2020/11/2

一.

今天在这里写了一个查找的函数

public List<information> tcha (String m) {
		String sql="select * from text2 where ";
		if(m!="") {
				sql+="tname = '"+m+"'";		
		}
		System.out.println(sql);
		
		Connection conn = DBUtil.getConn();
		Statement state = null;
		
		ResultSet rs = null;
		List<information> list = new ArrayList<>();
		try {
			state = conn.createStatement();
			rs = state.executeQuery(sql);
			information bean = null;
			while (rs.next()) {
				String tid = rs.getString("tid");
                String tname = rs.getString("tname");
                String tsex = rs.getString("tsex");
                String tlocation=rs.getString("tlocation");
                String tzc = rs.getString("tzc");
                System.out.println(tid);
                bean=new information(tid,tname,tsex,tlocation,tzc);
				list.add(bean);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			DBUtil.close(state, conn);
		}
		return list;
		}

 查找的函数和遍历相似

public List<jieyue> jiecha () {
	String sql="select * from jieyue";
	Connection conn = DBUtil.getConn();
	Statement state = null;
	
	ResultSet rs = null;
	List<jieyue> list = new ArrayList<>();
	try {
		state = conn.createStatement();
		rs = state.executeQuery(sql);
		jieyue bean = null;
		while (rs.next()) {
			String bid = rs.getString("bid");
            String bname = rs.getString("bname");
            String rid = rs.getString("rid");
            String rname=rs.getString("rname");
            String day = rs.getString("day");
            
            bean=new jieyue(bid,bname,rid,rname,day);
			list.add(bean);
		}
	} catch (Exception e) {
		e.printStackTrace();
	} finally {
		DBUtil.close(state, conn);
	}
	return list;
}

 这个函数是遍历

二.修改函数出现了一些意外

三.web