SpringMVC+MyBatis分页（最新）

Z时代
2024-01-10
分类：IT

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：