SpringMVC+MyBatis（最新）

目前主流的Web MVC框架，除了Struts這個主力 外，還有Spring MVC，主要是由於Spring MVC配置比較簡單，使用起來也十分明瞭，非常靈活，與Spring 集成較好，對RESTful API的支持也比struts要好。
MyBatis是ibatis的升級版，作爲hibernate的老對手，它 是一個可以自定義SQL、存儲過程和高級映射的持久層框架。
與hibernate的主要區別就是mybatis是半自動化的，而hibernate是全自動的，所以當應用需求越來越複雜的時候，自動化的sql顯得比較笨拙。
由於前段時間接了個項目要用springmvc做，所以我抱着練手的態度，又玩起了整合框架的遊戲。經常搭框架的人應該都清楚，框架搭建的核心就是配置文件。所以我主要貼下幾個配置文件的代碼。還是那句話，我都是寫好配置文件之後，運行報錯再加jar。這裏列一下我用的jar包（應該是最少的）：

備註：上圖有一些額外的jar，比如我用的數據庫連接池是阿里巴巴的druid、日誌框架式logback，所以引入了相關jar。關於這兩個框架的使用和配置都是非常簡單的，所以這裏就不細說。
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">

        <!-- 啓用spring mvc 註解-->
    <mvc:annotation-driven>
    </mvc:annotation-driven>

    <!-- 自動掃描的包名 ，使Spring支持自動檢測組件，如註解的Controller-->
    <context:component-scan base-package="com.alibaba.controller" />
    <context:component-scan base-package="com.alibaba.service"/>


    <!-- 視圖解析器:定義跳轉的文件的前後綴 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />  <!--可爲空,方便實現自已的依據擴展名來選擇視圖解釋類的邏輯  -->
    </bean>

    <!--配置攔截器, 多個攔截器,順序執行 -->
    <mvc:interceptors>
        <mvc:interceptor>
            <!-- 匹配的是url路徑  -->
            <mvc:mapping path="/" />
            <mvc:mapping path="/user/**" />
            <mvc:mapping path="/test/**" />

            <bean class="com.alibaba.interceptor.CommonInterceptor"></bean>
        </mvc:interceptor>
        <!-- 當設置多個攔截器時，先按順序調用preHandle方法，然後逆序調用每個攔截器的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">

    <!-- 該包下的類支持註解，表示會被當作{@code mybatis mapper}處理 配置了之後表示可以自動引入mapper類-->
    <mybatis:scan base-package="com.alibaba.dao"/>
    <!--引入屬性文件 -->
    <context:property-placeholder location="classpath:configuration.properties"/>

    <!--數據庫連接-->
    <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>
        <!-- 配置獲取連接等待超時的時間 -->
        <property name="maxWait"><value>60000</value></property>
        <!-- 配置監控統計攔截的filters -->
        <property name="filters"><value>stat</value></property>
        <!-- 配置間隔多久才進行一次檢測，檢測需要關閉的空閒連接，單位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis"><value>60000</value></property>
        <!-- 配置一個連接在池中最小生存的時間，單位是毫秒 -->
        <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">
    <!--　該servlet爲tomcat,jetty等容器提供,將靜態資源映射從/改爲/static/目錄，如原來訪問　http://localhost/foo.css　,現在http://localhost/static/foo.css　-->
    <!-- 不攔截靜態文件 -->
    <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時，該框架在 web應用程序WEB-INF目錄中尋找一個名爲[servlet-名稱]-servlet.xml的文件，
            並在那裏定義相關的Beans，重寫在全局中定義的任何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>
        <!-- 所有的的請求，都會被DispatcherServlet處理 -->
        <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 監控 -->
    <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日誌配置

<?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裏面沒有配置slf4j,就不會顯示sql日誌，logback只是slf4j的一個實現 -->
  <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.測試搭建是否成功，後臺代碼

首先是登錄，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("返回首頁！");
        return "index";
    }

    @RequestMapping(value = "/test/hello",method = RequestMethod.GET)
    public String testHello() {
        log.info("執行了testHello方法！");
        return "testHello";
    }

    @RequestMapping(value = "/login",method = RequestMethod.POST)
    public String testLogin(HttpServletRequest request,@RequestParam String username, @RequestParam String password) {
        log.info("執行了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();//跳轉至訪問頁面
            }else{
                log.info("密碼錯誤");
                request.getSession().setAttribute("message", "用戶名密碼錯誤，請重新登錄");
                return "login";
            }
        }else{
            log.info("用戶名不存在");
            request.getSession().setAttribute("message", "用戶名不存在，請重新登錄");
            return "login";
        }
    }
}

關於service和model就不寫了，寫一下mybatis的mapper類映射

<?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>