Spring 梳理 - javaConfig在App和webApp中的应用
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package com.dxz.demo.configuration; import org.springframework.context.annotation.Configuration; @Configuration public class TestConfiguration { public TestConfiguration() { System.out.println("TestConfiguration容器启动初始化。。。"); } }
- APP
- 方法1
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package com.dxz.demo.configuration; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class TestMain { public static void main(String[] args) { // @Configuration注解的spring容器加载方式,用AnnotationConfigApplicationContext替换ClassPathXmlApplicationContext ApplicationContext context = new AnnotationConfigApplicationContext(TestConfiguration.class); // 如果加载spring-context.xml文件: // ApplicationContext context = new // ClassPathXmlApplicationContext("spring-context.xml"); } } public static void main(String[] args) { // @Configuration注解的spring容器加载方式,用AnnotationConfigApplicationContext替换ClassPathXmlApplicationContext ApplicationContext context = new AnnotationConfigApplicationContext(TestConfiguration.class); //获取bean TestBean tb = (TestBean) context.getBean("testBean"); tb.sayHello(); }
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- 方法2
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public static void main(String[] args) { ApplicationContext ctx = new AnnotationConfigApplicationContext(); ctx.register(AppContext.class) }
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- 方法1
- webApp
- 方法1
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<web-app> <context-param> <param-name>contextClass</param-name> <param-value> org.springframework.web.context. support.AnnotationConfigWebApplicationContext </param-value> </context-param> <context-param> <param-name>contextConfigLocation</param-name> <param-value> demo.AppContext </param-value> </context-param> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <servlet> <servlet-name>sampleServlet</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <init-param> <param-name>contextClass</param-name> <param-value> org.springframework.web.context. support.AnnotationConfigWebApplicationContext </param-value> </init-param> </servlet> </web-app>
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- 方法2
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package com.jt; import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; public class AppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{ @Override protected Class<?>[] getRootConfigClasses() { return new Class<?>[] { RootConfig.class }; } @Override protected Class<?>[] getServletConfigClasses() { return new Class<?>[] { WebConfig.class }; } @Override protected String[] getServletMappings() { return new String[] { "/" }; } }
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- 方法1