How to pass an Array from a Class to a JSP File
Question
This is where I create my Array:
public class Main {
public void main() {
String[] CartaV={"A","K","Q","J","T","9","8","7","6","5","4","3","2"};
String[] CartaP={"S","H","C","D"};
String[] m = new String[7];
Random rand1 = new Random();
Random rand2 = new Random();
for(int i=0;i<7;i++){
m[i]=CartaV[rand1.nextInt(13)];
m[i]=m[i]+CartaP[rand2.nextInt(4)];
}
//System.out.println(mc.mejorJugada(m));
}
}
And here I got my JSP File, as you can see, I'm importing the class, but still can't find a way to print the Array:
<%@page import="bootcamp.e003.dos.Main"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Mano7</title>
</head>
<body>
<%
//I want to print on screen my array
for(int i=0;i<6;i++){
out.println(m[i]);
}
%>
</body>
</html>
2 answers
solution1
1 2018-03-26 19:31:06
You can accomplish this using Request Attributes !
First, set your Attribute in your Servlet class, like so:
request.setAttribute("testing","testvalue"); //Pass your array here
Then in your view JSP file, you can access it like this:
String testValue = (String) request.getAttribute("testing");
if(testValue != null) {
System.out.println("Test Value.... "+testValue);
}
solution2
1 ACCPTED 2018-03-26 19:50:51
Currently you're not invoking your main() method in the Main class.
Also you're not returning any value or using any means of sharing variables.
What you could do is change the signature to something like this:
public String[] main() {
// Code here
return m;
}
Then in your jsp invoke the method like this:
<%
String m[] = (new Main()).main();
for(int i=0;i<6;i++){
out.println(m[i]);
}
%>
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