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作者:climbenet
applet文件 =========================== import java.applet.applet; import java.awt.*; import java.awt.event.*; import java.net.*; import java.io.*;
public class sendapplet extends applet implements actionlistener { label sendlable; label messageinfo; button sendbutton; textfield sendtext; textfield messagetext; urlconnection connect; string message; url chaturl; public string getappletinfo() { return "this is a applet--servlet"; }
public synchronized void init() { super.init(); resize(500,300); sendlable=new label("please enter massage"); messageinfo=new label("what you hava send:"); sendtext=new textfield(40); sendbutton=new button("send"); messagetext=new textfield(40); messagetext.seteditable(false); //
// panel mainp=new panel(); gridbaglayout gbl=new gridbaglayout(); gridbagconstraints gbc=new gridbagconstraints(); gbc.weightx=0; gbc.weighty=0; gbc.gridy=0; gbc.gridx=0; gbc.gridwidth=10; gbc.gridheight=1; gbc.anchor=gridbagconstraints.center; gbc.fill=gridbagconstraints.none; mainp.setlayout(gbl); gbl.setconstraints(sendlable,gbc); mainp.add(sendlable); gbc.gridy=1; gbc.gridwidth=9; gbc.fill=gridbagconstraints.horizontal; gbl.setconstraints(sendtext,gbc); mainp.add(sendtext); gbc.gridx=9; gbc.gridwidth=1; gbc.fill=gridbagconstraints.none; gbl.setconstraints(sendbutton,gbc); mainp.add(sendbutton); gbc.gridx=0; gbc.gridy=2; gbc.gridwidth=10; gbl.setconstraints(messageinfo,gbc); mainp.add(messageinfo); gbc.gridy=3; gbc.weighty=100; gbc.gridheight=10; gbc.fill=gridbagconstraints.both; gbl.setconstraints(messagetext,gbc); mainp.add(messagetext); sendbutton.addactionlistener(this); //构造的panel加入到applet中 setlayout(new borderlayout()); add("center",mainp); chaturl=getcodebase(); } public synchronized void start() { } public synchronized void stop() { } public synchronized void destroy() { }
// private void send() { message=sendtext.gettext(); sendtext.settext(""); //showstatus("message send!"); p("message send!"); messagetext.settext("message"); string querystring="/servlet/receive?message"+urlencoder.encode(message); p("attemping to send :"+message); try{ connect=(new url(chaturl,querystring)).openconnection(); showstatus("open connection!"); connect.setdefaultusecaches(false); connect.setusecaches(false); connect.setdoinput(true); connect.setdooutput(false); connect.connect(); p("make connection to "+connect); showstatus("open sream!"); datainputstream in=new datainputstream(connect.getinputstream()); showstatus("reading"); message=in.readline(); while(message!=null) { messagetext.settext(message); message=in.readline();
}//end while
}//end try catch(malformedurlexception e2) { system.err.println("malformedurlexception:"+e2.tostring());
}//end catch catch(ioexception e1) { system.err.println(e1.tostring());
}
}//end send
public void actionperformed(actionevent e) { if(e.getsource()==sendbutton) { send();
}
}
private void p(string debug) { messagetext.settext(debug); //system.out.println("app-servlet:"+debug);
}
}
servlet文件 =========================== import java.io.*; import java.util.date; import javax.servlet.*; import javax.servlet.http.*; public void riceive extends httpservlet { public void service(httpservletrequest req,httpservletresponse res) throws servletexception,ioexception { res.setcontentype("text/plain"); servletoutputstream out=res.getoutputstream(); out.print("recive user message:"); out.print(req.getparameter("message"));
}//end service
}//end receive
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