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規範和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建立一個Maven的WEB工程. pom.xml檔案如下:

不用web.xml,而使用java類配置SpringMVC不用web.xml,而使用java類配置SpringMVC

image

OcrWebAppInitializer:

package com.home.config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;


public class OcrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {



 @Override

 protected Class<?>[] getRootConfigClasses() {

 return new Class<?>[] { RootConfig.class };

 }



 @Override

 protected Class<?>[] getServletConfigClasses() {

 return new Class<?>[] { WebConfig.class };        //ָ指定Web配置類

 }



 @Override

 protected String[] getServletMappings() {    //将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")            //啟動元件掃描

public class WebConfig extends WebMvcConfigurerAdapter {



 //配置JSP視圖解析器

 @Bean

 public ViewResolver viewResolver() {

 InternalResourceViewResolver resolver = new InternalResourceViewResolver();

 resolver.setPrefix("/WEB-INF/views/");

 resolver.setSuffix(".jsp");

 resolver.setExposeContextBeansAsAttributes(true);

 return resolver;

 }



 //配置靜态資源的處理

 @Override

 public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {

 configurer.enable();        //對靜态資源的請求轉發到容器預設的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;



@Controller

public 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>

 <!--實作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==>阿裡巴巴資料庫連接配接池-->

 <dependency>

 <groupId>com.alibaba</groupId>

 <artifactId>druid</artifactId>

 <version>1.0.25</version>

 </dependency>

 !--2.dao架構:MyBatis依賴--

 <dependency>

 <groupId>org.mybatis</groupId>

 <artifactId>mybatis</artifactId>

 <version>3.3.0</version>

 </dependency>

 <!--mybatis自身實作的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>

這個時候通路相應的路徑就可以看到jsp的相關資訊了

不用web.xml,而使用java類配置SpringMVC不用web.xml,而使用java類配置SpringMVC

不用web.xml,而使用java類配置SpringMVC

繼續閱讀

nginx location中斜線的位置的重要性

Apache2.4.x 配置檔案詳解Apache配置需要了解如下：開始講解：

配置apache支援PHP（win7）

27 Best Free Eclipse Plug-ins for Java Developer to be ProductiveCode Quality PluginsText Editor PluginsDependency ManagementVersion Control Integration PluginsFramework Development Continuous Integration Related PluginsOther Utility Plugins

Java String.format方法的簡單使用

neo4j之cypher使用文檔

GitHub連夜封殺！這份阿裡 10W 字内部 Java 字面試手冊到底有多強？

spark/scala關于【資源檔案】加載方法概述外部檔案加載方案測試資源檔案打包入jar包中小結

mybatis_入門程式Mybatis入門

AOP程式設計_Android優雅權限架構(1)概念基礎，2021金三銀四前言正文大綱正文

Effective Java 8:通用程式設計

OOM三種類型

工廠模式-三種類型

【遞歸】高效率求2的n次幂

win10本地scala和spark安裝安裝scala安裝spark

scala (3) Function 和 Method