ssm框架整合

案例：使用ssm框架完成对 account 表的增删改查操作。

1. 准备数据库和表记录

USE `spring_db`;
CREATE TABLE `account` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`name` VARCHAR(32) DEFAULT NULL,
`money` DOUBLE DEFAULT NULL,
PRIMARY KEY (`id`)
) ;
INSERT INTO `account`(`id`,`name`,`money`) VALUES (1,'tom',1000),
(2,'jerry',1000);

2. 编写mybatis在ssm环境中可以单独使用

<!--mybatis坐标-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.15</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>

基于mybatis先来实现对account表的查询

<?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>

<!-- 导入jdbc配置-->
    <properties resource="jdbc.properties"></properties>
<!-- 起别名-->
    <typeAliases>
        <package name="com.domain"/>
    </typeAliases>
<!-- 运行环境配置-->
    <environments default="runmybatis">
        <environment id="runmybatis">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
<!-- 映射文件配置-->
    <mappers>
        <mapper resource="dao/AccountDao"></mapper>
    </mappers>

</configuration>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dao.AccountDao">
    <select id="findAll" resultType="com.domain.Account">
        select * from account;
    </select>
</mapper>

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring_db?CharacterEncoding=UTF-8&useSSL=false
jdbc.username=root
jdbc.password=123456

package com.dao;

import com.domain.Account;

import java.util.List;

public interface AccountDao {
    public List<Account> findAll();
}

package com.domain;

public class Account {

    private int id;
    private String  name;
    private double money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getMoney() {
        return money;
    }

    public void setMoney(double money) {
        this.money = money;
    }
}

package com.test;

import com.alibaba.druid.pool.DruidDataSource;
import com.dao.AccountDao;
import com.domain.Account;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MybatisTest {

    @Test
    public void testFindAll() throws IOException {
        InputStream resource = Resources.getResourceAsStream("SqlMapConfig.xml");
        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(resource);
        SqlSession sqlSession = sessionFactory.openSession();
        AccountDao mapper = sqlSession.getMapper(AccountDao.class);
        List<Account> list = mapper.findAll();
        for (Account account : list) {
            System.out.println(account);
        }
    }
}

2. spring整合mybatis

<?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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">

<!-- 开启注解扫描-->
    <context:component-scan base-package="com.service"/>
<!-- 导入配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

<!--  dataSource-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

<!--  mybatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
    <property name="typeAliasesPackage" value="com.domain"></property>
<!-- 也可以直接读mybatis配置文件-->
<!--    <property name="configLocation" value="classpath:SqlMapConfig.xml"/>-->
</bean>

    <!--映射接口扫描配置，由spring创建代理对象，交给IOC容器-->
    <bean  class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.dao"></property>
    </bean>
</beans>

<!-- spring配置-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.1.5.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.8.13</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.1.5.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>5.1.5.RELEASE</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>5.1.5.RELEASE</version>
    </dependency>

<!--spring整合mybatis-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.3.1</version>
    </dependency>
</dependencies>

@Service("accountService")
public class AccountServiceImp implements AccountService {

    @Autowired
   private AccountDao accountDao;

    public List<Account> findAll() {
        List<Account> list = accountDao.findAll();
        return list;
    }
}

package com.test;

import com.dao.AccountDao;
import com.domain.Account;
import com.service.AccountService;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;


import java.io.IOException;
import java.io.InputStream;
import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class MybatisTest {

 @Autowired
    AccountService accountService;
    @Test
    public void testFindAllspring() throws IOException {
        List<Account> list = accountService.findAll();
        for (Account account : list) {
            System.out.println(account);
        }
    }
}

5. 编写springMVC在ssm环境中可以单独使用

 

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--组件扫描-->
<context:component-scan base-package="com.lagou.controller"/>
<!--mvc注解增强-->
<mvc:annotation-driven/>
<!--视图解析器-->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--实现静态资源映射-->
<mvc:default-servlet-handler/>
</beans>

@RequestMapping("/findAll")
    public String findAll(Model model){
        List<Account> list = new ArrayList<>();
        list.add(new Account(1,"张三",1000d));
        list.add(new Account(2,"李四",1000d));
        model.addAttribute("list",list);
        return "list";
    }

<?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_3_1.xsd"
version="3.1">
<!--前端控制器-->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servletclass>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--post中文处理-->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filterclass>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>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

<c:forEach items="${list}" var="account">
<tr>
<td>
<input type="checkbox" name="ids">
</td>
<td>${account.id}</td>
<td>${account.name}</td>
<td>${account.money}</td>
<td>
<a class="btn btn-default btn-sm" href="update.jsp">修改</a>&nbsp;
<a class="btn btn-default btn-sm" href="">删除</a>
</td>
</tr>
</c:forEach>

6. spring整合springMVC,web容器整合

可以使用spring-web包中的ContextLoaderListener监听器，可以监听servletContext容器的创建和销毁，来同时创建或销毁IOC容器

<!--spring 与 web容器整合-->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

7.spring配置声明式事务

<!--事务管理器-->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--开启事务注解支持-->
<tx:annotation-driven/>

@Service
@Transactional
public class AccountServiceImpl implements AccountService {
}