SSM整合——控制层的整合

Springmvc.xml,处理器映射器、处理器适配器(可以mvc注解驱动规则这两个处理器映射器、处理器适配器)，视图解析器。

<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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd 
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.1.xsd 
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.1.xsd 
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd ">
    <!-- 组件扫描 只扫描action -->
    <context:component-scan base-package="com.my.ssm.action" />
    <!-- 使用<mvc:annotation-driven />替换上边定义的处理器映射器和适配器 -->
    <mvc:annotation-driven />
    <!-- 视图解析器 解析jsp视图，默认使用jstl，要求classpath下有jstl的jar包 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 视图的前缀-->
        <property name="prefix" value="/jsp/" /> 
        <!-- 视图的后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

配置前端控制器：在web.xml配置：

<!-- 加载spring容器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext-*.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- post乱码处理 -->
    <filter>
        <filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 前端控制器 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- contextConfigLocation指定 springmvc的全局配置文件 如果 contextConfigLocation不指定，默认找配置文件名称：servlet的name+"-servlet.xml" -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/springmvc.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
</web-app>

编写action:

@Controller
@RequestMapping("/user")
public class UserAction {
    //查询用户信息
    //注入userService
    @Autowired
    private UserService userService;
    //查询用户信息
    @RequestMapping("/queryUser")
    public String queryUser(Model model,Integer id) throws Exception{
        //调用service
        System.out.println("========");
        User user = userService.findUserById(id);
        model.addAttribute("user", user);
        //返回逻辑视图名
        return "/jsp/queryUser";
    }
}