Question

我创建了一个多阶段表单来接受数据，然后将其提供给我的servlet。

HTML代码 - ＆gt;

<head>
<meta charset="UTF-8">
<title>Registration Form - Unity Bank</title>
<link rel="stylesheet" href="css/reset.css">
<link rel="stylesheet" href="css/style.css"> </head>

<body>
    <!-- multistep form -->
    <br>
    <p align="center">
    <img src="Images/logo.png" width="20%" height="20%"></p>
    <form action="submitInfo" method="post" id="msform" enctype="multipart/form-data">
        <!-- progressbar -->
        <ul id="progressbar">
            <li class="active">Account Setup</li>
            <li>Personal Details</li>
            <li>Personal Details - 2</li>
        </ul>
        <!-- fieldsets -->
        <fieldset>
            <h2 class="fs-title">Create your account</h2>
            <h3 class="fs-subtitle">Get your account credentials</h3>
            <input type="text" name="email" placeholder="Email" />
            <input type="password" name="pass" placeholder="Password" />
            <input type="password" name="cpass" placeholder="Confirm Password" />
            <input type="button" name="next" class="next action-button" value="Next" /> </fieldset>
        <fieldset>
            <h2 class="fs-title">Personal Details</h2>
            <h3 class="fs-subtitle">Enter details carefully !</h3>
            <input type="text" name="fname" placeholder="First Name" />
            <input type="text" name="lname" placeholder="Last Name" />
            <input type="text" name="phone" placeholder="Phone" />
            <textarea name="address" placeholder="Address"></textarea>
            <input type="text" name="country" placeholder="Country" />
            <input type="text" name="state" placeholder="State" />
            <input type="text" name="city" placeholder="City" />
            <input type="text" name="pin" placeholder="PIN" />
            <input type="button" name="previous" class="previous action-button" value="Previous" />
            <input type="button" name="next" class="next action-button" value="Next" /> </fieldset>
        <fieldset>
            <h2 class="fs-title">Personal Details - 2 </h2>
            <h3 class="fs-subtitle">Some more information please !</h3> <span>Male<input type="radio" name="sex" value="M" />
            Female<input type="radio" name="sex" value="F" /></span>
            <br><br>
            <span>Enter Date Of Birth</span><br><br>
            <input type="date" name="bday" />
            <span>Choose Profile Picture</span><br>
            <input type='file' onchange="readImage(this);" /> <img id="blah" src="#" alt="Profile Picture" />
            <br>
            <input type="button" name="previous" class="previous action-button" value="Previous" />
            <input type="submit" name="submit_form" class="submit action-button" value="Submit" /> </fieldset>
    </form>
    <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
    <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.3/jquery.easing.min.js'></script>
    <script src="js/index.js"></script>
</body>

CSS代码 - ＆gt;

/*custom font*/

@import url(http://fonts.googleapis.com/css?family=Montserrat);

/*basic reset*/

* {
    margin: 0;
    padding: 0;
}

html {
    height: 150%;
    /*Image only BG fallback*/
    /*background = gradient + image pattern combo*/
    background: linear-gradient(rgba(14, 137, 214, 0.6), rgba(127, 190, 8, 0.6));
}

body {
    font-family: montserrat, arial, verdana;
}

span {
    font-size: 14px;
    color: #1f476d;
}

/*form styles*/

#msform {
    width: 550px;
    margin: 50px auto;
    text-align: center;
    position: relative;
}

#msform fieldset {
    background: white;
    border: 0 none;
    border-radius: 3px;
    box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
    padding: 20px 30px;
    box-sizing: border-box;
    width: 80%;
    margin: 0 10%;
    /*stacking fieldsets above each other*/
    position: relative;
}


/*Hide all except first fieldset*/

#msform fieldset:not(:first-of-type) {
    display: none;
}


/*inputs*/

#msform input,
#msform textarea {
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 10px;
    margin-bottom: 10px;
    width: 100%;
    box-sizing: border-box;
    font-family: montserrat;
    color: #2C3E50;
    font-size: 13px;
}


/*buttons*/

#msform .action-button {
    width: 100px;
    background: #27AE60;
    font-weight: bold;
    color: white;
    border: 0 none;
    border-radius: 1px;
    cursor: pointer;
    padding: 10px 5px;
    margin: 10px 5px;
}

#msform .action-button:hover,
#msform .action-button:focus {
    box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;
}


/*headings*/

.fs-title {
    font-size: 15px;
    text-transform: uppercase;
    color: #2C3E50;
    margin-bottom: 10px;
}

.fs-subtitle {
    font-weight: normal;
    font-size: 11px;
    color: #666;
    margin-bottom: 20px;
}


/*progressbar*/

#progressbar {
    margin-bottom: 30px;
    overflow: hidden;
    /*CSS counters to number the steps*/
    counter-reset: step;
}

#progressbar li {
    list-style-type: none;
    color: white;
    text-transform: uppercase;
    font-size: 9px;
    width: 33.33%;
    float: left;
    position: relative;
}

#progressbar li:before {
    content: counter(step);
    counter-increment: step;
    width: 20px;
    line-height: 20px;
    display: block;
    font-size: 10px;
    color: #333;
    background: white;
    border-radius: 3px;
    margin: 0 auto 5px auto;
}


/*progressbar connectors*/

#progressbar li:after {
    content: '';
    width: 100%;
    height: 2px;
    background: white;
    position: absolute;
    left: -50%;
    top: 9px;
    z-index: -1;
    /*put it behind the numbers*/
}

#progressbar li:first-child:after {
    /*connector not needed before the first step*/
    content: none;
}


/*marking active/completed steps green*/


/*The number of the step and the connector before it = green*/

#progressbar li.active:before,
#progressbar li.active:after {
    background: #27AE60;
    color: white;
}

多阶段形式的JAVASCRIPT - ＆gt;

var current_fs, next_fs, previous_fs; //fieldsets
var left, opacity, scale; //fieldset properties which we will animate
var animating; //flag to prevent quick multi-click glitches
function readImage(input) {
    if (input.files && input.files[0]) {
        var reader = new FileReader();

        reader.onload = function (e) {
            $('#blah')
                .attr('src', e.target.result)
                .width(150)
                .height(200);
        };

        reader.readAsDataURL(input.files[0]);
    }
}
$(".next").click(function () {
    if (animating) return false;
    animating = true;
    current_fs = $(this).parent();
    next_fs = $(this).parent().next();
    //activate next step on progressbar using the index of next_fs
    $("#progressbar li").eq($("fieldset").index(next_fs)).addClass("active");
    //show the next fieldset
    next_fs.show();
    //hide the current fieldset with style
    current_fs.animate({
        opacity: 0
    }, {
        step: function (now, mx) {
            //as the opacity of current_fs reduces to 0 - stored in "now"
            //1. scale current_fs down to 80%
            scale = 1 - (1 - now) * 0.2;
            //2. bring next_fs from the right(50%)
            left = (now * 50) + "%";
            //3. increase opacity of next_fs to 1 as it moves in
            opacity = 1 - now;
            current_fs.css({
                'transform': 'scale(' + scale + ')'
                , 'position': 'absolute'
            });
            next_fs.css({
                'left': left
                , 'opacity': opacity
            });
        }
        , duration: 800
        , complete: function () {
            current_fs.hide();
            animating = false;
        }, //this comes from the custom easing plugin
        easing: 'easeInOutBack'
    });
});
$(".previous").click(function () {
    if (animating) return false;
    animating = true;
    current_fs = $(this).parent();
    previous_fs = $(this).parent().prev();
    //de-activate current step on progressbar
    $("#progressbar li").eq($("fieldset").index(current_fs)).removeClass("active");
    //show the previous fieldset
    previous_fs.show();
    //hide the current fieldset with style
    current_fs.animate({
        opacity: 0
    }, {
        step: function (now, mx) {
            //as the opacity of current_fs reduces to 0 - stored in "now"
            //1. scale previous_fs from 80% to 100%
            scale = 0.8 + (1 - now) * 0.2;
            //2. take current_fs to the right(50%) - from 0%
            left = ((1 - now) * 50) + "%";
            //3. increase opacity of previous_fs to 1 as it moves in
            opacity = 1 - now;
            current_fs.css({
                'left': left
            });
            previous_fs.css({
                'transform': 'scale(' + scale + ')'
                , 'opacity': opacity
            });
        }
        , duration: 800
        , complete: function () {
            current_fs.hide();
            animating = false;
        }, //this comes from the custom easing plugin
        easing: 'easeInOutBack'
    });
});

我刚刚在servlet的doPost方法中设置了一个简单的System.out.println（“Test”），用于调试目的。提交按钮不会触发servlet。我在一个非常基本的表单中使用了相同的servlet，它只包含一个文本输入和一个提交按钮，以查看它是否正常工作并且确实有效，因此它不是一个设置问题。

那么有人能指出代码中的任何错误吗？为什么不触发servlet？

Answer 1

这部分代码：

$(".submit").click(function () {
    return false;
})

阻止事件冒泡，这意味着该按钮未提交表单。

删除此return false;或整个功能（无论如何你都没有在这里做任何事情）。

Answer 2

问题：submit关键字。
这是name和id上的“保留”关键字。

<input type="submit" name="submit" class="submit action-button" value="Submit" />

将其更改为name="submit_btn"

见结果！

抱歉......我找不到我在48小时左右看过的那篇参考文献将重新回到这一点。

我参考了我所说的话：https://stackoverflow.com/a/876274/2159528

Answer 3

如果你的最后三行（在click的{{1}}处理程序中返回false）按照@AlexOliveira的建议删除（这是必需的！）并且它仍然不起作用，它可能是表格实际上已被调用，但您的文件尚未上传。

原因是，您的表单需要发送使用.submit编码的数据来发送文件上传内容：

multipart/form-data

Answer 4

您的代码无法上传文件并在提交时可以尝试使用此代码..！

private static final int MAX_MEMORY_SIZE = 1024 * 1024 * 50;
    private static final int MAX_REQUEST_SIZE = 1024 * 1024 * 50;

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
    {

        String fileName = null,filePath =null;
        // Check that we have a file upload request
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);

        if (!isMultipart) {
            return;
        }

        // Create a factory for disk-based file items
        DiskFileItemFactory factory = new DiskFileItemFactory();

        // Sets the size threshold beyond which files are written directly to
        // disk.
        factory.setSizeThreshold(MAX_MEMORY_SIZE);

        // Sets the directory used to temporarily store files that are larger
        // than the configured size threshold. We use temporary directory for
        // java
        factory.setRepository(new File(System.getProperty("java.io.tmpdir")));

        // constructs the folder where uploaded file will be stored
        //String uploadFolder = getServletContext().getRealPath("")
        //      + File.separator + DATA_DIRECTORY;

        // Create a new file upload handler
        ServletFileUpload upload = new ServletFileUpload(factory);

        // Set overall request size constraint
        upload.setSizeMax(MAX_REQUEST_SIZE);

        try {
            // Parse the request
            List items = upload.parseRequest(request);
            Iterator iter = items.iterator();
            while (iter.hasNext()) {
                FileItem item = (FileItem) iter.next();

                if (!item.isFormField()) {
                    fileName = new File(item.getName()).getName();
                    filePath = yourfilename.
                    vloc = filePath;
                    vname = fileName;
                    File uploadedFile = new File(filePath);
                    System.out.println(filePath);
                    // saves the file to upload directory
                    item.write(uploadedFile);
                }
            } 
        } catch (FileUploadException ex) {
            throw new ServletException(ex);
        } catch (Exception ex) {
            throw new ServletException(ex);
        }        
    }

HTML表单不提交

那么有人能指出代码中的任何错误吗？为什么不触发servlet？

4 个答案: