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Spring JdbcTemplate CRUD????

????

?????????????

• ???????
• Spring JdbcTemplate CRUD????
• ???RowMapper??
• ???????????

?????

package cn.guardwhy.domain;@Data@NoArgsConstructor@AllArgsConstructorpublic class Account {    private Integer id;    private String name;    private Float money;}

Spring JdbcTemplate CRUD????

????

package cn.guardwhy.jdbc;import cn.guardwhy.domain.Account;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import org.springframework.jdbc.core.JdbcTemplate;import org.springframework.jdbc.core.RowMapper;import java.util.List;public class JdbcTemplateCRUD {    public static void main(String[] args) {        // ??Spring???????Spring IOC??        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:bean.xml");                // ??JdbcTemplate??        JdbcTemplate jdbcTemplate = (JdbcTemplate) context.getBean("jdbcTemplate");                // ??????        List
   
     list = jdbcTemplate.query("SELECT id, name, money FROM account", new RowMapper
    
     () {            @Override            public Account mapRow(ResultSet rs, int index) throws SQLException {                Account account = new Account();                account.setId(rs.getInt("id"));                account.setName(rs.getString("name"));                account.setMoney(rs.getFloat("money"));                return account;            }        });                // ????        for (Account account : list) {            System.out.println(account);        }                // ??????        System.out.println("??????-------");        Integer accountNum = jdbcTemplate.queryForObject("SELECT COUNT(*) FROM account", Integer.class);        System.out.println("??????:" + accountNum);    }}
    
   

???RowMapper

package cn.guardwhy.resources;import cn.guardwhy.domain.Account;import org.springframework.jdbc.core.RowMapper;import java.sql.ResultSet;import java.sql.SQLException;public class AccountRowMapper implements RowMapper
   
     {    @Override    public Account mapRow(ResultSet rs, int index) throws SQLException {        Account account = new Account();        account.setId(rs.getInt("id"));        account.setName(rs.getString("name"));        account.setMoney(rs.getFloat("money"));        return account;    }}
   

????

package cn.guardwhy.jdbc;import cn.guardwhy.domain.Account;import cn.guardwhy.resources.AccountRowMapper;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import org.springframework.jdbc.core.JdbcTemplate;import java.util.List;public class JdbcTemplateCRUD {    public static void main(String[] args) {        // ??Spring???????Spring IOC??        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:bean.xml");                // ??JdbcTemplate??        JdbcTemplate jdbcTemplate = (JdbcTemplate) context.getBean("jdbcTemplate");                // ??????RowMapper????        List
   
     list = jdbcTemplate.query("SELECT * FROM account", new AccountRowMapper());                // ????        for (Account account : list) {            System.out.println(account);        }                // ??????        System.out.println("??????-------");        Integer accountNum = jdbcTemplate.queryForObject("SELECT COUNT(*) FROM account", Integer.class);        System.out.println("??????:" + accountNum);    }}
   

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?????????????Spring JdbcTemplate?CRUD??????????????????????????????RowMapper??????????????????????????

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