不用web.xml,而使用java類配置SpringMVC
DispatcherServlet是Spring MVC的核心,按照傳統方式, 需要把它配置到web.xml中. 我個人比較不喜歡XML配置方式, XML看起來太累, 冗長繁瑣. 還好借助于Servlet 3規范和Spring 3.1的功能增強, 可以采用一種全新的,更簡潔的方式配置Spring MVC了. 下面按這種方式一個Hello World的MVC配置.
Step 1:先用idea創建一個Maven的WEB工程. pom.xml文件如下:
OcrWebAppInitializer:
package com.home.config;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;public class OcrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {@Overrideprotected Class<?>[] getRootConfigClasses() {return new Class<?>[] { RootConfig.class };}@Overrideprotected Class<?>[] getServletConfigClasses() {return new Class<?>[] { WebConfig.class }; ? ? ? ?//?指定Web配置類}@Overrideprotected String[] getServletMappings() { ? ?//將DispatcherServlet映射到"/"return new String[] { "/" };}}RootConfig
package com.home.config;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.ComponentScan.Filter;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.FilterType;import org.springframework.web.servlet.config.annotation.EnableWebMvc;@Configuration@ComponentScan( basePackages={"com.home"},excludeFilters = { @Filter(type=FilterType.ANNOTATION,value=EnableWebMvc.class)})public class RootConfig {}
WebConfig
package com.home.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.ViewResolver;import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;import org.springframework.web.servlet.config.annotation.EnableWebMvc;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;import org.springframework.web.servlet.view.InternalResourceViewResolver;@Configuration@EnableWebMvc ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?//啟動SpringMVC@ComponentScan("com.home.controller") ? ? ? ? ? ?//啟動組件掃描public class WebConfig extends WebMvcConfigurerAdapter {//配置JSP視圖解析器@Beanpublic ViewResolver viewResolver() {InternalResourceViewResolver resolver = new InternalResourceViewResolver();resolver.setPrefix("/WEB-INF/views/");resolver.setSuffix(".jsp");resolver.setExposeContextBeansAsAttributes(true);return resolver;}//配置靜態資源的處理@Overridepublic void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {configurer.enable(); ? ? ? ?//對靜態資源的請求轉發到容器缺省的servlet，而不使用DispatcherServlet}}
HomeController
package com.home.controller;import static org.springframework.web.bind.annotation.RequestMethod.*;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.servlet.ModelAndView;@Controllerpublic class HomeController {@RequestMapping(value = "/home", method=GET)public String home() {return "home";}}
home.jsp:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><title>Spring MVC Tutorial chry</title><style type="text/css"></style></head><body><br><div style='text-align:center;'>index page!</div></body></pre>
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</groupId><artifactId>springMVC-config</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><name>springMVC-config Maven Webapp</name><!-- FIXME change it to the project's website --><url>http://www.example.com</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.7</maven.compiler.source><maven.compiler.target>1.7</maven.compiler.target></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>1.7.12</version></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-core</artifactId><version>1.1.1</version><scope>provided</scope></dependency><!--實現slf4j接口并整合--><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-classic</artifactId><version>1.1.1</version><scope>provided</scope></dependency><!--druid==>阿里巴巴數據庫連接池--><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.25</version></dependency>!--2.dao框架:MyBatis依賴--<dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.3.0</version></dependency><!--mybatis自身實現的spring整合依賴--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.2</version></dependency><!--3.Servlet web相關依賴--><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>1.1.2</version></dependency><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.5.4</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency>!--4:spring依賴--<!--1)spring核心依賴--><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.3.14.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.3.14.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.3.14.RELEASE</version></dependency><!--2)spring dao層依賴--><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>4.3.14.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>4.3.14.RELEASE</version></dependency><!--3)springweb相關依賴--><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>4.3.14.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.3.14.RELEASE</version></dependency><!--4)spring test相關依賴--><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>4.3.14.RELEASE</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.35</version><scope>runtime</scope></dependency><!--Aop要導入的包--><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.9</version></dependency><!-- https://mvnrepository.com/artifact/org.json/json --><dependency><groupId>org.json</groupId><artifactId>json</artifactId><version>20170516</version></dependency><!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf --><dependency><groupId>org.thymeleaf</groupId><artifactId>thymeleaf-spring4</artifactId><version>3.0.9.RELEASE</version></dependency><dependency><groupId>javax.validation</groupId><artifactId>validation-api</artifactId><version>2.0.1.Final</version></dependency><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>18.0</version></dependency><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>18.0</version></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-validator</artifactId><version>5.3.6.Final</version></dependency><!-- jsp --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.0.1</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.1</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- jsp --></dependencies><build><finalName>springMVC-config</finalName><pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --><plugins><plugin><artifactId>maven-clean-plugin</artifactId><version>3.0.0</version></plugin><!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --><plugin><artifactId>maven-resources-plugin</artifactId><version>3.0.2</version></plugin><plugin><artifactId>maven-compiler-plugin</artifactId><version>3.7.0</version></plugin><plugin><artifactId>maven-surefire-plugin</artifactId><version>2.20.1</version></plugin><plugin><artifactId>maven-war-plugin</artifactId><version>3.2.0</version></plugin><plugin><artifactId>maven-install-plugin</artifactId><version>2.5.2</version></plugin><plugin><artifactId>maven-deploy-plugin</artifactId><version>2.8.2</version></plugin></plugins></pluginManagement></build></project>
這個時候訪問相應的路徑就可以看到jsp的相關信息了
