Spring5学习笔记(13) — “JdbcTemplate 操作数据库(批量增删改)”
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JdbcTemplate 操作数据库(批量增删改)
1.JdbcTemplate的 批量增加、修改、删除操作
均由JdbcTemplate 的 batchUpdate 方法实现
该方法有两个参数:
参数一:sql(操作对应的sql语句)
参数二:List集合,添加多条记录数据
一、批量添加操作
//1.编写bookDao接口
public interface bookDao
//批量添加操作
void batchAddbooks(List<Object[]> batchAddlist);
//2.编写接口实现类bookDaoImple
@Repository
public class bookDaoImple implements bookDao
//注入JdbcTemplate
@Autowired
private JdbcTemplate jdbcTemplate;
//批量添加操作
@Override
public void batchAddbooks(List<Object[]> batchAddlist)
String sql = "insert into book values(?,?,?)";
int[] ints = jdbcTemplate.batchUpdate(sql, batchAddlist);
System.out.println(ints);
//3.编写service类
@Service
public class bookService
//1.注入dao
@Autowired
private bookDao bookdao;
//实现批量添加
public void batchAddbook(List<Object[]> batchAddlist)
bookdao.batchAddbooks(batchAddlist);
//4.编写测试类
//批量添加
List<Object[]> batchAddlist = new ArrayList<>();
Object[] o1 = "5","aaa","a";
Object[] o2 = "6","bbb","b";
Object[] o3 = "7","ccc","c";
batchAddlist.add(o1);
batchAddlist.add(o2);
batchAddlist.add(o3);
bookservice.batchAddbook(batchAddlist);
二、批量修改操作
//1.编写bookDao接口
public interface bookDao
//批量修改操作
void batchupdate(List<Object[]> batchAddlist);
//2.编写接口实现类bookDaoImple
@Repository
public class bookDaoImple implements bookDao
//注入JdbcTemplate
@Autowired
private JdbcTemplate jdbcTemplate;
//批量修改操作
@Override
public void batchupdate(List<Object[]> batchAddlist)
String sql = "update book set bookname=?,bookstatus=? where bookid=?";
int[] ints = jdbcTemplate.batchUpdate(sql, batchAddlist);
System.out.println(Arrays.toString(ints));
//3.编写service类
@Service
public class bookService
//1.注入dao
@Autowired
private bookDao bookdao;
//实现批量修改
public void batchupdate(List<Object[]> batchAddlist)
bookdao.batchupdate(batchAddlist);
//4.编写测试类
//批量修改
List<Object[]> batchAddlist = new ArrayList<>();
//注意数组中值的顺序要对应sql中参数出现的顺序
Object[] o1 = "aaa111","a1","5";
Object[] o2 = "bbb222","b2","6";
Object[] o3 = "ccc333","c3","7";
batchAddlist.add(o1);
batchAddlist.add(o2);
batchAddlist.add(o3);
bookservice.batchupdate(batchAddlist);
三、批量删除操作
//1.编写bookDao接口
public interface bookDao
//批量删除操作
void batchDelete(List<Object[]> batchAddlist);
//2.编写接口实现类bookDaoImple
@Repository
public class bookDaoImple implements bookDao
//注入JdbcTemplate
@Autowired
private JdbcTemplate jdbcTemplate;
//批量删除操作
@Override
public void batchDelete(List<Object[]> batchAddlist)
String sql = "delete from book where bookid=?";
int[] ints = jdbcTemplate.batchUpdate(sql, batchAddlist);
System.out.println(Arrays.toString(ints));
//3.编写service类
@Service
public class bookService
//1.注入dao
@Autowired
private bookDao bookdao;
//实现批量删除
public void batchdelete(List<Object[]> batchAddlist)
bookdao.batchDelete(batchAddlist);
//4.编写测试类
//批量删除
List<Object[]> batchAddlist = new ArrayList<>();
Object[] o1 = "5";
Object[] o2 = "6";
Object[] o3 = "7";
batchAddlist.add(o1);
batchAddlist.add(o2);
batchAddlist.add(o3);
bookservice.batchdelete(batchAddlist);
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