• Java SSM框架的简单搭建


    1.添加依赖包,可以通过properties统一框架版本
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
        <springversion>5.0.8.RELEASE</springversion>
      </properties>
    
      <dependencies>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.11</version>
          <scope>test</scope>
        </dependency>
        <!-- 加入ServletAPI -->
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
          <scope>provided</scope>
        </dependency>
        <!-- MySQL依赖 start -->
        <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.38</version>
        </dependency>
        <!-- 加入MyBatis 依赖 start -->
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.2.8</version>
        </dependency>
        <!-- 引入Spring(包含SpringMVC) 依赖 start -->
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-oxm</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aop</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>${springversion}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-test</artifactId>
          <version>${springversion}</version> </dependency>
        <!-- 引用插件依赖:MyBatis整合Spring,如果mybatis版本在3.4及以上版本 mybatis-spring的版本要在1.3以上 -->
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.2.2</version>
        </dependency>
        <!-- JSTL -->
        <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
        </dependency>
        <!-- 德鲁伊数据连接池 -->
        <dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>druid</artifactId>
          <version>1.0.9</version>
        </dependency>
        <!-- pagehelper -->
        <dependency>
          <groupId>com.github.pagehelper</groupId>
          <artifactId>pagehelper</artifactId>
          <version>4.1.6</version>
        </dependency>
        <!--处理json-->
        <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-databind</artifactId>
          <version>2.9.5</version>
        </dependency>
        <!--javaee-->
        <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> <scope>provided</scope> </dependency>
        <!--文件上传下载-->
        <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency>
        <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency>
      </dependencies>
    2.添加spring配置文件,ssm中可以省略mybatis.xml文件 
    3.配置web.xml文件,同时加载spring配置文件
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns="http://java.sun.com/xml/ns/javaee"
             xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
             http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
      <display-name>Archetype Created Web Application</display-name>
    
      <!--1.配置前端控制器-->
      <servlet>
        <servlet-name>aa</servlet-name>
        <servlet-class>
          org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:spring.xml</param-value>
        </init-param>
      </servlet>
      <servlet-mapping>
        <servlet-name>aa</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
    
      <!--2.处理post乱码-->
      <filter>
        <filter-name>bb</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>bb</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
    </web-app>
     
    4.创建数据表,添加项目包结构,包括实体类等
    给dao,service,web包下使用注解创建对象,给service,web中的属性注入对象 
     
    5.配置spring.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:context="http://www.springframework.org/schema/context"
           xmlns:mvc="http://www.springframework.org/schema/mvc"
           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/mvc
                               http://www.springframework.org/schema/mvc/spring-mvc.xsd
                               http://www.springframework.org/schema/tx
                               http://www.springframework.org/schema/tx/spring-tx.xsd">
    
        <!--1.配置数据源-->
        <bean id="db" class="com.alibaba.druid.pool.DruidDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
            <property name="url" value="jdbc:mysql://localhost:3306/hunan"></property>
            <property name="username" value="root"></property>
            <property name="password" value=""></property>
        </bean>
        <!--2.创建sqlSessionFactory-->
        <bean id="fac" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="db"></property>
            <property name="configLocation" value="classpath:mybatis.xml"></property> <!--指定mybatis的配置文件路径-->
            <property name="mapperLocations" value="classpath:mapper/*.xml"></property><!--指定mybatis的mapper文件路径-->
        </bean>
        <!--3.创建sqlSessionFactory-->
        <bean class="org.mybatis.spring.SqlSessionTemplate">
            <constructor-arg index="0" ref="fac"></constructor-arg>
        </bean>
        <!--4.配置事务-->
        <bean id="mytx" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="db"></property>
        </bean>
        <tx:annotation-driven transaction-manager="mytx"></tx:annotation-driven>
        <!--5.启用springmvc注解-->
        <mvc:annotation-driven></mvc:annotation-driven>
        <!--6.配置视图解析器-->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/"/>
            <property name="suffix" value=".jsp"></property>
        </bean>
        <!--7.扫描注解包-->
        <context:component-scan base-package="com.java"></context:component-scan>
        <!--8.配置静态资源访问-->
        <mvc:default-servlet-handler></mvc:default-servlet-handler>
    6.配置controller文件
    使用的注解:@Controller,@RequestMapping,@AutoWired,@Qualififier("empBiz")
     
    7.添加service,dao层
    使用的注解:@Service ,@AutoWired
    (1) dao层省略了实现类
    (2) dao 层只定义接口,由小树叶创建dao层对象以及扫描mapper文件
    注:当添加了spring-jdbc的jar包后,会自动提交事务
     
    补充:
    分页插件: 
    <plugins> 
        <!-- PageHelper4.1.6 --> 
      <plugin interceptor="com.github.pagehelper.PageHelper">         
      <property name="dialect" value="mysql"/> </plugin> </plugins>
    (1) 省略dao层实现类(使用MapperScannerConfifigurer替代SqlSessionTemplate): 
    <!--省略实现类--> 
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">     
      <property name="basePackage" value="com.dao"></property>
      <property name="sqlSessionFactoryBeanName" value="fac"></property> </bean>
    注意:此时也可以测试使用属性文件的方式来加载数据源(支持属性文件链接数据源)
    (2) maven类型的web项目加载mybatis-generator插件
    注意:反向生成后,最好把该指令删除,否则不小心点了之后,又会生成一遍代码,尤其是mapper.xml文件中sql语
    句又会生成一遍,运行时会报错。
     
    总结:大体流程是,网页请求->调用web.xml配置文件(springMVC框架,解决网页请求对应类调用),(前端->controller)
                ->调用spring.xml配置文件(解决调度类中对象的注入IOC),对应servlet->service层
                ->调用mybatis配置文件,对应dao(bean)->数据库
                ->逐层返回
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  • 原文地址:https://www.cnblogs.com/misaki-workshop/p/13894522.html
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