springmvc ajax map,ajax - Passing a Map<String,String> to a springMVC controller

博主在尝试使用Ajax向SpringMVC控制器发送HashMap或其他Map实现时遇到问题，错误信息提示无法将String类型转换为Map。在Ajax调用中，博主创建了一个包含键值对的对象并尝试发送，而在控制器端接收到的参数无法正确转换。问题可能出在数据类型转换上，需要找到适配的编辑器或转换策略。

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I am trying to send a HashMap or any other Map implementation from ajax to a Spring MVC controller

Here's the detail of how I do it :

the Ajax call is as follow

var tags = {};

tags["foo"] = "bar";

tags["whee"] = "whizzz";

$.post("doTestMap.do", {"tags" : tags }, function(data, textStatus, jqXHR) {

if (textStatus == 'success') {

//handle success

console.log("doTest returned " + data);

} else {

console.err("doTest returned " + data);

}

});

then on the controller side I have :

@RequestMapping(value="/publisher/doTestMap.do", method=RequestMethod.POST)

public @ResponseBody String doTestMap(@RequestParam(value = "tags", defaultValue = "") HashMap tags, HttpServletRequest request) { //

System.out.println(tags);

return "cool";

}

Unfortunately I systematically get

org.springframework.beans.ConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'java.util.Map'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [java.util.Map]: no matching editors or conversion strategy found

What am I doing wrong ?

Thank you.