如何使用Spring MVC将多个值从表单传递给控制器​​？ [英] How to pass multiple values from the form to a controller using Spring MVC?

问题描述

我正在使用Spring MVC模式，我正在尝试创建一个类似于此的JSP文件 -

I am working with Spring MVC pattern and I am trying to make a JSP file which is like this as of now -

在表单中，我有四行，第一行仅用于标记和其他三行我需要将我的数据放在文本框中。例如 - 对于DC1，我将在文本框中插入 numServers 值，我将在文本框中插入 ipaddress 值主机名文本框中的值。

In the form, I have four rows, first row is just for labelling and other three rows I need to put my data in the text box. For example- for DC1, I will insert numServers value in the textbox, I will insert ipaddress value in the textbox and hostname value in the textbox.

<form method="post" enctype="multipart/form-data">
    <table>
        <tr>
            <td>Datacenter Name</td>
            <td>Number of Servers</td>
            <td>IP Address(comma separated)</td>
            <td>Host Name(comma separated)</td>
        </tr>
        <tr>
            <td><label for="dc1">DC1</label></td>
            <td><input type="text" name="numservers" size="20"></td>
            <td><input type="text" name="ipaddress" size="60"></td>             
            <td><input type="text" name="hostname"  size="60"></td>
        </tr>
        <tr>
            <td><label for="dc1">DC2</label></td>
            <td><input type="text" name="numservers" size="20"></td>
            <td><input type="text" name="ipaddress" size="60"></td>             
            <td><input type="text" name="hostname"  size="60"></td>
        </tr>
        <tr>
            <td><label for="dc1">DC3</label></td>
            <td><input type="text" name="numservers" size="20"></td>
            <td><input type="text" name="ipaddress" size="60"></td>             
            <td><input type="text" name="hostname"  size="60"></td>
        </tr>
        <tr><td colspan="2">&nbsp;</td></tr>
    </table>
    <input type="submit">
</form>

现在我应该在点击提交按钮后阅读这些值，因为我将输入必要的值文本框。我在下面的代码中使用 RequestMapping -

Now I am supposed to read these values after hitting the submit button as I will be typing necessary values in the textbox. I am using RequestMapping in my below code -

@RequestMapping(value = "test", method = RequestMethod.GET)
public HashMap<String, String> testRequest(@RequestParam MultiValueMap<?, ?> allRequestParams) {

}

最初，我使用的是 MultiValueMap ，但我不确定我的上述输入标准是如何适合这个的？一般来说，我不确定如何在上述用例的上述方法中构造输入，以便我可以在方法中轻松提取所有值？

Initially, I was using MultiValueMap but I am not sure how my above input criteria will fit into this? In general, I am not sure how do I structure my input in the above method for the above use case so that I can extract all the values easily in the method?

这是我第一次开始使用Spring MVC，因此遇到了一些困难..

This is the first time I started working with Spring MVC so having some difficulties..

推荐答案

您可以将数组传递给spring控制器如下所示：

You can pass an array to spring controller like below:

  @RequestMapping(value = "test", method = RequestMethod.GET)
    public HashMap<String, String> testRequest(@RequestParam String[] numservers, @RequestParam String[] ipaddress, @RequestParam String[] hostname) {
    //By using array position you can determine each row
    //DC1 values
    String dc1_numServer = numservers[0];
    String dc1_ipaddres= ipaddress[0];
    String dc1_hostname= hostname[0];
    //DC2 values
    String dc2_numServer = numservers[1];
    String dc2_ipaddres= ipaddress[1];
    String dc2_hostname= hostname[1];
    //DC3 values
    String dc3_numServer = numservers[2];
    String dc3_ipaddres= ipaddress[2];
    String dc3_hostname= hostname[2];
    }

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