SSM框架整合基础案例详解
1.数据库环境
创建一个存放书籍数据的数据库表
CREATE DATABASE `ssmbuild`;USE `ssmbuild`;DROP TABLE IF EXISTS `books`;CREATE TABLE `books` (`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',`bookName` VARCHAR(100) NOT NULL COMMENT '书名',`bookCounts` INT(11) NOT NULL COMMENT '数量',`detail` VARCHAR(200) NOT NULL COMMENT '描述',KEY `bookID`(`bookID`)
)ENGINE=INNODB DEFAULT CHARSET=utf8INSERT 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');2.基本环境搭建
2.1 新建一Maven项目，ssmbuild，添加web的支持
2.2 导入相关的pom依赖
<!--依赖问题-->
<dependencies><!-- junit驱动 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><!-- mysql驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.21</version></dependency><!--数据库连接池：c3p0--><dependency><groupId>com.mchange</groupId><artifactId>c3p0</artifactId><version>0.9.5.5</version></dependency><!--Servlet-JSP--><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- Mybatis驱动 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.7</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.6</version></dependency><!--Spring--><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.3.9</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.3.9</version></dependency></dependencies>2.3 Maven资源过滤设置
<!--静态资源导出问题-->
<build><resources><resource><directory>src/main/resources</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource><resource><directory>src/main/java</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource></resources>
</build>2.4 建立基本结构和配置框架
- com.mc.pojo
- com.mc.dao
- com.mc.service
- com.mc.controller
- mybatis-config.xml
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration></configuration>- 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/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd"></beans>3.Mybatis层编写
3.1 数据库配置文件database.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
# 如果使用的是MySQL8.0+，增加一个时区的配置 &serverTimezone=Asia/Shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8&allowPublicKeyRetrieval=true
jdbc.username=root
jdbc.password=mc1234563.2 IDEA关联数据库
3.3 编写MyBatis的核心配置文件
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd"><!-- configuration核心配置文件 -->
<configuration><!-- 可以给实体类起别名 --><typeAliases><package name="com.mc.pojo"/></typeAliases><mappers><mapper class="com.mc.dao.BookMapper"/></mappers></configuration>3.4 编写数据库对应的实体类com.mc.pojo.Books
使用lombok插件！
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {private int bookID;private String bookName;private int bookCounts;private String detail;
}3.5 编写Dao层的Mapper接口
public interface BookMapper {// 增加一本书int addBook(Books books);// 删除一本书int deleteBookById(@Param("bookId") int id);// 更新一本书int updateBook(Books books);// 查询一本书Books queryBookById(@Param("bookId") int id);// 查询全部的书List<Books> queryAllBook();
}3.6 编写接口对应的Mapper.xml文件，需要导入MyBatis的包
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.mc.dao.BookMapper"><insert id="addBook" parameterType="Books">insert into ssmbuild.books (bookName, bookCounts, detail)values (#{bookName},#{bookCounts},#{detail})</insert><delete id="deleteBookById" parameterType="int">delete from ssmbuild.bookswhere bookID = #{bookId}</delete><update id="updateBook" parameterType="Books">update ssmbuild.booksset bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}where bookID=#{bookID};</update><select id="queryBookById" resultType="Books">select * from ssmbuild.bookswhere bookID=#{bookID}</select><select id="queryAllBook" resultType="Books">select * from ssmbuild.books</select></mapper>3.7 编写Service层的接口和实现类
接口：
public interface BookService {// 增加一本书int addBook(Books books);// 删除一本书int deleteBookById(int id);// 更新一本书int updateBook(Books books);// 查询一本书Books queryBookById(int id);// 查询全部的书List<Books> queryAllBook();
}实现类：
public class BookServiceImpl implements BookService {// service调dao层：组合Daoprivate BookMapper bookMapper;public void setBookMapper(BookMapper bookMapper) {this.bookMapper = bookMapper;}public int addBook(Books books) {return bookMapper.addBook(books);}public int deleteBookById(int id) {return bookMapper.deleteBookById(id);}public int updateBook(Books books) {return bookMapper.updateBook(books);}public Books queryBookById(int id) {return bookMapper.queryBookById(id);}public List<Books> queryAllBook() {return bookMapper.queryAllBook();}
}4.Spring层编写
4.1 配置Spring整合MyBatis，我们这里数据源使用c3p0连接池
4.2 我们去编写Spring整合Mybatis的相关的配置文件：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/beanshttps://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsd"><!--1.关联数据库配置文件--><context:property-placeholder location="classpath:database.properties"/><!--2.连接池dbcp:半自动化操作，不能自动连接c3p0:自动化操作(自动化的加载配置文件，并且可以自动设置到对象中! )druid : hikari--><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><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--><property name="checkoutTimeout" value="10000"/><!--当获取连按失败重试次数--><property name="acquireRetryAttempts" value="2"/></bean><!--3.sqlSessionFactory--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"/><!--绑定Mybatis配置文件--><property name="configLocation" value="classpath:mybatis-config.xml"/></bean><!--4.配置dao接口扫描包,动态的实现了Dao接口可以注入到Spring容器中!--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!--注入sqlSessionFactory --><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/><!--要扫描的dao包--><property name="basePackage" value="com.mc.dao" /></bean></beans>4.3 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"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/aophttps://www.springframework.org/schema/aop/spring-aop.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsd"><!--1.扫描service下的包--><context:component-scan base-package="com.mc.service"/><!--2.将我们的所有业务类，注入到Spring，可以通过配置，或者注解实现--><bean id="BookServiceImpl" class="com.mc.service.BookServiceImpl"><property name="bookMapper" ref="bookMapper"/></bean><!--3.声明式事务配置--><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><!--注入数据源--><property name="dataSource" ref="dataSource"/></bean><!--4.aop事务支持!--><!--配置声明式事务--><bean id="transactionManage" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"/></bean><!--结合AOP实现事务的织入--><!--配置事务通知--><tx:advice id="txAdvice" transaction-manager="transactionManage"><!--给哪些方法配置事务--><!--配置事务的传播特性： propagation--><tx:attributes><tx:method name="*" propagation="REQUIRED"/></tx:attributes></tx:advice><!--配置事务切入--><aop:config><aop:pointcut id="txPointCut" expression="execution(* com.mc.dao.*.*(..))"/><aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/></aop:config></beans>Spring层搞定！再次理解一下，Spring就是一个大杂烩，一个容器！
5.SpringMVC层编写
5.1 web.xml
<?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"><!--配置DispatchServlet：这个是SpringMVC的核心，请求分发器，前端控制器--><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--DispatchServlet要绑定(关联)一个springmvc的配置文件：【servlet-name】-servlet.xml--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></init-param><!--启动级别-1--><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping><!--配置SpringMVC的乱码过滤器--><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--><session-config><session-timeout>15</session-timeout></session-config>
</web-app>5.1 spring-mvc.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"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd"><!--1.注解驱动--><mvc:annotation-driven/><!--2.静态资源过滤--><mvc:default-servlet-handler/><!--3.自动扫描包：controller--><context:component-scan base-package="com.mc.controller"/><!--4.视图解析器--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"><!--前缀--><property name="prefix" value="/WEB-INF/jsp/"/><!--后缀--><property name="suffix" value=".jsp"/></bean></beans>5.3 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/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd"><import resource="classpath:spring-dao.xml"/><import resource="classpath:spring-service.xml"/><import resource="classpath:spring-mvc.xml"/></beans>配置文件，暂时结束！
6.Controller和视图层编写
6.1 BookController 类编写，方法一：查询全部书籍
@Controller
@RequestMapping("/book")
public class BookController {// controller 调 service层@Autowired@Qualifier("BookServiceImpl")public BookService bookService;// 查询全部的书籍,并返回到一个书籍展示页而@RequestMapping("/allBook")public String list(Model model) {List<Books> list = bookService.queryAllBook();model.addAttribute("list", list);return "allBook";}
}6.2 编写首页index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>首页</title><style>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: 5px;}</style></head>
<body><h3><a href="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a></h3>
</body>
</html>6.3 书籍列表页面allbook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>书籍展示</title><%--BootStrap美化界面--%><link href= "https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/></head>
<body>
<div class="container"><div class="row clearfix"><div class="col-md-12 column"><div class="page-header"><h1><smal1>书籍列表 ———— 显示所有书籍</smal1></h1></div></div><div class="row" ><div class="col-md-4 column"><%--toAddBook--%><a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a><a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a></div><div class="col-md-4 column"></div><div class="col-md-4 column"><%--搜索查询书籍--%><form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right"><span style="color:red;font-weight: bold">${error}</span><input type="text" name= "queryBookName" class="form-control" placeholder="请输入要查询的书籍名称"><input type="submit" value="查询" class="btn btn-primary"></form></div></div></div><div class="row clearfix"><div class="col-md-12 column"><table class="table table-hover table-striped"><thead><tr><th>书籍编号</th><th>书籍名称</th><th>书籍数量</th><th>书籍详情</th><th>操作</th></tr></thead><%--书籍从数据库中查询出来,从这个list中遍历出来:foreach--%><tbody><c:forEach var="book" items="${list}"><tr><td>${book.bookID}</td><td>${book.bookName}</td><td>${book.bookCounts}</td><td>${book.detail}</td><td><a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.bookID}">修改</a> | <a href="${pageContext.request.contextPath}/book/toDeleteBook/${book.bookID}">删除</a></td></tr></c:forEach></tbody></table></div></div>
</div>
</body>
</html>6.4 BookController类编写，方法二：添加书籍
// 跳转到增加书籍页面
@RequestMapping("/toAddBook")
public String toAddPaper(){return "addBook";
}//添加书籍的请求
@RequestMapping("/addBook")
public String addBook(Books books){System.out.println("addBook=>"+books);bookService.addBook(books);return "redirect:/book/allBook";
}6.5 添加书籍页面：addBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>新增书籍</title><%--BootStrap美化界面--%><link href= "https://cdn.staticfile.org/twitter-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><smal1>新增书籍</smal1></h1></div></div></div><form action="${pageContext.request.contextPath}/book/addBook" method="post"><div class="form-group"><label>书籍名称</label><input type="text" name="bookName" class="form-control" required></div><div class="form-group"><label>书籍数量</label><input type="text" name="bookCounts" class="form-control" required></div><div class="form-group"><label>书籍描述</label><input type="text" name="detail" class="form-control" required></div><div class="form-group"><input type="submit" class="form-control" value="添加"></div></form>
</div>
</body>
</html>6.6 BookController类编写，方法三：修改书籍
// 跳转到修改书籍页面
@RequestMapping("/toUpdateBook")
public String toUpdatePaper(int id,Model model){Books book = bookService.queryBookById(id);model.addAttribute("Qbook",book);return "updateBook";
}//修改书籍的请求
@RequestMapping("/updateBook")
public String updateBook(Books books){System.out.println("updateBook=>"+books);bookService.updateBook(books);return "redirect:/book/allBook";
}6.7 修改书籍页面：updateBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>修改书籍</title><%--BootStrap美化界面--%><link href= "https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/></head>
<body><div class="container"><div class="row clearfix"><div class="col-md-12 column"><div class="page-header"><h1><smal1>修改书籍</smal1></h1></div></div></div><form action="${pageContext.request.contextPath}/book/updateBook" method="post"><%--出现的问题:我们提交了修改的SQL请求，但是修改失败，初次考虑，是事务问题，配置完毕事务，依旧失败!--%><%--看一下SQL语句，能否执行成功，SQL执行失败，修改未完成--%><%--前端传递隐藏域--%><input type="hidden" name="bookID" value="${Qbook.bookID}"><div class="form-group"><label>书籍名称</label><input type="text" name="bookName" class="form-control" required value="${Qbook.bookName}"></div><div class="form-group"><label>书籍数量</label><input type="text" name="bookCounts" class="form-control" required value="${Qbook.bookCounts}"></div><div class="form-group"><label>书籍描述</label><input type="text" name="detail" class="form-control" required value="${Qbook.detail}"></div><div class="form-group"><input type="submit" class="form-control" value="修改"></div></form>
</div>
</body>
</html>6.8 BookController类编写，方法四：删除书籍
// 删除书籍请求
@RequestMapping("/toDeleteBook/{bookId}")
public String toDeletePaper(@PathVariable("bookId") int id){bookService.deleteBookById(id);return "redirect:/book/allBook";
}6.9 BookController类编写，方法五：搜索查询书籍
// 搜索查询书籍
@RequestMapping("/queryBook")
public String queryBook(String queryBookName, Model model) {Books books = bookService.queryBookByName(queryBookName);List<Books> list = new ArrayList<Books>();list.add(books);if (books == null){list = bookService.queryAllBook();model.addAttribute("error","未查到");}model.addAttribute("list",list);return "allBook";
}配置Tomcat，进行运行！
7.小结及展望
- 这是一个基础的SSM整合案例
- 掌握这个就已经可以进行基本网站的单独开发
- 功能只有增删改查等基本操作
8.项目运行结果演示
8.1 首页
8.2 书籍页面
8.3 新增书籍
8.4 修改书籍
8.5 删除书籍
8.6 查询书籍
8.7 显示全部书籍
