從無到有整合SpringMVC-MyBatis專案（2）：搭建SpringMVC專案
阿新 • • 發佈：2019-02-02
前言：本次搭建SpringMVC專案，建立在已完成從無到有整合SpringMVC-MyBatis專案（1）：搭建JavaWeb專案 的基礎上，本篇的重點在於如何將SpringMVC框架引入到普通的JavaWeb專案中去，專案基於SpringMVC4.3.18版本進行搭建，所有配置親測可用；
疑難點分析：搭建SpringMVC專案的難點在於如何建立起各種XXX.xml配置檔案的關係，以及每個配置檔案中的每行配置是什麼作用，搞清楚了這些，針對自己不懂得點有針對性的學習，會事半功倍。先交代下本次搭建用到的工具和框架：
- 開發工具：Idea 2018.2.2
- spring框架版本：4.3.18.release
- maven版本：3.5.2
首先看看搭建完成之後的專案結構：
新增了HelloController和HelloService類，在WEN-INF下新增SpringMVC的配置檔案，applicationContext.xml和SpringMVC-servlet.xml，在本次搭建中，採用父子容器的概念，即SpringMVC-servlet.xml只配置controller相關的，業務交給applicationContext.xml；
好了，開始搭建：
1、引入SpringMVC和切面依賴，最終pom.xml如下：
<?xml version="1.0" encoding="UTF-8"?> <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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.dongnao</groupId> <artifactId>SpringMVC-Sample</artifactId> <version>1.0.0</version> <packaging>war</packaging> <name>SpringMVC-Sample</name> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <dependencies> <!-- 引入SpringMVC --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.18.RELEASE</version> </dependency> <!-- 引入切面依賴 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.8.9</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.8.10</version> </dependency> <!-- 引入Servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <!-- 引入JSP --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> <!-- 引入JSTL --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> <scope>runtime</scope> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> </dependencies> </project>
2、找到web.xml，進行如下配置：
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
3、SpringMVC-servlet.xml配置如下：
<?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/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- 配置自動掃描controller包下面帶有@Controller註解的類 -->
<context:component-scan base-package="com.dongnao.controller">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
</context:component-scan>
<!-- 開啟MVC註解驅動，請求分發必須 -->
<mvc:annotation-driven />
<!-- 配置靜態資源處理 -->
<mvc:resources mapping="/static/**" location="/resources/" />
<!-- 配置檢視解析器 將邏輯檢視名對映為物理檢視名 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name = "prefix" value="/WEB-INF/views/"></property>
<property name = "suffix" value = ".jsp"></property>
</bean>
</beans>
4、applicationContext.xml 配置
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
<!-- 掃描業務程式碼 -->
<context:component-scan base-package="com.dongnao">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Service"></context:include-filter>
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>
<!-- 開啟aop支援 -->
<aop:aspectj-autoproxy />
</beans>5、HelloController類如下，就是一個普通的Controller，程式碼如下：
import com.dongnao.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class HelloController {
@Autowired
private HelloService helloService;
@GetMapping("/helloMvc")
public ModelAndView helloMvc(String msg) {
helloService.sayHello(msg);
ModelAndView mv = new ModelAndView();
mv.addObject("msg", "搭建SpringMVC專案成功");
mv.setViewName("helloMvc");
return mv;
}
}6、HelloService類如下：
import org.springframework.stereotype.Service;
@Service
public class HelloService {
public void sayHello(String msg){
System.out.println(msg);
}
}7、helloMvc.jsp程式碼如下：
