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Spring Mvc + Spring + Mybatis3 搭建Web工程详解

2019-11-14 08:50:29
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SPRing MVC + Spring + Mybatis3 搭建Web工程原理

可能需要用到参考:

Maven创建web项目:http://blog.csdn.net/liangmaoxuan/article/details/54172426

项目例子下载地址:http://download.csdn.net/detail/liangmaoxuan/9747471

Mybatis逆向工程:http://blog.csdn.net/liangmaoxuan/article/details/54563615

引入的jar包:

包也需要搭配正确,少包或错误版本包搭配也会出现未知的错误,会让人纠结死,网上也有很多同类型的包自己选择版本

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">	<modelVersion>4.0.0</modelVersion>	<groupId>com.lmx.ptest</groupId>	<artifactId>ptest</artifactId>	<packaging>war</packaging>	<version>0.0.1-SNAPSHOT</version>	<name>ptest Maven Webapp</name>	<url>http://maven.apache.org</url>	<properties>		<!-- spring版本号 -->		<spring.version>4.0.2.RELEASE</spring.version>		<!-- mybatis版本号 -->		<mybatis.version>3.2.6</mybatis.version>		<!-- log4j日志文件管理包版本 -->		<slf4j.version>1.7.7</slf4j.version>		<log4j.version>1.2.17</log4j.version>	</properties>	<dependencies>		<dependency>			<groupId>junit</groupId>			<artifactId>junit</artifactId>			<version>4.12</version>			<!-- 表示开发的时候引入,发布的时候不会加载此包 -->			<scope>test</scope>		</dependency>		<!-- spring核心包 -->		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-core</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-web</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-oxm</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-tx</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-jdbc</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-webmvc</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-aop</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-context-support</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-test</artifactId>			<version>${spring.version}</version>		</dependency>		<!-- mybatis核心包 -->		<dependency>			<groupId>org.mybatis</groupId>			<artifactId>mybatis</artifactId>			<version>${mybatis.version}</version>		</dependency>		<!-- mybatis/spring包 -->		<dependency>			<groupId>org.mybatis</groupId>			<artifactId>mybatis-spring</artifactId>			<version>1.2.2</version>		</dependency>		<!-- 导入java ee jar 包 -->		<dependency>			<groupId>javax</groupId>			<artifactId>javaee-api</artifactId>			<version>7.0</version>		</dependency>		<!-- 导入MySQL数据库链接jar包 -->		<dependency>			<groupId>mysql</groupId>			<artifactId>mysql-connector-java</artifactId>			<version>5.1.25</version>		</dependency>		<!-- 导入dbcp的jar包,用来在applicationContext.xml中配置数据库 -->		<dependency>			<groupId>commons-dbcp</groupId>			<artifactId>commons-dbcp</artifactId>			<version>1.2.2</version>		</dependency>		<!-- JSTL标签类 -->		<dependency>			<groupId>jstl</groupId>			<artifactId>jstl</artifactId>			<version>1.2</version>		</dependency>		<!-- 日志文件管理包 -->		<!-- log start -->		<dependency>			<groupId>log4j</groupId>			<artifactId>log4j</artifactId>			<version>${log4j.version}</version>		</dependency>		<!-- 格式化对象,方便输出日志 -->		<dependency>			<groupId>com.alibaba</groupId>			<artifactId>fastjson</artifactId>			<version>1.1.41</version>		</dependency>		<dependency>			<groupId>org.slf4j</groupId>			<artifactId>slf4j-api</artifactId>			<version>${slf4j.version}</version>		</dependency>		<dependency>			<groupId>org.slf4j</groupId>			<artifactId>slf4j-log4j12</artifactId>			<version>${slf4j.version}</version>		</dependency>		<!-- log end -->		<!-- 映入JSON -->		<dependency>			<groupId>org.codehaus.jackson</groupId>			<artifactId>jackson-mapper-asl</artifactId>			<version>1.9.13</version>		</dependency>		<!-- 上传组件包 -->		<dependency>			<groupId>commons-fileupload</groupId>			<artifactId>commons-fileupload</artifactId>			<version>1.3.1</version>		</dependency>		<dependency>			<groupId>commons-io</groupId>			<artifactId>commons-io</artifactId>			<version>2.4</version>		</dependency>		<dependency>			<groupId>commons-codec</groupId>			<artifactId>commons-codec</artifactId>			<version>1.9</version>		</dependency>		<dependency>			<groupId>com.fasterxml.jackson.core</groupId>			<artifactId>jackson-core</artifactId>			<version>2.7.8</version>		</dependency>		<dependency>			<groupId>org.mockito</groupId>			<artifactId>mockito-all</artifactId>			<version>1.10.19</version>		</dependency>		<dependency>			<groupId>junit</groupId>			<artifactId>junit</artifactId>			<version>4.12</version>		</dependency>	</dependencies>	<build>		<plugins>			<plugin>				<groupId>org.apache.maven.plugins</groupId>				<artifactId>maven-compiler-plugin</artifactId>				<version>2.3.2</version>				<configuration>					<source>1.7</source>					<target>1.7</target>				</configuration>			</plugin>		</plugins>		<finalName>ptest</finalName>	</build></project>

1.设置web.xml

(1)spring 方面:

spring 启动时候会首先去执行放在WEB-INF/目录下applicationContext.xml文件(如果在web.xml中不写任何参数配置信息,默认的路径是"/WEB-INF/applicationContext.xml),在启动Web 容器时,自动装配Spring applicationContext.xml 的配置信息。

PS:

WEB-INF目录下创建的xml文件的名称必须是applicationContext.xml。如果是要自定义文件名可以在web.xml里加入contextConfigLocation这个context参数,多个相同前缀也可以使用通配符(*).

ContextLoaderListener的作用就是启动Web容器时,自动装配ApplicationContext的配置信息。系统启动的时候,系统自动加载org.springframework.web.context.ContextLoaderListener这个类,然后由它负责创建Spring容器即WebApplicationContext,系统会把bean放在其中,保存在内存,需要时候就会取出,一般情况下,创建完成后,负责IOC操作,你不需要获取它,如果非要在程序中调用它,可以通过WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);来获取这个容器。

 <!-- Spring监听器 -->      <listener>          <listener-class>               org.springframework.web.context.ContextLoaderListener         </listener-class>      </listener>  

对应的重命名applicationContext.xml文件改名后指定的位置
    <!-- Spring和mybatis的配置文件 -->      <context-param>          <param-name>contextConfigLocation</param-name>          <param-value>classpath:spring-mybatis.xml</param-value>      </context-param>  

(2)spring MVC方面:

容器初始化时候一同初始化Servlet,并且监听指定入口(/,*.do,*.action等),监听被激活时候,进入spring MVC处理并且返回输出

  <!-- Spring MVC servlet -->      <servlet>          <servlet-name>SpringMVC</servlet-name>          <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>          <init-param>          <!-- 对应的XML文件 -->                <param-name>contextConfigLocation</param-name>                         <param-value>classpath:spring-mvc.xml</param-value>          </init-param>          <!-- 初始化时候启动 -->          <load-on-startup>1</load-on-startup>          <async-supported>true</async-supported>      </servlet>      <servlet-mapping>          <servlet-name>SpringMVC</servlet-name>          <url-pattern>/</url-pattern>      </servlet-mapping>  

2.设置XML

(1)Spring 对应的spring-mybatis.xml文件设置

<?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:p="http://www.springframework.org/schema/p"	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-3.1.xsd  	http://www.springframework.org/schema/context  	http://www.springframework.org/schema/context/spring-context-3.1.xsd  	http://www.springframework.org/schema/mvc  	http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">	<!--会对base-package包或者子包下的所有的进行java类进行扫描,并把匹配的java类注册成bean。 -->	<context:component-scan base-package="com.lmx" />	<!-- 开启注解模式 PS:要使用spring mvc中的@Controller注解,就必须要配置<mvc:annotation-driven 		/>, 否则org.springframework.web.servlet.DispatcherServlet无法找到控制器并把请求分发到控制器 -->	<mvc:annotation-driven />	<!-- 通过把对应值发射进入class类内组建dataSource对象 以下只需通过ID反射调用传送对象 -->	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"		destroy-method="close">		<property name="driverClassName" value="com.mysql.jdbc.Driver" />		<property name="url" value="jdbc:mysql://localhost:3306/netcare_db" />		<property name="username" value="root" />		<property name="passWord" value="" />	</bean>	<!-- 通过把对应值发射进入class类内组建datsqlsessionFactory对象 以下只需通过ID反射调用传送对象 -->	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">		<property name="dataSource" ref="dataSource" />		<property name="mapperLocations" value="classpath:mapping/*.xml"></property>	</bean>	<!-- MapperScannerConfigurer 自动扫描 将Mapper接口生成代理注入到Spring -->	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">		<property name="basePackage" value="com.lmx"></property>		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>	</bean>	<!-- 创建sqlSessionTemplate类 -->	<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">		<constructor-arg index="0" ref="sqlSessionFactory" />	</bean>	<!-- 创建事务 -->	<bean id="transactionManager"		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">		<property name="dataSource" ref="dataSource" />	</bean></beans>  

(1)Spring 对应的spring-MVC.xml文件设置

<?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:p="http://www.springframework.org/schema/p"      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-3.1.xsd                            http://www.springframework.org/schema/context                            http://www.springframework.org/schema/context/spring-context-3.1.xsd                            http://www.springframework.org/schema/mvc                            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">              <!--避免IE执行Ajax时,返回JSON出现下载文件 -->      <bean id="mappingJacksonHttpMessageConverter"          class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">          <property name="supportedMediaTypes">              <list>                  <value>text/html;charset=UTF-8</value>              </list>          </property>      </bean>      <!-- 启动SpringMVC的注解功能,完成请求和注解POJO的映射 -->      <bean          class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">          <property name="messageConverters">              <list>                  <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 -->              </list>          </property>      </bean>      <!-- 定义跳转的文件的前后缀 ,视图模式配置-->      <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">          <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 -->          <property name="prefix" value="/WEB-INF/jsp/" />          <property name="suffix" value=".jsp" />      </bean>        </beans>  

到这里配置已经完成。

总结不好多多担待,文章只单纯个人总结,如不好勿喷,技术有限,有错漏麻烦指正提出。本人QQ:373965070


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