基于注解的IOC案例-编写spring的Ioc配置

1. dao层

   @Repository("accountDao")
   public class AccountDaoImpl implements IAccountDao {
          
   	@Autowired
       private QueryRunner runner;
       public List<Account> findAllAccount() {
          
           try{
          
               return runner.query("select * from account",new BeanListHandler<Account>(Account.class));
           }catch (Exception e) {
          
               throw new RuntimeException(e);
           }
       }
   }
   

   public interface IAccountDao {
          
       List<Account> findAllAccount();
   

}

2. service层

```java
@Service("accountService")
public class AccountServiceImpl implements IAccountService{
    @Autowired
    private IAccountDao accountDao;
    public List findAllAccount() {
        List account= accountDao.findAllAccount();
        return accountDao.findAllAccount();
    }
}

   public interface IAccountService {
     
       List<Account> findAllAccount();
   }
   

3. domain层

   public class Account implements Serializable {
          
   
       private Integer id;
       private String name;
       private Float money;
   
       public Integer getId() {
          
           return id;
       }
   
       public void setId(Integer id) {
          
           this.id = id;
       }
   
       public String getName() {
          
           return name;
       }
   
       public void setName(String name) {
          
           this.name = name;
       }
   
       public Float getMoney() {
          
           return money;
       }
   
       public void setMoney(Float money) {
          
           this.money = money;
       }
   
       @Override
       public String toString() {
          
           return "Account{" +
                   "id=" + id +
                   ", name='" + name + '\'' +
                   ", money=" + money +
                   '}';
       }
   }
   

4. 数据库连接信息jdbcConfig.properties

   jdbc.driver=com.mysql.jdbc.Driver
   jdbc.url=jdbc:mysql://localhost:3306/nba
   jdbc.username=root
   jdbc.password=root
   

5. 数据库配置文件

   package com.chen.config;
   
   import com.mchange.v2.c3p0.ComboPooledDataSource;
   import org.apache.commons.dbutils.QueryRunner;
   import org.springframework.beans.factory.annotation.Value;
   import org.springframework.context.annotation.Bean;
   import org.springframework.context.annotation.PropertySource;
   import org.springframework.context.annotation.Scope;
   
   import javax.sql.DataSource;
   import java.beans.PropertyVetoException;
   
   public class DataSourceConfiguration {
          
       /**
     * 
        * 
        * 
        * 
        * 使用注解 将从容器中 注入属性
        */
       @Value("${jdbc.driver}")
       private String driver;
       
       @Value("${jdbc.url}")
       private String url;
   
       @Value("${jdbc.username}")
       private String username;
   
       @Value("${jdbc.password}")
       private String password;
   
       @Bean(name="runner")
       @Scope("prototype")
       public QueryRunner createQueryRunner(DataSource dataSource){
          
           return new QueryRunner(dataSource);
       }
   
       @Bean(name = "dataSource")
       public DataSource CreateDs(){
          
           ComboPooledDataSource ds = new ComboPooledDataSource();
           try {
          
               ds.setDriverClass(driver);
               ds.setJdbcUrl(url);
               ds.setUser(username);
               ds.setPassword(password);
           } catch (PropertyVetoException e) {
          
               e.printStackTrace();
           }
           return ds;
       }
   }
   

6. xml替代配置文件

   //表示是spring的配置文件
   @Configuration
   //
   @ComponentScan("com.chen")
   //
   @PropertySource("classpath:jdbcConfig.properties")
   /*@Import(JdbcConfig.class)*/
   @Import(DataSourceConfiguration.class)
   public class SpringConfiguration {
          
   }
   

7. 测试层

   @RunWith(SpringJUnit4ClassRunner.class)
   /*@ContextConfiguration("classpath:bean.xml")*/
   @ContextConfiguration(classes = SpringConfiguration.class)
   public class AccountTest {
          
   
       @Autowired
       private IAccountService is;
   
       @Test
       public void test(){
          
           List<Account> account = is.findAllAccount();
           System.out.println(account);
       }
   }