maven

核心依赖包

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>5.1.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>5.1.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.1.9.RELEASE</version>
    </dependency>
</dependencies>

Web依赖包

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.1.9.RELEASE</version>
</dependency>

配置文件

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <filter>
        <filter-name>encoding</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>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <context-param>
        <param-name>log4jConfiguration</param-name>
        <param-value>classpath:log4j.properties</param-value>
    </context-param>
  <display-name>Archetype Created Web Application</display-name>
    <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>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

dispatcher-servlet.xml

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvn="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/mvc
       https://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 设置Controller所在包 -->
    <context:component-scan base-package="org.yiva.demo.springmvc.controller">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!-- 添加依赖注入 -->
    <context:annotation-config />

    <!-- 注册HandlerMapper、HandlerAdapter两个映射类 -->
    <mvc:annotation-driven />

    <!-- 访问静态资源 <mvc:default-servlet-handler />同样用于处理表态资源-->
    <!-- 静态资源放在"/resources"目录下 -->
    <mvn:resources mapping="/resources/**" location="/resources/"/>

    <!--<mvc:default-servlet-handler />-->

    <!-- 视图解析器 -->
    <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    
    <!--FreeMarker-->
    <bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
        <property name="templateLoaderPath" value="/views/"/>
    </bean>
    <bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
        <property name="contentType" value="text/html;charset=utf-8"/>
        <property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView"/>
        <property name="prefix" value=""/>
        <property name="suffix" value=".ftl"/>
        <property name="exposeRequestAttributes" value="true"/>
        <property name="exposeSessionAttributes" value="true"/>
        <property name="exposeSpringMacroHelpers" value="true"/>
        <property name="requestContextAttribute" value="request"/>
        <property name="exposeContextBeansAsAttributes" value="true"/>
    </bean>
</beans>

applicationContext.xml

配置除Controller以外需进行依赖注入的类

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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">

    <context:component-scan base-package="org.yiva.exam">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <context:annotation-config/>

<!--数据库连接-->
    <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
        <property name="jdbcUrl"
                  value="jdbc:mysql://localhost:3306/db_zxbj?useUnicode=true&amp;characterEncoding=utf8&amp;useSSL=false"/>
        <property name="user" value="root"/>
        <property name="password" value="12345678"/>
    </bean>
<!--Mybatis-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:org/yiva/exam/dao/mappers/*.xml"/>
        <property name="configuration">
            <bean class="org.apache.ibatis.session.Configuration">
            <!--驼峰命名方式-->
                <property name="mapUnderscoreToCamelCase" value="true"/>
            </bean>
        </property>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="org.yiva.exam.dao"/>
    </bean>

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

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

Controller

请求

@Controller
@RequestMapping(value = "/") //拦截根目录
public class IndexController {

    @RequestMapping(value = "")
    public String index(){
        return "index"; //返回到index页面
    }
}

• 带参
  • 普通方式

  // url=/view?name=123
  @RequestMapping(value = "/view",method = RequestMethod.GET)
  public String index(@RequestParam(value = "name") String name){
      return "index";
  }
  

  • Restful方式

  // url=/view/2
  @RequestMapping(value = "/view/{name}",method = RequestMethod.GET)
  public String index(@PathVariable(value = "name") String name){
      return "index";
  }
  

  • servlet方式

  // url=/view?name=123
  @RequestMapping(value = "",method = RequestMethod.GET)
  public String index(HttpServletRequest request){
      int id = Integer.valueOf(request.getParameter("name"));
      return "index";
  }
  

重定向

@Controller
@RequestMapping(value = "/")
public class IndexController {

    @RequestMapping(value = "",method = RequestMethod.GET)
    public String index(){
        return "index";
    }

    @PostMapping(value = "subDoSth")
    public String doSth(){
    //重定向到指定位置，跳转使用forward
        return "redirect:/";
    }

}

参数访问

• PathVariable方式

/url/demo/param/p/123

@GetMapping(value = "demo/param/p/{message}")
public String demoMsg(@PathVariable String message){
    return "hello "+message;
}

• RequestParam

/url/demo/param?p=123

@GetMapping(value = "demo/param")
public String demoMsg(@RequestParam(value = "p") String message){
    return "hello "+message;
}