Spring+Spring MVC环境（Xml）搭建
1.创建工程
1.添加spring-webmvc依赖
<?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.xuxx</groupId>
<artifactId>java_ssm</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.2.RELEASE</version>
</dependency>
</dependencies>
</project>
2.打开项目结构，添加webapp目录和web.xml文件
2.创建配置文件
1.spring
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--开启包扫描 排除加了@Controller的类-->
<context:component-scan base-package="com.xuxx" use-default-filters="true" >
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
2.spring-mvc
<?xml version="1.0" encoding="UTF-8"?>
<beans....
<!--开启包扫描 只扫描带有@Controller的类-->
<context:component-scan base-package="com.xuxx" use-default-filters="true">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--开启mvc driven-->
<mvc:annotation-driven/>
</beans>
3.web.xml（简易版）
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!--spring的配置-->
<!--加载spring配置文件的路径-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--启动Web容器时，自动装配ApplicationContext.xml的配置信息-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--spring Mvc的配置-->
<servlet>
<servlet-name>springmvc</servlet-name>
<!--前端控制器，用于控制所有请求-->
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
<!--关于 <url-pattern></url-pattern>有三种配置方式:
(1)<url-pattern> / </url-pattern> ， /：配置/的话，url不会拦截诸如：jsp，html ， .action的请求，使用该模式的话，那么 spring-mvc.xml中配置name不能有扩展名 ，如下：
<bean name="/userController" class="com.neusoft.springmvc.controller.UserController"></bean>（正确）
<bean name="/userController.action" class="com.neusoft.springmvc.controller.UserController"></bean>（错误）
(2)<url-pattern> / *</url-pattern> ， /*，因为这个url会拦截所有请求，包括：.jsp .html .action .do .css
如果访问以上的资源会报404错误 ，所以配置时，不要用/*， 这个一般是过滤器，配置时候才用的。
(3)<url-pattern> *.action</url-pattern> 不会拦截诸如 .jsp .html 等资源请求，只会拦截.action请求，所有在spring-mvc.xml中配 置name的时候必须要有扩展名，如下： <bean name="/userController" class="com.neusoft.springmvc.controller.UserController"></bean>（错误）
<bean name="/userController.action" class="com.neusoft.springmvc.controller.UserController"></bean>（正确） -->
</servlet-mapping>
</web-app>
4.web.xml(详细版)
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<!--注意版本↑↑↑-->
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!--welcome pages-->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!--applicationContext.xml是全局的，应用于多个serverlet，配合listener一起使用-->
<!-- 如果是监听多个文件，可用‘，’隔开 -->
<context-param>
<description>配置Spring配置文件路径</description>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext.xml</param-value>
</context-param>
<!-- 定义SPRING监听器，加载spring -->
<listener>
<listener-class>
org.springframework.web.context.request.RequestContextListener
</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--log4j配置文件加载-->
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:log4j.properties</param-value>
</context-param>
<!--启动一个watchdog线程每1800秒扫描一下log4j配置文件的变化-->
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>1800000</param-value>
</context-param>
<context-param>
<param-name/>
<param-value/>
</context-param>
<!-- 配置Spring字符编码过滤器 -->
<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>
<!-- Spring MVC 核心控制器 DispatcherServlet 配置开始 -->
<!--配置springmvc DispatcherServlet-->
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<!--Sources标注的文件夹下需要新建一个spring文件夹-->
<param-name>contextConfigLocation</param-name>
<!-- 如果是监听多个文件，可用‘，’隔开 -->
<param-value>classpath:spring/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<!-- 拦截设置 -->
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<!-- 此处可以可以配置成*.do，对应struts的后缀习惯 -->
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Spring MVC 核心配置结束 -->
<!-- 激活Tomcat的defaultServlet来处理静态文件 -->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/static/*</url-pattern>
</servlet-mapping>
<!-- session 时间 -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
</web-app>
3.测试web-mvc环境
1.添加本地Tomcat
一开始访问时的路径加没加项目名（都是泪
2.新建controller和service
controller
@RestController
public class HelloController {
@Autowired
HelloService helloService;
@GetMapping("/hello")
//@GetMapping(value = "/hello",produces = "text/html;charset=utf-8") 可以简单解决中文乱码
public String hello() {
return helloService.sayHello();
}
}
service
@Service
public class HelloService {
public String sayHello() {
return "Hello World";
}
}
3.访问,成功
