Web MVC
The Spring Web model-view-controller (MVC) framework is designed around a DispatcherServlet that dispatches requests to handlers,
with configurable handler mappings, view resolution, locale, time zone and theme resolution as well as support for uploading files.
The default handler is based on the @Controller and @RequestMapping annotations, offering a wide range of flexible handling methods.
Hello World
The src files tree.
|____main
| |____java
| | |____com
| | | |____ryo
| | | | |____controller
| | | | | |____HelloController.java
| |____resources
| | |____app-mvc.xml
| | |____app.xml
| | |____log4j2.xml
| |____webapp
| | |____WEB-INF
| | | |____web.xml
- pom.xml
<?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.ryo</groupId>
<artifactId>springmvc</artifactId>
<version>1.0.0</version>
<packaging>war</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<plugin.tomcat.version>2.2</plugin.tomcat.version>
<maven-surefire-plugin.version>2.18.1</maven-surefire-plugin.version>
<maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>
<!-- Spring -->
<spring.version>4.2.6.RELEASE</spring.version>
</properties>
<dependencies>
<!--spring mvc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.6.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>${plugin.tomcat.version}</version>
<configuration>
<port>8080</port>
<path>/</path>
<uriEncoding>${project.build.sourceEncoding}</uriEncoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<skipTests>true</skipTests>
<testFailureIgnore>true</testFailureIgnore>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
- web.xml
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<!--装入spring配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:app.xml</param-value>
</context-param>
<!-- 以Listener方式启动spring -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 前端控制器的配置 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:app-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
- app.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="app-mvc.xml"/>
</beans>
- app-mvc.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: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.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">
<!--扫描@Controller注解-->
<context:component-scan base-package="com.ryo.controller">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
</context:component-scan>
<mvc:annotation-driven/>
</beans>
- HelloController.java
package com.ryo.controller;
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.ResponseBody;
/**
* Created by houbinbin on 16/6/19.
*/
@Controller
@RequestMapping("hello")
public class HelloController {
@RequestMapping(method = RequestMethod.GET)
@ResponseBody
public String hello() {
return "hello world";
}
}
- visit
http://localhost:8080/hello
- result
hello world
Controller log
- pom.xml
<!--log4j-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j.version}</version>
</dependency>
- define controller call interceptor.
package com.ryo.interceptor;
import com.alibaba.fastjson.JSON;
import com.ryo.constants.SessionKeys;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
/**
* Created by houbinbin on 16/6/30.
* - Controller 访问日志
*/
@Component
@Aspect
public class ControllerLogInterceptor {
static Logger logger = LogManager.getLogger();
private String requestPath = null; // 请求地址
private String userName = null; // 用户名
private Map<?, ?> inputParamMap = null; // 传入参数
private Map<String, Object> outputParamMap = null; // 存放输出结果
@Pointcut("execution(public * com.ryo.controller..*.*(..))")
public void myPointcut() {
}
@Before("myPointcut()")
public void start() {
}
@After("myPointcut()")
public void end() {
printLog();
}
@Around("myPointcut()")
public Object around(ProceedingJoinPoint point) throws Throwable {
/**
* 1.获取request信息
* 2.根据request获取session
* 3.从session中取出登录用户信息
*/
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
// 从session中获取用户信息
userName = (String) request.getSession().getAttribute(SessionKeys.SESSION_USERNAME);
// 获取输入参数
inputParamMap = request.getParameterMap();
// 获取请求地址
requestPath = request.getRequestURI();
// 执行完方法的返回值：调用proceed()方法，就会触发切入点方法执行
outputParamMap = new HashMap<String, Object>();
Object result = point.proceed(); // result的值就是被拦截方法的返回值
outputParamMap.put("result", result);
return result;
}
private void printLog() {
logger.info("USER：" + userName
+ " URL：" + requestPath + "\n"
+ "Param：" + JSON.toJSON(inputParamMap) + "\n" + "Result：" + JSON.toJSON(outputParamMap)+"\n");
}
}
更多学习
更多实时资讯，前沿技术，生活趣事。尽在【老马啸西风】
交流社群：[交流群信息](https://mp.weixin.qq.com/s/rkSvXxiiLGjl3S-ZOZCr0Q)
