I have a String type of array in my java bean and i want to get it in my Java Server Page. But when i am using get property on my page it's giving me null. Can anybody suggest a solution for this?
1 Answer
I think you are trying to access bean property without setting its value through setter method. And a better method to access bean and its property is jsp expression language as shown in below example.
JSP Code:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
Names are : ${namesBean.names[0]} ${namesBean.names[1]}
</body>
</html>
If I access this jsp page directly from http://localhost:8080/sof/main.jsp url at this time namesBean is not initialized and out out will be
Names are :
And if I forward request to this jsp page through a servlet using http://12.0.0.1:8080/sof/SampleServlet where It is initialized namesBean then its value will be displayed on page.
Bean Code:
package sample;
public class SampleBean {
public String[] names;
public String[] getNames() {
return names;
}
public void setNames(String[] names) {
this.names = names;
}
}
Servlet Code:
package sample;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SampleServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
SampleBean sampleBean = new SampleBean();
sampleBean.setNames(new String[]{"Aamir", "Latif"});
request.setAttribute("namesBean", sampleBean);
RequestDispatcher rd = request.getRequestDispatcher("main.jsp");
rd.forward(request, response);
}
}
Servlet Mapping:
<servlet>
<description></description>
<display-name>SampleServlet</display-name>
<servlet-name>SampleServlet</servlet-name>
<servlet-class>sample.SampleServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>SampleServlet</servlet-name>
<url-pattern>/SampleServlet</url-pattern>
</servlet-mapping>
Then output will be
Names are : Aamir Latif
One more better approach is to use JSTL
1 Comment
user3440622
I have initialized the array from database so there's no need for setter method.