一种新的编程思路（上）：
难得糊涂编程法 GBDP （适用jsp、asp等编程）
GBDP技术实现设想：（General Blackbox Dynamic Programming）
开发速度快、代码量少、通用，数据库表自动生成，记录自动增加，
修改，删除，系统设计工作量少，可以在需求不明确的情况下开工，
渐进式开发，拥有需求频繁更改、代码基本不动的自适应能力。特
别适合国内软件乱序开发的国情
主要解决问题：
系统设计工作量大，需求更改影响大，项目交接困难，编程风格各
异，数据库备份困难的问题
已经实现功能：
数据表自动生成，记录自动增加，修改，删除，自动文件上传
GBDP功能示例：
无须建表，不用关心表结构、字段、值，保存更新全部自动化，
所有表结构统一使用id,pid,k,v四个字段(int,int,varchar(255),
varchar(255)) 自动事务处理
create table ntTest(
id int primary key ,
pid int not null ,
k varchar(255) not null ,
v varchar(255) not null
) -- Oracle和MSSQL支持varchar到4000-8000
因为Sybase的varchar(255)是最大长度。
写入数据库和读出数据到javascript使用了
ntEncodeSimple和ntEncodeDB的方法,否则特殊字符将导致错误
指定submit的name为edit,add来控制动作方式,
数据k(key)必须避开edit,add,submit,nouse等关键字
必须使网页元素的名称和字段名称相同,控件形式由程序自动处理,
不论text,radio,textarea
例如: 意见: 未处理 同意 不同意
这3个radio的名称都必须是"意见",然后值分别为"未处理 同意 不同意"
以下是表中内容的示例：（id，pid , k , v）
-8 1 意见 不同意
-7 1 份数 1
-6 1 公文种类 通知
-3 1 印发时间 2002-05-10
-2 1 保管期限 一年
-1 1 发文日期 2002-05-10
数据增删改页面：
<%@page contentType="text/html;charset=GBK" %>
<%@include file="ntHead.jsp" %>
<%@include file="ntGBDPDefine.jsp" %>
<%
file://全局变量定义在ntGBDPDefine.jsp中
globalTableName = "xxx"; // 将自动生成此表，并建立索引提高速度
parentKey = "文章发布";
parentValue = "";
dbName = "myDB";
isUpload = true; // 如果需要上传，指定为true
%>
<%@include file="ntGBDPUpload2-1.jsp" %>
<%
if( isPost ){
out.println("<script>alert('成功!');window.opener.location.reload();window.close();</script>");
return;
}
%>
<%@include file="ntGBDPUpload2-2.jsp" %>
…… 网页部分开始……
form表单
<form name="formSend" method="post" enctype="multipart/form-data"
action="<%= request.getRequestURI() %><%= hasId?( "?id="+id ):"" %>"
onsubmit="return checkOnSubmit()" >
交互元件:
<input type="radio" name="意见" value="同意">
<input type="submit" name="edit" value=" 确定 ">
<input type="file" name="附件" size="48" >
GBDP确认钮 ，ok , 确定, 所有页面统一使用
type="submit" name="<%= hasId?"edit":"add" %>"
id隐含，所有页面统一使用，用于自动载入相关记录
<input type="hidden" name="<%= hasId?"id":"nouse" %>" value="<%= id %>" >
删除显示 修改页面显示“删除”按钮，用hasId判断
<% if( hasId ){ %>
<tr>
<td width="78">删 除</td>
<td width="462">
<input type="checkbox" name="delete" value="nouse">
</td>
</tr>
<% } %>
…… 网页部分结束……
<%@include file="ntGBDPScript.jsp" %>
以上是所有需要的代码，不用再写任何其他的代码，就可以完成记录
的增删改等功能
----------------------------------------------------------------
下面查询语句约2秒, 100万/10万记录
select top 100 * from xxx_main
where 1=1
and pid =0 and k = '文章发布' and v = ''
and id in ( select pid from xxx_numeric
where k='numeric数值测试' and v >= 131129 )
and id in ( select pid from xxx_datetime
where k='date日期测试' and v > '2002-01-02' )
and id in ( select pid from xxx
where k='秘密等级' and v = '秘密' )
and id in ( select pid from xxx
where k='紧急程度' and v = '一般' )
order by id desc
----------------------------------------------------------------
所需文件：
ntGBDPDefine.jsp
<%
file://注意：本JSP被其他页面调用，不能产生额外的空格和回车
file://全局变量定义
String globalTableName ;
String parentKey ="" ;
String parentValue ="" ;
String dbName = "eweb";
ntDB ntP = new ntDB();
ntDB nt = new ntDB();
String sql ;
String sql_trans = "" ; file://用来插入后面的保存到数据库的sql语句中,使其中在事务之中间
String sql_TRANS_ERROR = " if @@error<>0 set @ntE=@ntE+1 \n";
boolean isPost = false ;
{
isPost = request.getMethod().equals("POST");
}
boolean isEdit = false ;
boolean isAdd = false ;
boolean isDelete = false ;
boolean isUpload = false ;
boolean hasId = false;
boolean hasMasterId = false;
int maxReturnRows = 1000 ;
int id = 0 ; // 表示主记录id号，一般为1,2,3......，必须在ntGBDPUpload.jsp
// 中获取，因为当upload的情况无法从request中获取参数
int masterId = 0 ; // 同上 , 用于主从表结构的实现
file://绝对路径
String realPath ; // like 'c:\a\'
{
realPath = getServletConfig().getServletContext().getRealPath("");
}
file://自动文件上传目录指定
String uploadDir;
{
uploadDir = realPath + "upload";
}
file://存放所有request的信息,使用它的原因是后面如果有upload的时候，
// request将没有任何参数和值，必须从upload中重新找到
java.util.Hashtable requestHt;
{
requestHt = new java.util.Hashtable();
Enumeration e = request.getParameterNames();
while( e.hasMoreElements() )
{
String s = (String)e.nextElement();
String sValue = request.getParameter(s);
requestHt.put( s , sValue );
}
}
%>
----------------------------------------------------------------
所需文件：
ntGBDPUpload2-1.jsp
<%@page contentType="text/html;charset=GBK" %>
<%@page import="java.lang.*,java.net.*,java.sql.*,java.text.*,java.util.*" %>
<%@page import="dba.ntDB" %>
<%@page import="com.jspsmart.upload.*"%>
<%@page session="true" %>
<%@ page errorPage="error.jsp"%>
<%
file://上传文件
if( isUpload && isPost )
{
java.io.File mydir=new java.io.File( uploadDir ); file://uploadDir is GlobalVar
if( !mydir.exists() )
if( !mydir.mkdir() )
throw new Exception("创建上传文件夹失败！[" + uploadDir + "]");
SmartUpload mySmartUpload=new SmartUpload();
mySmartUpload.initialize(pageContext);//初始化
mySmartUpload.upload();//上传
Request res = mySmartUpload.getRequest();
{
file://将request参数传入requestHt全局变量
Enumeration e = res.getParameterNames();
while( e.hasMoreElements() )
{
String s = ((String)e.nextElement()).trim();
String sValue = (res.getParameter(s)).trim();
requestHt.put( s , sValue );
}
}
Files files = mySmartUpload.getFiles();
String sfilename ="";
for(int i=0;i<files.getCount();i++){
com.jspsmart.upload.File file = files.getFile(i);
sfilename = file.getFileName();
//
String s = sfilename ;
if( !s.trim().equals("") )
requestHt.put( "uploadFileName"+i , s );
}
try{
mySmartUpload.save(uploadDir);
}catch(Exception e){
throw new Exception("上传文件失败！"+ e.getMessage() );
}
} // end if upload
%>
<%
isEdit = isPost && requestHt.get("edit")!=null ;
isAdd = isPost && requestHt.get("add")!=null ;
isDelete = requestHt.get("delete")!=null ;
// 这里当没有命令发出的时候，所有操作跳过
hasId = requestHt.get("id")!=null ;
id = 0 ;
if( requestHt.get("id")!=null )
id = Integer.parseInt( (String)requestHt.get("id") );
hasMasterId = requestHt.get("mid")!=null ;
masterId = 0 ;
if( requestHt.get("mid")!=null )
masterId = Integer.parseInt( (String)requestHt.get("mid") );
%>
<%
file://数据检查
%>
<%
file://检查表是否存在,如果没有,建5表, t_main , t, t_numeric, t_datetime, t_text
sql = "";
for(int i=0;i<5;i++){
String sTableName = globalTableName ; file://default
String sType = "varchar(255)"; file://default
if( i==1 )
{ sTableName = globalTableName + "_numeric" ; sType = "numeric(38,8)" ;}
else if( i==2 )
{ sTableName = globalTableName + "_datetime"; sType = "datetime"; }
else if( i==3 )
{ sTableName = globalTableName + "_text" ; sType = "text"; }
else if( i==4 )
{ sTableName = globalTableName + "_main" ; }
sql = sql +
" if not exists( select name from sysobjects \n"+
" where name ='"+ sTableName +"' and type='U' ) \n"+
" begin \n"+
" create table "+ sTableName +"( \n"+
" id int primary key \n"+
" , pid int not null \n"+
" , v "+ sType +" not null \n"+
" , k varchar(255) not null \n"+
" ) \n"+
" end \n"+
""+
" if not exists( select name from sysindexes \n"+
" where name like '%idx_"+ sTableName +"_pid%' ) \n"+
" begin \n"+
" create index idx_"+sTableName+"_pid on "+sTableName+"(pid) \n"+
" end \n"+
""+
" if not exists( select name from sysindexes \n"+
" where name like '%idx_"+ sTableName +"_k%' ) \n"+
" begin \n"+
" create index idx_"+sTableName+"_k on "+sTableName+"(k) \n"+
" end \n"+
"";
if( !sType.equals("text") ){
sql = sql +
" if not exists( select name from sysindexes \n"+
" where name like '%idx_"+ sTableName +"_v%' ) \n"+
" begin \n"+
" create index idx_"+sTableName+"_v on "+sTableName+"(v) \n"+
" end \n"+
"";
}
sql = sql + "";
} // end for create table
nt.executeUpdate(dbName,sql);
%>
----------------------------------------------------------------
所需文件：
ntGBDPUpload2-2.jsp
<%
file://修改
if( isEdit && hasId )
{
//...
file://检查是否存在
nt.executeQuery(dbName,
"select * from "+ globalTableName +"_main where id = "+id );
if( nt.rowCount <= 0 )
throw new Exception("修改"+ globalTableName +"出错：没有找到id号'"+ id +"'");
//
sql = ""+
" declare @i int \n"+
" declare @ntE int \n"+
" select @ntE=0 \n"+
" begin tran \n"+
" ";
file://加入额外需要在事务内执行的语句,共有3处加入, add, edit , delete
file://String sql_TRANS_ERROR = " if @@error<>0 set @ntE=@ntE+1 \n";
file://String sql_trans = "" ; file://用来插入后面的保存到数据库的sql语句中,使其中在事务之中间
if( sql_trans != null && !sql_trans.equals("") )
sql = sql + sql_trans + sql_TRANS_ERROR;
Enumeration er37 = requestHt.keys();
while (er37.hasMoreElements()) {
String s = ((String)er37.nextElement()).trim();
String sValue = ((String)requestHt.get(s)).trim();
if( sValue == null )
sValue = "";
sValue = nt.ntEncodeDB( sValue );
String sTableName = globalTableName ;
if( s.indexOf("numeric") == 0 )
{ sTableName = globalTableName + "_numeric" ; }
else if( s.indexOf("date") == 0 )
{ sTableName = globalTableName + "_datetime";
sValue = "'"+sValue+"'";
}
else if( s.indexOf("text") == 0 )
{ sTableName = globalTableName + "_text" ;
sValue = "'"+sValue+"'";
}
else
sValue = "'"+sValue+"'";
file://必须放在这里，因为只有修改和增加数值型字段才满足sValue.equals("")
if( sValue.equals("") )
continue;
if( s.equals("edit")
|| s.equals("add")
|| s.equals("delete")
|| s.equals("id")
|| s.toLowerCase().indexOf("submit") >= 0
|| s.toLowerCase().indexOf("nouse") >= 0
|| s.toLowerCase().indexOf("useless") >= 0
)
{}
else
{
sql = sql +
" if exists ( select * from "+ sTableName +" where pid= "+ id +" and k='"+ s +"'" +" ) \n"+
" begin \n"+
" update "+ sTableName +" set v = "+ sValue +" \n"+
" where pid= "+ id +" and k='"+ s +"' \n" +
" if @@error<>0 set @ntE=@ntE+1 \n"+
" end \n"+
" else \n"+
" begin \n"+
" select @i=@i "+
"";
if( !sValue.equals("") && !sValue.equals("''") )
sql = sql +
" select @i = ( select isNull(min(id),0)-1 from "+ sTableName +" ) \n"+
" if @i >= 0 select @i = -1 \n"+
" insert into "+ sTableName +" (id,pid,k,v) \n"+
" values( @i, "+ id + " \n"+
" , '"+ s +"', "+ sValue +") \n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
"";
sql = sql +
" "+
" end \n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
" ";
}
}//end while
sql = sql +
" if @ntE = 0 \n"+
" commit tran \n"+
" else \n"+
" begin \n"+
" rollback tran \n"+
" raiserror ('数据库执行出错! ',16,1) \n"+
" end \n"+
" ";
nt.executeUpdate( dbName,sql );
} // end if edit
%>
<%
file://将发文单添加保存入数据库
if( isAdd )
{ // 隔离局部变量
file://int rowNo = -9999;
file://int formNo = -9999;
file://nt.executeQuery(dbName,"select isNull(max(id),0)+1 from "+ globalTableName +"");
file://formNo = Integer.parseInt( nt.data[0][0] );
file://nt.executeQuery(dbName,"select isNull(min(id),0)-1 from "+ globalTableName +"");
file://rowNo = Integer.parseInt( nt.data[0][0] );
sql = ""+
" declare @ntE int \n"+
" declare @i int \n"+
" declare @formNo int \n"+
" select @ntE=0 \n"+
" begin tran \n"+
"";
file://加入额外需要在事务内执行的语句,共有3处加入, add, edit , delete
file://String sql_TRANS_ERROR = " if @@error<>0 set @ntE=@ntE+1 \n";
file://String sql_trans = "" ; file://用来插入后面的保存到数据库的sql语句中,使其中在事务之中间
if( sql_trans != null && !sql_trans.equals("") )
sql = sql + sql_trans + sql_TRANS_ERROR;
sql = sql +
" select @i = ( select isNull(max(id),0)+1 from "+ globalTableName +"_main ) \n"+
" select @formNo = @i \n"+
" insert into "+ globalTableName +"_main (id,pid,k,v) \n"+
" values( @i, "+ (hasMasterId?masterId:0) +", '"+ parentKey +"', '"+ parentValue +"') \n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
" ";
Enumeration er44 = requestHt.keys();
while (er44.hasMoreElements()) {
String s = ((String)er44.nextElement()).trim();
String sValue = ((String)requestHt.get(s));
if( sValue == null )
sValue = "";
sValue = sValue.trim();
if( sValue.equals("") )
continue;
sValue = nt.ntEncodeDB( sValue );
String sTableName = globalTableName ;
if( s.indexOf("numeric") == 0 )
{ sTableName = globalTableName + "_numeric" ; }
else if( s.indexOf("date") == 0 )
{ sTableName = globalTableName + "_datetime";
sValue = "'"+sValue+"'";
}
else if( s.indexOf("text") == 0 )
{ sTableName = globalTableName + "_text" ;
sValue = "'"+sValue+"'";
}
else
sValue = "'"+sValue+"'";
if(
s.equals("edit")
|| s.equals("add")
|| s.equals("delete")
|| s.equals("id")
|| s.toLowerCase().indexOf("submit") >= 0
|| s.toLowerCase().indexOf("nouse") >= 0
|| s.toLowerCase().indexOf("useless") >= 0
)
{}
else
{
sql = sql +
" select @i = ( select isNull(min(id),0)-1 from "+ sTableName +" ) \n"+
" if @i >= 0 select @i = -1 \n"+
" insert into "+ sTableName +" (id,pid,k,v) "+
" values( @i, @formNo , '"+ s +"', "+ sValue +") "+
" if @@error<>0 set @ntE=@ntE+1 "+
" ";
}
}//end while
sql = sql +
" if @ntE = 0 "+
" commit tran "+
" else "+
" begin "+
" rollback tran "+
" raiserror ('数据库执行出错!',16,1) "+
" end "+
" ";
nt.executeUpdate( dbName,sql );
} // 隔离局部变量
%>
<%
file://将pid 为 id 的删除
if( isDelete )
{ //
file://检查pid是否存在
nt.executeQuery(dbName,"select * from "+ globalTableName +"_main where id = "+id );
if( nt.rowCount <= 0 )
throw new Exception("删除"+ globalTableName +"出错：没有找到id号'"+ id +"'");
sql = ""+
" declare @ntE int \n"+
" declare @i int \n"+
" select @ntE=0 \n"+
" begin tran \n"+
"";
file://加入额外需要在事务内执行的语句,共有3处加入, add, edit , delete
file://String sql_TRANS_ERROR = " if @@error<>0 set @ntE=@ntE+1 \n";
file://String sql_trans = "" ; file://用来插入后面的保存到数据库的sql语句中,使其中在事务之中间
if( sql_trans != null && !sql_trans.equals("") )
sql = sql + sql_trans + sql_TRANS_ERROR;
sql = sql +
" delete from "+ globalTableName +" where pid = "+ id + "\n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
" delete from "+ globalTableName +"_numeric where pid = "+ id + "\n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
" delete from "+ globalTableName +"_datetime where pid = "+ id + "\n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
" delete from "+ globalTableName +"_text where pid = "+ id + "\n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
" delete from "+ globalTableName +"_main where id = "+ id + "\n"+
" if @@error<>0 set @ntE=@ntE+1 \n"+
" if @ntE = 0 \n"+
" commit tran \n"+
" else \n"+
" begin \n"+
" rollback tran \n"+
" raiserror ('数据库执行出错! ',16,1) \n"+
" end \n"+
"";
nt.executeUpdate(dbName, sql );
} // 隔离局部变量
%>
--------------------------------------------------------------
所需文件：
ntGBDPScript.jsp
<%--
GBDP方法通用模块
本单元没有采用javascript的数组,因为采用数组后速度非常慢
--%>
<%@page contentType="text/html;charset=GBK" %>
<%@page import="java.lang.*,java.net.*,java.sql.*,java.text.*,java.util.*" %>
<%@page import="dba.ntDB" %>
<%@page session="true" %>
<%@ page errorPage="error.jsp"%>
<% if( hasId && !isDelete && !isAdd )
{
%>
<script>
<%
ntDB ntSV = new ntDB();
ntDB ntSV1 = new ntDB();
ntDB ntSV2 = new ntDB();
ntDB ntSV3 = new ntDB();
ntSV.executeQuery(dbName,
" select * from "+ globalTableName +" where pid = "+ id +
"");
ntSV1.executeQuery(dbName,
" select * from "+ globalTableName +"_numeric where pid = "+ id +
"");
ntSV2.executeQuery(dbName,
" select * from "+ globalTableName +"_datetime where pid = "+ id +
"");
ntSV3.executeQuery(dbName,
" select * from "+ globalTableName +"_text where pid = "+ id +
"");
for(int i=0;i<ntSV.rowCount;i++)
{
%>
var k_<%= i%> = "<%= ntSV.data(i,"k") %>";
var v_<%= i%> = "<%= ntSV.ntEncodeSimple((ntSV.data(i,"v"))) %>";
<%
} // end for
for(int i=0;i<ntSV1.rowCount;i++)
{
String s = ntSV1.ntEncodeSimple((ntSV1.data(i,"v")));
String s_old = s;
//
try{
s = (new DecimalFormat("#0")).format(Double.parseDouble(s));
if( Double.parseDouble(s) == Double.parseDouble(s_old) )
;
else
s = ""+Double.parseDouble(s_old);
}catch(Exception e551055){
s = ""+Double.parseDouble(s_old);
}
%>
var k_<%= i + ntSV.rowCount %> = "<%= ntSV1.data(i,"k") %>";
var v_<%= i + ntSV.rowCount %> = "<%= s %>";
<%
} // end for
for(int i=0;i<ntSV2.rowCount;i++)
{
String s54 = ntSV2.ntEncodeSimple((ntSV2.data(i,"v",0,10)));
if( ntSV2.data(i,"k").indexOf("datetime") == 0 )
s54 = ntSV2.ntEncodeSimple((ntSV2.data(i,"v",0,19)));
%>
var k_<%= i + ntSV.rowCount + ntSV1.rowCount %> = "<%= ntSV2.data(i,"k") %>";
var v_<%= i + ntSV.rowCount + ntSV1.rowCount %> = "<%= s54 %>";
<%
} // end for
for(int i=0;i<ntSV3.rowCount;i++)
{
%>
var k_<%= i + ntSV.rowCount + ntSV1.rowCount + ntSV2.rowCount %> = "<%= ntSV3.data(i,"k") %>";
var v_<%= i + ntSV.rowCount + ntSV1.rowCount + ntSV2.rowCount %> = "<%= ntSV3.ntEncodeSimple((ntSV3.data(i,"v"))) %>";
<%
} // end for
%>
var ntLength = <%= ntSV.rowCount
+ ntSV1.rowCount
+ ntSV2.rowCount
+ ntSV3.rowCount %>;
for(var ntLoop=0;ntLoop<ntLength;ntLoop++)
{
file://try{
eval(" var k = k_"+ ntLoop +" ; ");
eval(" var v = v_"+ ntLoop +" ; ");
var x = document.all( eval("k_" + ntLoop) );
if( x == null )
continue;
if( x.type == "select-one" )
{
for(i=0;i<x.options.length;i++)
{
if( x.options[i].text == v || x.options[i].value == v )
{
x.selectedIndex = i;
break;
}
}
}
if( x.type == "checkbox" )
{
if( x.value == v )
{
x.checked = true;
}
}
if( x.type == "text" || x.type =="textarea" )
document.all( k ).value = v ;
if( x.length > 1 && x[0].type == "radio" )
{
for(i=0;i<x.length;i++)
{
if( x[i].value == v )
{
x[i].checked = true;
break;
}
}
}
if( x.type == "undefined" && x.length == 1 )
{
document.all( k ).value = v ;
}
if( x.type == "undefined" && x.length > 1 )
{
for(i=0;i<x.length;i++)
{
x[i].value = v ;
}
}
file://test
file://if( x.type == "file" )
file://{
// alert("has file type");
file://}
file://}catch(e){}
} // end loop
</script>
<% } // end if %> 
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