JdbcTemplate如何进行批处理操作?

在JdbcTemplate中执行批处理操作,可以通过以下步骤进行:

  1. 添加Maven依赖:
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>
  1. 定义数据源和JdbcTemplate:
@Bean
public DataSource dataSource() {
    return new DriverManagerDataSource(url, username, password);
}

@Bean
public JdbcTemplate jdbcTemplate(DataSource dataSource) {
    return new JdbcTemplate(dataSource);
}
  1. 编写批处理方法:
@Repository
public class UserDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;

    public void batchInsertUser(List<User> users) {
        jdbcTemplate.batchUpdate("INSERT INTO user (name, age) VALUES (?, ?)",
            new BatchPreparedStatementSetter() {
                public void setValues(PreparedStatement ps, int i) throws SQLException {
                    User user = users.get(i);
                    ps.setString(1, user.getName());
                    ps.setInt(2, user.getAge());
                }
                public int getBatchSize() {
                    return users.size(); 
                }
            }
        );
    }
}
  • 实现BatchPreparedStatementSetter接口,在setValues()方法中设置SQL语句的参数值。
  • getBatchSize()方法返回批量更新的记录条数。
  • jdbcTemplate.batchUpdate()执行批量更新操作。

4. 在Service层调用:

@Service
public class UserService {
    @Autowired
    private UserDao userDao;

    public void saveUsers(List<User> users) {
        userDao.batchInsertUser(users);
    }
}
  1. 在Controller层接收请求并调用:
@RestController  
public class UserController {
    @Autowired
    private UserService userService;

    @PostMapping("/saveUsers")
    public void saveUsers(@RequestBody List<User> users) {
        userService.saveUsers(users);
    }
}