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  • JavaSSM框架整合

    SSM整合

    在博客的前面介绍了mybatis,spring,springmvc的使用,那么这篇博客将介绍将mybatis和spring,springmvc的整合。

    整合之前,我们需要明白一个点,spring和mybatis之间进行整合不像spring和springmvc一样是天然一体,所以在中间就需要一个磨合剂,那就是mybatis-spring这个依赖。

    jar包的导入

    使用maven进行项目管理

    <!--添加Servlet的依赖-->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>
    
    <!--JSTL用于在控制器中将模型绑定到JSP中-->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    
    <!--添加spring的依赖-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>
    
    <!--上下文-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <!--上下文支持包-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${spring.version}</version>
    </dependency>
    
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${spring.version}</version>
    </dependency>
    
    <!--添加Spring MVC的依赖-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</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-aspects</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${spring.version}</version>
    </dependency>
    
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    
    <!--利用它处理事务问题-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${spring.version}</version>
    </dependency>
    
    <!--添加数据库Mysql驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.13</version>
    </dependency>
    
    <!--添加Mybatis依赖-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.2.6</version>
    </dependency>
    
    <!--整合Mybatis与Spring的依赖-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.3.0</version>
    </dependency>
    <!-- Mybatis分页依赖 -->
    <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
        <version>4.1.6</version>
    </dependency>
    
    <!-- 处理时间日期格式 -->
    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
        <version>2.9.9</version>
    </dependency>
    
    <!-- 用于MD5加密 -->
    <dependency>
        <groupId>commons-codec</groupId>
        <artifactId>commons-codec</artifactId>
        <version>1.10</version>
    </dependency>
    
    <!--日志-->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.7</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.7</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
    
    <!--添加Json依赖-->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <!--有时候不加可能会报错-->
    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>
    
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    
    <!-- 新添加处理json为java bean -->
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-core-asl</artifactId>
        <version>1.9.13</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.9.13</version>
    </dependency>
    
    <!-- 数据源的引入, 池化技术 -->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.2.1</version>
    </dependency>
    <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
        <version>1.2.2</version>
    </dependency>
    
    <!--阿里巴巴json库-->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version> 1.2.47</version>
    </dependency>
    
    <!--java发送http请求的库-->
    <dependency>
        <groupId>com.github.kevinsawicki</groupId>
        <artifactId>http-request</artifactId>
        <version>5.6</version>
    </dependency>
    
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.11</version>
        <scope>test</scope>
    </dependency>
    
    

    在这里面导入的jar包有点多,不过可以基本满足我们的需求了。

    文件的配置

    首先,我们要明确文件的配置从哪里开始,那么肯定是需要最先配置web.xml了,因为它管理着web项目的配置信息。

    • web.xml

      <?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"
              xmlns:mvc="http://www.springframework.org/schema/mvc"
              xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                  http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd
                  http://www.springframework.org/schema/mvc/spring-mvc.xsd"
              version="3.1">
      
          <!--配置ContextLoaderListener,初始化IOC容器
              作用就是启动Web容器时,自动装配ApplicationContext的配置信息
              经常配合下面<context-param>使用
          -->
          <listener>
              <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
          </listener>
      
          <!-- 上下文 -->
          <context-param>
              <param-name>contextConfigLocation</param-name>
              <!--classpath其实就相当于resources文件夹-->
              <param-value>classpath:spring/applicationContext.xml</param-value>
          </context-param>
      
          <!-- 防止Spring内存溢出监听器 -->
          <listener>
              <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
          </listener>
      
          <!--servlet分发-->
          <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/springmvc-servlet.xml</param-value>
              </init-param>
          </servlet>
      
          <!-- characterEncodingFilter字符编码过滤器 -->
          <filter>
              <filter-name>characterEncodingFilter</filter-name>
              <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
              <init-param>
                  <!-- 需要使用的字符集 -->
                  <param-name>encoding</param-name>
                  <param-value>UTF-8</param-value>
              </init-param>
              <init-param>
                  <!--是否强制设置request的编码为encoding,即UTF-8,默认为false -->
                  <param-name>forceRequestEncoding</param-name>
                  <param-value>false</param-value>
              </init-param>
              <init-param>
                  <!--是否强制设置response的编码为encoding,即UTF-8 -->
                  <param-name>forceResponseEncoding</param-name>
                  <param-value>true</param-value>
              </init-param>
          </filter>
      
          <filter-mapping>
              <filter-name>characterEncodingFilter</filter-name>
              <!-- 这里必须写 /* -->
              <url-pattern>/*</url-pattern>
          </filter-mapping>
      
          <servlet-mapping>
              <servlet-name>springmvc</servlet-name>
              <url-pattern>/</url-pattern>
          </servlet-mapping>
      
      </web-app>
      
    • applicationContext.xml文件的配置

      在web.xml文件配置中,我们关于上下文文件的引入就只写了一个applicationContext.xml,那么其他文件怎么办呢?我们可以在applicationContext.xml文件中引入其他的文件。

      <?xml version="1.0" encoding="UTF-8"?>
      <beans xmlns="http://www.springframework.org/schema/beans"
          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">
      
          <!--引入spring和其他整合的配置文件 比如spring-mybatis.xml等-->
          <import resource="classpath:/spring/spring-*.xml"/>
      </beans>
      
    • 配置springmvc-servlet.xml文件

      <?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:aop="http://www.springframework.org/schema/aop"
          xmlns:context="http://www.springframework.org/schema/context"
          xmlns:mvc="http://www.springframework.org/schema/mvc"
          xsi:schemaLocation="http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
          http://www.springframework.org/schema/aop
          http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
          http://www.springframework.org/schema/context
          http://www.springframework.org/schema/context/spring-context.xsd
          http://www.springframework.org/schema/mvc
          http://www.springframework.org/schema/mvc/spring-mvc.xsd">
      
          <!--扫描controller的注解
              填写自己的控制器的包
          -->
          <context:component-scan base-package="cc.weno.controller"/>
          <!--静态资源放行问题-->
          <mvc:default-servlet-handler/>
          <!--配置代理-->
          <mvc:annotation-driven/>
      
          <!--配置拦截器-->
          <mvc:interceptors>
              <!--配置一个拦截器
                  可以配置多个,那么拦截顺序则是从上到下
              -->
              <mvc:interceptor>
                  <!--拦截的URI
                      /* 代表拦截这一层的任意字符
                      /** 代表拦截任意层次的任意字符
                  -->
                  <mvc:mapping path="/**"/>
                  <!--不进行拦截的uri-->
                  <mvc:exclude-mapping path="/index"/>
                  <mvc:exclude-mapping path="/login"/>
                  <!-- 拦截器的包 -->
                  <bean class="cc.weno.interceptor.LoginInterceptor"/>
              </mvc:interceptor>
          </mvc:interceptors>
      
          <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
              id="internalResourceViewResolver">
              <property name="prefix" value="/jsp/"/>
              <property name="suffix" value=".jsp"/>
          </bean>
      
      </beans>
      
    • 在配置mybatis文件之前,我们需要配置一下jdbc.properties

      mysql.driver=com.mysql.jdbc.Driver
      mysql.url=数据库地址 例如:jdbc:mysql://localhost:3306/test
      mysql.username=账号
      mysql.password=密码
      
      #定义初始连接数
      dbcp.initialSize=0
      #定义最大连接数
      dbcp.maxActive=20
      #定义最大空闲
      dbcp.maxIdle=20
      #定义最小空闲
      dbcp.minIdle=1
      #定义最长等待时间
      dbcp.maxWait=60000
      
    • spring-mybatis.xml文件的配置

      <?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:p="http://www.springframework.org/schema/p"
          xmlns:context="http://www.springframework.org/schema/context"
          xmlns:mvc="http://www.springframework.org/schema/mvc"
          xmlns:tx="http://www.springframework.org/schema/cache"
          xsi:schemaLocation="http://www.springframework.org/schema/beans
                              http://www.springframework.org/schema/beans/spring-beans.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
                              http://www.springframework.org/schema/mvc
                              http://www.springframework.org/schema/mvc/spring-mvc.xsd
                              http://www.springframework.org/schema/cache
                              http://www.springframework.org/schema/cache/spring-cache.xsd
                              http://www.springframework.org/schema/context
                              http://www.springframework.org/schema/context/spring-context.xsd">
      
          <!--自动扫描包,包括控制层和持久层 -->
          <context:component-scan base-package="cc.weno"/>
      
          <!--引入数据库配置文件-->
          <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
              <!-- value 填写jdbc.properties文件的位置 -->
              <property name="location" value="classpath:/config/jdbc.properties"/>
          </bean>
      
          <!--配置连接池-->
          <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
              destroy-method="close"
          >
              <property name="driverClassName" value="${mysql.driver}"/>
              <property name="url" value="${mysql.url}"/>
              <property name="username" value="${mysql.username}"/>
              <property name="password" value="${mysql.password}"/>
              <!--定义数据库的连接-->
              <property name="initialSize" value="${dbcp.initialSize}"/>
              <property name="maxIdle" value="${dbcp.maxIdle}"/>
              <property name="minIdle" value="${dbcp.minIdle}"/>
              <property name="maxWait" value="${dbcp.maxWait}"/>
              <property name="maxActive" value="${dbcp.maxActive}"/>
          </bean>
      
          <!--整合spring和mybatis,就不需要像以前一样写mybati的配置文件了-->
          <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
              <property name="dataSource" ref="dataSource"/>
              <!-- 自动扫描mapping.xml文件 注意路径是"/"不是"."-->
              <property name="mapperLocations" value="classpath:mybatis/*.xml"/>
              <property name="configuration">
                  <!--可以将之前mybatis的一些配置项转移到这里来-->
                  <bean class="org.apache.ibatis.session.Configuration">
                      <property name="mapUnderscoreToCamelCase" value="true"/>
                  </bean>
              </property>
          </bean>
      
          <!-- 扫描DAO持久层接口 -->
          <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
              <property name="basePackage" value="cc.weno.mapper"/>
              <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
          </bean>
      
          <!--数据库事务管理-->
          <bean id="transactionManager"
              class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
              <property name="dataSource" ref="dataSource"/>
          </bean>
      </beans>
      

    项目结构如图所示


     
    作用设计
    持久层(DAO层) DAO层负责与数据库联系,进行数据持久化 首先设计接口,然后再配置×××mapper.xml文件
    业务层(Service层) 负责业务模块的逻辑应用设计 先设计接口,再设计实现类,然后调用接口来实现逻辑业务(spring-mybatis.xml文件配置后,直接调用)
    Control层(控制层) 负责具体模块的控制 调用Service层的接口来控制业务

    DAO层和前面的博客配置没有什么区别,让我们主要来看看Service层的配置。

    首先,先定义UserService的接口

    
    public interface UserService {
        User getUser(String name);
    }
    

    然后进行Service接口的实现,使用@Service标注Service层

    @Service("userService")
    public
    class UserServiceImpl implements UserService { /** * mybatis的接口 */ @Resource private UserMapper userMapper; // 直接进行使用 @Override public User getUser(String name) { userMapper.getUser(name); } }

    在Controller层中

    
    @Controller
    public class UserController {
    
        @Resource
        private UserService userService;
    
        @RequestMapping(value = "/index")
        @ResponseBody
        public String index(@RequestParam("name")String name) {
            User u  =userService.getUser(name);
            return u;
        }
    }
    

    UserMapper.xml文件倒是没有任何要更改的地方,只要别忘了配置<mapper namespace="cc.weno.mapper.UserMapper">文件就行了。

    然后SSM框架基本的整合就到这里了,在这里面代码没几行,配置文件倒是写了一大堆〒_〒【此时好想说:springboot真香】


     
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  • 原文地址:https://www.cnblogs.com/xiaohuiduan/p/10023096.html
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