Spring MVC + Mybatis 环境搭建

来源：互联网发布：arm linux centos 编辑：程序博客网时间：2024/06/11 13:18

使用Spring MVC和Mybatis也做过几个项目了，一直没有整理过搭建过程，所以最近重新开始搞了一个最最基础的example，只有一个登陆，但是基础配置还是相对完整的，可供新人参考思路。该项目使用maven进行管理，如果有不理解的地方可自行搜索相关文档学习一下，也可去http://blog.csdn.net/qq_19656425找从零开始系列博客进行了解。
首先建立一个空的maven项目，在pom文件中配置好相关依赖。
配置web.xml文件

<!-- 该listener可视情况选择是否配置 --><listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:spring-config.xml</param-value>    </context-param>    <!-- html页面和静态资源交给容器（Tomcat、Jetty等）处理 -->    <servlet-mapping>        <!-- 容器默认的servlet名 -->        <servlet-name>default</servlet-name>        <url-pattern>*.html</url-pattern>        <url-pattern>/static/</url-pattern>    </servlet-mapping>    <!-- 该项目中使用rest servlet拦截restful风格的请求，统一返回json字符串或json对象 -->    <servlet>        <servlet-name>rest</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:rest-servlet.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>rest</servlet-name>        <!-- 如果访问/rest/login，会截掉前缀使用/login进行requestMapping的匹配 -->        <url-pattern>/rest/*</url-pattern>    </servlet-mapping>    <!-- 该servlet拦截的请求返回jsp页面 -->    <servlet>        <servlet-name>pages</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:pages-servlet.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>pages</servlet-name>        <url-pattern>/pages/*</url-pattern>    </servlet-mapping>

web.xml的主要配置就这么多，rest和pages两个servlet可以根据需要一般只配置一个统一的即可。
spring-config.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:tx="http://www.springframework.org/schema/tx"       xmlns:mvc="http://www.springframework.org/schema/mvc"       xmlns:context="http://www.springframework.org/schema/context"       xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"       xsi:schemaLocation="http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context.xsd       http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd       http://www.springframework.org/schema/tx       http://www.springframework.org/schema/tx/spring-tx.xsd       http://www.springframework.org/schema/mvc       http://www.springframework.org/schema/mvc/spring-mvc.xsd       http://mybatis.org/schema/mybatis-spring       http://mybatis.org/schema/mybatis-spring.xsd">    <!-- 开始Spring MVC功能 -->    <mvc:annotation-driven/>    <context:component-scan base-package="com.heuman.service"/>    <!-- 扫描base-package包下的接口并注册成bean -->    <mybatis:scan base-package="com.heuman.mapper"/>    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">            <list>                <!-- 数据库配置资源文件 -->                <value>classpath:properties/db.properties</value>            </list>        </property>    </bean>    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="dataSource"/>        <property name="typeAliasesPackage" value="com.heuman.vo"/>        <property name="mapperLocations" value="classpath*:com/heuman/mapper/xml/**/*.xml"/>        <!--<property name="typeHandlersPackage" value="com.heuman.config.mybatis.typehandler"/>-->        <property name="configuration">            <bean class="org.apache.ibatis.session.Configuration">                <property name="mapUnderscoreToCamelCase" value="true"/>            </bean>        </property>    </bean>    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">        <!-- 数据库基本信息配置，可以使用${key}从上面配置的资源文件中拿对应的value -->        <property name="url" value="${url}"/>        <property name="username" value="${username}"/>        <property name="password" value="${password}"/>        <property name="driverClassName" value="${driverClassName}"/>        <property name="maxActive" value="${maxActive}"/>        <property name="initialSize" value="${initialSize}"/>        <property name="maxWait" value="${maxWait}"/>        <property name="minIdle" value="${minIdle}"/>        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->        <property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis}"/>        <!-- 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="${minEvictableIdleTimeMillis}"/>        <property name="validationQuery" value="${validationQuery}"/>    </bean>    <!-- 配置事务 -->    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource"/>    </bean>    <!-- 使用@Transactional开启事务（注：方法修饰符必须为public） -->    <tx:annotation-driven transaction-manager="transactionManager"/></beans>

db.properties

url=jdbc:mysql://localhost:3306/testdriverClassName=com.mysql.jdbc.Driverusername=rootpassword=adminmaxActive=20initialSize=1maxWait=30000minIdle=1timeBetweenEvictionRunsMillis=60000minEvictableIdleTimeMillis=300000validationQuery=SELECT 1

rest-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"       xsi:schemaLocation="http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context.xsd       http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd       http://www.springframework.org/schema/mvc       http://www.springframework.org/schema/mvc/spring-mvc.xsd">    <mvc:annotation-driven>        <!-- 使用fastjson对json（content-type为application/json）进行解析（Spring MVC默认使用jackson） -->        <mvc:message-converters register-defaults="true">            <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter4">                <property name="fastJsonConfig">                    <bean class="com.alibaba.fastjson.support.config.FastJsonConfig">                        <property name="dateFormat" value="yyyy-MM-dd"/>                    </bean>                </property>                <property name="supportedMediaTypes">                    <list>                        <bean class="org.springframework.http.MediaType">                            <constructor-arg type="java.lang.String" value="application"/>                            <constructor-arg type="java.lang.String" value="json"/>                        </bean>                    </list>                </property>            </bean>        </mvc:message-converters>    </mvc:annotation-driven>    <context:component-scan base-package="com.heuman.controller.rest"/></beans>

pages-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"       xsi:schemaLocation="http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context.xsd       http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd       http://www.springframework.org/schema/mvc       http://www.springframework.org/schema/mvc/spring-mvc.xsd">    <mvc:annotation-driven/>    <context:component-scan base-package="com.heuman.controller.page"/>    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">        <property name="prefix" value="/WEB-INF/pages/"/>        <property name="suffix" value=".jsp"/>    </bean></beans>

LoginController.java

@Controllerpublic class LoginController {    private final transient Logger logger = LoggerFactory.getLogger(LoginController.class);    @Autowired    private UserService userService;    @RequestMapping(value = "/login", method = RequestMethod.POST, consumes = {"application/json"})    @ResponseBody    public Object login(@RequestBody User user, HttpSession session) {        if (logger.isDebugEnabled()) {            logger.debug(user.toJson());        }        // 已经登录        if (session.getAttribute("user") != null) {            return Result.newSuccessResult().toJson();        }        String errorMsg;        if (StringUtils.isBlank(user.getUsername()) || StringUtils.isBlank(user.getPassword())) {            errorMsg = "用户名和密码不能为空";        } else {            User u = userService.findByUsernamePassword(user);            if (u == null) {                errorMsg = "用户名或密码错误";            } else {                if (logger.isInfoEnabled()) {                    logger.info("####### {} login #######", u.getUsername());                }                session.setAttribute("user", u);                return Result.newSuccessResult().toJson();            }        }        Result result = Result.newErrorResult();        result.setMsg(errorMsg);        return result.toJson();    }    @RequestMapping(value = "/logout")    public String logout(HttpSession session) {        session.removeAttribute("user");        return PathUtil.append("redirect:", Config.getPagesPath(), "/index");    }}

注：toJson方法是自定义的对象转json
UserService.java

@Servicepublic class UserService {    private final transient Logger logger = LoggerFactory.getLogger(UserService.class);    @Autowired    private UserMapper userMapper;    public User findByUsernamePassword(User user) {        return userMapper.findByUsernameAndPassword(user.getUsername(), user.getPassword());    }}

UserMapper.java

@Mapperpublic interface UserMapper {    //也可不用@Param，而使用#{param1}，#{param2}...去获取参数    @Select("select * from user where username=#{username} and password=#{password}")    User findByUsernameAndPassword(@Param("username") String username, @Param("password") String password);}

HomeController.java

@Controllerpublic class HomeController {    private final transient Logger logger = LoggerFactory.getLogger(HomeController.class);    @RequestMapping("/index")    public String index(HttpSession session, Model model) {        if (session.getAttribute("user") != null) {            model.addAttribute("username", ((User)session.getAttribute("user")).getUsername());            return "index";        }        return "logout";    }}

login.html页面是登录页面，当用户登录时通过ajax访问/rest/login页面，如果返回结果表示登录成功，则转到/pages/index，HomeController类中的index方法接收到该请求把username放到request中，接着转到/WEB-INF/pages/index.jsp页面。
index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %><!DOCTYPE html><html lang="zh-cmn-Hans"><head>    <title>首页</title></head><body><div>    <h4><%=request.getAttribute("username")%>, HelloWorld welcome you!</h4></div></body></html>

代码已上传到github：https://github.com/heumanpub/ssm-example，细节解释的不多，不理解的地方可以google。

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