Loading... # **SSM整合** ## **目标** 1. **熟练整合SSM** 2. **使用SSM环境进行增删改查** **项目结构**  ## **一、创建数据库** ``` 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=utf8; 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'); ``` ## **二、基本环境搭建** ### **1. 创建一个模块，添加web支持** ### **2. 导入相关依赖** ``` <dependencies> <!--Junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--数据库驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <!-- 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</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--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <!--Spring--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.9.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.9.RELEASE</version> </dependency> </dependencies> ``` ### **3. Maven资源过滤设置** ``` <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> ``` ### **4. 搭建项目基本结构** * **com.shida.entity** * **com.shida.dao** * **com.shida.service** * **com.shida.controller** * **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> </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/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> </beans> ``` ## **三、mybatis层** ### **1、数据库配置文件 ******database.properties**** ``` jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=123456 ``` ### **2. 编写MyBatis的核心配置文件 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> <typeAliases> <package name="com.shida.entity"/> </typeAliases> <mappers> <package name="com.shida.dao"/> </mappers> </configuration> ``` ### **3. 数据库映射实体类Books** **导入lombok依赖** ``` <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.10</version> </dependency> ``` ``` @Data @AllArgsConstructor @NoArgsConstructor public class Books { private int bookID; private String bookName; private int bookCounts; private String detail; } ``` ### **4. 编写Dao层的 Mapper接口！** ``` public interface BooksMapper { /** *功能描述: 查询所有书籍 * @return java.util.List<com.shida.entity.Books> * @author jiaoqianjin * @date 2021/3/19 */ List<Books> queryAllBooks(); } ``` ### **5. 编写接口对应的 Mapper.xml 文件。** ``` <?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.shida.dao.BooksMapper"> <!--查询全部Book--> <select id="queryAllBooks" resultType="books"> SELECT * from books </select> </mapper> ``` ### **6. 编写Service层的接口** ``` public interface BooksService { /** *功能描述: 查询所有书籍 * @return java.util.List<com.shida.entity.Books> * @author jiaoqianjin * @date 2021/3/19 */ List<Books> queryAllBooks(); } ``` ### **7. 编写Service层实现类** ``` public class BooksServiceImpl implements BooksService { //调用dao层的操作，设置一个set接口，方便Spring管理 private BooksMapper booksMapper; public void setBooksMapper(BooksMapper booksMapper) { this.booksMapper = booksMapper; } /** * 功能描述: 查询所有书籍 * * @return java.util.List<com.shida.entity.Books> * @author jiaoqianjin * @date 2021/3/19 */ public List<Books> queryAllBooks() { return booksMapper.queryAllBooks(); } } ``` ## **四、Spring层** ### **1. spring-dao.xml** **编写Spring整合Mybatis的相关的配置文件** ``` <?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" 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"> <!-- 配置整合mybatis --> <!-- 1.关联数据库文件 --> <context:property-placeholder location="classpath:database.properties"/> <!-- 2.数据库连接池 --> <!--数据库连接池 dbcp 半自动化操作 不能自动连接 c3p0 自动化操作（自动的加载配置文件 并且设置到对象里面） --> <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 --> <property name="checkoutTimeout" value="10000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!-- 3.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MyBaties全局配置文件:mybatis-config.xml --> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!-- 4.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.shida.dao"/> </bean> </beans> ``` ### **2. spring-service.xml** ****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 http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 扫描service层下的包--> <context:component-scan base-package="com.shida.service"/> <!-- serviceImpl注入到IOC--> <bean id="BooksServiceImpl" class="com.shida.service.BooksServiceImpl"> <property name="booksMapper" ref="booksMapper"/> </bean> <!-- 配置事务管理--> <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="manager"> <property name="dataSource" ref="dataSource"/> </bean> </beans> ``` ## **五、SpringMVC层** ### **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"> <!--DispatcherServlet--> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！--> <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. 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/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.shida.controller" /> </beans> ``` ### **3. applicationContext.xml** **Spring配置整合文件** ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="spring/spring-dao.xml"/> <import resource="spring/spring-service.xml"/> <import resource="spring/spring-mvc.xml"/> </beans> ``` ## **六、控制层Controller&视图层jsp** ### **1. 首页index.jsp** ``` <%-- Created by IntelliJ IDEA. User: dell Date: 2021/3/19 Time: 9:09 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <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="${pageContext.request.contextPath}/book/allBook">点击进入列表页</a> </h3> </body> </html> ``` ### **2. BooksController 类编写 ， 方法一：查询全部书籍** ``` @Controller @RequestMapping("/book") public class BooksController { @Autowired private BooksService booksService; @RequestMapping("/allBook") private String getBooksList(Model model) { List<Books> booksList = booksService.queryAllBooks(); System.out.println(booksList); model.addAttribute("books",booksList); return "allBook"; } } ``` ### **3. 书籍列表页 allBook.jsp** ``` <%-- Created by IntelliJ IDEA. User: dell Date: 2021/3/19 Time: 9:16 To change this template use File | Settings | File Templates. --%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>书籍列表</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- 引入 Bootstrap --> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>书籍列表 —— 显示所有书籍</small> </h1> </div> </div> </div> <div class="row"> <div class="col-md-4 column"> <a class="btn btn-primary" href="${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="${requestScope.get('books')}"> <tr> <td>${book.getBookID()}</td> <td>${book.getBookName()}</td> <td>${book.getBookCounts()}</td> <td>${book.getDetail()}</td> <td> <a href="${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> </body> </html> ``` ## **七、配置Tomcat，运行**  ## **其他案例** ### **1. 添加对应接口** **BooksMapper** **添加 添加数据，删除数据，更新数据，根据id查询数据接口** ``` public interface BooksMapper { /** *功能描述: 查询所有书籍 * @return java.util.List<com.shida.entity.Books> * @author jiaoqianjin * @date 2021/3/19 */ List<Books> queryAllBooks(); //增加一个Book int addBook(Books book); //根据id删除一个Book int deleteBookById(int id); //更新Book int updateBook(Books books); //根据id查询,返回一个Book Books queryBookById(int id); } ``` **BooksMapper.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.shida.dao.BooksMapper"> <!--查询全部Book--> <select id="queryAllBooks" resultType="books"> SELECT * from books </select> <!--增加一个Book--> <insert id="addBook" parameterType="Books"> insert into ssmbuild.books(bookName,bookCounts,detail) values (#{bookName}, #{bookCounts}, #{detail}) </insert> <!--根据id删除一个Book--> <delete id="deleteBookById" parameterType="int"> delete from ssmbuild.books where bookID=#{bookID} </delete> <!--更新Book--> <update id="updateBook" parameterType="Books"> update ssmbuild.books set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail} where bookID = #{bookID} </update> <!--根据id查询,返回一个Book--> <select id="queryBookById" resultType="Books"> select * from ssmbuild.books where bookID = #{bookID} </select> </mapper> ``` **BooksService接口** ``` public interface BooksService { /** * 功能描述: 查询所有书籍 * * @return java.util.List<com.shida.entity.Books> * @author jiaoqianjin * @date 2021/3/19 */ List<Books> queryAllBooks(); //增加一个Book int addBook(Books book); //根据id删除一个Book int deleteBookById(int id); //更新Book int updateBook(Books books); //根据id查询,返回一个Book Books queryBookById(int id); } ``` **BooksServiceImpl** ``` public class BooksServiceImpl implements BooksService { //调用dao层的操作，设置一个set接口，方便Spring管理 private BooksMapper booksMapper; public void setBooksMapper(BooksMapper booksMapper) { this.booksMapper = booksMapper; } /** * 功能描述: 查询所有书籍 * * @return java.util.List<com.shida.entity.Books> * @author jiaoqianjin * @date 2021/3/19 */ public List<Books> queryAllBooks() { return booksMapper.queryAllBooks(); } public int addBook(Books book) { return booksMapper.addBook(book); } public int deleteBookById(int id) { return booksMapper.deleteBookById(id); } public int updateBook(Books books) { return booksMapper.updateBook(books); } public Books queryBookById(int id) { return booksMapper.queryBookById(id); } } ``` ### **2. BookController 类编写 ， 方法二：添加书籍** ``` @RequestMapping("/toAddBook") public String toAddPaper() { return "addBook"; } @RequestMapping("/addBook") public String addPaper(Books books) { System.out.println(books); booksService.addBook(books); return "redirect:/book/allBook"; } ``` **添加书籍页面：addBook.jsp** ``` <%-- Created by IntelliJ IDEA. User: dell Date: 2021/3/19 Time: 10:23 To change this template use File | Settings | File Templates. --%> <%@ 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> <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>新增书籍</small> </h1> </div> </div> </div> <form action="${pageContext.request.contextPath}/book/addBook" method="post"> 书籍名称：<input type="text" name="bookName"><br><br><br> 书籍数量：<input type="text" name="bookCounts"><br><br><br> 书籍详情：<input type="text" name="detail"><br><br><br> <input type="submit" value="添加"> </form> </div> ``` ### **3. BookController 类编写 ， 方法三：修改书籍** ``` @RequestMapping("/toUpdateBook") public String toUpdateBook(Model model, int id) { Books books = booksService.queryBookById(id); System.out.println(books); model.addAttribute("book", books); return "updateBook"; } @RequestMapping("/updateBook") public String updateBook(Model model, Books book) { System.out.println(book); booksService.updateBook(book); Books books = booksService.queryBookById(book.getBookID()); model.addAttribute("books", books); return "redirect:/book/allBook"; } ``` **修改书籍页面 ******updateBook.jsp**** ``` <%-- Created by IntelliJ IDEA. User: dell Date: 2021/3/19 Time: 10:26 To change this template use File | Settings | File Templates. --%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>修改信息</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>修改信息</small> </h1> </div> </div> </div> <form action="${pageContext.request.contextPath}/book/updateBook" method="post"> <input type="hidden" name="bookID" value="${book.getBookID()}"/> 书籍名称：<input type="text" name="bookName" value="${book.getBookName()}"/> 书籍数量：<input type="text" name="bookCounts" value="${book.getBookCounts()}"/> 书籍详情：<input type="text" name="detail" value="${book.getDetail() }"/> <input type="submit" value="提交"/> </form> </div> ``` ### **4. BookController 类编写 ， 方法四：删除书籍** ``` @RequestMapping("/del/{bookId}") public String deleteBook(@PathVariable("bookId") int id) { booksService.deleteBookById(id); return "redirect:/book/allBook"; } ``` Last modification：June 4th, 2021 at 10:34 am © 允许规范转载