SSM(Spring,SpringMVC,Mybatis)框架整合项目
快速上手SSM(Spring,SpringMVC,Mybatis)框架整合项目
环境要求:
- IDEA
- MySQL 8.0.25
- Tomcat 9
- Maven 3.6
数据库环境:
创建一个存放书籍数据的数据库表
CREATE DATABASE `ssmbooks`; USE `ssmbooks`; 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`) ); 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');
基本环境搭建:
1、新建一Maven项目!ssmbooks , 添加web的支持
2、导入相关的pom依赖!
<!--依赖:junit,数据库驱动,连接池,servlet,jsp,mybatis,mybatis-spring,spring,--> <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>8.0.25</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> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.2</version> <scope>compile</scope> </dependency> </dependencies>
3、Maven资源过滤设置
<!--静态资源导出问题--> <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、建立基本结构和配置框架!
- com.bai.pojo
- com.bai.dao
- com.bai.service
- com.bai.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>
Mybatis层编写
1、数据库配置文件 database.properties
jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbooks?useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=root
2、IDEA关联数据库
3、编写MyBatis的核心配置文件
<!-- 配置数据源 交给spring去做--> <!-- 别名--> <typeAliases> <package name="com.bai.pojo"/> </typeAliases> <!-- 注册BookMapper.xml--> <mappers> <mapper class="com.bai.dao.BookMapper"></mapper> </mappers>
4、编写数据库对应的实体类 com.bai.pojo.Books
使用lombok插件!
package com.bai.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class Books { private int bookID; private String bookName; private int bookCounts; private String detail; }
5、编写Dao层的 Mapper接口!
package com.bai.dao; import com.bai.pojo.Books; import org.apache.ibatis.annotations.Param; import java.util.List; public interface BookMapper { // 添加一本书 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(); // 通过名字查询书籍 List<Books> queryBookByName(@Param("BookName") String BookName); }
6、编写接口对应的 Mapper.xml 文件。需要导入MyBatis的包;
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.bai.dao.BookMapper"> <!-- 添加一本书--> <insert id="addBook" parameterType="com.bai.pojo.Books"> insert into ssmbooks.books ( bookName, bookCounts, detail) values (#{bookName},#{bookCounts},#{detail}) </insert> <!-- 删除一本书--> <delete id="deleteBookById" parameterType="int"> delete from ssmbooks.books where bookID = #{bookId} </delete> <!-- 更新一本书--> <update id="updateBook" parameterType="com.bai.pojo.Books"> update ssmbooks.books set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail} where bookID=#{bookID} </update> <!-- 通过id查询书籍--> <select id="queryBookById" resultType="com.bai.pojo.Books"> select * from ssmbooks.books where bookID=#{bookId} </select> <!-- 查询全部的书--> <select id="queryAllBook" resultType="com.bai.pojo.Books"> select * from ssmbooks.books </select> <!-- 通过名字查询书籍--> <select id="queryBookByName" resultType="com.bai.pojo.Books"> select * from ssmbooks.books where bookName like concat('%',#{BookName},'%') </select> </mapper>
7、编写Service层的接口和实现类
接口:
package com.bai.service; import com.bai.pojo.Books; import java.util.List; public interface BookService { // 添加一本书 int addBook(Books books); // 删除一本书 int deleteBookById(int id); // 更新一本书 int updateBook(Books books); // 查询一本书通过id Books queryBookById(int id); // 查询全部的书 List<Books> queryAllBook(); // 查询一本书通过名字 List<Books> queryBookByName(String BookName); }
实现类:
package com.bai.service; import com.bai.dao.BookMapper; import com.bai.pojo.Books; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Service; import java.util.List; @Service("BookServiceImpl") public class BookServiceImpl implements BookService{ //service层调dao层: 组合dao @Autowired private 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(); } public List<Books> queryBookByName(String BookName) { return bookMapper.queryBookByName(BookName); } }
OK,到此,底层需求操作编写完毕!
Spring层
1、配置Spring整合MyBatis,我们这里数据源使用c3p0连接池;
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/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.关联数据库配置文件--> <context:property-placeholder location="classpath:database.properties"/> <!-- 2.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(自动化的加载配置文件,并且可以自动设置到对象中!)--> <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.sqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- 绑定mybatis的配置文件--> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!-- 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"> <!-- 1.注入 sqlSessionFactory--> <!-- 继承就使用: sqlSessionFactoryBeanName 私有化就使用:sqlSessionTemplateBeanName--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 2.扫描dao包--> <property name="basePackage" value="com.bai.dao"/> </bean> </beans>
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" 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"> <!-- 1.扫描service下的包--> <context:component-scan base-package="com.bai.service"/> <!-- 2.将我们所有的业务类,注入到spring中,可以通过配置,或注解实现自动装配--> <!-- <bean id="BookServiceImpl" class="com.bai.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--> </beans>
Spring层搞定!再次理解一下,Spring就是一个大杂烩,一个容器!对吧!
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> <!--乱码配置: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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://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.扫描包:controller--> <context:component-scan base-package="com.bai.controller"/> <!-- 4.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> </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 http://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>
Controller 和 视图层编写
**1、BookController 类编写 **
package com.bai.controller; import com.bai.pojo.Books; import com.bai.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 { //controller层调service层 @Autowired @Qualifier("BookServiceImpl") private BookService bookService; //查询全部的书籍,并且返回到一个数据展示页面 @RequestMapping("/allbook") public String list(Model model) { List<Books> list = bookService.queryAllBook(); model.addAttribute("list", list); return "allbook"; } // 跳转到添加书籍页面 @RequestMapping("/toAddBook") public String toAddPaper() { return "addBook"; } //添加书籍的请求 @RequestMapping("/addBook") public String addBook(Books books){ System.out.println("Books=>:"+books); bookService.addBook(books); return "redirect:/book/allbook"; } //跳转到修改书籍页面 @RequestMapping("/toUpdate") public String toUpdatePaper(int id,Model model){ Books books = bookService.queryBookById(id); model.addAttribute("QBook", books); return "updateBook"; } //修改书籍请求 @RequestMapping("/updateBook") public String UpdateBook(Books books,Model model) { System.out.println("UpdateBook=>:"+books); bookService.updateBook(books); // 出现的问题:我们提交了修改的SQL请求,但是修改失败。 // 我们看一下sql语句,能否执行成功? 执行失败:发现sql语句需要传递一个id进行修改 // Books books1 = bookService.queryBookById(books.getBookID()); // model.addAttribute("books1", books1); return "redirect:/book/allbook"; } //删除书籍请求 @RequestMapping("/del/{bookid}") public String DeleteBook(@PathVariable("bookid") int id) { bookService.deleteBookById(id); return "redirect:/book/allbook"; } //通过名字查询书籍请求 @RequestMapping("/queryBook") public String queryBook(String queryBookName,Model model) { List<Books> list = bookService.queryBookByName(queryBookName); model.addAttribute("list", list); if (list.size()==0){ model.addAttribute("msg", "未查到数据"); } return "allbook"; } }
2、编写首页 index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>首页</title> </head> <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> <body> <h3> <a href="${pageContext.request.contextPath}/book/allbook">进入书籍页面</a> </h3> </body> </html>
3、书籍列表页面 allbook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>书籍列表</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- 引入 Bootstrap --> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>书籍列表 —— 显示所有书籍</small> </h1> </div> </div> </div> <div class="row"> <div class="col-md-4 column"> <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a> <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allbook">显示全部书籍</a> </div> <div class="col-md-4 column"> <form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right"> <span style="color: red;font-weight: bold">${msg}</span> <input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询的书籍"> <input type="submit" value="查询" class="btn btn-primary"> </form> </div> </div> <div class="row clearfix"> <div class="col-md-12 column"> <table class="table table-hover table-striped"> <thead> <tr> <th>书籍编号</th> <th>书籍名字</th> <th>书籍数量</th> <th>书籍详情</th> <th>操作</th> </tr> </thead> <tbody> <c:forEach var="book" items="${requestScope.get('list')}"> <tr> <td>${book.getBookID()}</td> <td>${book.getBookName()}</td> <td>${book.getBookCounts()}</td> <td>${book.getDetail()}</td> <td> <a href="${pageContext.request.contextPath}/book/toUpdate?id=${book.getBookID()}">更改</a> | <%-- //老式的传参--%> <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a> <%-- //Restful风格传参--%> </td> </tr> </c:forEach> </tbody> </table> </div> </div> </div> </body> </html>
5、添加书籍页面:addBook.jsp
<%@ 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="${pageContext.request.contextPath}/book/addBook" method="post"> 书籍名称:<input type="text" name="bookName"><br><br><br> 书籍数量:<input type="text" name="bookCounts"><br><br><br> 书籍详情:<input type="text" name="detail"><br><br><br> <input type="submit" value="添加"> </form> </div> </body> </html>
7、修改书籍页面 updateBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <<title>修改信息</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- 引入 Bootstrap --> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>修改信息</small> </h1> </div> </div> </div> <form action="${pageContext.request.contextPath}/book/updateBook" method="post"> <%--出现的问题:我们提交了修改的SQL请求,但是修改失败。 我们看一下sql语句,能否执行成功? 执行失败:发现sql语句需要传递一个id进行修改--%> <%-- 前端传参隐藏域--%> <input type="hidden" name="bookID" value="${QBook.getBookID()}"/> 书籍名称:<input type="text" name="bookName" value="${QBook.getBookName()}"/> 书籍数量:<input type="text" name="bookCounts" value="${QBook.getBookCounts()}"/> 书籍详情:<input type="text" name="detail" value="${QBook.getDetail() }"/> <input type="submit" value="提交"/> </form> </div> </body> </html>
配置Tomcat,进行运行!
项目结构
这里我们只是使用了SSM框架完成了基本的增删改查功能模块的网页
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