Spring5学习笔记（13） — “JdbcTemplate 操作数据库（批量增删改）”

Posted 2021-11-02 一切因为是码农

JdbcTemplate 操作数据库（批量增删改）

• 一、批量添加操作
• 二、批量修改操作
• 三、批量删除操作

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);

---