Spring MVC page Validation code sample

Verification Code class:

Import java.io.IOException;

Import javax.servlet.ServletException;

Import Javax.servlet.http.HttpServlet;

Import Javax.servlet.http.HttpServletRequest;

Import Javax.servlet.http.HttpServletResponse;

Import javax.servlet.http.HttpSession;

public class Verifycodeservlet extends HttpServlet {

Private static final long serialversionuid = 1L;

Public Verifycodeservlet () {

Super ();

}

protected void doget (HttpServletRequest request, httpservletresponse response)

Throws Servletexception, IOException {

DoPost (request, response);

}

protected void DoPost (HttpServletRequest request, HttpServletResponse resp) throws Servletexception, IOException {

Disable image caching so that you can click the captcha to refresh the captcha picture

String randsource[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "Q", "W", "E", "R", "T", "Y", "U",

"I", "O", "P", "a", "s", "D", "F", "G", "H", "J", "K", "Z", "X", "C", "V", "B", "N", "M"};

String randstr = "";

HttpSession session = Request.getsession ();//Get a Session object

Resp.setheader ("Pragma", "NoCache");

Resp.setheader ("Cache-control", "No-cache");

Resp.setdateheader ("Expires", 0);

Resp.setcontenttype ("Image/jpeg");

Createimagecode Vcode = new Createimagecode (100, 30, 5, 10);

Session.setattribute ("Verifycodefind", Vcode.getcode ());

Vcode.write (Resp.getoutputstream ());

}

}

JSP page:

<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "pageencoding=" UTF-8 "%>

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">

<title>sf</title>

<form id= "FormData" method= "post" action= "${pagecontext.request.contextpath}/save" >

<label><span> name </span>

<input id= "UName" type= "text" name= "UserName"/>

</label>

<label><span> Verification Code </span>

<input type= "text" style= "width:100px;height:30px" name= "Yzm" id= "Yzm" tabindex= "3" datatype= "Limit" min= "1" msg= " Verification code cannot be empty "class=" I-text "/>

style=" vertical-align:middle; margin:0px; cursor:pointer "title=" Click Change Verification Code border= 0/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

<input type= "button" value= "Confirm Commit" class= "tj-btn" id= "TJ" >

</form>

<script type= "Text/javascript" >

$ (' #tj '). Click (function () {

$.ajax ({

Type: ' POST ',

URL: ' ${pagecontext.request.contextpath}/save ',

Data: $ (' #formData '). Serialize (),

DataType: ' JSON ',

Success:function (data) {

if (data.result==1) {

$ (' #formData ') [0].reset ();

$ (' #changecode '). attr (' src ', '/sf/verifycodeservlet?. Tmp= ' + math.random ());

Alert (' Submit success ');

}else{

$ (' #changecode '). Click ();

alert (data.errormessage);

    }

},

DataType: ' JSON '

            })

});

$ (' #changecode '). Click (function () {

$ (this). attr (' src ', '/sf/verifycodeservlet?. Tmp= ' + math.random ());

$ (' #yzm '). Focus (). Val (');

});

</script>

</body>

Control layer:

@Controller

@RequestMapping ("/SF")

public class Sfcontroller {

@RequestMapping (value = "/save", method = Requestmethod.post)

@ResponseBody

Public Baseajaxresponse Save (DTO dto,httpservletrequest request, String Yzm) {

Baseajaxresponse res = new Baseajaxresponse ();

if (Stringutils.isblank (Yzm)) {

Res.seterrormessage ("Verification code cannot be empty");

return res;

}else if (!yzm.tolowercase (). Equals (Request.getsession (). getattribute ("Verifycodefind"))) {

Res.seterrormessage ("Captcha error");

return res;

}else{

Request.getsession (). SetAttribute ("Verifycodefind", "" ");

try {

This.checkedBaggageDamageService.saveOrUpdate (DTO, request);

Res.setresult (1);

} catch (Exception e) {

E.printstacktrace ();

Res.seterrormessage (E.getmessage ());

}

}

return res;

}

}

Spring MVC page Validation code sample