SpringMVC:ssm整合练习一
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ssm整合练习一
环境及要求
环境:
- IDEA最新版
- MySQL 5.7.19
- Tomcat 9
- Maven 3.6
要求:
- 需要熟练掌握MySQL数据库,Spring,SpringMVC及MyBatis知识,简单的前端知识;
项目编写
数据库的搭建及准备工作
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` ) NOT NULL AUTO_INCREMENT COMMENT '书id', `bookName` ) NOT NULL COMMENT '书名', `bookCounts` ) NOT NULL COMMENT '数量', `detail` ) NOT NULL COMMENT '描述', KEY `bookID` (`bookID`) ) ENGINE=INNODB DEFAULT CHARSET=utf8 INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES (,,'从入门到放弃'), (,,'从删库到跑路'), (,,'从进门到进牢');
一般我们数据库还需要一个配置文件database.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=
数据库连接需要导入数据库的驱动包
<!-- 数据库驱动包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency>
IDEA关联数据库
编写数据库对应的实体类及Dao层
com.kuang.pojo.Books
package com.kuang.pojo; public class Books { private int bookID; private String bookName; private int bookCounts; private String detail; //有参,无参构造 //get、set方法 //toString() 方法 }
对应Dao层接口;com.kuang.dao.BookDao
package com.kuang.dao; import com.kuang.pojo.Books; import java.util.List; public interface BookDao { //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); //查询全部Book,返回list集合 List<Books> queryAllBook(); }
编写接口对应的Mapper文件。需要导入MyBatis的包;
<!-- MyBatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency>
编写BookMapper.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.kuang.dao.BookDao"> <!--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> <!--查询全部Book--> <select id="queryAllBook" resultType="Books"> SELECT * from ssmbuild.books </select> </mapper>
编写Mybatis配置文件,配置别名,注册映射文件
<?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.kuang.pojo"/> </typeAliases> <mappers> <mapper resource="com/kuang/dao/BookMapper.xml"/> </mappers> </configuration>
编写Service层的接口和实现类
接口
package com.kuang.service; import com.kuang.pojo.Books; import java.util.List; //BookService:底下需要去实现,调用dao层 public interface BookService { //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); //查询全部Book,返回list集合 List<Books> queryAllBook(); }
实现类
package com.kuang.service; import com.kuang.dao.BookDao; import com.kuang.pojo.Books; import java.util.List; public class BookServiceImpl implements BookService { //调用dao层的操作,设置一个set接口,方便Spring管理 private BookDao bookDao; public void setBookDao(BookDao bookDao) { this.bookDao = bookDao; } @Override public int addBook(Books book) { return bookDao.addBook(book); } @Override public int deleteBookById(int id) { return bookDao.deleteBookById(id); } @Override public int updateBook(Books books) { return bookDao.updateBook(books); } @Override public Books queryBookById(int id) { return bookDao.queryBookById(id); } @Override public List<Books> queryAllBook() { return bookDao.queryAllBook(); } }
OK,底层需求操作编写完毕!
配置Spring整合MyBatis
我们这里数据源使用c3p0连接池;我们来导入相关jar包
<!-- 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!-- mybatis-spring整合包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!--Spring相关包--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.24.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.24.RELEASE</version> </dependency>
到现在,应该有这么多jar包了
我们去编写Spring相关的配置文件;
Spring整合mybatis
<?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"> <!-- 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 --> <!--解释 : https://www.cnblogs.com/jpfss/p/7799806.html--> <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.kuang.dao"/> </bean> </beans>
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相关的bean --> <context:component-scan base-package="com.kuang.service" /> <!--BookServiceImpl注入到IOC容器中--> <bean id="BookServiceImpl" class="com.kuang.service.BookServiceImpl"> <property name="bookDao" ref="bookDao"/> </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相关配置
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <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> <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> </web-app>
配置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 http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!-- 配置SpringMVC --> <!-- 1.开启SpringMVC注解模式 --> <!-- 简化配置: (1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter (2)提供一些列:数据绑定,数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持 --> <mvc:annotation-driven /> <!-- 2.静态资源默认servlet配置 (1)加入对静态资源的处理:js,gif,png (2)允许使用"/"做整体映射 --> <mvc:default-servlet-handler/> <!-- 3.配置jsp 显示ViewResolver --> <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.kuang.controller" /> </beans>
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="spring/spring-dao.xml"/> <import resource="spring/spring-service.xml"/> <import resource="spring/spring-mvc.xml"/> </beans>
导入jsp和servlet的包
<!--jsp,servlet--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency>
BookController类
package com.kuang.controller; import com.kuang.pojo.Books; import com.kuang.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; @RequestMapping("/allBook") public String list(Model model) { List<Books> list = bookService.queryAllBook(); model.addAttribute("list", list); return "allBook"; } @RequestMapping("/toAddBook") public String toAddPaper() { return "addBook"; } @RequestMapping("/addBook") public String addPaper(Books books) { System.out.println(books); bookService.addBook(books); return "redirect:/book/allBook"; } @RequestMapping("/toUpdateBook") public String toUpdateBook(Model model, int id) { Books books = bookService.queryBookById(id); System.out.println(books); model.addAttribute("book",books ); return "updateBook"; } @RequestMapping("/del/{bookId}") public String deleteBook(@PathVariable("bookId") int id) { bookService.deleteBookById(id); return "redirect:/book/allBook"; } @RequestMapping("/updateBook") public String updateBook(Model model, Books book) { System.out.println(book); bookService.updateBook(book); Books books = bookService.queryBookById(book.getBookID()); model.addAttribute("books", books); return "redirect:/book/allBook"; } }
前端视图层
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="${pageContext.request.contextPath}/book/allBook">点击进入列表页</a> </h3> </body> </html>
allbook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>书籍列表</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- 引入 Bootstrap --> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>书籍列表 —— 显示所有书籍</small> </h1> </div> </div> </div> <div class="row"> <div class="col-md-4 column"> <a class="btn btn-primary" href="${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>${book.getDetail()}</td> <td> <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> | <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a> </td> </tr> </c:forEach> </tbody> </table> </div> </div> </div>
addBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>新增书籍</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- 引入 Bootstrap --> <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>新增书籍</small> </h1> </div> </div> </div> <form action="${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>
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>
Maven文件汇总
记得Maven资源导入问题;
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.kuang</groupId> <artifactId>ssm-demo01</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>ssm-demo01 Maven Webapp</name> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!-- 数据库驱动包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <!-- MyBatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <!-- 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!-- mybatis-spring整合包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!--Spring相关包--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.24.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.24.RELEASE</version> </dependency> <!--jsp,servlet--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> </dependencies> <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> <finalName>ssm-demo01</finalName> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build> </project>
项目结构图
我们配置Tomcat运行环境,测试
首页图
全部列表页
增加页面
修改页面
功能测试OK,完毕!这个是同学们的第一个SSM整合案例,一定要烂熟于心!
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