add SpringUtil

CHANGELOG.md

@@ -9,6 +9,7 @@
 * 【core 】     新增WatchServer（issue#440@Github）
 * 【core 】     ReflectUtil.getFieldValue支持static（issue#662@Github）
 * 【core 】     改进Bean判断和注入逻辑：支持public字段注入（issue#I1689L@Gitee）
+* 【extra】     新增SpringUtil
 
 
 ### Bug修复

hutool-extra/pom.xml

@@ -206,5 +206,24 @@
 			<version>3.0.2</version>
 			<optional>true</optional>
 		</dependency>
+		<!-- Spring Boot -->
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+			<version>2.2.2.RELEASE</version>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<version>2.2.2.RELEASE</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>ch.qos.logback</groupId>
+			<artifactId>logback-classic</artifactId>
+			<version>1.2.3</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>

hutool-extra/src/main/java/cn/hutool/extra/spring/SpringUtil.java

@@ -0,0 +1,78 @@
+package cn.hutool.extra.spring;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.stereotype.Component;
+
+/**
+ * Spring(Spring boot)工具封装，包括：
+ *
+ * <pre>
+ *     1、Spring IOC容器中的bean对象获取
+ * </pre>
+ *
+ * @author loolly
+ * @since 5.1.0
+ */
+@Component
+public class SpringUtil implements ApplicationContextAware {
+
+	private static ApplicationContext applicationContext;
+
+	@SuppressWarnings("NullableProblems")
+	@Override
+	public void setApplicationContext(ApplicationContext applicationContext) {
+		if (SpringUtil.applicationContext == null) {
+			SpringUtil.applicationContext = applicationContext;
+		}
+	}
+
+	/**
+	 * 获取applicationContext
+	 *
+	 * @return ApplicationContext
+	 */
+	public static ApplicationContext getApplicationContext() {
+		return applicationContext;
+	}
+
+	//通过name获取 Bean.
+
+	/**
+	 * 通过name获取 Bean
+	 * @param name Bean名称
+	 * @return Bean
+	 */
+	public static <T> T getBean(String name) {
+		//noinspection unchecked
+		return (T) applicationContext.getBean(name);
+	}
+
+	/**
+	 * 通过class获取Bean
+	 *
+	 * @param <T> Bean类型
+	 * @param clazz Bean类
+	 * @return Bean对象
+	 */
+	public static <T> T getBean(Class<T> clazz) {
+		return applicationContext.getBean(clazz);
+	}
+
+	/**
+	 * 通过name,以及Clazz返回指定的Bean
+	 *
+	 * @param <T> bean类型
+	 * @param name Bean名称
+	 * @param clazz bean类型
+	 * @return Bean对象
+	 */
+	public static <T> T getBean(String name, Class<T> clazz) {
+		return applicationContext.getBean(name, clazz);
+	}
+
+}
+
+
+
+

hutool-extra/src/test/java/cn/hutool/extra/spring/SpringUtilTest.java

@@ -0,0 +1,35 @@
+package cn.hutool.extra.spring;
+
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.Bean;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = {SpringUtil.class, SpringUtilTest.Demo2.class})
+public class SpringUtilTest {
+
+	@Test
+	public void getBeanTest(){
+		final Demo2 testDemo = SpringUtil.getBean("testDemo");
+		Assert.assertEquals(12345, testDemo.getId());
+		Assert.assertEquals("test", testDemo.getName());
+	}
+
+	@Data
+	public static class Demo2{
+		private long id;
+		private String name;
+
+		@Bean(name="testDemo")
+		public Demo2 generateDemo() {
+			Demo2 demo = new Demo2();
+			demo.setId(12345);
+			demo.setName("test");
+			return demo;
+		}
+	}
+}