springboot+springm vc+mybatis实现增删改查案例!
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前言
最近这几天都在看关于springboot的内容,每天新会获得点新收获,并且都总结发在公众号中;最后经过不懈努力,不断查找相关网页,解决各种各样的问题,终于搭建出来了个新版的“S(springboot)S(springmvc)M(mybatis)框架”,下面是搭建步骤。
01
在idea中创建springboot项目
在idea编辑器中,点击File->New->Project->Spring Initializr->选择jdk版本为1.8,然后点击Next
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然后按照下图修改各个输入框的值,然后点击Next
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选择web,勾上spring web
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接下来选择sql,勾上对应的jdbc,mybaits和mysql driver,然后点击Next
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然后点击Finish,新建完的项目结构如下:
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到现在为止,一个崭新的springboot+Maven项目就搭建好了,接下来我们来配置一下pom.xml文件。
02
配置pom.xml文件
由于我们前端需要使用jsp来展示数据,所以pom.xml文件里面需要配置一个编译解析jsp页面的依赖,代码如下:
<!--用于解析jsp页面-->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jsp-api</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
在首页我这边需要用到jstl来展示数据,所以还需要导入jstl的相关依赖,如下所示:
<!--jstl相关依赖-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
03
编写application.properties文件
虽然springboot对配置文件简化了很多,但是必要的配置还是要有的, 那么这些配置就都放在了application.properties文件中,也有的项目中是application.yml文件,在这里我们以application.properties文件为例:
首先需要配置一下服务器的端口号,默认为8080,也可以改,代码如下:
#服务器端口号
server.port=8080
配置数据池:
#配置数据池
spring.datasource.url=jdbc:mysql://localhost:3306/schooldb
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
配置mybatis的别名:
#起别名
mybatis.type-aliases-package=com.xiongxiong.entity
配置日志信息:
#配置日志
logging.level.com.xiongxiong.dao = debug
logging.file.path=log/
logging.file.name=book.log
配置springmvc的内容
#配置springmvc的内容
#页面默认前缀配置
spring.mvc.view.prefix=/
#页面默认后缀配置
spring.mvc.view.suffix=.jsp
这是些基础的配置,如果还有其他扩展,可以自行添加配置信息。
04
搭建底层的三层架构(数据库脚本和结构在文末)
BookManage
在com.xiongxiong下面新建包entity,存放实体类BookManage,按照数据库表中的字段,对应写实体类的属性,最后getter和setter,代码如下:
package com.xiongxiong.entity;
import org.springframework.format.annotation.DateTimeFormat;
import java.util.Date;
public class BookManage {
private int bid;
private String bname;
private String bauthor;
@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date btime;
private int btype;
public int getBid() {
return bid;
}
public void setBid(int bid) {
this.bid = bid;
}
public String getBname() {
return bname;
}
public void setBname(String bname) {
this.bname = bname;
}
public String getBauthor() {
return bauthor;
}
public void setBauthor(String bauthor) {
this.bauthor = bauthor;
}
public Date getBtime() {
return btime;
}
public void setBtime(Date btime) {
this.btime = btime;
}
public int getBtype() {
return btype;
}
public void setBtype(int btype) {
this.btype = btype;
}
}
BookManageMapper
在com.xiongxiong中新建包dao,在该包中创建接口BookManageMapper,分别编写增删改以及查询全部和根据编号查询的接口。
package com.xiongxiong.dao;
import com.xiongxiong.entity.BookManage;
import org.apache.ibatis.annotations.*;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.List;
@Mapper //证明是mybatis的mapper文件
@Repository //证明这是dao层
public interface BookManageMapper {
@Select("select * from BookManage;")
//查询全部
List<BookManage> findBookAll();
@Insert("insert into bookmanage (bname,bauthor,btime,btype) value(#{bname},#{bauthor},#{btime},#{btype});")
//添加
int addBook(BookManage bookManage);
@Delete("delete from BookManage where bid = #{bid};")
//删除
int delBook(int bid);
@Update("update bookmanage set bname=#{bname},bauthor=#{bauthor},btime=#{btime},btype=#{btype} where bid = #{bid}")
//修改
int updateBook(BookManage bookManage);
@Select("select * from bookmanage where bid = #{bid}")
//根据编号查询编号
BookManage findBookById(int bid);
}
需要注意的是,由于我们统一都使用注解的方式,所以不用在编写SQL映射文件(mapper),所有的sql语句通过注解方式实现,详情请看代码,各个功能都有相应的注释。
IBookManageService和BookManageServiceImpl
同样,在com.xiongxiong包下面创建service包存放业务的接口,在service包下面新建impl包,存放的是业务接口的实现类,代码如下:
IBookManageService
package com.xiongxiong.service;
import com.xiongxiong.entity.BookManage;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import java.util.List;
public interface IBookManageService {
//查询全部
List<BookManage> findBookAll();
//添加
int addBook(BookManage bookManage);
//删除
int delBook(int bid);
//修改
int updateBook(BookManage bookManage);
//根据编号查询编号
BookManage findBookById(int bid);
}
BookManageServiceImpl
package com.xiongxiong.service.impl;
import com.xiongxiong.dao.BookManageMapper;
import com.xiongxiong.entity.BookManage;
import com.xiongxiong.service.IBookManageService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
@EnableTransactionManagement //开启事务管理器
@Transactional //配置事务
@Service //证明这是一个service层
public class BookManageServiceImpl implements IBookManageService {
//Dao层的接口
@Autowired
BookManageMapper bookManageMapper;
@Override
public List<BookManage> findBookAll() {
return bookManageMapper.findBookAll();
}
@Override
public int addBook(BookManage bookManage) {
return bookManageMapper.addBook(bookManage);
}
@Override
public int delBook(int bid) {
return bookManageMapper.delBook(bid);
}
@Override
public int updateBook(BookManage bookManage) {
return bookManageMapper.updateBook(bookManage);
}
@Override
public BookManage findBookById(int bid) {
return bookManageMapper.findBookById(bid);
}
}
需要注意的是,在实现类中,需要添加开启事务 @EnableTransactionManagement和配置事务 @Transactional的注解。
在com.xiongxiong下面创建包web,该包中放控制器,在控制器中实现增删改查的功能以及页面之间的跳转,代码如下:
package com.xiongxiong.web;
import com.xiongxiong.entity.BookManage;
import com.xiongxiong.service.IBookManageService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
@Controller
public class IndexController {
//创建Service的对象
@Autowired
private IBookManageService bookManageService;
//默认进入首页
@RequestMapping("default")
public String index(Model model) {
List<BookManage> bookManageList =
bookManageService.findBookAll();
model.addAttribute("bookManageList",bookManageList);
return "index";
}
//删除
@RequestMapping("delBook")
public String delBook(Model model, int bid) {
bookManageService.delBook(bid);
index(model);
return "index";
}
//添加
@RequestMapping("addBook")
public String addBook(BookManage bookManage, Model model) {
bookManageService.addBook(bookManage);
index(model);
return "index";
}
//跳转到添加的页面
@RequestMapping("add")
public String add() {
return "addBook";
}
}
05
创建jsp页面
在main下面新建文件夹webapp,在该文件夹中新建jsp页面就可以,其中我还用到了jquery(下面有下载链接)的环境,放在js目录下面,目录结构如下所示:
jquery-1.12.4.js:点此下载
bootstrap.js:点此下载
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创建index.jsp,用来展示查询展示所有数据,查询的功能在控制器IndexController中实现的,下面是代码:
<%--
Created by IntelliJ IDEA.
User: 24519
Date: 2021/1/20
Time: 10:38
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="f" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
<title>首页</title>
</head>
<body>
<h1>图书信息</h1>
<table border="1">
<tr>
<td>图书名称</td>
<td>图书作者</td>
<td>购买时间</td>
<td>图书分类</td>
<td>操作</td>
</tr>
<c:forEach items="${bookManageList}" var="book">
<tr>
<td>${book.bname}</td>
<td>${book.bauthor}</td>
<td>
<f:formatDate value="${book.btime}" pattern="yyyy-MM-dd"></f:formatDate>
</td>
<td>
<c:if test="${book.btype==1}">
计算机/软件
</c:if>
<c:if test="${book.btype==2}">
小说/文摘
</c:if>
<c:if test="${book.btype==3}">
杂项
</c:if>
</td>
<td><a href="delBook?bid=${book.bid}">删除</a></td>
</tr>
</c:forEach>
</table>
<a href="addBook.jsp" style="color:red">新增图书信息</a>
<script src="js/jquery-1.12.4.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$("tr:even").css("background", "green");
$("tr:first").css("background", "blue");
});
</script>
</body>
</html>
创建添加信息的jsp页面addBook.jsp,主要用来添加信息,添加的功能在控制器IndexController中实现,还实现了必要的表单验证,下面是代码:
<%--
Created by IntelliJ IDEA.
User: 24519
Date: 2021/1/20
Time: 11:35
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>新增图书信息</h1>
<form action="addBook" method="post">
图书名称:<input type="text" name="bname"/><br/>
图书作者:<input type="text" name="bauthor"/><br/>
购买日期:<input type="text" name="btime"/><br/>
图书类别:
<select name="btype">
<option value="0">选择所属分类</option>
<option value="1">计算机/软件</option>
<option value="2">小说/文摘</option>
<option value="3">杂项</option>
</select><br/>
<input type="submit" value="增加图书"/>
</form>
<script src="js/jquery-1.12.4.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$("input[type='submit']").click(function () {
var bname = $("input[name='bname']").val();
var bauthor = $("input[name='bauthor']").val();
var btime = $("input[name='btime']").val();
var btype = $("input[name='btype']").val();
if (bname == "") {
alert("图书名称不能为空");
return false;
}
if (bauthor == "") {
alert("图书作者不能为空");
return false;
}
var dateinfo = /^[0-9]{4}-[0-1]{1}[0-9]{1}-[0-3]{1}[0-9]{1}/;
if (!dateinfo.test(btime)) {
alert("日期格式不正确");
return false;
}
if (btype == 0) {
alert("图书分类需要选择");
return false;
}
});
});
</script>
</body>
</html>
然后启动,运行,运行结果如下:
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控制台日志如下:
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日志文件book.log:
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数据库脚本:
/*
SQLyog Professional v12.08 (32 bit)
MySQL - 5.5.27 : Database - schooldb
*********************************************************************
*/
/*!40101 SET NAMES utf8 */;
/*!40101 SET SQL_MODE=''*/;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
CREATE DATABASE /*!32312 IF NOT EXISTS*/`schooldb` /*!40100 DEFAULT CHARACTER SET utf8 */;
USE `schooldb`;
/*Table structure for table `bookmanage` */
DROP TABLE IF EXISTS `bookmanage`;
CREATE TABLE `bookmanage` (
`bid` int(11) NOT NULL AUTO_INCREMENT,
`bname` varchar(40) NOT NULL,
`bauthor` varchar(40) NOT NULL,
`btime` datetime NOT NULL,
`btype` int(11) NOT NULL,
PRIMARY KEY (`bid`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
/*Data for the table `bookmanage` */
insert into `bookmanage`(`bid`,`bname`,`bauthor`,`btime`,`btype`) values (1,'三国演义','罗贯中','2021-09-08 00:00:00',2),(2,'水浒传','施耐庵','2021-09-08 00:00:00',2),(3,'狂人日记','魯迅','2021-09-08 00:00:00',3),(5,'永乐大典','鲁迅','2020-09-08 00:00:00',2);
/*Table structure for table `dept` */
DROP TABLE IF EXISTS `dept`;
CREATE TABLE `dept` (
`did` int(11) NOT NULL AUTO_INCREMENT,
`dname` varchar(50) DEFAULT NULL,
PRIMARY KEY (`did`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
/*Data for the table `dept` */
insert into `dept`(`did`,`dname`) values (1,'测试部'),(2,'销售部'),(3,'服务部'),(4,'开发部'),(5,'运营部');
/*Table structure for table `dog` */
DROP TABLE IF EXISTS `dog`;
CREATE TABLE `dog` (
`did` int(11) NOT NULL AUTO_INCREMENT,
`dname` varchar(50) DEFAULT NULL,
`dpass` varchar(50) DEFAULT NULL,
PRIMARY KEY (`did`)
) ENGINE=InnoDB AUTO_INCREMENT=1785770044 DEFAULT CHARSET=utf8;
/*Data for the table `dog` */
insert into `dog`(`did`,`dname`,`dpass`) values (1,'111','111'),(2,'旺财','123'),(3,'幸福','111'),(4,'财旺','123'),(5,'进钱','111'),(6,'富贵','123'),(1785770043,'黑虎','123');
/*Table structure for table `emp` */
DROP TABLE IF EXISTS `emp`;
CREATE TABLE `emp` (
`eid` int(11) NOT NULL AUTO_INCREMENT COMMENT '编号',
`ename` varchar(50) DEFAULT NULL COMMENT '姓名',
`epass` varchar(50) DEFAULT NULL COMMENT '密码',
`edid` int(11) DEFAULT NULL COMMENT '所在部门编号',
PRIMARY KEY (`eid`),
KEY `fk_deptid` (`edid`),
CONSTRAINT `fk_deptid` FOREIGN KEY (`edid`) REFERENCES `dept` (`did`)
) ENGINE=InnoDB AUTO_INCREMENT=38 DEFAULT CHARSET=utf8;
/*Data for the table `emp` */
insert into `emp`(`eid`,`ename`,`epass`,`edid`) values (1,'王伟','111',1),(2,'张王','111',1),(4,'张三','111',4),(6,'张方仪','111',1),(7,'张坤鹏','111',1),(9,'翟选浩','123',1),(10,'季淑琦','111',1),(11,'袁康凯','111',1),(12,'丁长琨','111',1),(33,'老赵','123',1),(34,'老王','123',1),(35,'老李','123',1),(36,'小贼','123',1),(37,'老8','123',1);
/*Table structure for table `financingproduct` */
DROP TABLE IF EXISTS `financingproduct`;
CREATE TABLE `financingproduct` (
`id` varchar(10) NOT NULL,
`Risk` int(11) NOT NULL,
`Income` varchar(10) NOT NULL,
`SaleStarting` datetime NOT NULL,
`SaleEnd` datetime DEFAULT NULL,
`End` datetime DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
/*Data for the table `financingproduct` */
insert into `financingproduct`(`id`,`Risk`,`Income`,`SaleStarting`,`SaleEnd`,`End`) values ('1',1,'5.68%','2020-04-09 00:00:00','2021-05-09 00:00:00','2029-09-08 00:00:00'),('2',3,'5.68%','2020-04-09 00:00:00','2021-05-09 00:00:00','2029-09-08 00:00:00'),('3',2,'5.3%','2020-04-09 00:00:00','2021-05-09 00:00:00','2029-09-08 00:00:00'),('4',2,'6.8%','2020-04-09 00:00:00','2021-05-09 00:00:00','2029-09-08 00:00:00'),('5',1,'4.98%','2020-04-09 00:00:00','2021-05-09 00:00:00','2029-09-08 00:00:00');
/*Table structure for table `student` */
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
`sid` int(11) NOT NULL AUTO_INCREMENT,
`sname` varchar(50) DEFAULT NULL,
`sphone` varchar(50) DEFAULT NULL,
`spass` varchar(50) DEFAULT NULL,
`saddress` varchar(50) DEFAULT NULL,
`sage` int(11) DEFAULT NULL,
PRIMARY KEY (`sid`)
) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8;
/*Data for the table `student` */
insert into `student`(`sid`,`sname`,`sphone`,`spass`,`saddress`,`sage`) values (1,'张三','15066675713','111','普通',11),(2,'李四','15066675713','222','普通',20),(3,'admin','15066675713','333','管理员',66),(4,'test','15066675713','111','普通',20),(5,'张先生','150','111','普通',12),(6,'张先生','150','111','普通',12),(7,'张先生','150','111','普通',12),(8,'张先生','150','111','普通',12),(9,'张先生','150','111','普通',12),(10,'张先生','150','111','普通',12),(11,'张先生','150','111','普通',12),(12,'张先生','150','111','普通',12),(13,'张先生','150','111','济南',12),(14,'张先生','150','111','普通',12),(15,'张先生','150','111','普通',12),(16,'张先生','150','111','普通',12),(17,'张先生','150','111','普通',12),(18,'张先生','150','111','普通',12),(19,'张先生','150','111','普通',12),(20,'李先生','160','111','普通',13);
/*Table structure for table `teacher` */
DROP TABLE IF EXISTS `teacher`;
CREATE TABLE `teacher` (
`tid` int(11) NOT NULL AUTO_INCREMENT,
`tname` varchar(50) DEFAULT NULL,
`tpass` varchar(50) DEFAULT NULL,
`tage` int(11) DEFAULT NULL,
`tjob` varchar(50) DEFAULT NULL,
PRIMARY KEY (`tid`)
) ENGINE=InnoDB AUTO_INCREMENT=805760409 DEFAULT CHARSET=utf8;
/*Data for the table `teacher` */
insert into `teacher`(`tid`,`tname`,`tpass`,`tage`,`tjob`) values (1,'张老师','123',25,'数学'),(2,'王老师','123',36,'语文'),(3,'马老师','123',90,'武术'),(4,'高老师','123',32,'外语'),(5,'赵老师','123',24,'体育'),(6,'钱老师','123',36,'未安排'),(7,'钱老师','123',36,'未安排'),(8,'钱老师','123',36,'未安排'),(9,'钱老师','123',36,'未安排'),(10,'钱老师','123',36,'未安排'),(11,'钱老师','123',36,'未安排'),(12,'钱老师','123',36,'未安排'),(13,'钱老师','123',36,'未安排'),(14,'钱老师','123',36,'未安排'),(15,'钱老师','123',36,'未安排'),(16,'钱老师','123',36,'未安排'),(17,'钱老师','123',36,'未安排'),(805760404,'路老师','123',56,'忽悠学'),(805760405,'路老师','123',56,'忽悠学'),(805760406,'翟老师','123456',56,'化学'),(805760407,'贾老师','123456',56,'物理'),(805760408,'潘老师','123456',56,'金融学');
/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
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