if(!(isInvalid(strwhere)))是什么意思啊大佬们

2020-06-17 04:26:11 3.1k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Access实现数据查询代码查询条件在这段代码中，我们可以看到多个查询条件的判断语句，例如：* If Not IsNull(Me.客户编号) Then* If Not IsNull(Me.机号) Then* If Not IsNull 立即下载

if(!(isInvalid(strwhere)))
{
sql+=" where "+strwhere;
}
if(!(isInvalid(strorder)))
{
sql+=" order by "+strorder;
}
Statement stat = null;
ResultSet rs = null;
Connection conn = new DBHelper().getConn();
List<AdminBean> list=new ArrayList<AdminBean>();
try{
stat = conn.createStatement();
rs = stat.executeQuery(sql);
while(rs.next()){
AdminBean cnbean=new AdminBean();
cnbean.setAdmin_ID(rs.getInt("Admin_ID"));
cnbean.setAdmin_Username(rs.getString("Admin_Username"));
cnbean.setAdmin_Password(rs.getString("Admin_Password"));
cnbean.setAdmin_Name(rs.getString("Admin_Name"));
cnbean.setAdmin_Sex(rs.getString("Admin_Sex"));
cnbean.setAdmin_Tel(rs.getString("Admin_Tel"));
list.add(cnbean);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (conn != null)
conn.close();
if (stat != null)
stat.close();
if (rs != null)
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return list;
}
开头的f(!(isInvalid(strwhere)))是什么意思啊大佬们，小白真的不懂了求救

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