526互联

整合SSM

发布时间 2023-07-27 17:31:39作者: 努力的小L

整合SSM

数据库

CREATE DATABASE ssmbuild;
USE ssmbuild;
CREATE TABLE `books`(
`bookID` INT NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT 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Maven项目。ssmbuild，添加web支持。

  2. 导入相关的pom支持。

    <?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>org.example</groupId>
    <artifactId>ssmbulid</artifactId>
    <version>1.0-SNAPSHOT</version>

<!--依赖:junit,数据库驱动，连接池，servlet,jsp,mybatis,mybatis-spring,spring-->
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.21</version>
        </dependency>
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <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>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.20</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9</version>
        </dependency>
    </dependencies>

</project>

  3. 静态资源导出问题。

    <!--静态资源导出-->
<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.pojo

    • com.dao

    • com.service

    • com.controller

    • mybatis-congif.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
       https://www.springframework.org/schema/beans/spring-beans.xsd ">
       
</beans>

Mybatis层编写

  1. 数据库文件配置 database.properties

    jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf-8
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>
<!--配置数据资源，交给spring去做-->
    <typeAliases>
        <package name="pojo"/>
    </typeAliases>
    <mappers>
        <mapper class="dao.BookMapper"/>
    </mappers>
</configuration>

  4. 编写数据库对应的实体类 pojo.Books

    package 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 dao;

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

import java.util.List;

public interface BookMapper {
    //增加一本书
    int addBook(Books books);
    //删除一本书
    int deleteBookId(@Param("bookId") int id);
    //修改一本书
    int updateBook(Books books);
    //查询一本书
    Books queryBookById(int id);
    //查询全部的书
    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 Config 3.0/EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="dao.BookMapper">
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books(bookName,bookCounts,detail)
        values (#{bookName},#{bookCounts},#{detail});
    </insert>
    <delete id="deleteBookId" parameterType="int">
        delete from ssmbuild.books where bookID=#{bookId}
    </delete>
    <update id="updateBook" parameterType="Books">
        update ssmbuile.books
        set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookID=#{bookID};
    </update>
    <select id="queryBookById" resultType="Books">
        select * from ssmbuild.books
        where bookID=#{bookId}
    </select>
    <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 service;

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

import java.util.List;

public interface BookService {
    public interface BookMapper {
        //增加一本书
        int addBook(Books books);
        //删除一本书
        int deleteBookId(int id);
        //修改一本书
        int updateBook(Books books);
        //查询一本书
        Books queryBookById(int id);
        //查询全部的书
        List<Books> queryAllBook();
    }
}

    实现类：

    package service;

import pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService{
    //service调用dao层
    private BookMapper bookMapper;
    public void setBookMapper(BookMapper bookMapper){
        this.bookMapper=bookMapper;
    }
    public int addBooks(Books books){
        return bookMapper.addBook(books);
    }
    public int deleteBookById(int id){
        return bookMapper.deleteBookId(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的相关配置文件：spring-dao.xml
  
     ```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
            https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
     <!--1.关联数据库配置文件-->
         <context:property-placeholder location="classpath:database.properties"/>
     <!--2.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
     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"/>
     <!--关闭连接池后不自动commit-->
             <property name="autoCommitOnClose" value="false"/>
     <!--获取连接超时事件-->
             <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配置文件-->
             <property name="configLocation" value="classpath:mybatis-config.xml"/>
         </bean>
     <!--配置dao接口扫描包，动态实现了Dao接口可以注入到Spring容器中-->
         <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
     <!--注入sqlSessionFactory-->
             <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
     <!--要扫描的dao包-->
             <property name="basePackage" value="dao"></property>
         </bean>
     </beans>
     ```
  
  3. spring整合service层
  
     ```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
            https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
     <!--扫描service下的包-->
         <context:component-scan base-package="service"/>
     <!--将我们的所有业务类注入到spring，可以通过配置，或者注解实现-->
         <bean id="BookServiceImpl" class="service.BookServiceImpl">
             <property name="bookMapper" ref="bookMapper"/>
         </bean>
     <!--声明式事务配置-->
         <bean id="transcationManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManger">
     <!--注入数据源-->
             <property name="dataSource" ref="dataSource"/>
         </bean>
     </beans>
     ```
  
  4.

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">
<!-- DispatchServlet-->
    <servlet>
        <servlet-name>springmvc</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>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
<!--乱码过滤-->
    <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-->
    <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:mvc="http://www.springframework.org/schema/tool"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       https://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/tool
       http://www.springframework.org/schema/tool/spring-tool.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.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="controller"/>
<!--4.视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <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
       https://www.springframework.org/schema/beans/spring-beans.xsd ">
<import resource="classpath:spring-mvc.xml"/>
    <import resource="spring-dao.xml"/>
    <import resource="spring-service.xml"/>
</beans>

案例

  1. BookController类编写。方法一:查询全部书籍

    @Controller
@RequestMapping("/book")
public class BookController {
    //Controller调service层
    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;
    //查询全部的书籍，并且返回到一个书籍展示页面
    @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 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: 130px;
        height: 38px;
        margin: 100px auto;
        text-align: center;
        line-height: 38px;
        background: deepskyblue;
        border-radius: 5px;
      }
    </style>
  </head>
  <body>
  <h3>
    <a href="${pageContext.request.contextPath}/book/allBook">跳转到书籍页面</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>书记展示页面</title>
<%--BookStart美化界面--%>
    <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>书籍展示——显示所有书籍</h1>
           </div>
       </div>
   </div>
    <div class="row">
        <div class="col-md-4 column" >
            <a href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
        </div>
    </div>

</div>
<div class="row clearfix">
    <div class="col-md-12 column">
        <table class="table table-hover table-striped">
            <thead>
            <th>书籍编号</th>
            <th>书籍名称</th>
            <th>书籍数量</th>
            <th>书籍详情</th>
            </thead>
            <tbody>
            <c:forEach var="book" items="${list}">
                <tr>
                    <td>${book.bookID}</td>
                    <td>${book.bookName}</td>
                    <td>${book.bookCounts}</td>
                    <td>${book.detail}</td>
                    <td>
                        <a href="${pageContext.request.contextPath}/book/toUpdate?id=${book.bookID}">修改</a>
                        &nbsp;|&nbsp;
                        <a href="${pageContext.request.contextPath}/book/deleteBook?id=${book.bookID}">删除</a>
                    </td>
                </tr>
            </c:forEach>
            </tbody>
        </table>
    </div>
</div>
</body>
</html>

  4. BookController类编写。方法二:添加书籍

     @RequestMapping("/toAddBook")
    public String toAddPaper(){
        return "addBook";
    }
    //添加书籍的请求
    @RequestMapping("/addBook")
    public String addBook(Books books){
        System.out.println("addBook=>"+books);
        bookService.addBook(books);
        return "redirect:/book/allBook";//重定向到我们的@RequestMapping("/allBook")请求
    }

  5. 添加书籍页面：addBook.jsp

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <%--BookStart美化界面--%>
    <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>新增书籍</small>
                </h1>
            </div>
        </div>
    </div>
</div>
<form action="">
    <div class="form-group">
        <label>书籍名称：</label>
        <input type="text" class="form-control">
    </div>
    <div class="form-group">
        <label>书籍数量：</label>
        <input type="text" class="form-control" >
    </div>
    <div class="form-group">
        <label>书籍描述：</label>
        <input type="text" class="form-control" >
    </div>
    <div class="form-group">
        <input type="submit" class="form-control" value="添加">
    </div>
</form>
</body>
</html>

  6. BookController类编写。方法三:修改书籍

     //跳转到修改页面
    @RequestMapping("/toUpdate")
    public String toUpdatePaper(int id){
        Books books=bookService.queryBookById(id);
        model.addAttribute("QBook",books);
        return  "updateBook";
    }
    //修改书籍
    @RequestMapping("/updateBook")
    public String updateBook(Books books){
        System.out.println("updateBook=>"+books);
        bookService.updateBook(books);
        return "redirect:/book/allBook";
    }

  7. 修改书籍页面updateBook.jsp

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <%--BookStart美化界面--%>
    <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>新增书籍</small>
                </h1>
            </div>
        </div>
    </div>
</div>
<form action="">
    <div class="form-group">
        <label>书籍名称：</label>
        <input type="text" class="form-control">
    </div>
    <div class="form-group">
        <label>书籍数量：</label>
        <input type="text" class="form-control" >
    </div>
    <div class="form-group">
        <label>书籍描述：</label>
        <input type="text" class="form-control" >
    </div>
    <div class="form-group">
        <input type="submit" class="form-control" value="添加">
    </div>
</form>
</body>
</html>

  8. BookController类编写。方法四:删除书籍

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

配置Tomcat,进行运行。

项目结构图