Spring MVC 的 Java Config ( 非 XML ) 配置方式

索引：

目录索引

参看代码 GitHub：

solution/pom.xml

web/pom.xml

web.xml

WebInitializer.java

WebConfig.java

RootConfig.java

一、引入必要类库

　　spring-context

　　spring-context-support

　　spring-webmvc：引入该包后，maven 会自动解析依赖，引入 spring-web 等包。

　　1.solution/pom.xml

 <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>lm.solution</groupId>
     <artifactId>solution</artifactId>
     <version>1.0-SNAPSHOT</version>
     <modules>
         <module>webapi</module>
         <module>web</module>
         <module>common</module>
         <module>service</module>
         <module>mapper</module>
         <module>pojo</module>
         <module>console</module>
         <module>webservice</module>
     </modules>
     <packaging>pom</packaging>

     <name>solution</name>
     <url>http://maven.apache.org</url>

     <properties>
         <!--编译字符集-->
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <!-- spring -->
         <spring.version>4.3.13.RELEASE</spring.version>
         <!-- log4j -->
         <slf4j.version>1.7.7</slf4j.version>
         <log4j.version>1.2.17</log4j.version>
         <!-- jackson -->
         <jackson.version>2.9.4</jackson.version>
         <!-- junit -->
         <junit.version>4.12</junit.version>
         <!-- aspectj -->
         <aspectj.version>1.8.13</aspectj.version>
         <!-- cglib -->
         <cglib.version>3.1</cglib.version>
         <!-- mybatis -->
         <mybatis.version>3.4.5</mybatis.version>
         <!-- mybatis-spring -->
         <mybatisSpring.version>1.3.1</mybatisSpring.version>
         <!--mysql-connector-->
         <mysql.version>5.1.34</mysql.version>
         <!--druid-->
         <druid.version>1.0.5</druid.version>
         <!--javax.servlet-->
         <javaxServlet.version>3.0.1</javaxServlet.version>
         <!--jsp-api-->
         <jspApi.version>2.2</jspApi.version>
         <!--jstl-->
         <jstl.version>1.2</jstl.version>
         <!--json-lib-->
         <jsonLib.version>2.1</jsonLib.version>
         <!--jackson old-->
         <jacksonOld.version>1.9.13</jacksonOld.version>
         <!--dom4j-->
         <dom4j.version>1.6.1</dom4j.version>
         <!--ehcache core-->
         <ehcacheCore.version>2.6.9</ehcacheCore.version>
         <!--ehcache web-->
         <ehcacheWeb.version>2.0.4</ehcacheWeb.version>
         <!--commons-fileupload-->
         <commonsFileupload.version>1.3.1</commonsFileupload.version>
         <!--commons-io-->
         <commonsIo.version>2.4</commonsIo.version>
         <!--commons-codec-->
         <commonsCodec.version>1.9</commonsCodec.version>
         <!--commons-collections4-->
         <commonsCollections4.version>4.0</commonsCollections4.version>
         <!--commons-beanutils-->
         <commonsBeanutils.version>1.7.0</commonsBeanutils.version>
         <!--freemarker-->
         <freemarker.version>2.3.19</freemarker.version>
         <!-- poi  poi-ooxml -->
         <poi.version>3.9</poi.version>
         <!--org.apache.httpcomponents-->
         <httpcore.version>4.4.8</httpcore.version>
         <httpclient.version>4.5.4</httpclient.version>
         <!-- jaxws-rt -->
         <jaxwsRt.version>2.3.0</jaxwsRt.version>
         <!-- jedis -->
         <jedis.version>2.9.0</jedis.version>
         <!-- rabbitmq -->
         <amqpClient.version>5.1.2</amqpClient.version>
         <!--fastjson-->
         <fastjson.version>1.2.46</fastjson.version>
         <!-- jsr250 -->
         <jsr250.version>1.0</jsr250.version>
     </properties>

     <dependencies>
         <!--单元测试依赖 -->
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <version>RELEASE</version>
             <!--test 说明这个包的存活是在test周期，也就是发布时将不包含这个jar包-->
             <scope>test</scope>
         </dependency>
         <!--spring单元测试依赖 -->
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
             <version>${spring.version}</version>
             <scope>test</scope>
         </dependency>
         <!-- spring -->
         <dependency>
             <groupId>org.springframework</groupId>
             <!-- 因依赖 会自动引入 spring-aop spring-beans spring-core spring-expression 四个包 -->
             <artifactId>spring-context</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context-support</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-aspects</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-tx</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-jdbc</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <!-- aspectj AOP -->
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjrt</artifactId>
             <version>${aspectj.version}</version>
         </dependency>
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjweaver</artifactId>
             <version>${aspectj.version}</version>
         </dependency>
         <!-- 映入JSON jackson -->
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
             <version>${jackson.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-core</artifactId>
             <version>${jackson.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-xml</artifactId>
             <version>${jackson.version}</version>
         </dependency>
         <!-- 日志文件管理包 -->
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
             <version>${log4j.version}</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
             <version>${slf4j.version}</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-log4j12</artifactId>
             <version>${slf4j.version}</version>
         </dependency>
     </dependencies>

     <dependencyManagement>
         <dependencies>
             <!--spring web-->
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-web</artifactId>
                 <version>${spring.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-webmvc</artifactId>
                 <version>${spring.version}</version>
             </dependency>
             <!--cglib-->
             <dependency>
                 <groupId>cglib</groupId>
                 <artifactId>cglib</artifactId>
                 <version>${cglib.version}</version>
             </dependency>
             <!-- mybatis -->
             <dependency>
                 <groupId>org.mybatis</groupId>
                 <artifactId>mybatis</artifactId>
                 <version>${mybatis.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.mybatis</groupId>
                 <artifactId>mybatis-spring</artifactId>
                 <version>${mybatisSpring.version}</version>
             </dependency>
             <!-- Mysql数据库驱动包 -->
             <dependency>
                 <groupId>mysql</groupId>
                 <artifactId>mysql-connector-java</artifactId>
                 <version>${mysql.version}</version>
             </dependency>
             <!-- connection pool -->
             <dependency>
                 <groupId>com.alibaba</groupId>
                 <artifactId>druid</artifactId>
                 <version>${druid.version}</version>
                 <!--<scope>runtime</scope>-->
             </dependency>
             <!--servlet-->
             <dependency>
                 <groupId>javax.servlet</groupId>
                 <artifactId>javax.servlet-api</artifactId>
                 <version>${javaxServlet.version}</version>
                 <scope>provided</scope>
             </dependency>
             <dependency>
                 <groupId>javax.servlet.jsp</groupId>
                 <artifactId>jsp-api</artifactId>
                 <version>${jspApi.version}</version>
                 <scope>provided</scope>
             </dependency>
             <dependency>
                 <groupId>javax.servlet</groupId>
                 <artifactId>jstl</artifactId>
                 <version>${jstl.version}</version>
             </dependency>
             <!-- 映入JSON lib -->
             <dependency>
                 <groupId>net.sf.json-lib</groupId>
                 <artifactId>json-lib</artifactId>
                 <version>${jsonLib.version}</version>
                 <classifier>jdk15</classifier>
             </dependency>
             <!-- jackson old -->
             <dependency>
                 <groupId>org.codehaus.jackson</groupId>
                 <artifactId>jackson-core-asl</artifactId>
                 <version>${jacksonOld.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.codehaus.jackson</groupId>
                 <artifactId>jackson-mapper-asl</artifactId>
                 <version>${jacksonOld.version}</version>
             </dependency>
             <!-- 用dom4j解析xml文件 -->
             <dependency>
                 <groupId>dom4j</groupId>
                 <artifactId>dom4j</artifactId>
                 <version>${dom4j.version}</version>
             </dependency>
             <!-- ehcache -->
             <dependency>
                 <groupId>net.sf.ehcache</groupId>
                 <artifactId>ehcache-core</artifactId>
                 <version>${ehcacheCore.version}</version>
             </dependency>
             <dependency>
                 <groupId>net.sf.ehcache</groupId>
                 <artifactId>ehcache-web</artifactId>
                 <version>${ehcacheWeb.version}</version>
             </dependency>
             <!-- 上传组件包 -->
             <dependency>
                 <groupId>commons-fileupload</groupId>
                 <artifactId>commons-fileupload</artifactId>
                 <version>${commonsFileupload.version}</version>
             </dependency>
             <dependency>
                 <groupId>commons-io</groupId>
                 <artifactId>commons-io</artifactId>
                 <version>${commonsIo.version}</version>
             </dependency>
             <dependency>
                 <groupId>commons-codec</groupId>
                 <artifactId>commons-codec</artifactId>
                 <version>${commonsCodec.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.commons</groupId>
                 <artifactId>commons-collections4</artifactId>
                 <version>${commonsCollections4.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.commons</groupId>
                 <artifactId>commons-lang3</artifactId>
                 <version>3.3.2</version>
             </dependency>
             <!-- commons-beanutils -->
             <dependency>
                 <groupId>commons-beanutils</groupId>
                 <artifactId>commons-beanutils</artifactId>
                 <version>${commonsBeanutils.version}</version>
                 <exclusions>
                     <exclusion>
                         <groupId>commons-logging</groupId>
                         <artifactId>commons-logging</artifactId>
                     </exclusion>
                 </exclusions>
             </dependency>
             <!-- freemarker -->
             <dependency>
                 <groupId>org.freemarker</groupId>
                 <artifactId>freemarker</artifactId>
                 <version>${freemarker.version}</version>
             </dependency>
             <!-- poi -->
             <dependency>
                 <groupId>org.apache.poi</groupId>
                 <artifactId>poi</artifactId>
                 <version>${poi.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.poi</groupId>
                 <artifactId>poi-ooxml</artifactId>
                 <version>${poi.version}</version>
             </dependency>
             <!-- org.apache.httpcomponents -->
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpcore</artifactId>
                 <version>${httpcore.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpclient</artifactId>
                 <version>${httpclient.version}</version>
             </dependency>
             <!-- com.sun.xml.ws/jaxws-rt -->
             <dependency>
                 <groupId>com.sun.xml.ws</groupId>
                 <artifactId>jaxws-rt</artifactId>
                 <version>${jaxwsRt.version}</version>
             </dependency>
             <!-- redis.clients/jedis -->
             <dependency>
                 <groupId>redis.clients</groupId>
                 <artifactId>jedis</artifactId>
                 <version>${jedis.version}</version>
             </dependency>
             <!-- com.rabbitmq/amqp-client -->
             <dependency>
                 <groupId>com.rabbitmq</groupId>
                 <artifactId>amqp-client</artifactId>
                 <version>${amqpClient.version}</version>
             </dependency>
             <!-- com.alibaba/fastjson -->
             <dependency>
                 <groupId>com.alibaba</groupId>
                 <artifactId>fastjson</artifactId>
                 <version>${fastjson.version}</version>
             </dependency>
             <!-- javax.annotation/jsr250-api -->
             <dependency>
                 <groupId>javax.annotation</groupId>
                 <artifactId>jsr250-api</artifactId>
                 <version>${jsr250.version}</version>
             </dependency>
         </dependencies>
     </dependencyManagement>

     <build>
         <plugins>
             <!-- java编译插件 -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.2</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
                     <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>
         </plugins>

         <pluginManagement>
             <plugins>
                 <!-- 配置Tomcat插件 -->
                 <plugin>
                     <groupId>org.apache.tomcat.maven</groupId>
                     <artifactId>tomcat8-maven-plugin</artifactId>
                     <version>3.0-r1756463</version>
                 </plugin>
             </plugins>
         </pluginManagement>
     </build>

 </project>

　　2.web/pom.xml

 <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/maven-v4_0_0.xsd">
     <parent>
         <artifactId>solution</artifactId>
         <groupId>lm.solution</groupId>
         <version>1.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <groupId>lm.solution</groupId>
     <artifactId>web</artifactId>
     <packaging>war</packaging>
     <version>1.0-SNAPSHOT</version>
     <name>web Maven Webapp</name>
     <url>http://maven.apache.org</url>
     <dependencies>
         <!--Module-->
         <dependency>
             <groupId>lm.solution</groupId>
             <artifactId>service</artifactId>
             <version>1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>lm.solution</groupId>
             <artifactId>common</artifactId>
             <version>1.0-SNAPSHOT</version>
         </dependency>

         <!--Libary-->
         <!--spring mvc-->
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
         </dependency>
         <!--cglib-->
         <dependency>
             <groupId>cglib</groupId>
             <artifactId>cglib</artifactId>
         </dependency>
         <!-- mybatis核心包 -->
         <dependency>
             <groupId>org.mybatis</groupId>
             <artifactId>mybatis</artifactId>
         </dependency>
         <!--mybatis spring 插件 -->
         <dependency>
             <groupId>org.mybatis</groupId>
             <artifactId>mybatis-spring</artifactId>
         </dependency>
         <!-- Mysql数据库驱动包 -->
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
         </dependency>
         <!-- connection pool -->
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>druid</artifactId>
             <!--<scope>runtime</scope>-->
         </dependency>
         <!--servlet-->
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>javax.servlet.jsp</groupId>
             <artifactId>jsp-api</artifactId>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>jstl</artifactId>
         </dependency>
         <!-- 映入JSON lib -->
         <dependency>
             <groupId>net.sf.json-lib</groupId>
             <artifactId>json-lib</artifactId>
             <classifier>jdk15</classifier>
         </dependency>
         <!-- 用dom4j解析xml文件 -->
         <dependency>
             <groupId>dom4j</groupId>
             <artifactId>dom4j</artifactId>
         </dependency>
         <!-- ehcache -->
         <dependency>
             <groupId>net.sf.ehcache</groupId>
             <artifactId>ehcache-core</artifactId>
         </dependency>
         <dependency>
             <groupId>net.sf.ehcache</groupId>
             <artifactId>ehcache-web</artifactId>
         </dependency>
         <!-- 上传组件包 -->
         <dependency>
             <groupId>commons-fileupload</groupId>
             <artifactId>commons-fileupload</artifactId>
         </dependency>
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
         </dependency>
         <!-- common others -->
         <dependency>
             <groupId>commons-codec</groupId>
             <artifactId>commons-codec</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
         </dependency>
         <!-- commons-beanutils -->
         <dependency>
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>
             <exclusions>
                 <exclusion>
                     <groupId>commons-logging</groupId>
                     <artifactId>commons-logging</artifactId>
                 </exclusion>
             </exclusions>
         </dependency>
         <!-- freemarker -->
         <dependency>
             <groupId>org.freemarker</groupId>
             <artifactId>freemarker</artifactId>
         </dependency>
         <!-- org.apache.httpcomponents -->
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpcore</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
         </dependency>
         <!-- redis.clients/jedis -->
         <dependency>
             <groupId>redis.clients</groupId>
             <artifactId>jedis</artifactId>
         </dependency>
         <!-- com.rabbitmq/amqp-client -->
         <dependency>
             <groupId>com.rabbitmq</groupId>
             <artifactId>amqp-client</artifactId>
         </dependency>
         <!-- com.alibaba/fastjson -->
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
         </dependency>
     </dependencies>
     <build>
         <finalName>web</finalName>

         <plugins>
             <plugin>
                 <groupId>org.apache.tomcat.maven</groupId>
                 <artifactId>tomcat8-maven-plugin</artifactId>
             </plugin>
         </plugins>
     </build>
 </project>

二、web 配置

　　在 java config 配置方式中，我们就不需要在 web.xml 中配置监听及servlet 等节点了，这里我们仍然使用 servlet 3.0 API 。

　　1.web.xml

 <!DOCTYPE web-app PUBLIC
         "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
         "http://java.sun.com/dtd/web-app_2_3.dtd" >

 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns="http://java.sun.com/xml/ns/javaee"
          xsi:schemaLocation="
             http://java.sun.com/xml/ns/javaee
             http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
          id="WebApp_ID"
          version="3.0">
 </web-app>

三、用 JavaConfig 替代 web.xml 中 servlet 配置及监听配置

　　public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer：　　

　　　　WebInitializer继承关系链：

　　　　WebInitializer -->AbstractAnnotationConfigDispatcherServletInitializer -->AbstractDispatcherServletInitializer -->

　　　　AbstractContextLoaderInitializer -->WebApplicationInitializer

　　　　实现 WebApplicationInitializer 接口，就等同于 web.xml 配置

　　　　@Override public void onStartup ：

　　　　　　web.xml 核心的相关配置，可再此方法中重写 自定义的配置 ，如：<filter> 可用 FilterRegistration.Dynamic encodingFilter 此种方式来配置。

　　　　@Override protected Class<?>[] getRootConfigClasses ：

　　　　　　重写此方法，以替代 spring-context.xml ,在这个方法中返回的 类类型数组 可配置上下文中需要的 bean ，如数据库，缓存 等等。

　　　　@Override protected Class<?>[] getServletConfigClasses：

　　　　　　重写此方法，以替代 spring-mvc.xml ，在这个方法中返回的类型数组 可配置 spring 中 视图解析器，http message converter 等框架需要的 bean。

　　　　@Override protected String[] getServletMappings ：　　　　　　

　　　　　　重写此方法，就相当于 <servlet-mapping> 节点等同的功能，可指定 站点根路径。

　　public class WebConfig extends WebMvcConfigurerAdapter ：

　　　　@EnableWebMvc：注解会开启一些默认配置，如：ViewResolver MessageConverter 等,若无此注解，重写 WebMvcConfigurerAdapter 方法无效。

　　　　@ComponentScan：会扫描指定包中的类，根据注解，将特定类初始化为 上下文中需要的 bean 。

　　　　@Override public void addViewControllers ：

　　　　　　重写 addViewControllers 简化页面快捷转向，这样就可以不用配置 Controller 了（就是那些仅返回一个页面路径的简单 controller ）。

　　　　@Bean public InternalResourceViewResolver viewResolver ：

　　　　　　配置JSP视图解析器

　　　　@Bean public MultipartResolver multipartResolver ：

　　　　　　配置springMVC处理上传文件的信息

　　　　@Override public void addResourceHandlers ：

　　　　　　配置静态文件处理

　　1.WebInitializer.java

 package lm.solution.web.config;

 import lm.solution.web.config.configs.RootConfig;
 import lm.solution.web.config.configs.WebConfig;
 import org.springframework.web.filter.CharacterEncodingFilter;
 import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

 import javax.servlet.*;

 /**
  * WebInitializer继承关系链：
  * WebInitializer -->
  * AbstractAnnotationConfigDispatcherServletInitializer  -->
  * AbstractDispatcherServletInitializer  -->
  * AbstractContextLoaderInitializer  -->
  * WebApplicationInitializer
  * 实现 WebApplicationInitializer 接口，就等同于 web.xml 配置
  * */
 public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

     @Override
     public void onStartup(ServletContext servletContext)
             throws ServletException{

         /**
          * super 中已设置 servlet.setLoadOnStartup(1)
          * */
         super.onStartup(servletContext);

         //
         ServletRegistration servletRegistration =servletContext.getServletRegistration("dispatcher");

         // spring 字符过滤
         FilterRegistration.Dynamic encodingFilter=servletContext.addFilter("encoding-filter",CharacterEncodingFilter.class);
         encodingFilter.setInitParameter("encoding","UTF-8");
         encodingFilter.setInitParameter("forceEncoding","true");
         encodingFilter.setAsyncSupported(true);
         encodingFilter.addMappingForUrlPatterns(null,true,"/*");

     }

     // root配置类初始化
     // 指定 Root WebApplicationContext 类，这个类必须@Configuration来注解，从而代替XML配置文件
     @Override
     protected Class<?>[] getRootConfigClasses() {

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

     }

     // web配置类初始化
     // 指定 Servlet WebApplicationContext 类，这个类必须@Configuration来注解，从而代替XML配置文件
     @Override
     protected Class<?>[] getServletConfigClasses() {

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

     }

     // 映射根路径初始化
     // 指定 Servlet mappings
     @Override
     protected String[] getServletMappings() {

         return new String[]{"/"};

     }

     @Override
     protected Filter[] getServletFilters() {

         return null;

     }

     @Override
     protected void customizeRegistration(ServletRegistration.Dynamic registration){

         // 让404作为异常抛出 不使用tomcat默认的
         registration.setInitParameter("throwExceptionIfNoHandlerFound","true");

     }

 }

　　2.WebConfig.java

 package lm.solution.web.config.configs;

 import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
 import lm.solution.common.web.messageconverter.CustomMessageConverter;
 import lm.solution.web.config.beans.TimerInterceptor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.web.multipart.MultipartResolver;
 import org.springframework.web.multipart.commons.CommonsMultipartResolver;
 import org.springframework.web.servlet.config.annotation.*;
 import org.springframework.web.servlet.view.InternalResourceViewResolver;
 import org.springframework.web.servlet.view.JstlView;

 import java.util.ArrayList;
 import java.util.List;

 @Configuration
 /**
  * @EnableWebMvc 注解会开启一些默认配置，如：ViewResolver MessageConverter 等,
  * 若无此注解，重写 WebMvcConfigurerAdapter 方法无效
  * */
 @EnableWebMvc
 @ComponentScan(value = {
         "lm.solution.web",
         "lm.solution.service.mysql",
         "lm.solution.service.webtest"
 })
 /**
  * 继承 WebMvcConfigurerAdapter 类，重写其方法可对 spring mvc 进行配置
  * */
 public class WebConfig extends WebMvcConfigurerAdapter {

     // 重写 addViewControllers 简化页面快捷转向，这样就可以不用配置 Controller 了
     @Override
     public void addViewControllers(ViewControllerRegistry registry) {

         registry.addViewController("/").setViewName("index");
         registry.addViewController("/error").setViewName("error/error");
         registry.addViewController("/excel").setViewName("excel/excel");
         // 文件上传下载
         registry.addViewController("/upload").setViewName("fileupload/upload");
         registry.addViewController("/ImageValidateCodeLogin").setViewName("login/imageValidateCodeLogin");
         registry.addViewController("/restfulapi").setViewName("restful/user");
         registry.addViewController("/jaxwsri").setViewName("jaxwsri/wsri");
         registry.addViewController("/redis").setViewName("redis/jedis");
         registry.addViewController("/mybatisPage").setViewName("db/mybatis");
         registry.addViewController("/messageconverter").setViewName("httpmessageconverter/customconverter");
         registry.addViewController("/sse").setViewName("serverpushmessage/sse");

     }

     // 配置JSP视图解析器
     @Bean
     public InternalResourceViewResolver viewResolver() {
         InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
         /**
          * views 在 /resources/ 下
          * */
         // 前缀
         viewResolver.setPrefix("/WEB-INF/classes/views/");
         // 后缀
         viewResolver.setSuffix(".jsp");
         viewResolver.setViewClass(JstlView.class);
         viewResolver.setContentType("text/html");
         // 可以在JSP页面中通过${}访问beans
         viewResolver.setExposeContextBeansAsAttributes(true);
         return viewResolver;
     }

     // 配置springMVC处理上传文件的信息
     @Bean
     public MultipartResolver multipartResolver() {
         CommonsMultipartResolver resolver = new CommonsMultipartResolver();
         resolver.setDefaultEncoding("UTF-8");
         resolver.setMaxUploadSize(10485760000L);
         resolver.setMaxInMemorySize(40960);
         return resolver;
     }

     // 配置静态文件处理
     @Override
     public void addResourceHandlers(ResourceHandlerRegistry registry){

         /**
          * addResourceHandler 指的是对外暴露的访问路径
          * addResourceLocations 指的是文件放置的目录
          * */
         registry.addResourceHandler("/assets/**")
                 .addResourceLocations("classpath:/assets/");

         // href 链接方式 下载文件
         registry.addResourceHandler("/files/**")
                 .addResourceLocations("classpath:/files/");

         /**
          * 解决 No handler found for GET /favicon.ico 异常
          * */
         registry.addResourceHandler("/favicon.ico")
                 .addResourceLocations("classpath:/favicon.ico");

     }

     // 重写 configurePathMatch ，改变路径参数匹配
     @Override
     public void configurePathMatch(PathMatchConfigurer configurer) {

         /**
          * Spring mvc 默认 如果路径参数后面带点，如 “/mm/nn/xx.yy” 后面的yy值将被忽略
          * 加入下面的配置，就不会忽略“.”后面的参数了
          * */
         configurer.setUseSuffixPatternMatch(false);

     }

 //
 //    // 负责读取二进制格式的数据和写出二进制格式的数据；
 //    @Bean
 //    public ByteArrayHttpMessageConverter byteArrayHttpMessageConverter() {
 //
 //        return new ByteArrayHttpMessageConverter();
 //
 //    }
 //
 //    // 负责读取字符串格式的数据和写出字符串格式的数据；
 //    @Bean
 //    public StringHttpMessageConverter stringHttpMessageConverter() {
 //
 //        StringHttpMessageConverter messageConverter = new StringHttpMessageConverter();
 //        messageConverter.setDefaultCharset(Charset.forName("UTF-8"));
 //        return messageConverter;
 //
 //    }
 //
 //    // 负责读取资源文件和写出资源文件数据；
 //    @Bean
 //    public ResourceHttpMessageConverter resourceHttpMessageConverter() {
 //
 //        return new ResourceHttpMessageConverter();
 //
 //    }
 //
 //    /**
 //     * 负责读取form提交的数据
 //     * 能读取的数据格式为 application/x-www-form-urlencoded，
 //     * 不能读取multipart/form-data格式数据；
 //     * 负责写入application/x-www-from-urlencoded和multipart/form-data格式的数据；
 //     */
 //    @Bean
 //    public FormHttpMessageConverter formHttpMessageConverter() {
 //
 //        return new FormHttpMessageConverter();
 //
 //    }
 //
 //    // 负责读取和写入json格式的数据；
 //    /**
 //     * 配置 fastjson 中实现 HttpMessageConverter 接口的转换器
 //     * FastJsonHttpMessageConverter 是 fastjson 中实现了 HttpMessageConverter 接口的类
 //     */
 //    @Bean(name = "fastJsonHttpMessageConverter")
 //    public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
 //        //
 //        String txtHtml = "text/html;charset=UTF-8";
 //        String txtJson = "text/json;charset=UTF-8";
 //        String appJson = "application/json;charset=UTF-8";
 //
 //        // 这里顺序不能反，一定先写 text/html,不然 IE 下会出现下载提示
 //        List<MediaType> mediaTypes = new ArrayList<>();
 //        mediaTypes.add(MediaType.parseMediaType(txtHtml));
 //        mediaTypes.add(MediaType.parseMediaType(txtJson));
 //        mediaTypes.add(MediaType.parseMediaType(appJson));
 //
 //        // 加入支持的媒体类型，返回 contentType
 //        FastJsonHttpMessageConverter fastjson = new FastJsonHttpMessageConverter();
 //        fastjson.setSupportedMediaTypes(mediaTypes);
 //        return fastjson;
 //
 //    }
 //
 //    // 负责读取和写入 xml 中javax.xml.transform.Source定义的数据；
 //    @Bean
 //    public SourceHttpMessageConverter sourceHttpMessageConverter() {
 //
 //        return new SourceHttpMessageConverter();
 //
 //    }
 //
 //    // 负责读取和写入xml 标签格式的数据；
 //    @Bean
 //    public Jaxb2RootElementHttpMessageConverter jaxb2RootElementHttpMessageConverter() {
 //
 //        return new Jaxb2RootElementHttpMessageConverter();
 //
 //    }
 //
 //    // 注册消息转换器
 //    /**
 //     * 重写 configureMessageConverters 会覆盖掉 spring mvc 默认注册的多个 HttpMessageConverter
 //     * 所以 推荐使用 extendMessageConverter
 //     * */
 //    /**
 //     * Error:
 //     * 400：（错误请求） 服务器不理解请求的语法。
 //     * 415：（不支持的媒体类型） 请求的格式不受请求页面的支持。
 //     */
 //    @Override
 //    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
 //
 //        converters.add(this.byteArrayHttpMessageConverter());
 //        converters.add(this.stringHttpMessageConverter());
 //        converters.add(this.resourceHttpMessageConverter());
 //        converters.add(this.formHttpMessageConverter());
 //        converters.add(this.fastJsonHttpMessageConverter());
 //        converters.add(this.sourceHttpMessageConverter());
 //        converters.add(this.jaxb2RootElementHttpMessageConverter());
 //
 //    }

     // 自定义 HttpMessageConverter
     @Bean
     public CustomMessageConverter customMessageConverter(){

         return new CustomMessageConverter();

     }

     // 负责读取和写入json格式的数据；
     /**
      * 配置 fastjson 中实现 HttpMessageConverter 接口的转换器
      * FastJsonHttpMessageConverter 是 fastjson 中实现了 HttpMessageConverter 接口的类
      */
     @Bean(name = "fastJsonHttpMessageConverter")
     public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
         //
         String txtHtml = "text/html;charset=UTF-8";
         String txtJson = "text/json;charset=UTF-8";
         String appJson = "application/json;charset=UTF-8";

         // 这里顺序不能反，一定先写 text/html,不然 IE 下会出现下载提示
         List<MediaType> mediaTypes = new ArrayList<>();
         mediaTypes.add(MediaType.parseMediaType(txtHtml));
         mediaTypes.add(MediaType.parseMediaType(txtJson));
         mediaTypes.add(MediaType.parseMediaType(appJson));

         // 加入支持的媒体类型，返回 contentType
         FastJsonHttpMessageConverter fastjson = new FastJsonHttpMessageConverter();
         fastjson.setSupportedMediaTypes(mediaTypes);
         return fastjson;

     }

     /**
      * 重写 extendMessageConverters 方法，仅添加自定义 HttpMessageConverter
      * 不覆盖默认注册的 HttpMessageConverter
      * */
     @Override
     public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {

         converters.add(customMessageConverter());
         converters.add(fastJsonHttpMessageConverter());

     }

     // 拦截器 bean
     @Bean
     public TimerInterceptor timerInterceptor(){

         return new TimerInterceptor();

     }

     // 重写 addInterceptors 注册拦截器
     @Override
     public void addInterceptors(InterceptorRegistry registry) {

         registry.addInterceptor(timerInterceptor());

     }

 }

　　3.RootConfig.java

 package lm.solution.web.config.configs;

 import lm.solution.web.config.beans.MySqlBean;
 import lm.solution.web.config.beans.RedisBean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import lm.solution.web.config.beans.HandlerBean;

 @Configuration
 @Import({
         RedisBean.class,
         MySqlBean.class,
         HandlerBean.class
 })
 public class RootConfig {
     /**
      * 此处管理 Beans
      * */
 }

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　蒙

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　2018-05-20 23:46 周日