一, import mod ...

  9. 结合bootstrap fileinput插件和Bootstrap-table表格插件,实现文件上传、预览、提交的导入Excel数据操作流程

    1.bootstrap-fileinpu的简单介绍 在前面的随笔,我介绍了Bootstrap-table表格插件的具体项目应用过程,本篇随笔介绍另外一个Bootstrap FieInput插件的使用, ...

  10. sql 日记

    --4.选择雇用时间在1998-02-01到1998-05-01之间的员工姓名,job_id和雇用时间select last_name,job_id,hire_datefrom employeeswh ...