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示例代码#xff1a;
创建实体类 Product
package test.spri…Spring 泛型依赖注入是利用泛型的优点对代码时行精简将可重复使用的代码全部放到一个类之中方便以后的维护和修改同时在不增加代码的情况下增加代码的复用性。
示例代码
创建实体类 Product
package test.spring.model;public class Product {private int id ;private String name;/* setter getter省略 */Overridepublic String toString() {return Product [id id , name name ];}} User package test.spring.model;public class User {private int id;private String name;/* setter、getter省略 */Overridepublic String toString() {return User [id id , name name ];}public User() {super();}} 创建Dao层相关接口及实现类 对dao层的相同功能提取出来创建一个带泛型的BaseDao类用于共用。 package test.spring.Dao;import org.springframework.stereotype.Repository;/*必须加入注解将BaseDao注入Spring容器因为BaseService中有引用该类*/
Repository
public class BaseDaoT {public void add(T t) {System.out.println(BaseDao....t);}} UserDao接口 package test.spring.Dao;import test.spring.model.User;public interface UserDao {public void add(User user);}UserDao实现类 package test.spring.Dao;
import org.springframework.stereotype.Repository;import test.spring.model.User;
Repository (userDaoImpl)
public class UserDaoImpl extends BaseDaoUser implements UserDao {}ProductDao接口 package test.spring.Dao;import test.spring.model.Product;public interface ProductDao {public void add(Product pro);
} ProductDao实现类 package test.spring.Dao;import org.springframework.stereotype.Repository;import test.spring.model.Product;
Repository(productDao)
public class ProductDaoImpl extends BaseDaoProduct implements ProductDao {} Spring配置 ?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexmlns:contexthttp://www.springframework.org/schema/contextxsi:schemaLocationhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsdcontext:component-scan base-packagetest.spring /context:component-scan/beans 测试 package testSpring;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import test.spring.model.Product;
import test.spring.model.User;
import test.spring.service.ProductService;
import test.spring.service.UserService;public class TestSpring {Testpublic void testUser() {ApplicationContext ac new ClassPathXmlApplicationContext(applicationContext.xml);UserService userService(UserService) ac.getBean(userService);userService.add(new User());System.out.println(-----------------------------);ProductService proService (ProductService) ac.getBean(prodcutService);proService.add(new Product());}
} 结果
