SpringMVC4 + Mybatis 零配置整理

    在Servlet容器启动会将所有实现ServletContainerInitializer接口的类添加到StandardContext的initializers集合中，然后循环调用onStartup方法。

    Spring的SpringServletContainerInitializer类就实现了ServletContainerInitializer接口，

@HandlesTypes(WebApplicationInitializer.class)
public class SpringServletContainerInitializer implements ServletContainerInitializer {

   @Override
   public void onStartup(Set<Class<?>> webAppInitializerClasses, ServletContext servletContext)
         throws ServletException {

      List<WebApplicationInitializer> initializers = new LinkedList<WebApplicationInitializer>();

      if (webAppInitializerClasses != null) {
         for (Class<?> waiClass : webAppInitializerClasses) {
            // Be defensive: Some servlet containers provide us with invalid classes,
            // no matter what @HandlesTypes says...
            if (!waiClass.isInterface() && !Modifier.isAbstract(waiClass.getModifiers()) &&
                  WebApplicationInitializer.class.isAssignableFrom(waiClass)) {
               try {
                  initializers.add((WebApplicationInitializer) waiClass.newInstance());
               }
               catch (Throwable ex) {
                  throw new ServletException("Failed to instantiate WebApplicationInitializer class", ex);
               }
            }
         }
      }

      if (initializers.isEmpty()) {
         servletContext.log("No Spring WebApplicationInitializer types detected on classpath");
         return;
      }

      servletContext.log(initializers.size() + " Spring WebApplicationInitializers detected on classpath");
      AnnotationAwareOrderComparator.sort(initializers);
      for (WebApplicationInitializer initializer : initializers) {
         initializer.onStartup(servletContext);
      }
   }

}

    该类上@HandlesTypes该注解表示容器会读取@HandlesTypes注解value值。并放入 initializers 对应的集合中，循环调用WebApplicationInitializer类型onStartup方法。进而容器初始化将Listener，Servlet，Filter注册到servet容器中。

    Spring提供扩展了Servlet初始化扩展类，其中AbstractAnnotationConfigDispatcherServletInitializer类为注解配置形式扩展抽象类。所以我们可以继承该类进行定制化配置

WebInitializer AbstractAnnotationConfigDispatcherServletInitializer {

    Class<?>[] () {
        Class[] {ApplicationContextConfig.}}

    Class<?>[] () {
        Class[] {WebMvcConfig.}}

    String[] () {
        String[] {}}

    (ServletContext servletContext) {
        servletContext.setInitParameter()servletContext.addListener(LogbackConfigListener.).registerContextLoaderListener(servletContext)}
}

    SpringMVC容器相关配置

com.alibaba.fastjson.serializer.SerializerFeaturecom.alibaba.fastjson.support.config.FastJsonConfigcom.alibaba.fastjson.support.spring.FastJsonHttpMessageConverterorg.springframework.context.annotation.org.springframework.context.annotation.org.springframework.context.annotation.FilterTypeorg.springframework.http.MediaTypeorg.springframework.http.converter.HttpMessageConverterorg.springframework.stereotype.org.springframework.web.bind.annotation.org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurerorg.springframework.web.servlet.config.annotation.org.springframework.web.servlet.config.annotation.ViewResolverRegistryorg.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapterjava.util.ArrayListjava.util.List(={}=={(=FilterType.={..})})
WebMvcConfig WebMvcConfigurerAdapter {

    (DefaultServletHandlerConfigurer configurer) {
        configurer.enable()}

    (ViewResolverRegistry registry) {
        registry.jsp()}

    (List<HttpMessageConverter<?>> converters) {
        FastJsonHttpMessageConverter fastConverter = FastJsonHttpMessageConverter()FastJsonConfig fastJsonConfig = FastJsonConfig()fastJsonConfig.setSerializerFeatures(SerializerFeature.)List<MediaType> fastMediaTypes = ArrayList<>()fastMediaTypes.add(MediaType.)fastConverter.setFastJsonConfig(fastJsonConfig)fastConverter.setSupportedMediaTypes(fastMediaTypes)converters.add(fastConverter)}

}

    

    数据源配置

com.zaxxer.hikari.HikariConfigcom.zaxxer.hikari.HikariDataSourceorg.springframework.beans.factory.annotation.org.springframework.context.annotation.org.springframework.context.annotation.org.springframework.context.annotation.org.springframework.jdbc.datasource.DataSourceTransactionManagerorg.springframework.transaction.PlatformTransactionManagerorg.springframework.transaction.annotation.javax.sql.DataSource({})
DataSourceConfig {
    
    ()
    String ()
    String ()
    String ()
    String ()
    ()
    ()
    ()
    ()
    ()
    ()
    ()
    ()
    ()
    (=)
    DataSource () {
        HikariConfig config = HikariConfig()config.setDriverClassName()config.setJdbcUrl()config.setUsername()config.setPassword()config.setReadOnly()config.setConnectionTimeout()config.setIdleTimeout()config.setMaxLifetime()config.setMaximumPoolSize()config.setMinimumIdle()config.addDataSourceProperty()config.addDataSourceProperty()config.addDataSourceProperty()config.addDataSourceProperty()HikariDataSource ds = HikariDataSource(config)ds}

    PlatformTransactionManager (DataSource dataSource) {
        DataSourceTransactionManager(dataSource)}
}

    Spring容器相关配置

org.apache.ibatis.annotations.org.apache.ibatis.session.SqlSessionFactoryorg.mybatis.spring.SqlSessionFactoryBeanorg.mybatis.spring.annotation.org.springframework.context.annotation.org.springframework.context.annotation.org.springframework.context.annotation.org.springframework.context.annotation.org.springframework.context.annotation.FilterTypeorg.springframework.context.annotation.org.springframework.core.io.support.PathMatchingResourcePatternResolverorg.springframework.stereotype.org.springframework.web.bind.annotation.javax.sql.DataSource(= { }= {
        (= FilterType.= { ..}) })
({ DataSourceConfig.})
(==.)
ApplicationContextConfig {

    SqlSessionFactory (DataSource dataSource) Exception {
        SqlSessionFactoryBean factory = SqlSessionFactoryBean()factory.setDataSource(dataSource)PathMatchingResourcePatternResolver resolver = PathMatchingResourcePatternResolver()factory.setMapperLocations(resolver.getResources())factory.getObject()}
}