Spring JdbcTemplate执行数据库操作详解

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close"> 
	<property name="url" value="jdbc:mysql:///user_db" />
	<property name="username" value="root" />
	<property name="password" value="root" />
	<property name="driverClassName" value="com.mysql.jdbc.Driver" />
</bean>

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

<!-- 组件扫描 --> <context:component-scan base-package="com.atguigu"></context:component-scan>

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

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

public class UserT {
    private String userId;
    private String username;
    private String ustatus;
    public String getUserId() {
        return userId;
    }
    public void setUserId(String userId) {
        this.userId = userId;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getUstatus() {
        return ustatus;
    }
    public void setUstatus(String ustatus) {
        this.ustatus = ustatus;
    }
}

@Repository
public class BookDaoImpl implements BookDao {
	//注入 JdbcTemplate
	@Autowired
	private JdbcTemplate jdbcTemplate;
	//添加的方法
	@Override
	public void add(Book book) {
		//1 创建 sql 语句
		String sql = "insert into t_book values(?,?,?)";
		//2 调用方法实现
		Object[] args = {book.getUserId(), book.getUsername(), book.getUstatus()};
		int update = jdbcTemplate.update(sql,args);
		System.out.println(update);
	} 
}

@Test
public void testJdbcTemplate() {
	ApplicationContext context =
	new ClassPathXmlApplicationContext("bean1.xml");
	BookService bookService = context.getBean("bookService", 
	BookService.class);
	Book book = new Book();
	book.setUserId("1");
	book.setUsername("java");
	book.setUstatus("a");
	bookService.addBook(book);
}

@Override
public void updateBook(Book book) {
	String sql = "update t_book set username=?,ustatus=? where user_id=?";
	Object[] args = {book.getUsername(), book.getUstatus(),book.getUserId()};
	int update = jdbcTemplate.update(sql, args);
	System.out.println(update);
}

@Override
public void delete(String id) {
	String sql = "delete from t_book where user_id=?";
	int update = jdbcTemplate.update(sql, id);
	System.out.println(update);
}

@Overridepublic int selectCount() {<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->String sql = "select count(*) from t_book";Integer count = jdbcTemplate.queryForObject(sql, Integer.class);return count;}@Override
public int selectCount() {
	String sql = "select count(*) from t_book";
	Integer count = jdbcTemplate.queryForObject(sql, Integer.class);
	return count;
}

@Override
	public Book findBookInfo(String id) {
	String sql = "select * from t_book where user_id=?";
	//调用方法
	Book book = jdbcTemplate.queryForObject(sql, new 
	BeanPropertyRowMapper<Book>(Book.class), id);
	return book;
}

@Override
public List<Book> findAllBook() {
	String sql = "select * from t_book";
	//调用方法
	List<Book> bookList = jdbcTemplate.query(sql, new 
	BeanPropertyRowMapper<Book>(Book.class));
	return bookList;
}

@Override
public void batchAddBook(List<Object[]> batchArgs) {
	String sql = "insert into t_book values(?,?,?)";
	int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
	System.out.println(Arrays.toString(ints));
}

List<Object[]> batchArgs = new ArrayList<>();
Object[] o1 = {"3","java","a"};
Object[] o2 = {"4","c++","b"};
Object[] o3 = {"5","MySQL","c"};
batchArgs.add(o1);
batchArgs.add(o2);
batchArgs.add(o3);
//调用批量添加
bookService.batchAdd(batchArgs);

@Override
public void batchUpdateBook(List<Object[]> batchArgs) {
	String sql = "update t_book set username=?,ustatus=? where user_id=?";
	int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
	System.out.println(Arrays.toString(ints));
}

@Override
public void batchDeleteBook(List<Object[]> batchArgs) {
	String sql = "delete from t_book where user_id=?";
	int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
	System.out.println(Arrays.toString(ints));
}