prop.driverClass=com.mysql.jdbc.Driver
prop.url=jdbc:mysql://localhost:3306/userDb
prop.username=root
prop.password=123456

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <context:component-scan base-package="com.pingguo.spring5"></context:component-scan>
    <!--引入外部屬性文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置連接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${prop.driverClass}"></property>
        <property name="url" value="${prop.url}"></property>
        <property name="username" value="${prop.username}"></property>
        <property name="password" value="${prop.password}"></property>
    </bean>
</beans>

... ...
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <!--注入datasource-->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
... ...

@Repository
public class BookDaoImpl implements BookDao {
    // 注入 jdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
}

@Service
public class BookService {
    // 注入dao
    @Autowired
    private BookDao bookDao;
}

public class Book {
    private String userId;
    private String username;
    private String userStatus;
    public String getUserId() {
        return userId;
    }
    public void setUserId(String userId) {
        this.userId = userId;
    }
... ...

@Service
public class BookService {
    // 注入dao
    @Autowired
    private BookDao bookDao;
    public void addBook(Book book) {
        bookDao.add(book);
    }
}

@Repository
public class BookDaoImpl implements BookDao {
    // 注入 jdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
    @Override
    public void add(Book book) {
        String sql = "insert into t_book values (?, ?, ?)";
        int result = jdbcTemplate.update(sql, book.getUserId(), book.getUsername(), book.getUserStatus());
        System.out.println(result);
    }
}

public class TestBook {
    @Test
    public void testJdbc() {
        ApplicationContext context =
                new ClassPathXmlApplicationContext("bean1.xml");
        BookService bookService = context.getBean("bookService", BookService.class);
        Book book = new Book();
        book.setUserId("1");
        book.setUsername("ceshi");
        book.setUserStatus("3");
        bookService.addBook(book);
    }
}

八月 05, 2021 10:35:15 下午 com.alibaba.druid.pool.DruidDataSource info
信息: {dataSource-1} inited
1
Process finished with exit code 0