2.1注解实现spring的Helloworld
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[1]创建maven项目,添加依赖:
1 <dependency> 2 <groupId>org.springframework</groupId> 3 <artifactId>spring-context</artifactId> 4 <version>5.1.3.RELEASE</version> 5 </dependency>
[2]准备两个DAO接口和实现类:
接口:
1 /** 2 * @author 戴着假发的程序员 3 * 4 * @description 5 */ 6 public interface IAutorDAO { 7 public String get(); 8 } 9 /** 10 * @author 戴着假发的程序员 11 * 12 * @description 13 */ 14 public interface IArticleDAO { 15 public int save(String title); 16 }
实现类:
1 /** 2 * @author 戴着假发的程序员 3 * 4 * @description 5 */ 6 public class ArticleDAO implements IArticleDAO { 7 @Override 8 public int save(String title) { 9 System.out.println("ArticleDAO-save->保存文章:"+title); 10 return 1; 11 } 12 } 13 /** 14 * @author 戴着假发的程序员 15 * 16 * @description 17 */ 18 public class AuthorDAO implements IAutorDAO { 19 @Override 20 public String get() { 21 return "戴着假发的程序员"; 22 } 23 }
[3]准备ArticleService
1 /** 2 * @author 戴着假发的程序员 3 * 4 * @description 5 */ 6 public class ArticleService { 7 private IAutorDAO autorDAO; 8 private IArticleDAO articleDAO; 9 10 public void setAutorDAO(IAutorDAO autorDAO) { 11 this.autorDAO = autorDAO; 12 } 13 14 public void setArticleDAO(IArticleDAO articleDAO) { 15 this.articleDAO = articleDAO; 16 } 17 18 public int save(String title){ 19 String author = autorDAO.get(); 20 System.out.println("ArticleService-save:"); 21 System.out.println("author:"+author); 22 return articleDAO.save(title); 23 }; 24 }
[4]添加一个配置类,并且在配置类中使用@Bean的方式配置上面的是三个类:
1 /** 2 * @author 戴着假发的程序员 3 * 4 * @description 5 */ 6 @Configuration 7 public class AppConfig { 8 //配置 ArticleDAO对象 9 @Bean 10 public IArticleDAO articleDAO(){ 11 return new ArticleDAO(); 12 } 13 //配置 AuthorDAO 14 @Bean 15 public IAutorDAO authorDAO(){ 16 return new AuthorDAO(); 17 } 18 //配置ArticleService对象 19 @Bean 20 public ArticleService articleService(){ 21 ArticleService articleService = new ArticleService(); 22 //注入对应的属性 23 articleService.setArticleDAO(articleDAO()); 24 articleService.setAutorDAO(authorDAO()); 25 return articleService; 26 } 27 }
[5]测试:
1 @Test 2 public void testAnnotation(){ 3 ApplicationContext ac = 4 new AnnotationConfigApplicationContext(AppConfig.class); 5 ArticleService bean = ac.getBean(ArticleService.class); 6 bean.save("spring应用手册"); 7 }
标签:假发,author,spring,Helloworld,程序员,ArticleService,2.1,save,public 来源: https://www.cnblogs.com/jiafa/p/13776299.html