想起之前提起来 springmvc就是 xml配置文件，但是最近看了一些书籍发现 spring已经支持类的方式了，便一边学习，一边记录
其中使用的开发工具是 idea

1 SpringMVC无XML项目

1.1 SpringMVC项目预览

不是使用springboot的，因此搭建完毕后需要使用tomcat来启动项目

1.2 pom.xml

<dependency><groupId>javax</groupId><artifactId>javaee-web-api</artifactId><version>7.0</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.2.9.RELEASE</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>5.2.9.RELEASE</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><!-- 使用slf4j和logback作为日志 --><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>1.7.25</version></dependency><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.16</version></dependency><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.16</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>jcl-over-slf4j</artifactId><version>1.7.25</version></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-classic</artifactId><version>1.2.3</version></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-core</artifactId><version>1.2.3</version></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-access</artifactId><version>1.2.3</version></dependency>

1.3 配置SpringMVC

之前配置SpringMVC都是使用的springmvc.xml文件，然后在webxml中引用即可
使用配置类的方式来配置类似于springmvc.xml中的文件

package cn.jzh.config;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;@Configuration
@EnableWebMvc
@ComponentScan("cn.jzh")
public class MyMvcConfig {/*** 此处相当于web项目中 springmvc.xml文件*/@Beanpublic InternalResourceViewResolver viewResolver (){InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();viewResolver.setPrefix("/WEB-INF/views/");viewResolver.setSuffix(".jsp");viewResolver.setViewClass(JstlView.class);return viewResolver;}
}

1.4 配置Web

之前配置web文件都是在webapp\WEB-INF\web.xml中的，现在不用xml文件那么使用配置类如下：

package cn.jzh.config;import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;public class WebInitializer implements WebApplicationInitializer {/*** 此处相当于  web项目中 web.xml文件*/@Overridepublic void onStartup(ServletContext servletContext) throws ServletException {AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();context.register(MyMvcConfig.class);context.setServletContext(servletContext);ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(context));dispatcher.addMapping("/");dispatcher.setLoadOnStartup(1);}
}

1.5 简单控制层

package cn.jzh.controller;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.ResponseBody;@Controller
public class JspController {private final static Logger log = LoggerFactory.getLogger(JspController.class);@RequestMapping(value="/index")public String hello(){System.out.println("=======================");log.info("jsp的demo日志。。。。。。。。。。。");System.out.println("=======================");return "index";}
}

注意：不要添加@ResponseBody注解，否则页面不会跳转而是在浏览器上显示一个index的字符串

1.6 配置日志

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="5 seconds"><contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator"><restJUL>true</restJUL></contextListener><appender name="console" class="ch.qos.logback.core.ConsoleAppender"><encoder><pattern>%-4relative %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{35} - %msg %n</pattern></encoder></appender><root level="DEBUG"><appender-ref ref="console" /></root>
</configuration>

此处的日志配置文件可能不太明白，推荐日志参考文件：Logback文件详解

1.7 运行测试

其中两个index.xml文件就不在此放了，就是为了验证能否跳转到WEB-INF中的文件，没有具体逻辑和代码
直接放在tomcat中就可以运行测试

点击此处了解xml配置的springmvc项目