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SpringMVC+MyBatis(最新) springmvc框架beanstruts 

程序员文章站 2022-07-10 19:16:22
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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:

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<?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:

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<?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

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<?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

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<?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

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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

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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

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<?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> 



源码来源: minglisoft.cn/technology