SpringMVC学习05（整合ssm）

5、整合SSM

环境要求

环境：

IDEA
MySQL 5.7.19
Tomcat 9
Maven 3.6

要求：

需要熟练掌握MySQL数据库，Spring，JavaWeb及MyBatis知识，简单的前端知识；

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=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');

基本环境搭建

1、新建一Maven项目！ssmbuild ，添加web的支持

2、导入相关的pom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、建立基本结构和配置框架！

com.chen.pojo
com.chen.dao
com.chen.service
com.chen.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.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8

jdbc.username=root

jdbc.password=123456

2、IDEA关联数据库

3、编写MyBatis的核心配置文件

<?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.chen.pojo"/>

   </typeAliases>

   <mappers>

       <mapper resource="com/chen/dao/BookMapper.xml"/>

   </mappers>

</configuration>

4、编写数据库对应的实体类 com.chen.pojo.Books

使用lombok插件！

package com.chen.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.chen.dao;

import com.chen.pojo.Books;

import java.util.List;

public interface BookMapper {

   //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();

}

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 Mapper 3.0//EN"

       "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.chen.dao.BookMapper">

   <!--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>

7、编写Service层的接口和实现类

接口：

package com.chen.service;

import com.chen.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.chen.service;

import com.chen.dao.BookMapper;

import com.chen.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 BookMapper bookMapper;

   public void setBookMapper(BookMapper bookMapper) {

       this.bookMapper = bookMapper;

  }

   public int addBook(Books book) {

       return bookMapper.addBook(book);

  }

   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();

  }

}

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.chen.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

   http://www.springframework.org/schema/context/spring-context.xsd">

   <!-- 扫描service相关的bean -->

   <context:component-scan base-package="com.chen.service" />

   <!--BookServiceImpl注入到IOC容器中-->

   <bean id="BookServiceImpl" class="com.chen.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、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 -->

   <beanclass="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.chen.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

       http://www.springframework.org/schema/beans/spring-beans.xsd">

   <import resource="spring-dao.xml"/>

   <import resource="spring-service.xml"/>

   <import resource="spring-mvc.xml"/>

</beans>

配置文件，暂时结束！Controller 和视图层编写

1、BookController 类编写，方法一：查询全部书籍

@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";

  }

}

2、编写首页 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、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.getDetail()}</td>

                       <td>

                           <ahref="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> |

                           <ahref="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>

                       </td>

                   </tr>

               </c:forEach>

               </tbody>

           </table>

       </div>

   </div>

</div>

4、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);

   bookService.addBook(books);

   return "redirect:/book/allBook";

}

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>

   <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>

6、BookController 类编写，方法三：修改书籍

@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("/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";

}

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>

8、BookController 类编写，方法四：删除书籍

@RequestMapping("/del/{bookId}")

public String deleteBook(@PathVariable("bookId") int id) {

   bookService.deleteBookById(id);

   return "redirect:/book/allBook";

}

配置Tomcat，进行运行！

到目前为止，这个SSM项目整合已经完全的OK了

巴特西

SpringMVC学习05（整合ssm）

5、整合SSM

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