SSM整合

一、spring整合springmvc、mybatis

二、配置文件+注解

1、创建相应的类：dao,controller,domain,service,service.impl

2、首先配置spring，使用注解方式

编写applicationContext.xml文件

<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">

<!--    开启注解的扫描,只处理service和dao，controller不需要spring框架处理，排除掉controller包不扫描-->
    <context:component-scan base-package="cn.rzpt">
<!--        配置哪些注解不扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

</beans>

@Service("accountServiceImpl")
public class AccountServiceImpl implements AccountService

测试

3、配置springMVC环境

在web.xml配置全端控制器

<web-app>
  <display-name>Archetype Created Web Application</display-name>
<!--  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>

<!--  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>
</web-app>

配置springmvc.xml

<?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="cn.rzpt">
<!--        开启扫描哪个类-->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
<!--    配置视图解析器对象-->
    <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 mapping="/css/**" location="/css/"/>
    <mvc:resources mapping="/images/**" location="/images/"/>
    <mvc:resources mapping="/js/**" location="/js/"/>
<!--    开启springmvc注解的支持-->
    <mvc:annotation-driven />
</beans>

测试：编辑jsp文件

<a href="account/findAll">测试</a>

编辑controller类

@Controller
@RequestMapping("/account")
public class AccountController {
    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("表现层：查询所有账户信息.....");
        return "list";
    }
}

编辑list.jsp

<h3>查询所有账户信息</h3>

4、spring整合springmvc

思路：在controller中能够调用service方法，则表示整合成功

在controller中依赖注入service对象就可以

那么什么时候构建service对象？

因为tomcat服务器启动，加载web.xml文件，并没有加载applicationConfig.xml

需要在web.xml中配置一个监听器类，用来监听ServletContext的创建和销毁，并提供WEB版本工厂，存储在ServletContext对象中

这个监听器有spring-web提供org.springframework.web.context.ContextLoaderListener

<web-app>
  <display-name>Archetype Created Web Application</display-name>
<!--  配置spring的监听器.默认只加载WEB-INF目录下的applicationContext.xml文件
可以设置配置文件的路径
-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
<!--  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>
  

controller类中：

@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("表现层：查询所有账户信息.....");

        //调用service方法，成功调用整合
        accountService.findAll();

        return "list";
    }
}

5、mybatis配置（采用注解方式）

核心配置文件SqlMapConfig.xml需要配置

与dao匹配的xml不需要写了

<?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>
<!--    配置环境-->
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///ssm"/>
                <property name="username" value="root"/>
                <property name="password" value="zxn682899"/>
            </dataSource>
        </environment>
    </environments>
    
<!--    引入映射配置文件-->
    <mappers>
<!--        resource是使用配置文件的方式，使用注解的话不能使用resource-->
<!--        <mapper resource="cn/rzpt/dao/AccountDao.xml"></mapper>-->
<!--        <mapper class="cn.rzpt.dao.AccountDao"/>-->
<!--        使用package，包内的所有类都可以访问到-->
        <package name="cn.rzpt.dao"/>
    </mappers>
</configuration>

dao注解：

@Repository
public interface AccountDao {

    //查询所有账户
    @Select("select * from account")
    public List<Account> findAll();

    //保存账户信息
    @Insert("insert into account (name,money) values(#{name},#{money})")
    public void saveAccount(Account account);
}

测试类：

@Test
public void run1() throws IOException {
    //加载配置文件
    InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
    //创建SQLSessionFactory对象
    SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
    //创建SqlSession对象
    SqlSession session = factory.openSession();
    //获取到代理对象
    AccountDao dao = session.getMapper(AccountDao.class);
    //查询所有数据
    List<Account> list = dao.findAll();
    for(Account account : list){
        System.out.println(account);
    }
    //关闭资源
    session.close();
    in.close();
}

6、spring整合mybatis

思路：如何把代理对象存到spring容器中

//获取到代理对象 AccountDao dao = session.getMapper(AccountDao.class);

在applicationConfig.xml中配置mybatis整合

<!--spring整合mybatis框架-->
<!--    1：配置连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql:///ssm"/>
        <property name="user" value="root"/>
        <property name="password" value="zxn68289"/>
    </bean>
<!--    2：配置SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>
<!--    3：配置AccountDao接口所在包-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.rzpt.dao"/>
    </bean>

service中：

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

    @Autowired
    private AccountDao accountDao;
    @Override
    public List<Account> findAll() {
        System.out.println("业务层查询所有账户信息。。。。。。。。");
        return accountDao.findAll();
    }

    @Override
    public void saveAccount(Account account) {

        System.out.println("业务层保存账户信息。。。。。。。。。。。");
        accountDao.saveAccount(account);
    }
}

controller中

@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    @RequestMapping("/findAll")
    public String findAll(Model model){
        System.out.println("表现层：查询所有账户信息.....");

        //调用service方法，成功调用整合
        List<Account> list = accountService.findAll();
        model.addAttribute("list",list);

        return "list";
    }
}

list.jsp中

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h3>查询所有账户信息</h3>
<c:forEach items="${list}" var="account">
    ${account.name}<br>
    ${account.money}<br>
</c:forEach>

注意&符合改成：&amp；

?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8

7、spring整合mybatis事务框架

保存数据需要事务开启

配置事务在apllication中，加入：

<!--    配置spring框架声明式事务管理-->
<!--    1：配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
<!--    2：配置事务通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>
<!--    3：配置AOP增强-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.rzpt.service.impl.*ServiceImpl.*(..))"/>
    </aop:config>  

index.jsp：

<h3>测试保存</h3>
<form action="account/save" method="post">
    姓名：<input type="text" name="name"/><br/>
    金额：<input type="text" name="money"/><br/>
    <input type="submit" value="保存">
</form>  

AccountController中：  

@RequestMapping("/save")
public String save(Account account){  

//注意account的自动封装，从jsp来的数据  

    System.out.println("表现层：保存账户信息.....");

    //调用service方法，成功调用整合
    accountService.saveAccount(account);

    return "list";
}  

也可以：