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2: Success.jsp contents are as follows
<% @ Page ContentType = "text / html; charset = GB2312"%>
error </ title></p>
<p><meta http-equiv = "content-type" content = "text / html; charSet = GB2312"></p>
<p></ hEAD></p>
<p><body></p>
<p><h1> <font color = green> Success !! </ font> </ h1></p>
<p><form mothod = "post" action = "login.jsp"></p>
<p><Input Type = "Submit" name = "submit" value = "Return"></p>
<p></ form></p>
<p></ body></p>
<p></ html></p>
<p>3: Error.jsp content is as follows</p>
<p><% @ Page ContentType = "text / html; charset = GB2312"%></p>
<p><html></p>
<p><HEAD></p>
<p><title> error </ title></p>
<p></ hEAD></p>
<p><body></p>
<p><h1> <font color = red> error !! You did not enter your username, password </ font> </ h1> <form mothod = "post" action = "login.jsp"></p>
<p><Input Type = "Submit" name = "submit" value = "Return"></p>
<p></ form></p>
<p></ body></p>
<p></ html></p>
<p>Built newly built your project in Eclipe, also named GiveYou (put your source file (.java) in Mythree --- javasource, put your class file (.class) in Mythree --- Web- Inf --- Classes inside), don't forget to import servlet.jar</p>
<p>Write a class TEST, the content is as follows:</p>
<p>Import java.io. *;</p>
<p>Import javax.servlet. *;</p>
<p>Import javax.servlet.http. *;</p>
<p>Public Class Test Extends Httpservlet</p>
<p>{</p>
<p>Private string Userid, Password;</p>
<p>Public void dopost (httpservletRequest RQ,</p>
<p>HTTPSERVLETRESPONSE RP)</p>
<p>THROWS IOEXCEPTION, ServletException</p>
<p>{</p>
<p>Rp.setContentType ("text / html; charSet = GB2312");</p>
<p>PrintWriter out = rp.getwriter ();</p>
<p>Userid = RQ.GetParameter ("UserName");</p>
<p>Password = rq.getParameter ("password");</p>
<p>IF ((Userid! = null) && (Password! = null))</p>
<p>{</p>
<p>rp.sendredirect ("/ GiveYou / Success.jsp");</p>
<p>}</p>
<p>Else</p>
<p>{</p>
<p>rp.sendredirect ("/ GiveYou / Error.jsp");</p>
<p>}</p>
<p>}</p>
<p>}</p>
<p>Since Web.xml is the same as Mythree, I don't say it here.</p>
<p>Please launch your Tomcat again</p>
<p>Enter: in your IE address bar:</p>
<p>Http: // localhost: 8080 / giveyou /login.jsp</p>
<p>This chapter is written in this chapter: When you come here, you must have been very impatient, think that my "no nonsense" became "nonsense,", ", my brother, my brother, to the above example, do you think you are not You can write it slightly more complicated, slightly beautiful, don't let the page are so pale, don't let the text always have such a sigh, do dozens of classes, call each other, in dopost () Write a conditional statement, jump to different page interviews according to different values obtained, I believe that your program will never be so lonely.</p></div><div class="text-center mt-3 text-grey">
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