【Spring】SSM整合

其他 2021-02-14 14:29:14 阅读次数: 0

环境要求：

  • IDEA
  • MySQL 8.0 CE
  • Tomcat 9.0.41
  • Maven 3.6.3

完整的项目地址为：https://codechina.csdn.net/dreaming_coder/ssm

1. 创建数据库

/*
Navicat MySQL Data Transfer

Source Server         : ice
Source Server Version : 80021
Source Host           : localhost:3306
Source Database       : ssm

Target Server Type    : MYSQL
Target Server Version : 80021
File Encoding         : 65001

Date: 2021-01-14 21:34:07
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for books
-- ----------------------------
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books` (
  `book_id` int NOT NULL AUTO_INCREMENT COMMENT '书本编号',
  `book_name` varchar(100) NOT NULL COMMENT '书名',
  `book_counts` int NOT NULL COMMENT '数量',
  `detail` varchar(200) DEFAULT NULL COMMENT '描述',
  PRIMARY KEY (`book_id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of books
-- ----------------------------
INSERT INTO `books` VALUES ('1', 'Java', '1', '从入门到放弃');
INSERT INTO `books` VALUES ('2', 'MySQL', '10', '从删库到跑路');
INSERT INTO `books` VALUES ('3', 'Linux', '5', '从进门到进牢');

2. 新建 Maven 项目

  1. 添加 web 支持

  2. 导入相关依赖

    <dependencies>
    <!-- 单元测试 -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13</version>
    </dependency>
    <!-- 数据库驱动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.22</version>
    </dependency>
    <!-- 数据库连接池 -->
    <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 -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.6</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>5.3.2</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.3.2</version>
    </dependency>
    <!-- 偷懒依赖 -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>RELEASE</version>
        <scope>compile</scope>
    </dependency>
</dependencies>

  3. Maven 设置静态资源过滤

    <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.ice.pojo

    • com.ice.mapper

    • com.ice.service

    • com.ice.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"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/aop http://www.springframework.org/schema/aop/spring-aop.xsd
                            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
                            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

</beans>

3. 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/mybatis?serverTimezone=Asia/Shanghai&useSSL=true&useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=root

  2. IDEA 关联数据库

    在这里插入图片描述

  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>
    <!-- 设置别名 -->
    <typeAliases>
        <package name="com.ice.pojo"/>
    </typeAliases>

</configuration>

  4. 编写实体类

    package com.ice.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
      
      
    private int id;
    private String name;
    private int counts;
    private String detail;
}

  5. 编写 Dao 层的 Mapper 接口

    package com.ice.mapper;

import com.ice.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BookMapper {
      
      

    // 增加一本书
    int addBook(@Param("book") Books book);

    // 删除一本书
    int deleteBookById(@Param("id") int id);

    // 更新一本书
    int updateBook(@Param("book") Books book);

    // 根据 id 查询一本书
    Books queryBookById(@Param("id") int id);

    // 查询全部的书
    List<Books> queryAllBooks();

}

  6. 编写接口对应的 Mapper.xml 文件

    <?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.ice.mapper.BookMapper">

    <insert id="addBook" parameterType="Books">
        insert into ssm.books (book_name, book_counts, detail)
        values (#{name}, #{counts}, #{detail});
    </insert>

    <delete id="deleteBookById" parameterType="int">
        delete
        from ssm.books
        where book_id = #{id};
    </delete>

    <update id="updateBook" parameterType="Books">
        update ssm.books
        set book_name   = #{name},
            book_counts = #{counts},
            detail      = #{detail}
        where book_id = #{id};
    </update>

    <select id="queryBookById" parameterType="int" resultMap="bookMap">
        select *
        from ssm.books
        where book_id = #{id};
    </select>

    <select id="queryAllBooks" resultMap="bookMap">
        select *
        from ssm.books;
    </select>

    <resultMap id="bookMap" type="Books">
        <id property="id" column="book_id"/>
        <result property="name" column="book_name"/>
        <result property="counts" column="book_counts"/>
        <result property="details" column="details"/>
    </resultMap>

</mapper>

  7. 编写Service层的接口和实现类

    【接口】

    package com.ice.service;

import com.ice.pojo.Books;

import java.util.List;

public interface BookService {
      
      

    // 增加一本书
    int addBook(Books book);

    // 删除一本书
    int deleteBookById(int id);

    // 更新一本书
    int updateBook(Books book);

    // 根据 id 查询一本书
    Books queryBookById(int id);

    // 查询全部的书
    List<Books> queryAllBooks();

}

    【实现类】

    package com.ice.service;

import com.ice.mapper.BookMapper;
import com.ice.pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService {
      
      

    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
      
      
        this.bookMapper = bookMapper;
    }

    @Override
    public int addBook(Books book) {
      
      
        return bookMapper.addBook(book);
    }

    @Override
    public int deleteBookById(int id) {
      
      
        return bookMapper.deleteBookById(id);
    }

    @Override
    public int updateBook(Books book) {
      
      
        return bookMapper.updateBook(book);
    }

    @Override
    public Books queryBookById(int id) {
      
      
        return bookMapper.queryBookById(id);
    }

    @Override
    public List<Books> queryAllBooks() {
      
      
        return bookMapper.queryAllBooks();
    }
}

4. Spring 层

  1. 配置Spring整合MyBatis，我们这里数据源使用 c3p0 连接池，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 http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 关联数据库配置文件 -->
    <context:property-placeholder location="classpath:database.properties"/>

    <!-- 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（自动化加载配置文件，并且可以自动设置到对象）
        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"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!-- 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>

    <!-- 配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
    <!-- 新的方式，不需要实现类 -->
    <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.ice.mapper"/>
    </bean>

</beans>

  2. 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下的包 -->
    <context:component-scan base-package="com.ice.service"/>

    <!-- 将所有业务类注入到spring，可以配置，可以注解 -->
    <bean id="bookServiceImpl" class="com.ice.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!-- 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据源 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>

</beans>

5. Spring MVC 层

  1. 配置 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">

    <!--1.注册servlet-->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--通过初始化参数指定配置文件的位置，进行关联-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <!-- 启动顺序，数字越小，启动越早 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!--所有请求都会被springmvc拦截 -->
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 2.编码过滤器 -->
    <filter>
        <filter-name>encoding</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>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- 3.超时时间 -->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

  2. 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.xsd">

    <!-- mvc注解驱动 -->
    <mvc:annotation-driven />

    <!-- 让Spring MVC不处理静态资源 -->
    <mvc:default-servlet-handler/>
    
    <!-- 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>

    <!-- 自动扫描包，让指定包下的注解生效,由IOC容器统一管理 -->
    <context:component-scan base-package="com.ice.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="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>

</beans>

6. Controller 和视图层

  1. BookController 类编写

    package com.ice.controller;

import com.ice.pojo.Books;
import com.ice.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;

    // 查询全部书籍，并返回一个书籍展示页面
    @RequestMapping("/list")
    public String list(Model model) {
      
      
        List<Books> list = bookService.queryAllBooks();
        model.addAttribute("list", list);
        return "list";
    }

    @RequestMapping("/toAddBook")
    public String toAddBook() {
      
      
        return "addBook";
    }

    @RequestMapping("/add")
    public String add(Books book) {
      
      
        bookService.addBook(book);
        return "redirect:/book/list";
    }

    @RequestMapping("/toUpdateBook")
    public String toUpdateBook(Model model, int id) {
      
      
        Books book = bookService.queryBookById(id);
        model.addAttribute("book", book);
        return "updateBook";
    }

    @RequestMapping("/update")
    public String update(Model model, Books book) {
      
      
        bookService.updateBook(book);
        return "redirect:/book/list";
    }

    @RequestMapping("/delete/{bookId}")
    public String delete(@PathVariable("bookId") int id) {
      
      
        bookService.deleteBookById(id);
        return "redirect:/book/list";
    }

}

  2. 编写首页 index.jsp

    <%@ 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/list">进入书籍页面</a></h3>
</body>
</html>

  3. 书籍列表页面 list.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>
    <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.getId()}</td>
                        <td>${book.getName()}</td>
                        <td>${book.getCounts()}</td>
                        <td>${book.getDetail()}</td>
                        <td>
                            <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getId()}">更改</a> |
                            <a href="${pageContext.request.contextPath}/book/delete/${book.getId()}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>
</body>
</html>

  4. 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/add" method="post">
        书籍名称：<input type="text" name="name"><br><br><br>
        书籍数量：<input type="text" name="counts"><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>

  5. 修改书籍页面 updateBook.jsp

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改书籍</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>新增信息</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="${pageContext.request.contextPath}/book/update" method="post">
        <input type="hidden" name="id" value="${book.getId()}"/>
        书籍名称：<input type="text" name="name" value="${book.getName()}"/>
        书籍数量：<input type="text" name="counts" value="${book.getCounts()}"/>
        书籍详情：<input type="text" name="detail" value="${book.getDetail() }"/>
        <input type="submit" value="提交"/>
    </form>

</div>
</body>
</html>

7. 配置 Tomcat 运行

在这里插入图片描述

8. 项目结构图

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