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一种新的思路（上）：
难得糊涂编程法 GBDP （适用、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，表自动生成，记录自动增加， 修改，删除，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GBDP功能示例：
无须建表，不用关心表结构、字段、值，保存全部自动化， 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 ) -- 和MS支持varchar到4000-8000 因为的varchar(255)是最大长度。写入数据库和读出数据到script使用了
ntEncodeSimple和ntEncode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,形式由自动处理,
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： 局变量定义在ntGBDPDefine.jsp中 globalTableName = "xxx"; // 将自动生成此表，并建立提高速度 parentKey = "文章发布"; parentValue = ""; dbName = "myDB"; is = true; // 如果需要上传，指定为true %> if( isPost ){ out.println(""); return; }%>…… 网页部分开始……
form表单
RM name="formSend" method="post" enctype="multipart/form-data" action="" οnsubmit="return checkOnSubmit()" >交互元件:
GBDP确认钮 ，ok , 确定, 所有页面统一使用type="submit" name=""id隐含，所有页面统一使用，用于自动载入相关记录
" value="" >删除显示 修改页面显示“删除”按钮，用hasId判断
删 除 …… 网页部分结束……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 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意：本JSP被其他页面，不能产生额外的空格和回车
局变量定义
String globalTableName ; String parentKey ="" ; String parentValue ="" ; String dbName = "e"; ntDB ntP = new ntDB(); ntDB nt = new ntDB(); String sql ; String sql_trans = "" ; 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 对路径 String realPath ; // like 'c:a' { realPath = getConfig().getServletContext().getRealPath(""); } 动文件上传目录指定 String uploadDir; { uploadDir = realPath + "upload"; }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 .NET.*,java.sql.*,java.text.*,java.util.*" %>dba.ntDB" %>传文件
if( isUpload && isPost ){ java.io.File mydir=new java.io.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(); { 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 ilename =""; for(int i=0;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") );%>
据检查
%>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 ; String sType = "varchar(255)"; 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 syss 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改
if( isEdit && hasId ) { //... 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"+ " "; 入额外需要在事务内的语句,共有3处加入, add, edit , delete sql_TRANS_ERROR = " if @@error<>0 set @ntE=@ntE+1 n"; sql_trans = "" ; 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+"'"; 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%>发文单添加保存入数据库
if( isAdd ) { // 隔离局部变量 rowNo = -9999; formNo = -9999; (dbName,"select isNull(max(id),0)+1 from "+ globalTableName +""); = Integer.parseInt( nt.data[0][0] ); (dbName,"select isNull(min(id),0)-1 from "+ globalTableName +""); = 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"+ ""; 入额外需要在事务内执行的语句,共有3处加入, add, edit , delete sql_TRANS_ERROR = " if @@error<>0 set @ntE=@ntE+1 n"; sql_trans = "" ; 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
%>pid 为 id 的删除
if( isDelete ) { // 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"+ ""; 入额外需要在事务内执行的语句,共有3处加入, add, edit , delete sql_TRANS_ERROR = " if @@error<>0 set @ntE=@ntE+1 n"; sql_trans = "" ; 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.jspGBDP方法通用模块
本单元没有采用的数组,因为采用数组后速度非常慢 --%>{
%>
for(int i=0;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 { %> 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 ntL=0;ntLoop { { 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 { 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 { 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[i].value = v ; } } ( x.type == "file" ) // alert("has file type"); catch(e){} } // end loop来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/10748419/viewspace-1008728/，如需转载，请注明出处，否则将追究法律责任。
转载于:http://blog.itpub.net/10748419/viewspace-1008728/