我的项目环境
- IDEA 2022
- Mysql 8.0.29
- Tomcat 9
- Maven 3.8.6
创建数据库表(在ssmbuid数据库里)
CREATE TABLE books (
bookID int NOT NULL AUTO_INCREMENT,
bookName varchar(100) NOT NULL,
bookCounts int NOT NULL,
details varchar(200) NOT NULL,
PRIMARY KEY (bookID)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb3;
INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');
项目环境搭建
1.创建普通Maven项目ssmBuild-test
2.在项目的pom.xml文件里面导入相关依赖和设置静态资源过滤(确保所有配置文件能够成功导出)
<!--导入依赖-->
<dependencies>
<!--Junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<!--mysql数据库依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.29</version>
</dependency>
<!--c3p0连接池-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<!--servlet依赖-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<!--jsp依赖-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<!--mybatis框架依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.11</version>
</dependency>
<!--spring-mybatis整合框架-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
<!--JSTL-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--spring框架依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.23</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.23</version>
</dependency>
</dependencies>
注意:这里还有一个重要的操作,不然可能会出现404错误:
静态资源过滤:
<!--静态资源过滤-->
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
建立基本结构
Mybatis层编写
1.数据库配置文件databases.properties
jdbc.driver = com.mysql.cj.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=UTF-8
jdbc.username = root
jdbc.password = root
2.IDEA关联数据库
3.编写Mybatis核心配置文件(mybatis-config.xml)
<?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>
<!--配置别名-->
<typeAliases>
<package name="com.pojo"/>
</typeAliases>
<!--注册mapper:每一个Mapper.xml都需要在Mybatis核心配置文件中注册-->
<mappers>
<mapper resource="com/dao/BookMapper.xml"/>
</mappers>
</configuration>
4.编写数据库对应的实体类com.pojo.Books,可以使用lombok插件
package com.pojo;
public class Books {
public int bookID;
public String bookName;
public int bookCounts;
public String details;
public Books(int bookID, String bookName, int bookCounts, String details) {
this.bookID = bookID;
this.bookName = bookName;
this.bookCounts = bookCounts;
this.details = details;
}
public Books() {
}
public int getBookID() {
return bookID;
}
public void setBookID(int bookID) {
this.bookID = bookID;
}
public String getBookName() {
return bookName;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public int getBookCounts() {
return bookCounts;
}
public void setBookCounts(int bookCounts) {
this.bookCounts = bookCounts;
}
public String getDetails() {
return details;
}
public void setDetails(String details) {
this.details = details;
}
@Override
public String toString() {
return "Books{" +
"bookID=" + bookID +
", bookName='" + bookName + '\'' +
", bookCounts=" + bookCounts +
", details='" + details + '\'' +
'}';
}
}
5.编写Dao层的Mapper接口(BookMapper)
package com.dao;
import com.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
/**
* 增删改查
*/
public interface BookMapper {
//增加一本书
int addBook(Books book);
//删除一本书
int deleteBook(@Param("bookID") int ID);
//修改一本书
int updateBook(Books book);
//查询一本书
Books queryBookItem(@Param("bookID") int ID);
//查询全部书籍
List<Books> queryAllBooks();
}
6.编写接口对应的Mapper.xml文件(BookMapper.xml)
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dao.BookMapper">
<insert id="addBook" parameterType="Books">
insert into ssmbuild.books(bookID,bookName,bookCounts,details)
values(#{bookID},#{bookName},#{bookCounts},#{details})
</insert>
<delete id="deleteBook" parameterType="int">
delete from ssmbuild.books where bookID = #{bookID}
</delete>
<update id="updateBook" parameterType="Books">
update ssmbuild.books
set bookName = #{bookName},bookCounts = #{bookCounts},details = #{details}
where bookID = #{bookID}
</update>
<select id="queryBookItem" resultType="Books">
select * from ssmbuild.books where bookID = #{bookID}
</select>
<select id="queryAllBooks" resultType="Books">
select * from ssmbuild.books;
</select>
</mapper>
7.编写Service层的接口(BookService)和实现类(BookServiceImpl)
package com.service;
import com.pojo.Books;
import java.util.List;
public interface BookService {
//增加一本书
int addBook(Books book);
//删除一本书
int deleteBook(int ID);
//修改一本书
int updateBook(Books book);
//查询一本书
Books queryBookItem(int ID);
//查询全部书籍
List<Books> queryAllBooks();
}
package com.service;
import com.dao.BookMapper;
import com.pojo.Books;
import java.util.List;
public class BookServiceImpl implements BookService {
/*组合,service层调用dao层*/
public BookMapper bookMapper;
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
@Override
public int addBook(Books book) {
return bookMapper.addBook(book);
}
@Override
public int deleteBook(int ID) {
return bookMapper.deleteBook(ID);
}
@Override
public int updateBook(Books book) {
return bookMapper.updateBook(book);
}
@Override
public Books queryBookItem(int ID) {
return bookMapper.queryBookItem(ID);
}
@Override
public List<Books> queryAllBooks() {
return bookMapper.queryAllBooks();
}
}
编写Spring层
1.配置Spring整合Mybatis,这里的数据源使用c3p0连接池——编写相关配置文件:spring-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--关联数据库文件-->
<context:property-placeholder location="classpath:databases.properties"/>
<!--数据库连接池-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!--配置连接池属性-->
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!--c3p0连接池的私有属性-->
<property name="maxPoolSize" value="30"/>
<property name="minPoolSize" value="10"/>
<!--关闭连接后不自动commit-->
<property name="autoCommitOnClose" value="false"/>
<!--获取连接超时时间,单位是毫秒-->
<property name="checkoutTimeout" value="10000"/>
<!--当获取连接失败的重试次数-->
<property name="acquireRetryAttempts" value="2"/>
</bean>
<!--配置sqlSessionFactory对象-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入数据库连接池-->
<property name="dataSource" ref="dataSource"/>
<!--配置mybatis全局配置文件:mybatis-config.xml-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!--配置扫描Dao接口包,动态实现Dao接口注入到spring容器中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注入SQLSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!--给出需要扫描dao接口包-->
<property name="basePackage" value="com.dao"/>
</bean>
</beans>
2.Spring整合service层
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--扫描service相关的bean-->
<context:component-scan base-package="com.service"/>
<!--BookServiceImpl注入到IOC容器中-->
<bean id="BookServiceImpl" class="com.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper"/>
</bean>
<!--配置事务管理器-->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--注入数据库连接池-->
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
SpringMVC层
1.配置web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!--DispatcherServlet-->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--encodingFilter-->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--Session过期时间-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
2.配置spring-mvc.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 配置SpringMVC -->
<!-- 1.开启SpringMVC注解驱动 -->
<mvc:annotation-driven />
<!-- 2.静态资源默认servlet配置-->
<mvc:default-servlet-handler/>
<!-- 3.配置jsp 显示ViewResolver视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- 4.扫描web相关的bean -->
<context:component-scan base-package="com.controller" />
</beans>
3.Spring配置整合文件——applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="spring-dao.xml"/>
<import resource="spring-service.xml"/>
<import resource="spring-mvc.xml"/>
</beans>
Controller和视图层编写
1.Controller层编写(com.controller.BookController)
package com.controller;
import com.pojo.Books;
import com.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
@Controller
@RequestMapping("/book")
public class BookController {
@Autowired
@Qualifier("BookServiceImpl")
private BookService bookService;
//查询全部书籍
@RequestMapping("/allBook")
public String list(Model model)
{
List<Books> books = bookService.queryAllBooks();
model.addAttribute("list",books);
return "allBook";
}
//跳转到更新书籍页面
@RequestMapping("/toUpdateBook")
public String update(Model model,int id)
{
Books book = bookService.queryBookItem(id);
model.addAttribute("book",book);
return "toUpdateBook";
}
//保存更新书籍
@RequestMapping("/saveBook")
public String saveBook(Model model,Books book)
{
int code = bookService.updateBook(book);
List<Books> books = bookService.queryAllBooks();
model.addAttribute("list",books);
return "redirect:allBook";
}
//删除书籍
@RequestMapping("/del/{bookID}")
public String deleteBook(Model model,@PathVariable("bookID") int id)
{
int code = bookService.deleteBook(id);
return "redirect:/book/allBook";
}
//跳转到增加书籍页面
@RequestMapping("/toAddBook")
public String addBook()
{
return "addBook";
}
//保存新增书籍
@RequestMapping("/saveItem")
public String saveNewBook(Model model,Books book)
{
int code = bookService.addBook(book);
return "redirect:/book/allBook";
}
}
2.编写index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<html>
<head>
<title>首页</title>
<style type="text/css">
a {
text-decoration: none;
color: black;
font-size: 18px;
}
h3 {
width: 180px;
height: 38px;
margin: 100px auto;
text-align: center;
line-height: 38px;
background: deepskyblue;
border-radius: 4px;
}
</style>
</head>
<body>
<h3>
<a href="${pageContext.request.contextPath}/book/allBook">点击进入列表页</a>
</h3>
</body>
</html>
3.编写书籍列表页面allBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍列表</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 引入 Bootstrap -->
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>书籍列表 —— 显示所有书籍</small>
</h1>
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 column">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
</div>
</div>
<div class="row clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped">
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名字</th>
<th>书籍数量</th>
<th>书籍详情</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="book" items="${requestScope.get('list')}">
<tr>
<td>${book.getBookID()}</td>
<td>${book.getBookName()}</td>
<td>${book.getBookCounts()}</td>
<td>${book.getDetails()}</td>
<td>
<a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> |
<a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
4.新增书籍页面addBook.jsp
<%--
Created by IntelliJ IDEA.
User: leishen
Date: 2023/1/5
Time: 13:01
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>增加书籍</title>
</head>
<body>
<h1>新增书籍</h1>
<form action="${pageContext.request.contextPath}/book/saveItem" method="post">
书籍名称:<input type="text" name="bookName"><br>
书籍数量:<input type="text" name="bookCounts"><br>
书籍详情:<input type="text" name="details"><br>
<input type="submit" value="保存新增">
</form>
</body>
</html>
5.修改书籍页面toUpdateBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改页面</title>
</head>
<body>
<h1>修改书籍信息</h1>
<form action="${pageContext.request.contextPath}/book/saveBook" method="post">
书籍编号:<input type="text" value="${book.bookID}" readonly name="bookID"><br>
书籍名称:<input type="text" value="${book.bookName}" name="bookName"><br>
书籍数量:<input type="text" value="${book.bookCounts}" name="bookCounts"><br>
书籍详情:<input type="text" value="${book.details}" name="details"><br>
<input type="submit" value="保存修改">
</form>
</body>
</html>