将下拉值从 jsp 作为参数传递到 Rest 控制器

Question

我有一个HTML文件，其中有货币下拉列表。所选货币的值应传递给控制器，控制器检索当前对特定货币的汇率，例如：欧元兑美元。

如何将下拉值传递给 java 控制器。

网页代码：

<form action="/currencyRate?currencyVal=currency" id="currency">
        <input type="submit" value="Submit">
    </form>
    <select name="currencyVal" form="currency">
        <option value="USD">USD</option>
        <option value="INR">INR</option>
        <option value="EUR">EUR</option>
        <option value="GBP">GBP</option>
        <option value="AED">AED</option>
    </select>

其余控制器方法

@RequestMapping(value="/currencyRate", method=RequestMethod.GET)  
    public ModelAndView getCurrencyRate(@ModelAttribute String currency) {
        ModelAndView modelAndView = new ModelAndView();         
        double  currencyRate = 0; 
// does the exchange rate retrieval task. 
        currencyRate  = getCurrencyRateDetail(currency); 
        modelAndView.addObject("currencyRate", currencyRate);   
        modelAndView.setViewName("result");
        return modelAndView;
    }

如何将所选值传递给控制器方法？任何帮助都会非常有帮助。

我也是这个方法，但我它显示"没有消息">

@RequestMapping(value="/currencyRate/{currency}", method=RequestMethod.GET)  
    public ModelAndView getCurrencyRate(@PathVariable String currency) {
        ModelAndView modelAndView = new ModelAndView();         
        double  currencyRate = 0; 
        currencyRate  = getCurrencyRateDetail(currency);
        modelAndView.addObject("currencyRate", currencyRate);   
        modelAndView.setViewName("result");
        return modelAndView;
    }

Answer 1

@RequestMapping(value="/currencyRate/{currency}", method=RequestMethod.GET) public ModelAndView getCurrencyRate(@PathVariable String currency) { ModelAndView modelAndView = new ModelAndView(); double currencyRate = 0; currencyRate = getCurrencyRateDetail(currency); modelAndView.addObject("currencyRate", currencyRate); modelAndView.setViewName("result"); return modelAndView; }