SSM框架整合

1.明确目的

• 主次分明，spring整合其他框架
• spring，springmvc，mybatis

2.springMVC配置

<!-- 开启扫描，扫描controller包中的@Controller注解，注入spring容器中 -->
<context:component-scan base-package="com.spring.demo.controller"/>

<!--自动配置处理映射器和适配器，支持注解@RequestBody功能强大，配置后可以省略RequestMappingHandlerMapping，RequestMappingHandlerAdapter-->
<mvc:annotation-driven/>
<!--相当于配置以下两个bean-->
<!--处理器映射器-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
<!--处理器适配器-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

<!--配置视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <!--前缀-->
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <!--后缀-->
    <property name="suffix" value=".jsp"/>
</bean>
<!--<mvc:view-resolvers>
        <mvc:jsp prefix="/WEB-INF/jsp/" suffix=".jsp"></mvc:jsp>
    </mvc:view-resolvers>-->


<!--开启aop注解，因为字父容器所以要在springmvc中配置，否则无法在controller包中使用切面-->
<aop:aspectj-autoproxy />

<!--释放静态资源-->
<!--<mvc:resources mapping="/static/**" location="/static/"/>-->
<mvc:default-servlet-handler />


<!--文件上传，解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <!--设置文件上传大小，字节为单位-->
    <property name="maxUploadSize" value="" />
</bean>

​ 在web.xml中配置springMVC

<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:spring-mvc.xml</param-value>
  </init-param>
</servlet>
<servlet-mapping>
  <servlet-name>springMVC</servlet-name>
  <!--如果拦截 /* 会导致返回的页面是代码-->
  <url-pattern>/</url-pattern>
</servlet-mapping>

3.mvc全局异常处理（实现接口：HandlerExceptionResolver）

//全局异常处理类
public class demo implements HandlerExceptionResolver {
    /**
     *
     * @param httpServletRequest 当前请求对象
     * @param httpServletResponse 当前响应对象
     * @param o     请求访问控制器中方法的对象
     * @param e     错误异常
     * @return
     */
    @Override
    public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
        return null;
    }
}

<!--mvc配置文件中注入，当程序出现异常未处理时自动调用处理定义好的异常处理方法-->
<bean class="com.spring.demo.interceptor.MyHandlerExceptionResolver"/>

4.拦截器（实现接口：HandlerInterceptor）

<!--拦截器-->
<mvc:interceptors>
    <mvc:interceptor>
        <mvc:mapping path="/*"/>
        <!--注入拦截器-->
        <bean class="com.mds.interceptor.MvcHandler" />
    </mvc:interceptor>
</mvc:interceptors>

public class MyhandlerIntercephtor implements HandlerInterceptor {
	//拦截之前
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        return false;   //放行 return true
    }
	//放行后
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }
	//响应完毕
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

5.过滤器（实现接口：Filter）

5.1 拦截所有web请求，拦截器只拦截项目中的请求

public class LoginFilter implements Filter {
    ArrayList<String> noFilter = new ArrayList<>();

    /**
     * 在tomcat启动时执行
     * @param filterConfig
     * @throws ServletException
     */
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("LoginFilter.init ------->过滤器初始化");
        noFilter.add("/test");
        noFilter.add("/error");

    }

    /**
     * 项目启动后执行
     * @param servletRequest    servlet请求的对象
     * @param servletResponse   servlet的响应对象
     * @param filterChain
     * @throws IOException
     * @throws ServletException
     */
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        System.out.println("过滤器接收请求");
        /*System.out.println("请求的类型："+request.getAuthType());
        System.out.println("请求的项目："+request.getContextPath());
        System.out.println("以什么方式请求："+request.getMethod());
        System.out.println("请求的全路径："+request.getRequestURL());
        System.out.println("请求的接口："+request.getServletPath());*/

        String path = request.getServletPath();
        AntPathMatcher antPathMatcher = new AntPathMatcher();
        for (int i = 0; i < noFilter.size(); i++) {
            //通过AntPathMatcher对象验证，请求是否通过
            if (antPathMatcher.match(path,noFilter.get(i))){
                //放行
                filterChain.doFilter(servletRequest,servletResponse);
            }
        }
        //重定向到错误页面
        response.sendRedirect("error");

        System.out.println("过滤器请求响应");
    }
    /**
     * 服务器关闭之前执行
     */
    @Override
    public void destroy() {
        System.out.println("过滤器销毁");
    }
}

5.2 在web.xml中配置

<filter>
	<filter-name>LoginFilter</filter-name>
    <filter-class>com.spring.demo.filter.LoginFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>LoginFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

6.applicationContext中的配置

6.1 把连接mysql的配置转移到properties文件中

jdbc.url=jdbc:mysql://localhost:3306/sdb?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
jdbc.username=root
jdbc.password=123456
jdbc.driver=com.mysql.jdbc.Driver

<!--开启扫描-->
<context:component-scan base-package="com.spring.demo">
    <!--不扫描-->
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!--引入properties配置文件-->
<context:property-placeholder location="classpath:/jdbc.properties"/>

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

<!--整合mybatis-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!--给entity包下的实体取别名-->
    <property name="typeAliasesPackage" value="com.mds.entity" />
    <!--操作数据库的文件-->
    <property name="mapperLocations" value="classpath:/mapper/*Mapper.xml"/>
</bean>

<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    <property name="basePackage" value="com.mds.mapper" />
</bean>

<!--开启事务-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
</bean>

<tx:annotation-driven transaction-manager="transactionManager" />

6.2 web.xml中配置applicationContext.xml

<!--spring核心配置文件，servlet启动加载-->
<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

7.整合日志

​ 需要jar包

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>2.0.0-alpha1</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.17</version>
</dependency>

​ 在resource文件下创建log4j.properties文件

# resources # resources⽂件夹根⽬录下
### 配置根
log4j.rootLogger =debug,console

### ⽇志输出到控制台显示
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.Target=System.out
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

8.spring相关jar

<!--spring核心依赖-->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-context</artifactId>
  <version>5.2.12.RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-jdbc</artifactId>
  <version>5.3.4</version>
</dependency>
<!--spring aop核心依赖-->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-aop</artifactId>
  <version>5.2.12.RELEASE</version>
</dependency>
<dependency>
  <groupId>aspectj</groupId>
  <artifactId>aspectjrt</artifactId>
  <version>1.5.4</version>
</dependency>
<dependency>
  <groupId>org.aspectj</groupId>
  <artifactId>aspectjweaver</artifactId>
  <version>1.9.6</version>
</dependency>
<!--数据源-->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.2.4</version>
</dependency>
<!--web依赖-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.2.12.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>5.2.12.RELEASE</version>
</dependency>
<!--mybatis相关依赖-->
<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>
<!--servlet el表达式-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>
<!--json数据格式-->
<dependency>
	<groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.11.0</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.11.0</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.11.0</version>
</dependency>
<!--整合日志-->
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>2.0.0-alpha1</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

Q.E.D.