SSM之整合 环境搭建Spring SpringMVC MyBatis

其他 2020-10-18 10:19:55 阅读次数: 0

学习目标

  • SSM整合
  • CRUD（增删查改）

ssm整合说明

  • SSM框架包括Spring，SpringMVC，Mybatis
  • 要首先搭建好SSM环境，才能再去开发其他环境
  • 整合思路：
    1先搭建整合的环境
    2把Spring的配置搭建好
    3使用Spring整合SpringMVC框架
    4最后使用Spring整合Mybatis框架
  • 整合方式XML+注解的方式
  • 流程图
    在这里插入图片描述

SSM搭建环境

（1）数据库创建ssm
（2）创建maven工程
（3）properties给谁用？
（4）依赖框架
（5）log4j

SQL

create database ssm;
use ssm;
create table person(
id int primary key auto_increment, 
`name` varchar(20),
money double
);

pom.xml

 <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <spring.version>5.2.9.RELEASE</spring.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mysql.version>5.1.6</mysql.version>
        <mybatis.version>3.4.5</mybatis.version>
    </properties>

    <dependencies>
        <!-- spring -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <!-- log end -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>

        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
    </dependencies>

log4j.properties

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:ssm.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

整合Spring框架并测试代码IOC&DI

  • 编写业务类调用测试逻辑
    TestPersonService
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class TestPersonService {
    
    
    private static final Logger log = Logger.getLogger(TestPersonService.class.getName());
    @Autowired
    IPersonService personService;
    @Test
    public void test01(){
    
    //编写两个业务功能，查询所有person，保存person
        //创建业务对象
        //IPersonService personService = new PersonServiceImpl();
        log.info(personService+"");
        //调用查询
        List<Person> list = personService.findAll();
        log.info(list+"");
        Person person = new Person("sun",150.00);
        personService.save(person);
        List<Person> list1 = personService.findAll();
        log.info(list1+"");
    }
    @Test
    public void test02(){
    
    //DI
        System.out.println(personService);
    }

IPersonService

public interface IPersonService {
    
    
    //显示所有的person数据
    List<Person> findAll();
    //保存一个person数据
    void save(Person person);
}

PersonServiceImpl

@Service
public class PersonServiceImpl implements IPersonService {
    
    
    @Qualifier("IPersonDao")
    @Autowired
    IPersonDao ipersonDao;
    @Override
    public List<Person> findAll() {
    
    
        //IPersonDao personDao = new PersonImpl;
        List<Person> list = ipersonDao.findAll();
        return list;
    }

    @Override
    public void save(Person person) {
    
    
        ipersonDao.save(person);
    }
}

Person

 private Integer id;
    private String name;
    private Double money;
  • 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"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/aop
	http://www.springframework.org/schema/aop/spring-aop.xsd
	http://www.springframework.org/schema/tx
	http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--   设置扫描包，包下设置注解@Service @Repository @Component @AutoWried-->
    <context:component-scan base-package="com.wxx">
        <!--    由于springmvc的controller是由springmvc来扫描，需要将controller排除在外-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>
  • 验证DI
    IPersonDao
List<Person> findAll();

    void save(Person person);

PersonDaoImpl

@Repository
public class PersonDaoImpl implements IPersonDao {
    
    
    @Override
    public List<Person> findAll() {
    
    
        System.out.println("find All");
        return null;
    }
    @Override
    public void save(Person person) {
    
    
        System.out.println("save");
    }
}

Spring整合SpringMVC的框架

  • web.xml中配置前端控制器DispatcherServlet
    SpringMVC的核心就是DispatcherServlet，DispatherServlet实质是一个HttpServlet。DispatherServlet负责将请求分发，所有的请求都经过他来统一分发
  • web.xml中配置编码过滤器CharacterEncodingFilter
    在SpringMVC中，框架直接提供了一个用来解决请求和响应乱码问题的过滤器CharacterEncodingFilter
  • web.xml中配置编码监听器ContextLoaderListener
    配置文件中ContextLoaderListener作为监听器，会监听web容器相关事件，在web容器启动或者关闭时触发执行响应程序

web.xml 配置DispatcherServlet，CharacterEncodingFilter,ContextLoaderListener

  <!--设置配置文件的路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!--解决中文乱码的过滤器-->
  <filter>
    <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!--配置Spring的监听器，默认只加载WEB-INF目录下的applicationContext.xml配置文件-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>



  <!--配置前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--加载springmvc.xml配置文件-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <!--启动服务器，创建该servlet-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

SpringMVC中配置视图解析器，组件扫描，注解驱动，对资源文件的放行

<?xml version="1.0" encoding="UTF-8"?>
<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">

    <!--开启注解扫描，只扫描Controller注解-->
    <context:component-scan base-package="com.wxx">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!--配置的视图解析器对象-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--过滤静态资源-->
    <mvc:resources location="/css/" mapping="/css/**" />
    <mvc:resources location="/images/" mapping="/images/**" />
    <mvc:resources location="/js/" mapping="/js/**" />

    <!--开启SpringMVC注解的支持-->
    <mvc:annotation-driven/>

</beans>

编写PersonController测试

PersonController

@Controller
@RequestMapping("/person")
public class PersonController {
    
    
    @Autowired
    private IPersonService personService;

    @RequestMapping(path="/list",method = RequestMethod.GET)
    public String list(Model model){
    
    
        //显示所有的person数据
        List<Person> list = personService.findAll();
        System.out.println("list() list= "+list);
        //数据放在Model对象，由Model传给页面
        model.addAttribute("list",list);//参1 key  参2 value
        return "list";
    }
}

编写list.jsp页面进行数据展示

WEB-INF/pages/list.jsp

<table border="1px" width="100%">
    <c:forEach items="${list}" var="person">
    <tr>
        <td>${person.id}</td>
        <td>${person.name}</td>
        <td>${person.money}</td>
    </tr>
    </c:forEach>

Spring整合Mybatis

配置Mybatis

  • 指定四大信息：账号密码ip端口 指定domain别名 指定映射文件
    SqlMapConfig.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>
     别名  com.wxx.domain.Person  person
    <typeAliases>
        <package name="com.wxx.domain"/>
    </typeAliases>
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/ssm"/>
                <property name="username" value="root"/>
                <property name="password" value=""/>
            </dataSource>
        </environment>
    </environments>
    <!-- 核心 配置文件扫描到映射文件-->
    <mappers>
        <package name="com.wxx.dao"/>
    </mappers>
</configuration>

编写测试（查询 保存）

  • TestMyBatis
public class TestMyBatis {
    
    
    private SqlSession session;
    @Before
    public void init(){
    
    
        // 加载配置文件
        InputStream in = TestMyBatis.class.getClassLoader().getResourceAsStream("SqlMapConfig.xml");
        // 创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建SqlSession对象
        session = factory.openSession();
    }
    @After
    public void destroy(){
    
    
        session.commit();
        session.close();
    }
    @Test
    public void test01(){
    
    
        //核心对象是session
        //Mybatis的特点是代码与sql分开的，需要映射文件
        IPersonDao dao = session.getMapper(IPersonDao.class);
        List<Person> list =dao.findAll();
        System.out.println(list);
    }
    @Test
    public void test02(){
    
    
        IPersonDao dao =session.getMapper(IPersonDao.class);
        Person p = new Person("Tom",2000.00);
        dao.save(p);
    }
}

IPersonDao.xml

<?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.wxx.dao.IPersonDao">
    <select id="findAll" resultType="person">
        select * from person;
    </select>
    <insert id="save" parameterType="person">
        insert into person (name,money) values (#{name},#{money});
    </insert>
</mapper>

Spring整合Mybatis框架

  • 需要添加jar包

pom.xml

<dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>
  • MyBatis-Spring会帮助将代码无缝整合到Spring中，它将允许Mybatis参与到Spring的事务管理之中，创建映射器mapper和SqlSession并注入到bean中
  • 优点：不需要调用session.getMapper(IpersonDao.class)
    session.commit()
    session.close()

applicationContext.xml

将SqlMapConfig.xml的数据配置到spring中

 <!-- 四大信息-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssm"></property>
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="user" value="root"></property>
        <property name="password" value=""></property>
    </bean>
    <!-- session工厂-->
    <bean id="sqlSessionFactory"  class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- com.wxx.domain.Person  person-->
        <property name="typeAliasesPackage" value="com.wxx.domain"/>
    </bean>
    <!-- IPersonDao.xml  IPersonDao.java-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.wxx.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

TestDateSource

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

public class TestDateSource {
    
    
    private static final Logger log = Logger.getLogger(TestDateSource.class.getName());
    @Qualifier("IPersonDao")
    @Autowired
    IPersonDao dao;
    @Test
    public void test01() throws SQLException {
    
    
        List<Person> date = dao.findAll();
        System.out.println(date);
    }
    @Test
    public void test02() throws SQLException{
    
    
        Person p =new Person("Cindy",200.00);
        dao.save(p);
    }
}

Spring管理事务

applicationContext.xml

进行事务管理配置

<!--配置Spring框架声明式事务管理-->
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>

    <!--配置AOP增强-->
    <aop:config>
        <aop:pointcut id="service" expression="execution(* com.wxx.service.impl.*ServiceImpl.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="service"/>
    </aop:config>

进行方法测试 编写一个新的方法

IPersonService

//保存全部数据
    void save(List<Person> persons);

PersonServiceImpl

 @Override
    public void save(List<Person> persons) {
    
    
        for(int i = 0;i <persons.size();i++){
    
    
            if(i==2){
    
    
                //System.out.println(1/0);
            }
            ipersonDao.save(persons.get(i));
        }
    }

TestPersonService

 @Test
    public void test03(){
    
    
        List<Person> personList = new ArrayList<>();
        personList.add(new Person("jack",100.00));
        personList.add(new Person("rose",200.00));
        personList.add(new Person("tom",300.00));
        personService.save(personList);
    }

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