Not able to read value of map attribute in jsp

Ranch Hand

Posts: 63

posted 1 year ago

below is my controller class

package com.howtodoinjava.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.howtodoinjava.entity.VegetableEntity;
import com.howtodoinjava.service.VegetableManager;

@Controller
public class EditVegetableController {

@Autowired
	private VegetableManager vegetableManager;

public void setVegetableManager(VegetableManager vegetableManager) {
		this.vegetableManager = vegetableManager;
	}
	
	@RequestMapping(value = "/addveghome", method = RequestMethod.GET)
	public String listVegetables(ModelMap map) {
		
		map.addAttribute("veg", new VegetableEntity());
		map.addAttribute("Added","Added Successfully");
	
		return "vegetables";
	}
	@RequestMapping(value = "/addveg", method = RequestMethod.POST)
	public String addVegetables(@ModelAttribute(value = "veg") VegetableEntity veg,
			BindingResult result) {
		
		vegetableManager.addVegetable(veg);
		return "redirect:/addveghome";
	}
	
}

jsp

<%@taglib uri="http://www.springframework.org/tags" prefix="spring"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ 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>Add vegetables</title>
</head>
<body>
<form:form method="post" action="addveg" commandName="veg">
<table>
    <tr>
        <td>Name:</td>
        <td><form:input path="name"/></td>
    </tr>
    <tr>
        <td>Breed :</td>
        <td><form:input path="breed"/></td>
    </tr>
    <tr>
        <td>Amount :</td>
        <td><form:input path="amount"/></td>
    </tr>
    
    <tr>
        <td colspan="2">
            <input type="submit" value="<spring:message code="label.addveg" />"/>
        </td>
    </tr>
    </table>
    </form:form>
    <h1>{Added}</h1>
</body>
</html>

IN controller for Added variable I am assinging value as Added successfully but while trying to display in jsp its getting displayed as {Added}

let me know where I am missing

Tim Nachreiner

Ranch Hand

Posts: 71

posted 1 year ago

Just guessing, but I think it's because you used: instead of

somashaker goud

Ranch Hand

Posts: 63

posted 1 year ago

Tim, I tried that too but it didn't worked

Tim Nachreiner

Ranch Hand

Posts: 71

posted 1 year ago

how about

somashaker goud

Ranch Hand

Posts: 63

posted 1 year ago

Yup, it worked. Thanks

Tim Nachreiner

Ranch Hand

Posts: 71

posted 1 year ago

On another note, because you are using field injection:

You can get rid of this line:

somashaker goud

Ranch Hand

Posts: 63

posted 1 year ago

Thanks good catch

It is sorta covered in the JavaRanch Style Guide.

Not able to read value of map attribute in jsp

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