ssm整合

2023-11-24 09:23:28

ssm整合

1. 创建一个maven工程

  • 导入依赖
<!--依赖: junit, 数据库驱动, 连接池, servlet, jsp, jstl, mybatis, mybatis-spring, spring, spring-jdbc-->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.13</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.47</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.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2.1-b03</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.5</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>2.0.5</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.2.8.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.2.8.RELEASE</version>
</dependency>
  • 解决导出问题
<!--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>

2. 链接数据库

jdbc:mysql://localhost:3306?serverTimezone=GMT%2B8
  • 创建表
CREATE DATABASE `ssm`;
USE `ssm`;

/*Table structure for table `books` */
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 '描述',
  KEY `bookId` (`bookId`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

/*Data for the table `books` */
insert  into `books`(`bookId`,`bookName`,`bookCounts`) values (1,'Java',11),(2,'English',22),(3,'Math',33);

3. mybatis核心配置文件mybatis-config.xml

  • 在springDao.xml被引用
<?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,交给spring去做,变迁需要按顺序排-->
    <!--开启日志-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    <!--取别名,在Mapper中可以直接使用类名,如果没有需要使用全限名-->
    <typeAliases>
        <package name="com.jing.pojo"/>
    </typeAliases>
    <mappers>
        <!--<mapper resource="com/jing/dao/BookMapper.xml"/>-->
        <!--需要类名和xml名字一致,在同目录下-->
        <mapper class="com.jing.dao.BookMapper"/>
    </mappers>
</configuration>
  • 关联数据库db.properties
jdbc.driver=com.mysql.jdbc.Driver
#如果使用的是MySQL8.0+,需要增加时区配置serverTimezone=GMT%2B8;
#useUnicode=true&amp;characterEncoding=UTF-8&amp;解决中文乱码问题
jdbc.url=jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=GMT%2B8;
jdbc.username=root
jdbc.password=123456

  • 创建实体类和Mapper,以及Mapper.xml,在mybatis-config.xml中配置自动扫描包mappers

  • 创建sevice层,BookService和BookServiceImpl,需要注入Dao(springService.xml中注入)

  • Mapper.xml标签以及使用

4. spring核心配置文件applicationContext.xml

在web.xml被引用

<?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:springDao.xml"/>
    <import resource="classpath:springService.xml"/>
    <import resource="classpath:springMVC.xml"/>
</beans>

5. springDao.xml配置

spring-dao.xml不能被spring识别

<?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">

    <!--1.关联数据库配置文件-->
    <context:property-placeholder location="classpath:db.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的配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <!--4.配置dao接口扫描包,动态实现Dao接口-->
    <!--本来可以通过实现类BookMapperImpl,继承SqlSessionDaoSupport,
        注入SqlSessionTemplate,通过getSqlSession()获取-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入 sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--配置扫描包-->
        <property name="basePackage" value="com.jing.dao"/>
    </bean>
</beans>

6. springService.xml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
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">
    <!--1.扫描service下的包-->
    <context:component-scan base-package="com.jing.service"/>

    <!--2.将我们所有的业务类,注入到spring,可以通过配置,或者注解实现-->
    <bean id="BookServiceImpl" class="com.jing.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3.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>
</beans>

7. springMVC.xml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: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
       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">
    <!--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.jing.controller"/>
    <!--4,视图解析-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
       	<property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

8. web.xml配置

<?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">
    <!--DispatcherServlet-->
    <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>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <!--乱码过滤器-->
    <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>
</web-app>

9. controller和jsp交互

controller查询数据,并发送到视图层

 @Autowired
    private BookService bookService;
    //查询全部书籍
    @RequestMapping("/allBook")
    public String list(Model model){
        List<Books> books = bookService.queryAllBook();
        model.addAttribute("list", books);
        return "allBook";
    }

jsp接收并展示数据(Model中取)

<c:forEach var="book" items="${list}">
    <tr>
        <td>${book.bookId}</td>
        <td>${book.bookName}</td>
        <td>${book.bookCounts}</td>
    </tr>
</c:forEach>

10. 打包运行

添加war文件

添加lib文件夹以及相应jar包

11. 通过Junit来调试

@Test
public void test(){
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    BookServiceImpl bookServiceImpl=(BookServiceImpl)context.getBean("BookServiceImpl");
    List<Books> books = bookServiceImpl.queryAllBook();
    for (Books book : books) {
        System.out.println(book);
    }
}

数据库乱码解决https://www.freesion.com/article/91021038673/

修改完重启服务
ssm整合

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