Spring中的JdbcTemplate详细解析

        <!--导入spring的jdbc坐标-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <!--导入spring的tx坐标-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>

CREATE DATABASE Test
 
CREATE TABLE ACCOUNT(
	NAME VARCHAR(255),
	money INT);
	
SELECT * FROM ACCOUNT

public class Account {
    private String name;
    private double money;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public double getMoney() {
        return money;
    }
    public void setMoney(double money) {
        this.money = money;
    }
    @Override
    public String toString() {
        return "Account{" +
                "name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

public class JdbcTemplateTest {
 
    @Test
    //测试JdbcTemplate快速入门
    public void test1() throws PropertyVetoException {
        //创建数据源对象
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setDriverClass("com.mysql.jdbc.Driver");
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test");
        dataSource.setUser("root");
        dataSource.setPassword("ggm");
 
        //创建模板对象
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        //设置数据源对象
        jdbcTemplate.setDataSource(dataSource);
        //执行操作
        int row = jdbcTemplate.update("insert into account values(?,?)", "tom", 5000);
        System.out.println(row);
    }
 
}

    <!--配置数据源对象-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
 
    <!--jdbc模板对象-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    @Test
    //测试Spring产生Jdbc模板对象
    public void test2() throws PropertyVetoException {
        ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
        JdbcTemplate jdbcTemplate = app.getBean(JdbcTemplate.class);
        int row = jdbcTemplate.update("insert into account values(?,?)", "zhangsan", 6000);
        System.out.println(row);
    }

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class JdbcTemplateCRUDTest {
 
    @Autowired
    private JdbcTemplate jdbcTemplate;
 
    //修改操作
    @Test
    public void testUpdate() {
        jdbcTemplate.update("update account set money=? where name=?", 10000, "tom");
    }
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class JdbcTemplateCRUDTest {
 
    @Autowired
    private JdbcTemplate jdbcTemplate;
 
    //删除操作
    @Test
    public void testDelete() {
        jdbcTemplate.update("delete from account where name=?", "tom");
    }
 
    //查询多个对象
    @Test
    public void testQueryAll() {
        List<Account> accountList = jdbcTemplate.query("select * from account", new BeanPropertyRowMapper<Account>(Account.class));
        System.out.println(accountList);
    }
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class JdbcTemplateCRUDTest {
 
    @Autowired
    private JdbcTemplate jdbcTemplate;
 
    //查询单个对象
    @Test
    public void testQueryOne() {
        Account account = jdbcTemplate.queryForObject("select * from account where name=?", new BeanPropertyRowMapper<Account>(Account.class), "tom");
        System.out.println(account);
    }
 
    //聚合查询
    @Test
    public void testQueryCount() {
        Long count = jdbcTemplate.queryForObject("select count(*) from account", Long.class);
        System.out.println(count);
    }
}