• SpringMVC+MyBatis(最新)


    目前主流的Web MVC框架,除了Struts这个主力 外,还有Spring MVC,主要是由于Spring MVC配置比较简单,使用起来也十分明了,非常灵活,与Spring 集成较好,对RESTful API的支持也比struts要好。
    MyBatis是ibatis的升级版,作为hibernate的老对手,它 是一个可以自定义SQL、存储过程和高级映射的持久层框架。
    与hibernate的主要区别就是mybatis是半自动化的,而hibernate是全自动的,所以当应用需求越来越复杂的时候,自动化的sql显得比较笨拙。
    由于前段时间接了个项目要用springmvc做,所以我抱着练手的态度,又玩起了整合框架的游戏。经常搭框架的人应该都清楚,框架搭建的核心就是配置文件。所以我主要贴下几个配置文件的代码。还是那句话,我都是写好配置文件之后,运行报错再加jar。这里列一下我用的jar包(应该是最少的):

    备注:上图有一些额外的jar,比如我用的数据库连接池是阿里巴巴的druid、日志框架式logback,所以引入了相关jar。关于这两个框架的使用和配置都是非常简单的,所以这里就不细说。
    1.整合SpringMVC
    springMybatis-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: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.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">  
          
            <!-- 启用spring mvc 注解-->  
        <mvc:annotation-driven>   
        </mvc:annotation-driven>  
          
        <!-- 自动扫描的包名 ,使Spring支持自动检测组件,如注解的Controller-->  
        <context:component-scan base-package="com.alibaba.controller" />  
        <context:component-scan base-package="com.alibaba.service"/>  
          
          
        <!-- 视图解析器:定义跳转的文件的前后缀 -->    
        <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">    
            <property name="prefix" value="/WEB-INF/jsp/" />    
            <property name="suffix" value=".jsp" />  <!--可为空,方便实现自已的依据扩展名来选择视图解释类的逻辑  -->  
        </bean>    
      
        <!--配置拦截器, 多个拦截器,顺序执行 -->   
        <mvc:interceptors>    
            <mvc:interceptor>    
                <!-- 匹配的是url路径  -->  
                <mvc:mapping path="/" />  
                <mvc:mapping path="/user/**" />  
                <mvc:mapping path="/test/**" />  
                  
                <bean class="com.alibaba.interceptor.CommonInterceptor"></bean>    
            </mvc:interceptor>  
            <!-- 当设置多个拦截器时,先按顺序调用preHandle方法,然后逆序调用每个拦截器的postHandle和afterCompletion方法 -->  
        </mvc:interceptors>  
            
    </beans>     

    2.整合Mybatis

    spring-dao.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:mybatis="http://mybatis.org/schema/mybatis-spring"  
           xmlns:context="http://www.springframework.org/schema/context"  
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd  
           http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd  
           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">  
          
        <!-- 该包下的类支持注解,表示会被当作{@code mybatis mapper}处理 配置了之后表示可以自动引入mapper类-->  
        <mybatis:scan base-package="com.alibaba.dao"/>  
        <!--引入属性文件 -->  
        <context:property-placeholder location="classpath:configuration.properties"/>  
          
        <!--数据库连接-->  
        <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">   
            <property name="url" value="${jdbc.url}" />  
            <property name="username" value="${jdbc.username}"/>  
            <property name="password" value="${jdbc.password}"/>  
            <!-- 配置初始化大小、最小、最大 -->  
            <property name="initialSize"><value>1</value></property>  
            <property name="maxActive"><value>5</value></property>  
            <property name="minIdle"><value>1</value></property>  
            <!-- 配置获取连接等待超时的时间 -->  
            <property name="maxWait"><value>60000</value></property>  
            <!-- 配置监控统计拦截的filters -->  
            <property name="filters"><value>stat</value></property>  
            <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 -->  
            <property name="timeBetweenEvictionRunsMillis"><value>60000</value></property>  
            <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 -->  
            <property name="minEvictableIdleTimeMillis"><value>300000</value></property>  
            <!--  
            <property name="validationQuery"><value>SELECT 'x'</value></property>  
            <property name="testWhileIdle"><value>true</value></property>  
            <property name="testOnBorrow"><value>false</value></property>  
            <property name="testOnReturn"><value>false</value></property>  
            <property name="poolPreparedStatements"><value>true</value></property>  
            <property name="maxOpenPreparedStatements"><value>20</value></property>  
             -->  
        </bean>  
          
        <!-- mybatis配置 -->  
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
            <property name="dataSource" ref="dataSource" />  
        </bean>   
    </beans>     

    3.web.xml整合SpringMVC和Mybatis

    <?xml version="1.0" encoding="UTF-8"?>  
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">  
        <!-- 该servlet为tomcat,jetty等容器提供,将静态资源映射从/改为/static/目录,如原来访问 http://localhost/foo.css ,现在http://localhost/static/foo.css -->  
        <!-- 不拦截静态文件 -->  
        <servlet-mapping>  
            <servlet-name>default</servlet-name>  
            <url-pattern>/js/*</url-pattern>  
            <url-pattern>/css/*</url-pattern>  
            <url-pattern>/images/*</url-pattern>  
            <url-pattern>/fonts/*</url-pattern>  
        </servlet-mapping>  
          
        <!-- 配置字符集 -->  
        <filter>  
            <filter-name>encodingFilter</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>  
            <init-param>  
                <param-name>forceEncoding</param-name>  
                <param-value>true</param-value>  
            </init-param>  
        </filter>  
        <filter-mapping>  
            <filter-name>encodingFilter</filter-name>  
            <url-pattern>/*</url-pattern>  
        </filter-mapping>  
          
        <!-- 初始化 DispatcherServlet时,该框架在 web应用程序WEB-INF目录中寻找一个名为[servlet-名称]-servlet.xml的文件,  
                并在那里定义相关的Beans,重写在全局中定义的任何Beans -->  
        <servlet>  
            <servlet-name>springMybatis</servlet-name>  
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
            <load-on-startup>1</load-on-startup>  
        </servlet>  
        <servlet-mapping>  
            <servlet-name>springMybatis</servlet-name>  
            <!-- 所有的的请求,都会被DispatcherServlet处理 -->  
            <url-pattern>/</url-pattern>  
        </servlet-mapping>  
           
        <context-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>/WEB-INF/config/spring-*.xml</param-value>  
        </context-param>  
        <listener>  
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
        </listener>  
        <!-- druid web 监控 -->  
        <servlet>  
            <servlet-name>DruidStatView</servlet-name>  
            <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>  
        </servlet>  
        <servlet-mapping>  
            <servlet-name>DruidStatView</servlet-name>  
            <url-pattern>/druid/*</url-pattern>  
        </servlet-mapping>  
          
        <error-page>  
            <error-code>404</error-code>  
            <location>/error/404.jsp</location>  
        </error-page>  
        <error-page>  
            <error-code>500</error-code>  
            <location>/error/500.jsp</location>  
        </error-page>  
    </web-app>  

    4.logback.xml日志配置

    <?xml version="1.0" encoding="UTF-8"?>  
    <configuration>  
      
      <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">  
        <encoder>    
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>  
        </encoder>  
      </appender>  
        
      <logger name="test.LogbackTest" level="TRACE"/>  
        
      <logger name="com.alibaba.controller.TestController" level="TRACE"/>  
        
      <logger name="org.springframework.web.servlet.DispatcherServlet" level="DEBUG" />  
      <logger name="druid.sql" level="INFO" /><!-- 如果spring-config里面没有配置slf4j,就不会显示sql日志,logback只是slf4j的一个实现 -->  
      <root level="debug">  
        <appender-ref ref="STDOUT" />  
      </root>  
    </configuration>  

    5.configuration.properties配置

    jdbc.url=jdbc:mysql://localhost:3306/druid?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull  
    jdbc.username=root  
    jdbc.password=123456  

    6.测试搭建是否成功,后台代码

    首先是登录,用了加密,可以去掉

    package com.alibaba.controller;  
      
      
    import javax.annotation.Resource;  
    import javax.servlet.http.HttpServletRequest;  
      
    import org.apache.commons.codec.digest.DigestUtils;  
    import org.slf4j.Logger;  
    import org.slf4j.LoggerFactory;  
    import org.springframework.stereotype.Controller;  
    import org.springframework.web.bind.annotation.RequestMapping;  
    import org.springframework.web.bind.annotation.RequestMethod;  
    import org.springframework.web.bind.annotation.RequestParam;  
      
    import com.alibaba.model.User;  
    import com.alibaba.service.UserService;  
    import com.alibaba.util.RequestUtil;  
      
    /** 
     * @author tfj 
     * 2014-7-26 
     */  
    @Controller  
    public class SystemController {  
        private final Logger log = LoggerFactory.getLogger(SystemController.class);  
        @Resource  
        private UserService userService;  
          
        @RequestMapping(value = "/",method = RequestMethod.GET)  
        public String home() {  
            log.info("返回首页!");  
            return "index";  
        }  
          
        @RequestMapping(value = "/test/hello",method = RequestMethod.GET)  
        public String testHello() {  
            log.info("执行了testHello方法!");  
            return "testHello";  
        }  
          
        @RequestMapping(value = "/login",method = RequestMethod.POST)  
        public String testLogin(HttpServletRequest request,@RequestParam String username, @RequestParam String password) {  
            log.info("执行了testLogin方法!");  
            User user = userService.findUserByName(username);  
            if(user!=null){  
                if(user.getPassword().equals(DigestUtils.md5Hex(password))){  
                    request.getSession().setAttribute("userId", user.getId());    
                    request.getSession().setAttribute("user", username);    
                    return "redirect:" + RequestUtil.retrieveSavedRequest();//跳转至访问页面  
                }else{  
                    log.info("密码错误");    
                    request.getSession().setAttribute("message", "用户名密码错误,请重新登录");  
                    return "login";   
                }  
            }else{  
                log.info("用户名不存在");    
                request.getSession().setAttribute("message", "用户名不存在,请重新登录");  
                return "login";   
            }  
        }  
    }  

    关于service和model就不写了,写一下mybatis的mapper类映射

    <?xml version="1.0" encoding="UTF-8" ?>  
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">  
    <mapper namespace="com.alibaba.dao.UserMapper">      
        <select id="findUserByName" resultType="com.alibaba.model.User">  
            select id, username , password from sysuser where username = #{username}   
        </select>  
    </mapper>  

    7.前台jsp主要是登录和登录成功的页面,就不写了

    贴一下截图:

    到此,springmvc+mybatis整合成功。后续复杂的功能待添加

    注意事项

    1.框架中关于druid和logback的配置都是从官网上copy下来的,所以都是最基本的,读者可以忽略,也可以换成读者熟悉的数据库组件和日志框架,如c3p0和log4j。

    2.代码里加入了权限管理,即访问前需登录,登录后跳转至待访问页面,关于springmvc的权限管理请

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  • 原文地址:https://www.cnblogs.com/wqsbk/p/5317474.html
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