oracle学习笔记（二十三）——JDBC调用存储过程以及批量操作

jdbc调用存储过程

使用并获得out模式的参数返回值

//存储过程为sum_sal(deptno department.deptno%type,sum in out number)
CallableStatement cs =conn.prepareCall("{call sum_sal(?,?)}");
cs.setInteger(1,7879);
cs.setDouble(2,0.0);//第二个传什么都无所谓，因为第二个参数是in out模式，是作为输出的
cs.registerOutParameter(2,java.sql.Types.Double,2)；//最后那个参数是保留小数点2位
cs.excute();//执行会返回一个boolean结果

//获得结果，获取第二个参数
double result = cs.getDouble(2);

获得oracle返回的结果集

//存储过程为list(result_set out sys_refcursor, which in number)
CallableStatement cs =conn.prepareCall("{call list(?,?)}");
cs.setInteger(2,1);
cs.registerOutParameter(1,racleTypes.CURSOR);
cs.execute();
//获得结果集
ResultSet rs = (ResultSet)cs.getObject(1);

批量操作

批量插入

People表中只有两列，id和name ，还有对应的一个实体类People

批量操作应该放到事务里进行，因为它会存在某条语句执行失败的情况。

public int[] insetBatch(List<People> list) {
	try (Connection connection = JdbcUtil.getConnection();
		 PreparedStatement ps = connection.prepareStatement("insert into PEOPLE values (?,?)");
	) {
		// 关闭事务自动提交，手动提交
		connection.setAutoCommit(false);
		//从list中取出数据
		for (People people : list) {
			ps.setInt(1, people.getId());
			ps.setString(2, people.getName());
			//加入到指语句组中
			ps.addBatch();
		}
		int[] recordsEffect = ps.executeBatch();
		// 提交事务
		connection.commit();
		return recordsEffect;

	} catch (SQLException e) {
		e.printStackTrace();
	}
	return null;
}

批量插入测试

public static void main(String[] args) {
	List<People> list = new ArrayList<>();
	int id = 1;
	list.add(new People(id++, "james"));
	list.add(new People(id++, "andy"));
	list.add(new People(id++, "jack"));
	list.add(new People(id++, "john"));
	list.add(new People(id++, "scott"));
	list.add(new People(id++, "jassica"));
	list.add(new People(id++, "jerry"));
	list.add(new People(id++, "marry"));
	list.add(new People(id++, "alex"));

	int[] ints = new BatchTest().insetBatch(list);

	System.out.println(Arrays.toString(ints));
}

批量更新

public int[] updateBatch(List<People> list) {
	try (Connection connection = JdbcUtil.getConnection();
		 PreparedStatement ps = connection.prepareStatement("undate people set name=? where id=?");
	) {
		// 关闭事务自动提交，手动提交
		connection.setAutoCommit(false);
		//从list中取出数据
		for (People people : list) {
			ps.setInt(1, people.getId());
			ps.setString(2, people.getName());
			//加入到指语句组中
			ps.addBatch();
		}
		int[] recordsEffect = ps.executeBatch();
		// 提交事务
		connection.commit();
		return recordsEffect;

	} catch (SQLException e) {
		e.printStackTrace();
	}
	return null;
}

批量删除

public int[] updateBatch(List<People> list) {
	try (Connection connection = JdbcUtil.getConnection();
		 PreparedStatement ps = connection.prepareStatement("delete people where id=?");
	) {
		// 关闭事务自动提交，手动提交
		connection.setAutoCommit(false);
		//从list中取出数据
		for (People people : list) {
			ps.setInt(1, people.getId());
			//加入到指语句组中
			ps.addBatch();
		}
		int[] recordsEffect = ps.executeBatch();
		// 提交事务
		connection.commit();
		return recordsEffect;

	} catch (SQLException e) {
		e.printStackTrace();
	}
	return null;
}