Spring MVC纯注解配置工程简单实例——Hello World 博客分类： 搭建工程 springmvc无web.xml纯注解配置Hello World

JDK：1.8

Tomcat：8.5.x

 

工程目录结构

 

 

pom.xml配置

<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.linzx.test</groupId>
	<artifactId>test-springannotationconfig</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.8</java.version>
		<org.springframework.version>4.3.3.RELEASE</org.springframework.version>
	</properties>

	<dependencies>
		<!-- spring mvc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${org.springframework.version}</version>
		</dependency>

		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>4.0.1</version>
			<scope>provided</scope>
		</dependency>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.7.0</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
			</plugin>

			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-war-plugin</artifactId>
				<version>3.2.2</version>
			</plugin>
		</plugins>
	</build>
</project>

 

web.xml的注解配置类

package com.linzx.test.springweb.config;

import javax.servlet.FilterRegistration.Dynamic;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;

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

/**
 * web.xml
 * 继承AbstractAnnotationConfigDispatcherServletInitializer，会同时创建DispatcherServlet和ContextLoaderListener
 */
public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[] { ApplicationConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[] { WebMvcConfig.class };
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        super.onStartup(servletContext);
        
        Dynamic characterEncoding = servletContext.addFilter("characterEncoding", CharacterEncodingFilter.class);
        characterEncoding.setInitParameter("forceEncoding", "true");
        characterEncoding.setInitParameter("encoding", "UTF-8");
        characterEncoding.addMappingForUrlPatterns(null, true, "/*");
    }
}

 

spring-mvc.xml的注解配置类

package com.linzx.test.springweb.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * Spring-MVC配置，相当于spring-mvc.xml
 */
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.linzx.test.springweb.controller", includeFilters = @Filter(classes = Controller.class), useDefaultFilters = false)
public class WebMvcConfig extends WebMvcConfigurerAdapter {

}

 

application.xml的注解配置类

package com.linzx.test.springweb.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;

/**
 * 业务类配置，相当于application.xml
 */
@Configuration
@ComponentScan(basePackages = { "com.linzx.test.springweb" }, excludeFilters = { @Filter(classes = Controller.class) })
public class ApplicationConfig {

}

 

Controller

package com.linzx.test.springweb.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping("/")
    public String hello() {
        return "Hello World!";
    }
}

 

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