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spring实战之javaconfig     所属分类 spring
JavaConfig 在 java 中配置 bean

Spring3.0开始 ,@Configuration用于定义配置类,可替换xml配置文件,
配置类内部包含有一个或多个被@Bean注解的方法, 
AnnotationConfigApplicationContext或AnnotationConfigWebApplicationContext 

配置类引用 其他配置类 或 xml 配置
@Import(TestConfiguration.class)
@ImportResource("classpath:applicationContext-configuration.xml")


Bean1 添加 @Component 
Bean2 在 Config2中定义
Bean3 在 Config3中定义


Bean1.java @Component public class Bean1{ public Bean1(){ System.out.println(this+" create "+new Date()); } }
Config2.java import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class Config2{ @Bean public Bean2 bean2(){ return new Bean2(); } }
Config1.java import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.ComponentScan.Filter; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.FilterType; // @ComponentScan(useDefaultFilters = false,includeFilters = {@Filter(type = FilterType.ANNOTATION, value = Component.class)}) // @ComponentScan(useDefaultFilters = false,includeFilters = {@Filter(type = FilterType.CUSTOM, value = MyTypeFilter.class)}) @ComponentScan(useDefaultFilters = true,excludeFilters = {@Filter(type = FilterType.ANNOTATION, value = Configuration.class)}) @Configuration public class Config1{ }
Hello.java // AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config1.class); AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(); ctx.register(Config1.class); // ctx.register(Config2.class); // ctx.register(Config3.class); ctx.refresh(); Config1 中 使用 @ComponentScan ,才能扫描到 Bean1 Config2 Config3 排除对 Config2 Config3 的扫描 @ComponentScan(useDefaultFilters = true,excludeFilters = {@Filter(type = FilterType.ANNOTATION, value = Configuration.class)}) 完整代码 https://gitee.com/dyyx/hellocode/tree/master/project/springtest/src/main/java/dyyx/javaconfig

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