整合SSM(一)

SSM整合

数据库环境

创建存放书籍的数据库

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');

如下图：

基本环境搭建

1、新建一个maven项目ssmbuild，添加web的支持

2、导入所需的依赖

<dependencies>
    <!--aop-->
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.4</version>
    </dependency>
    <!--lombok-->
    <dependency>
        <groupId>org.projectLombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.10</version>
    </dependency>
    <!--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 c3p0 -->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.2</version>
    </dependency>
    <!--Servlet - JSP - Jstl -->
    <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>2.0.3</version>
    </dependency>
    <!--Spring-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.2.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.2.1.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.star.controller
• com.star.dao
• com.star.pojo
• com.stat.service
• 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-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>

• dataBase.properties

MyBatis层编写

1、数据库配置文件编写

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
username=root
password=123456

2、IDEA连接数据库

3、编写mybatis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.star.pojo"/>
    </typeAliases>

    <mappers>
        <mapper resource="com/star/dao/bookMapper.xml"/>
    </mappers>
    
</configuration>

4、编写数据库对应的实体类 com.star.pojo.books

package com.star.pojo;

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

@Data
@AllArgsConstructor
@NoArgsConstructor
public class books {
    private int bookID;
    private String booName;
    private int bookCounts;
    private String  detail;
}

5、编写Dao层对应得Mapper接口

package com.star.dao;

import com.star.pojo.books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface bookMapper {

    // 添加一本书
    public int addBook(books book);

    // 通过id删除一本书
    public int deleteBookByID(@Param("bookID") int id);

    // 修改一本书
    public int updateBook(books books);

    // 查找所有的书
    public List<books> queryAllBooks();

    // 通过id查找一本书
    public books queryBookById(@Param("bookID") int id);

}

6、编写对应得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.star.dao.bookMapper">

    <insert id="addBook" parameterType="books">
        insert into ssmbuild.books (bookName, bookCounts, detail) values (#{bookName},#{bookCounts},#{detail});
    </insert>

    <delete id="deleteBookByID" parameterType="int">
        delete from ssmbuild.books where bookID=#{bookID};
    </delete>

    <update id="updateBook" parameterType="books">
        update ssmbuild.books set bookName=#{bookName}, bookCounts=#{bookCounts}, detail=#{detail} where bookID=#{bookID};
    </update>

    <select id="queryAllBooks" resultType="books">
        select * from ssmbuild.books;
    </select>

    <select id="queryBookById" parameterType="int" resultType="books">
        select * from ssmbuild.books where bookID=#{bookID};
    </select>
</mapper>

7、编写Service层对应的接口和实现类

接口：

package com.star.service;

import com.star.pojo.books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface bookService {

    // 添加一本书
    public int addBook(books book);

    // 通过id删除一本书
    public int deleteBookByID(@Param("bookID") int id);

    // 修改一本书
    public int updateBook(books books);

    // 查找所有的书
    public List<books> queryAllBooks();

    // 通过id查找一本书
    public books queryBookById(@Param("bookID") int id);
}

实现类：

package com.star.service;

import com.star.dao.bookMapper;
import com.star.pojo.books;

import java.util.List;

public class bookServiceImpl implements bookService {

    private bookMapper bookMapper;

    public void setBookMapper(com.star.dao.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 List<books> queryAllBooks() {
        return bookMapper.queryAllBooks();
    }

    public books queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }
}

OK！到这里底层需求操作编写完成；

Spring层

1、关联数据库文件

<context:property-placeholder location="classpath:dataBase.properties"/>

2、配置数据库连接池

    <bean name="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"/>
        <!-- 关闭连接后自动提交事物 -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="1000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireIncrement" value="2"/>
    </bean>

3、配置SqlSessionFactory

    <bean name="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 配置MyBatis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

    <bean name="scannerConfigurer" 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.star.dao"/>
    </bean>

5、将service层的所有业务注入到spring中

    <bean id="bookServiceImpl" class="com.star.service.bookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

6、配置声明式事务

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--aop事务支持-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!--给哪些方法配置事务   配置事务的传播特性-->
        <tx:attributes>
            <!--* 表示给所有的方法配置事务     REQUIRED 默认的传播特性-->
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <aop:config>
        <!--所用类的所有方法-->
        <aop:pointcut id="txPointcut" expression="execution(* com.star.dao.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
    </aop:config>

SpringMVC层

1、编写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">

    <!--核心处理器-->
    <servlet>
        <servlet-name>DispatcherServlet</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>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--乱码过滤器-->
    <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>

    <!--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
       https://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd 
       http://www.springframework.org/schema/mvc 
       https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--扫描配置包-->
    <context:component-scan base-package="com.star.controller"/>
    <!--配置mvc注解驱动-->
    <mvc:annotation-driven/>
    <!--静态资源默认配置-->
    <mvc:default-servlet-handler/>

    <!--视图解析器-->
    <bean id="viewResolver" 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-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>

</beans>