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Spring MVC 零配置实现
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‎pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.chenfeng.xiaolyuh</groupId>
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<artifactId>spring-mvc-student</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>war</packaging>
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<properties>
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<!-- Generic properties -->
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<java.version>1.8</java.version>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<!-- Web -->
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<jsp.version>2.2</jsp.version>
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<jstl.version>1.2</jstl.version>
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<servlet.version>3.1.0</servlet.version>
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<!-- Spring -->
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<spring-framework.version>4.1.5.RELEASE</spring-framework.version>
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<!-- Logging -->
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<logback.version>1.0.13</logback.version>
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<slf4j.version>1.7.5</slf4j.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>javax</groupId>
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<artifactId>javaee-web-api</artifactId>
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<version>7.0</version>
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<scope>provided</scope>
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</dependency>
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<!-- Spring MVC -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-webmvc</artifactId>
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<version>${spring-framework.version}</version>
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</dependency>
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<!-- Spring and Transactions -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-tx</artifactId>
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<version>${spring-framework.version}</version>
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</dependency>
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<!-- 其他web依赖 -->
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>jstl</artifactId>
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<version>${jstl.version}</version>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<version>${servlet.version}</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>javax.servlet.jsp</groupId>
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<artifactId>jsp-api</artifactId>
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<version>${jsp.version}</version>
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<scope>provided</scope>
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</dependency>
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<!-- 使用SLF4J和LogBack作为日志 -->
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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<version>${slf4j.version}</version>
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</dependency>
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<dependency>
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<groupId>log4j</groupId>
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<artifactId>log4j</artifactId>
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<version>1.2.16</version>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>jcl-over-slf4j</artifactId>
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<version>${slf4j.version}</version>
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</dependency>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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<version>${logback.version}</version>
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</dependency>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-core</artifactId>
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<version>${logback.version}</version>
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</dependency>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-access</artifactId>
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<version>${logback.version}</version>
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</dependency>
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<dependency>
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<groupId>org.logback-extensions</groupId>
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<artifactId>logback-ext-spring</artifactId>
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<version>0.1.4</version>
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</dependency>
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<!--对json和xml格式的支持 -->
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<dependency>
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<groupId>com.fasterxml.jackson.dataformat</groupId>
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<artifactId>jackson-dataformat-xml</artifactId>
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<version>2.5.3</version>
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</dependency>
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<!-- file upload -->
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<dependency>
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<groupId>commons-fileupload</groupId>
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<artifactId>commons-fileupload</artifactId>
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<version>1.3.1</version>
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</dependency>
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<!-- 非必需，可简化IO操作 -->
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<dependency>
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<groupId>commons-io</groupId>
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<artifactId>commons-io</artifactId>
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<version>2.3</version>
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</dependency>
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<!-- 测试 -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-test</artifactId>
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<version>${spring-framework.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>2.3.2</version>
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<configuration>
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<source>${java.version}</source>
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<target>${java.version}</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-war-plugin</artifactId>
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<version>2.3</version>
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<configuration>
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<failOnMissingWebXml>false</failOnMissingWebXml>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎src/main/java/com/chenfeng/xiaolyuh/config/MvcConfig.java

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package com.chenfeng.xiaolyuh.config;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.web.servlet.config.annotation.EnableWebMvc;
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import org.springframework.web.servlet.view.InternalResourceViewResolver;
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import org.springframework.web.servlet.view.JstlView;
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/**
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* MVC 配置类。这里我们配置了一个jsp的ViewResolver，用来映射路径和实际页面的位置，
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* 其中@EnableWebMvc注解会开启一些默认的配置，如一些ViewResolver或者MessageConverter
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* @author yuhao.wang
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* @Date 2017年3月29日 下午3:41:20
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*/
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@Configuration
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@EnableWebMvc
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@ComponentScan("com.chenfeng.xiaolyuh")
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public class MvcConfig {
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@Bean
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public InternalResourceViewResolver viewResolver() {
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InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
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viewResolver.setPrefix("/WEB-INF/classes/views/");// 运行时代码会将页面自动编译到/WEB-INF/classes/views/下
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viewResolver.setSuffix(".jsp");
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viewResolver.setViewClass(JstlView.class);
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return viewResolver;
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}
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}

‎src/main/java/com/chenfeng/xiaolyuh/config/WebInitializer.java

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package com.chenfeng.xiaolyuh.config;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRegistration.Dynamic;
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import org.springframework.web.WebApplicationInitializer;
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import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
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import org.springframework.web.servlet.DispatcherServlet;
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import ch.qos.logback.ext.spring.web.LogbackConfigListener;
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/**
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* web配置类。程序的入口
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* WebApplicationInitializer类是Spring提供用来配置Servlet3.0+配置的接口，从而实现了代替web.xml的位置。
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* 实现此接口将会自动被SpringServletContainerInitializer获取到，SpringServletContainerInitializer用来启动Servlet3.0容器。
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* 容器启动时会自动扫描当前服务中ServletContainerInitializer的实现类，并调用其onStartup方法，
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* 其参数Set<Class<?>> c，可通过在实现类上声明注解javax.servlet.annotation.HandlesTypes(xxx.class)注解自动注入，
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* @HandlesTypes会自动扫描项目中所有的xxx.class的实现类，并将其全部注入Set。
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* @author yuhao.wang
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*/
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public class WebInitializer implements WebApplicationInitializer{
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@Override
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public void onStartup(ServletContext servletContext) throws ServletException {
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// 新建一个WebApplicationContext的注册配置类，并和当前的servletContext关联
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AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
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context.register(MvcConfig.class);
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context.setServletContext(servletContext);
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// 注册Spring mvc的DispatchServlet
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Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(context));
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servlet.addMapping("/");
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servlet.setLoadOnStartup(1);
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// 日志配置
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servletContext.setInitParameter("logbackConfigLocation", "classpath:logback.xml");
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servletContext.addListener(LogbackConfigListener.class);
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}
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}

‎src/main/java/com/chenfeng/xiaolyuh/controller/HelloController.java

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package com.chenfeng.xiaolyuh.controller;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.RequestMapping;
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@Controller
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public class HelloController {
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@RequestMapping("index")
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public String hello() {
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return "index";
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}
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}

‎src/main/resources/logback.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<configuration scan="true" scanPeriod="1 seconds">
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<contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
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<resetJUL>true</resetJUL>
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</contextListener>
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<jmxConfigurator />
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<appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
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<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
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<fileNamePattern>E:/workspace/spring-ecosystem-student/spring-mvc-student/logs/log.%d{yyyy-MM-dd}.log</fileNamePattern>
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<maxHistory>30</maxHistory>
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</rollingPolicy>
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<encoder>
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<pattern>%-4relative %d{HH:mm:ss.SSS} - [%thread] %-5level %class - %msg%n</pattern>
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</encoder>
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</appender>
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<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>logbak: %d{HH:mm:ss.SSS} %logger{36} - %msg%n</pattern>
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</encoder>
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</appender>
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<!-- 将org.springframework.web包下的类的日志级别设置为DEBUG，
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我们开发Spring MVC经常出现和参数类型相关的4XX错误，设置此项我们可以看到更相信的信息 -->
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<logger name="org.springframework.web" level="DEBUG" />
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<root level="debug">
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<appender-ref ref="console" />
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<appender-ref ref="file" />
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</root>
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</configuration>

‎src/main/resources/views/index.jsp

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<%@ page language="java" contentType="text/html; charset=UTF-8"
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pageEncoding="UTF-8"%>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Insert title here</title>
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</head>
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<body>
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<pre>
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Welcome to Spring MVC world
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</pre>
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</body>
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</html>

‎src/main/webapp/index.jsp

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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Insert title here</title>
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</head>
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<body>
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Hello World!
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</body>
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</html>

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