Spring全注解开发

  package com.lily.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.*;

import javax.sql.DataSource;

@Configuration   //声明是配置文件
@ComponentScan({"com.lily.dao","com.lily.service"})  //声明包扫描
@PropertySource("classpath:druid_datasource_config.properties")  //声明配置文件
public class Config {

    @Value("${jdbc.name}")  //配置文件的取值
    private String username;
    @Value("${jdbc.password}")
    private String password;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.driver}")
    private String driver;

    @Bean  //声明提供类
    public DataSource getDataSource(){
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setUsername(username);
        druidDataSource.setPassword(password);
        druidDataSource.setDriverClassName(driver);
        druidDataSource.setUrl(url);
        return druidDataSource;
    }

}

Dao

@Component  //声明类对象
public class AccountDaoImpl implements AccountDao {


    @Autowired  //获取类对象
    private DataSource dataSource;

    @Override
    public List<AccountBean> queryAll() {
        QueryRunner queryRunner = new QueryRunner(dataSource);
        String sql = "select * from account";
        try {
            return queryRunner.query(sql, new BeanListHandler<AccountBean>(AccountBean.class));
        } catch (SQLException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }


    }
}

Service

@Component("accountService")
public class AccountServiceImpl implements AccountService {

    @Resource
    private AccountDao accountDao;


    @Override
    public void addAccount(AccountBean accountBean) {
        accountDao.addAccount(accountBean);
    }

    @Override
    public List<AccountBean> findAll() {
        return accountDao.queryAll();
    }
}

Test 测试:

    @Test
    public void test01(){
        ConfigurableApplicationContext context = new AnnotationConfigApplicationContext(Config.class);
        AccountService bean = context.getBean(AccountService.class);
        List<AccountBean> all = bean.findAll();
        all.forEach(accountBean -> System.out.println(accountBean));
    }