JavaJDBC【四、存储过程的使用】

Mysql还没学到存储过程，不过语法比较简单

此处不深究数据库中的存储过程怎么创建，后面在mysql的学习笔记里再做整理

今天只整理java中如何调用存储过程

• 语句
  
  CallableStatement cs = (CallableStatement) con.prepareCall("call testProcedure()"); //使用prepareCall，用存储过程初始化
  
  ResultSet rs = cs.getResultSet(); //直接调用，返回resultset

cs.registerOutParameter(1, Types.INTEGER); //设置出参

cs.execute(); //或设置出参后直接调用，返回出参

cs.getInt(1); //获取返回值

1. 无参存储过程的调用

    public static List<JDBCModel> proceNoParam() throws SQLException {
	List<JDBCModel> relist = new ArrayList<JDBCModel>();
	Connection con = DBUtil.GetConnection();
	CallableStatement cs = (CallableStatement) con
			.prepareCall("call testProcedure()");
	cs.execute();
	ResultSet rs = cs.getResultSet();
	while (rs.next()) {
		JDBCModel m = new JDBCModel();
		m.setId(rs.getInt("id"));
		m.setName(rs.getString("name"));
		m.setCreatetime(rs.getDate("createtime"));
		relist.add(m);
	}
	return relist;
}

2. 含入参存储过程的调用

    public static List<JDBCModel> proceInParam(int id) throws SQLException {

	List<JDBCModel> relist = new ArrayList<JDBCModel>();
	Connection con = DBUtil.GetConnection();
	CallableStatement cs = (CallableStatement) con
			.prepareCall("call testInParam(?)");
	cs.setInt(1, id);
	cs.execute();
	ResultSet rs = cs.getResultSet();
	while (rs.next()) {
		JDBCModel m = new JDBCModel();
		m.setId(rs.getInt("id"));
		m.setName(rs.getString("name"));
		m.setCreatetime(rs.getDate("createtime"));
		relist.add(m);
	}
	return relist;
}

3. 含出参（非ResultSet）存储过程的调用

    public static int proceOutParam() throws SQLException {
	Connection con = DBUtil.GetConnection();
	CallableStatement cs = (CallableStatement) con
			.prepareCall("call testOutParam(?)");
	cs.registerOutParameter(1, Types.INTEGER);
	cs.execute();
	int c = cs.getInt(1);
	return c;
}