如何将javascript变量传递给Spring mvc控制器

Question

var countrySelection = "Country Selection List:\n\n";
       for (var i = 0; i < frm.selectedCountryItems.length; i++)
          if (frm.selectedCountryItems[i].checked){
              countrySelection = countrySelection + frm.selectedCountryItems[i].value + "\n";
          }

       alert(countrySelection);

我想将countrySelection值传递给controller

Answer 1

您需要将此变量作为参数从POST/GET请求传递给controller并在controller中访问它，如：

@RequestMapping(...)
public String getCountySelected(@RequestParam(value = "UR_PARAM_NAME") String param){
   ... code goes here
}

编辑：如果您不使用ajax，并且希望在提交表单时发送额外的参数：

在form domain类中添加带有@transient注释的变量，这样spring就不会查找与数据库表匹配的元素。

@Transient
private String countrySelection;
//Setter getter methods

<form:hidden path="countrySelection"/>