Spring Boot 之配置注解使用

springboot-configuration/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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>springboot</groupId>
+    <artifactId>springboot-configuration</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>springboot-configuration :: 配置 Demo</name>
+
+    <!-- Spring Boot 启动父依赖 -->
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.1.RELEASE</version>
+    </parent>
+
+    <dependencies>
+        <!-- Spring Boot web依赖 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- Junit -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+        </dependency>
+    </dependencies>
+</project>

springboot-configuration/src/main/java/org/spring/springboot/Application.java

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+package org.spring.springboot;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Spring Boot 应用启动类
+ *
+ */
+// Spring Boot 应用的标识
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        // 程序启动入口
+        // 启动嵌入式的 Tomcat 并初始化 Spring 环境及其各 Spring 组件
+        SpringApplication.run(Application.class,args);
+    }
+}

springboot-configuration/src/main/java/org/spring/springboot/config/MessageConfiguration.java

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+package org.spring.springboot.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Created by bysocket on 08/09/2017.
+ */
+@Configuration
+public class MessageConfiguration {
+
+    @Bean
+    public String message() {
+        return "message configuration";
+    }
+}

springboot-configuration/src/test/java/org/spring/springboot/config/MessageConfigurationTest.java

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+package org.spring.springboot.config;
+
+import org.junit.Test;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Spring Boot MessageConfiguration 测试 - {@link MessageConfiguration}
+ *
+ */
+public class MessageConfigurationTest {
+
+    @Test
+    public void testGetMessageBean() throws Exception {
+        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(MessageConfiguration.class);
+        assertEquals("message configuration", ctx.getBean("message"));
+    }
+
+    @Test
+    public void testScanPackages() throws Exception {
+        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+        ctx.scan("org.spring.springboot");
+        ctx.refresh();
+        assertEquals("message configuration", ctx.getBean("message"));
+    }
+}