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Guys, I’m having a little bit of a problem, but it’s really pissing me off in a simple college exercise.

The intention is only to make a program that receives a quantity x and a value y, and multiply it. However, it is to use java methods, and also jsp..

I did everything right, but my methods are not taking the values typed in the textbox, can someone please help me?

Make a program that receives the quantity and value of three products in the following format: quantity1 value1 quantity2 value2 quantity3 Valor3. The program shall calculate these values in the following format::
TOTAL = Quantity1* Value1 + Quantity2 * value2 + Quantity3 * Value3.
Show sub-total and general total.

Follows codes:

HTML: 

<html>
    <head>
        <title>Exercicio 1 em jsp</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>

        <form name="frm"  action="calcularSoma.jsp" method="post">
            <table border="0" align="center" bordercolor="blue">
                <tr>
                    <td>
                        <b>Quantidade 1:</b>
                    </td>
                    <td>
                        <input type="text" name="txtQtd1" size="2" />  
                    </td>
                    <td>
                        <b>Valor 1:</b>
                    </td>
                    <td>
                        <input type="text" name="txtVlr1" size="2" />  
                    </td>

                </tr>
                <tr>
                    <td>
                        <b>Quantidade 2:</b>
                    </td>
                    <td>
                        <input type="text" name="txtQtd2" size="2" />  
                    </td>
                    <td>
                        <b>Valor 2:</b>
                    </td>
                    <td>
                        <input type="text" name="txtVlr2" size="2" />  
                    </td>

                </tr>
                <tr>
                    <td>
                        <b>Quantidade 3:</b>
                    </td>
                    <td>
                        <input type="text" name="txtQtd3" size="2" />  
                    </td>
                    <td>
                        <b>Valor 3:</b>
                    </td>
                    <td>
                        <input type="text" name="txtVlr3" size="2" />  
                    </td>


                </tr>
                <tr>
                    <td>
                       <input type="submit" value="Calcular" name="acao"> 
                    </td>
                    <td>
                        <input type="reset" value="Limpar">
                    </td>

                </tr>

            </table>
        </form> 
    </body>
</html>

JSP:

<%@page contentType="text/html" pageEncoding="UTF-8" errorPage="jspTrataErra.jsp"%>
<jsp:useBean id="objCalcularSub" class="packageJeanZika.somaTudo"/>
<jsp:setProperty name="objCalcularSub" property="*"/>
<!DOCTYPE html>
<html>

    <head>
        <title>Exercicio</title>
    </head>
    <body>
        <h3>Cálculo</h3>
        <%-- Apresentação dos dados via HTML --%>
        <pre>
           ---------- DADOS OBTIDOS DO BROWSER ---------------------
           Subtotal1 : <%=objCalcularSub.retornaValorSubTotal1()%>
           Subtotal2 : <%=objCalcularSub.retornaValorSubTotal2()%>
           Subtotal3 : <%=objCalcularSub.retornaValorSubTotal3()%>
           ---------------------------------------------------------
           Total geral: <%=objCalcularSub.retornaTotalGeral()%>
           <%-- Total Geral  <%=objSomaNum.RetTotal()%> --%>
           ---------------------------------------------------------
        </pre>
    </body>
</html>

Java: 

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author Jean Cunha
 */
package packageJeanZika;

public class somaTudo {

    private float txtVlr1 ;
    private float txtVlr2 ;
    private float txtVlr3 ;
    private int txtQtd1 ;
    private int txtQtd2 ;
    private int txtQtd3 ;

    public void setVlr1(float txtVlr1) {
        this.txtVlr1 = txtVlr1;
    }

    public void setVlr2(float txtVlr2) {
        this.txtVlr2 = txtVlr2;
    }

    public void setVlr3(float txtVlr3) {
        this.txtVlr3 = txtVlr3;
    }

    public void setQtde1(int txtQtd1) {
        this.txtQtd1 = txtQtd1;
    }

    public void setQtde2(int txtQtd2) {
        this.txtQtd2 = txtQtd2;
    }

    public void setQtde3(int txtQtd3) {
        this.txtQtd3 = txtQtd3;
    }

    public float retornaValorSubTotal1() {

        return txtQtd1 * txtVlr1;
    }

    public float retornaValorSubTotal2() {

        return txtQtd2 * txtVlr2;
    }

    public float retornaValorSubTotal3() {

        return txtQtd3 * txtVlr3;
    }

    public float retornaTotalGeral(){

        return retornaValorSubTotal1() + retornaValorSubTotal2() + retornaValorSubTotal3();
    }

}
java html jsp

1 answer

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If the input is called name="txtQtd1", your bean needs to have a method called setTxtQtd1 but in your code it’s called setQtde1. I saw that the field name in the class is correct txtQtd1, so it must be because you renamed the field and forgot to rename Setter. Some development environments rename getters/setters automatically and others do not...

Make the same correction for all fields that have names that do not match.

  • Marcus, good afternoon! Nas mosca!! That’s right, thank you very much!! SOLVED!

  • Glad you solved :-) Note: The site has a feature to mark the correct answer, a check mark (like this: ) next to the answer.

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