SSM框架整合

环境： Maven3.92 、 Mysql8.0、Tomcat7.0
数据库

/*
 Navicat Premium Data Transfer

 Source Server         : Graude
 Source Server Type    : MySQL
 Source Server Version : 80035 (8.0.35)
 Source Host           : localhost:3306
 Source Schema         : ssmbuild

 Target Server Type    : MySQL
 Target Server Version : 80035 (8.0.35)
 File Encoding         : 65001

 Date: 01/04/2024 16:15:39
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for books
-- ----------------------------
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books`  (
  `bookID` int NOT NULL AUTO_INCREMENT,
  `bookName` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
  `bookCounts` int NULL DEFAULT NULL,
  `detail` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
  PRIMARY KEY (`bookID`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of books
-- ----------------------------
INSERT INTO `books` VALUES (1, 'Java', 1, '从入门到入土');
INSERT INTO `books` VALUES (2, 'MySQL', 2, '从删库到跑路');

SET FOREIGN_KEY_CHECKS = 1;

导入环境依赖

<!--导入依赖：mysql,junit,连接池,servlet,jsp,spring,mybatis,mybatis-spring-->
    <dependencies>
           <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.33</version>
        </dependency>
        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.1</version>
            <scope>test</scope>
        </dependency>
        <!--数据库连接池-->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <!--servlet-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <!--jsp-->
        <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>3.5.9</version>
        </dependency>
        <!--mybatis-spring-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.5</version>
        </dependency>
        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.27</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.8</version>
        </dependency>
    </dependencies>

静态资源导出问题

<!--静态资源导出问题-->
    <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>

一、配置Mybatis

配置mybatis-config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>
         <!--配置数据源，现在交给Spring做-->

    <!--配置别名-->
    <typeAliases>
        <package name="com.wfy.pojo"/>
    </typeAliases>

    <mappers>
        <mapper class="com.wfy.dao.BookMapper"/>
    </mappers>
</configuration>

properties文件

使用的是mysql8.0以上的版本，url要配置时区

配置完成后，测试数据库连接

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=root

配置实体类(pojo)

package com.wfy.pojo;

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

@Data //使用该注解需要导入lombok依赖，偷懒用的
@AllArgsConstructor//有参构造
@NoArgsConstructor//无参构造
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

dao层（数据访问层）

BookMapper

package com.wfy.dao;

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

import java.util.List;

public interface BookMapper {
    //增
     int addBook(Books books);
    //删
    int deleteBook(@Param("bookID") int bookID);
    //改
    int updateBook(Books books);
    //查(一本)
    Books queryBookById(@Param("bookID")int bookID);
    //查（全部）
    List<Books> queryAllBook();
}

BookMapper.xml映射文件

<?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.wfy.dao.BookMapper">

       <!--增-->
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books( bookName, bookCounts, detail)
        values(#{bookName},#{bookCounts},#{detail})
    </insert>
        <!--删-->
    <delete id="deleteBook" parameterType="int" >
        delete from ssmbuild.books where bookID=#{bookID}
    </delete>
    <!--改-->
    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookID=#{bookID}
    </update>
    <!--查-->
    <select id="queryBookById" resultType="Books">
        select * from ssmbuild.books
                 where bookID=#{bookID}
    </select>
    <!--查所有-->
    <select id="queryAllBook" resultType="Books">
        select * from ssmbuild.books
    </select>

</mapper>

service层（业务层）

利用service层去调用dao层，最大的作用就是解耦

即一个service层可以调用多个dao层

接口Bookservice

package com.wfy.service;
import com.wfy.pojo.Books;
import java.util.List;

public interface BookService {
    //增
    int addBook(Books books);
    //删
    int deleteBook( int bookID);
    //改
    int updateBook(Books books);
    //查(一本)
    Books queryBookById(int bookID);
    //查（全部）
    List<Books> queryAllBook();
}

BookseviceImpl

package com.wfy.service;

import com.wfy.dao.BookMapper;
import com.wfy.pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService{
    //service层调用dao层：组合dao层
    private BookMapper bookMapper;

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

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

    @Override
    public int deleteBook(int bookID) {
        return bookMapper.deleteBook(bookID);
    }

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

    @Override
    public Books queryBookById(int bookID) {
        return queryBookById(bookID);
    }

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

二、配置Spring

2.1、spring-dao层配置

<?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">

    <!--1.关联数据库配置文件-->
    <context:property-placeholder location="classpath:db.properties"/>

    <!--2.连接池-->
    <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>

    <!--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>

    <!--4.配置dao接口扫描包，动态的实现了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"/>
        <!--要扫描的dao包-->
        <property name="basePackage" value="com.wfy.dao"/>
    </bean>

</beans>

2.2、spring-service层配置

<?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">

    <import resource="classpath:spring-dao.xml"/>
    <!--1.扫描service下的包-->
    <context:component-scan base-package="com.wfy.service"/>
    <!--2.将所有的业务类，注入到Spring，可以通过配置，或者注解实现-->
    <!--通过配置实现-->
    <bean id="BookServiceImpl" class="com.wfy.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3.声明式事务配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
         <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--4.aop事务支持-->

</beans>

三、配置SpringMVC

<?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/mvc"
       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">

    <!--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="com.wfy.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>

三层整合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>