如何将Javascript数组传递给Spring控制器类

我创建了JS数组并尝试将该数组传递给Controller类，但它显示了

NullPointerException

我通过FireBug检查了URL，在那里，值正在传递，但在控制器类中，如果我尝试检索，它将显示NULL

JavaScript代码：

var deleteWidgetId = new Array(); //array created 
deleteWidgetId[0] = "a";//adding values 
deleteWidgetId[1] = "b"; 
//action trigged 
$("#saveLayout").load("layout/saveLayout.action", 
 { deleteWidgetId : deleteWidgetId },      
 function(response, status, xhr) { });

Java代码（在控制器类中）：

---

尝试使用

List

而不是

String[]

您必须在注释中指定请求参数的名称：

@RequestMapping(value = "/saveLayout")
public ModelAndView saveLayout(@RequestParam(value="deleteWidgetId") String[] deleteWidgetId) throws Exception { 
    //here that if i try to use the deleteWidgetId it is giving null pointer exception
}

---

JavaScript代码：var deleteWidgetId=new Array（）//创建的数组deleteWidgetId[0]=“a”//添加值deleteWidgetId[0]=“b”//操作触发$（“#saveLayout”）.load（“layout/saveLayout.action”{deleteWidgetId:deleteWidgetId}，函数（响应，状态，xhr）{}）；Java代码：（在控制器类中）@RequestMapping（value=“/saveLayout”）public ModelAndView saveLayout（@RequestParam String[]deleteWidgetId）引发异常{//这里，如果我尝试使用deleteWidgetId，它将给出空指针异常}我尝试使用该列表执行此操作，但它仍然显示deleteWidgetIdTry的Null，以便将deleteWidgetId js变量重命名为deleteWidgetIdValues

@RequestMapping(value = "/saveLayout")
public ModelAndView saveLayout(@RequestParam(value="deleteWidgetId") String[] deleteWidgetId) throws Exception { 
    //here that if i try to use the deleteWidgetId it is giving null pointer exception
}