SSM整合(详解)

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

DROP DATABASE
IF EXISTS ssm;

CREATE DATABASE ssm;
USE ssm;

CREATE TABLE books (
	bookId INT (10) PRIMARY KEY auto_increment COMMENT "书id",
	bookName VARCHAR (100) NOT NULL COMMENT '书名',
	bookCounts INT (10) NOT NULL COMMENT '数量',
	detail VARCHAR (200) NOT NULL COMMENT '描述'
)ENGINE=INNODB DEFAULT CHARSET=utf8;

#ENGINE=InnoDB  数据库存储引擎
#DEFAULT 默认
#CHARSET=utf8 数据库字符编码

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');
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

在这里插入图片描述

基本环境搭建

一、导入相关的pom依赖！


    <dependencies>
        
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>4.13.2version>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>8.0.28version>
        dependency>
        
         <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druidartifactId>
            <version>1.2.8version>
        dependency>
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>5.3.22version>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>servlet-apiartifactId>
            <version>2.5version>
        dependency>
        <dependency>
            <groupId>javax.servlet.jspgroupId>
            <artifactId>jsp-apiartifactId>
            <version>2.2version>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>jstlartifactId>
            <version>1.2version>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.5.7version>
        dependency>
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
            <version>2.0.7version>
        dependency>
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-jdbcartifactId>
            <version>5.3.22version>
        dependency>
    dependencies>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59


    <build>
        <resources>
            <resource>
                <directory>src/main/javadirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
            <resource>
                <directory>src/main/resourcesdirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
        resources>
    build>
project>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

二、完成MVC

1、添加web程序

右键项目–> 点击Add Framework Support（框架支持）–> 勾选第一个选项，点击ok！

2、配置web.xml


<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">
    
    <servlet>
        <servlet-name>springmvcservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
        
            <param-value>classpath:applicationContext.xmlparam-value>
        init-param>
        <load-on-startup>1load-on-startup>
    servlet>
    <servlet-mapping>
        <servlet-name>springmvcservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>

    
    <filter>
        <filter-name>encodingfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        <init-param>
            <param-name>encodingparam-name>
            <param-value>utf-8param-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>encodingfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>
web-app>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

3、在资源包下创建spring-mvc.xml


<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
">

    
    <context:component-scan base-package="com.jin.controller"/>
    
    <mvc:default-servlet-handler/>
    
    <mvc:annotation-driven/>

    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    bean>
beans>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

4、建立基本结构

在这里插入图片描述 .

1）实体类（pojo）

public class Book {

    private Integer bookID;
    private String bookName;
    private Integer bookCounts;
    private String detail;
 
//            ..(有参无参)..
//    ..(Setter和Getter方法)..
//        ..(toString方法)..
}    
1
2
3
4
5
6
7
8
9
10
11

2）数据持久层（dao）

//接口BookMapper
public interface BookMapper {
    //增加一本书
    int addBook(Book book);
    //删除一本书
    int deleteBookById(int id);

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

    //查询一本书
    Book queryBookById(int id);

    //查询全部的书
    List<Book> queryBook();
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

BookMapper.xml


DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.jin.dao.BookMapper">
    <insert id="addBook" parameterType="Book">
        insert into ssm.books (bookName, bookCounts, detail)
        values (#{bookName},#{bookCounts},#{detail});
    insert>

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

    <update id="updateBook" parameterType="Book">
        update ssm.books
        set bookName = #{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookId=#{bookId};
    update>

    <select id="queryBookById" resultType="Book" parameterType="int">
        select *
        from ssm.books where bookId = #{bookId};
    select>

    <select id="queryBook" resultType="Book">
        select *
        from ssm.books;
    select>
mapper>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

3）服务层（service）

package com.jin.service;

import com.jin.pojo.Book;

import java.util.List;

public interface BookService {
    //增加一本书
    int addBook(Book book);
    //删除一本书
    int deleteBookById(int id);

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

    //查询一本书
    Book queryBookById(int id);

    //查询全部的书
    List<Book> queryBook();
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

访问层接口实现（BookServiceImpl）

package com.jin.service;

import com.jin.dao.BookMapper;
import com.jin.pojo.Book;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class BookServiceImpl implements BookService{

    //service层调dao层，组合Dao
  @Autowired
  private BookMapper bookMapper;

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

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

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

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

    @Override
    public List<Book> queryBook() {
        return bookMapper.queryBook();
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

4）业务层（controller）

package com.jin.controller;

import com.jin.pojo.Book;
import com.jin.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.RequestMapping;
import java.util.List;

//@RestController = @ResponseBody + @Controller
@Controller

public class BookController {
    //controller 调 service 层
    @Autowired
    private BookService bookService;

    //查询全部的书籍，并且返回到一个书籍展示页面
    @RequestMapping("/a1")
    public String test(Model model){

        List<Book> list = bookService.queryBook();
        model.addAttribute("list", list);
        return "allBook";
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

以上我们就完成了SpringMVC的基本操作！

以下就是关于我们整合Mybatis-Spring-SpringMVC（SSM）框架

三、整合SSM

1、Mybatis框架（mybatis-config.xml）


DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    
    
    <typeAliases>
        <package name="com.jin.pojo"/>
    typeAliases>

    
    <mappers>
        <mapper class="com.jin.dao.BookMapper"/>
    mappers>
configuration>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

2、Spring整合MyBatis （spring-dao.xml）


<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">

    
    <context:property-placeholder location="classpath:db.properties"/>
    
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}">property>
        <property name="url" value="${jdbc.url}">property>
        <property name="username" value="${jdbc.username}">property>
        <property name="password" value="${jdbc.password}">property>
    bean>

    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    bean>

    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        
        <property name="basePackage" value="com.jin.dao"/>
    bean>
beans>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

3、数据库配置文件（db.properties）

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/one_class?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456
1
2
3
4

4、spring-service.xml


<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">

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

    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        
        <property name="dataSource" ref="dataSource"/>
    bean>

beans>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

5、Spring配置整合文件（applicationContext.xml）


<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-mvc.xml"/>
    <import resource="classpath:spring-service.xml"/>
beans>
1
2
3
4
5
6
7
8
9

四、显示页面

1、首页（index.jsp）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>首页title>
    <style>
        a{
            text-decoration: none;
            color: black;
            font-size: 18px;
        }
        h3{
            width: 280px;
            height: 48px;
            margin: 200px auto;
            text-align: center;
            line-height: 48px;
            background: deepskyblue;
            border-radius: 5px;
        }
    style>
head>
<body>
 <h3>
     <a href="${pageContext.request.contextPath}/a1">进入书籍页面a>
 h3>
body>
html>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

2、展示页面（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>书籍展示title>
    <link href="https://cdn.staticfile.org/twitter-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 clearfix">
        <div class="col-md-12 column">
            <table class="table table-hover table-striped">
                <thead>
                <tr>
                    <th>书籍编号th>
                    <th>书籍姓名th>
                    <th>书籍数量th>
                    <th>书籍详情th>
                tr>
                thead>

                <%--书籍从数据库中查询出来，从这个list中遍历出来：foreach--%>
                <tbody>
                <c:forEach var="book" items="${list}">
                    <tr>
                        <td>${book.bookID}td>
                        <td>${book.bookName}td>
                        <td>${book.bookCounts}td>
                        <td>${book.detail}td>
                    tr>
                c:forEach>
                tbody>
            table>

        div>
    div>
div>
body>
html>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

3、效果如图：