java - Accepting SQL Query in JSP Form -


what using: postgresql, netbeans, tomcat server, , jsp , html

to avoid question duplicate ia mtrying explain cleary :):

i connect jdbc driver database uni few tables. trying if user enters query in form 

 please enter query: ...............

like 

select * student

or 

select distinct student.name student natural join transcript join professor using (pid) professor.name = 'artem';

or

select semester, year, count(distinct cid) numberofcourses transcript group ..., ...

if user entered query should print out result. here stuck , not sure how implement java

if want can add code post. accessing database jsp

string query = request.getparameter("query"); if(query!=null && !"".equals(query)) {         connection con = new dbconnection().getconnection();         statement st = con.createstatement();         resultset rs = st.executequery(query);          resultsetmetadata rsmd = rs.getmetadata();         int  totalcolumn = rsmd.getcolumncount();           out.println("<table border='1' style='border-collapse:collapse'>");         out.println("<tr>");          for(int i=1;i<=totalcolumn;i++)         {             string columnname = rsmd.getcolumnname(i);             out.println("<th>"+columnname+"</th>");         }         out.println("</tr>");          while(rs.next())         {                 out.println("<tr>");             for(int col=1;col<=totalcolumn;col++)             {                             object obj= rs.getobject(col);                                     out.println("<td>"+ string.valueof(obj) +"</td>");             }              out.println("</tr>");         }         out.println("</table>"); }

Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod...
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based ...
Read more

ios - Change Storyboard View using Seague -

i have following code checks connection server, , depending on want change views if no connection found. nsstring *connect = [nsstring stringwithcontentsofurl:[nsurl urlwithstring:@"http://myserver.com"] encoding:nsutf8stringencoding error:nil]; if (connect == null) { [self performseguewithidentifier:@"network_failure" sender:self]; } else { // other code here } my problem not change views. have added storyboard segue between 2 views identifier of network_failure . not have navigation controller or that, problem? thanks help! no not problem. first of all, in objectivec exists nil object oriented null . must use that. so: if(connect == nil) or better: if(!connect) so due fact nil not same of null , probably code does't enter in if scope . you have been able discover breakpoint. anyway: be sure set trigger segue (line) 2 view controller , , name network_failure (that not best name. should instead view1toview2 ) as, m...
Read more