本文我们一起看看Spring Boot中 JdbcClient 和 JdbcTemplate 之间的差异。
以下内容使用的Java和Spring Boot版本为:
- Java 21
- Spring Boot 3.2.1
假设我们有一个ICustomerService接口:- public interface ICustomerService {
-
- List<Customer> getAllCustomer();
- Optional<Customer> getCustomerById(int id);
- void insert(Customer customer);
- void update(int id, Customer customer);
-
- void delete(int id);
- }
复制代码 其中,涵盖了我们常见的数据CRUD操作。
下面就来一起看看,分别使用 JDBC Client 和 JDBC Template 的实现。
初始化对比
JdbcTemplate的初始化:- private final JdbcTemplate jdbcTemplate;
- public CustomerJdbcTemplateService(JdbcTemplate jdbcTemplate){
- this.jdbcTemplate = jdbcTemplate;
- }
复制代码 JdbcClient的初始化;- private final JdbcClient jdbcClient;
- public CustomerJdbcClientService(JdbcClient jdbcClient){
- this.jdbcClient = jdbcClient;
- }
复制代码 增删改查的实现对比
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查询的实现对比
getAllCustomer查询返回集合数据的实现对比:- // jdbcTemplate实现
- private final RowMapper<Customer> rowMapper = (rs, row)
- -> new Customer(rs.getInt("id"), rs.getString("name"), rs.getString("lastname"), rs.getDate("birthday"));
- public List<Customer> getAllCustomer() {
- return jdbcTemplate.query("select id, name, lastname, birthday from customer", rowMapper);
- }
- // jdbcClient实现
- public List<Customer> getAllCustomer(){
- return jdbcClient.sql("select id, name, lastname, birthday from customer").query(Customer.class).list();
- }
复制代码 getCustomerById查询返回单条数据的实现对比:- // jdbcTemplate实现
- public Optional<Customer> getCustomerById(int id) {
- Customer customer = null;
- try {
- customer = jdbcTemplate.queryForObject("select id, name, lastname, birthday from customer where id = ?", rowMapper, id );
- } catch (DataAccessException ex){
- LOG.error("Data not found. Id parameter: " + id, ex);
- }
- return Optional.ofNullable(customer);
- }
- // jdbcClient实现
- public Optional<Customer> getCustomerById(int id){
- return jdbcClient.sql("select id, name, lastname, birthday from customer where id= :id")
- .param("id", id)
- .query(Customer.class)
- .optional();
- }
复制代码 insert插入数据的实现对比
- // jdbcTemplate实现
- public void insert(Customer customer) {
- int inserted = jdbcTemplate.update("insert into customer (id, name, lastname, birthday) values (?,?,?,?)",
- customer.id(), customer.name(), customer.lastname(),customer.birthday());
- Assert.state(inserted == 1 , "An exception error occurred while inserting customer");
- }
- // jdbcClient实现
- public void insert(Customer customer){
- int inserted = jdbcClient.sql("insert into customer (id, name, lastname, birthday) values (?,?,?,?)")
- .params(List.of(customer.id(), customer.name(), customer.lastname(), customer.birthday()))
- .update();
- Assert.state(inserted == 1 , "An exception error occurred while inserting customer");
- }
复制代码 update更新数据的实现对比
- // jdbcTemplate实现
- public void update(int id, Customer customer) {
- int updated = jdbcTemplate.update("update customer set name = ?, lastname = ?, birthday = ? where id = ? ",
- customer.name(), customer.lastname(),customer.birthday(), id);
- Assert.state(updated == 1 , "An exception error occurred while updating customer");
- }
- // jdbcClient实现
- public void update(int id, Customer customer){
- int updated = jdbcClient.sql("update customer set name = ?, lastname = ?, birthday = ? where id = ?")
- .params(List.of(customer.name(), customer.lastname(), customer.birthday(), id))
- .update();
- Assert.state(updated == 1, "An exception error occurred while updating customer");
- }
复制代码 delete删除数据的实现对比
- // jdbcTemplate实现
- public void delete(int id) {
- int deleted = jdbcTemplate.update("delete from customer where id = ?", id);
- Assert.state(deleted == 1 , "An exception error occurred while deleting customer");
- }
- // jdbcClient实现
- public void delete(int id) {
- int deleted = jdbcClient.sql("delete from customer where id = :id").param("id",id).update();
- Assert.state(deleted == 1, "An exception error occurred while updating customer");
- }
复制代码 总结
上面我们分别演示了JdbcClient 和 JdbcTemplate从初始化到真正执行增删改查操作的代码样例。总体上来说,JdbcClient的实现更为简洁方便。如果不考虑其他ORM框架的情况下,在未来的Spring Boot版本中,我会更偏向于选择JdbcClient来操作数据库。那么您觉得怎么样呢?留言区一起聊聊~
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