一、Spring整合javaWeb
配置文件中配置出一个监听器充当Spring容器：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
Servlet不能用注解注入，因为Servlet对象创建是交给Tomcat的，和IOC容器中的对象不是同个概念，因此不能直接用Controller注解注入。故成员变量Service也不能自动装配，只能用容器.getBean(class)方法获得。
WebApplicationContext ioc = ContextLoader.getCurrentWebApplicationContext(); //在Web应用程序启动时载入Ioc容器
Object object = ioc.getBean(class);
二、SpringMVC整合Spring
Spring是父容器，SpringMVC是子容器。
两个容器各司其职，SpringMVC的容器就负责创建标注Controller和ControllerAdvice的组件。Spring容器负责创建其他的组件。
web.xml配置：
<!-- 配置Spring容器-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<!-- 默认将dispatcher-servlet.xml作为SpringMVC的配置文件-->
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Spring容器配置文件(事务控制、数据源等等)：
<!-- 不配置Controller和ControllerAdvice-->
<context:component-scan base-package="com.cj">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
<context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
</context:component-scan>
<!-- 配置数据源-->
<context:property-placeholder location="classpath:dbcp.properties"></context:property-placeholder>
<bean class="org.apache.commons.dbcp.BasicDataSource" id="dataSource">
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="driverClassName" value="${jdbc.driverClassName}"></property>
<!-- <property name="minIdle" value="5"></property>-->
<!-- <property name="maxIdle" value="20"></property>-->
</bean>
SpringMVC容器配置文件(视图解析器、数据校验、文件上传等等)：
<context:component-scan base-package="com.cj" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
</context:component-scan>
三、MyBatis整合Spring、SpringMVC
导入mybatis-spring-2.0.3.jar包。
Spring配置文件中配置数据源，交给Mybatis，之前已经将除了带有Controller和ControllerAdvice注解的组件加到容器中了。Spring可以方便地指定映射配置文件的位置。将接口的实现类加入到容器中后，就可以用注解自动装配了。
<!-- 配置数据源-->
<context:property-placeholder location="classpath:dbcp.properties"></context:property-placeholder>
<bean class="org.apache.commons.dbcp.BasicDataSource" id="dataSource">
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="driverClassName" value="${jdbc.driverClassName}"></property>
<!-- <property name="minIdle" value="5"></property>-->
<!-- <property name="maxIdle" value="20"></property>-->
</bean>
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
<property name="dataSource" ref="dataSource"></property>
<!-- 指定mapper配置文件-->
<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property>
</bean>
<!-- 把dao包下所有接口的实现类加入到IOC容器-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.cj.dao"></property>
</bean>
Spring5.0已经不支持Log4j了，需要改用Log4j2，这个是前面的升级版。
测试SSM代码
新建log4j2.xml(名字必须是这个)：
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<!-- Author: Crunchify.com -->
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p %c{1}:%L - %msg%n" />
</Console>
<!-- 注意%i和 %d{yyyyMMdd}，这样子才能将文件删除-->
<RollingFile name="RollingFile" filename="/log/Convergence.log"
filepattern="/log/%d{yyyyMMdd}-Convergence-%i.log">
<PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p %c{1}:%L - %msg%n" />
<Policies>
<SizeBasedTriggeringPolicy size="20 MB" />
</Policies>
<DefaultRolloverStrategy max="20" >
<Delete basePath="/log/" maxDepth="1">
<IfFileName glob="*-Convergence-*.log" />
<IfLastModified age="30D" />
</Delete>
</DefaultRolloverStrategy>
</RollingFile>
</Appenders>
<Loggers>
<!-- name中的值为mybatis的DAO层接口包路径 -->
<logger name="convergence.idao" level="DEBUG" additivity="false">
<appender-ref ref="Console"/>
</logger>
<Root level="DEBUG">
<AppenderRef ref="Console" />
<AppenderRef ref="RollingFile" />
</Root>
</Loggers>
</Configuration>
javaBean：
public class Person implements Serializable {
private static final long serialVersionUID = 7758287963968328945L;
private Integer PERSON_ID;
private String PERSON_NAME;
private Integer PERSON_GENDER;
private Integer PERSON_AGE;
...
}
Dao接口：
public interface PersonDao {
public Person QueryById(Integer id);
}
映射配置文件：
<?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.cj.dao.PersonDao">
<cache/>
<select id="QueryById" resultType="com.cj.entity.Person">
select * from person where PERSON_ID=#{id}
</select>
</mapper>
testSSM.jsp：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>SSM</title>
</head>
<body>
<a href="justQuery?id=2">测试SSM整合</a>
</body>
</html>
控制器：
@Controller
public class PersonController {
@Autowired
private PersonService personService;
@RequestMapping("/justQuery")
public String Query(@RequestParam("id")Integer id, Model model) {
Person p=personService.QueryById(id);
model.addAttribute("person",p);
return "success";
}
}
success.jsp：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Successful</title>
</head>
<body>
${person}
</body>
</html>
SSM整合效果测试：
a href=“https://pan.baidu.com/s/17LfkbRLB3s4ufeKh0eeb-g”>需要用到的jar包
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