如何处理Spring中的json列表？

Question

我想将所有复选框ID和已检查的参数（1或0）作为json列表发送到server.I尝试和googled多次但无法得到任何结果。我得到语法上错误的错误

我的java代码：

@Autowired
 ParamService paramService;

 @RequestMapping(value = "/refresh", method = RequestMethod.POST, produces = "application/json", consumes = "application/json")
 public @ResponseBody String refreshModelParamRel(@RequestBody ParamWrapper pw) {
       System.out.println("params size"+pw.getParams().size());
 }

ParamWrapper：

public class ParamWrapper {

    private List<ParamDTO> params;
    private Integer modelId;

    public ParamWrapper() {
    }

    public List<ParamDTO> getParams() {
         return params;
    }

    public void setParams(List<ParamDTO> params) {
        this.params = params;
    }

    public Integer getModelId() {
        return modelId;
    }

    public void setModelId(Integer modelId) {
        this.modelId = modelId;
    }    
}

和我的json：

  function addModelParams() {

    var paramWrapper = {};

    paramWrapper["modelId"] = selectedModelId;

    var params = {};
    var allParams = $("input[name='param']");
    for (i = 0; i < allParams.length; i++) {
        var param = {};
        param["id"] = allParams[i].value;
        param["checked"] = allParams[i].checked;
        params[i] = param;
    }

    paramWrapper["params"] = params;

    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function ()
    {
        if (xhr.readyState == 4 && xhr.status == 200)
        { 
            alert(xhr.responseText);
        }
    }

    xhr.open("POST", "http://localhost:8080/ButelefonAPI/modelparams/refresh", true);
    xhr.setRequestHeader('Content-Type', 'application/json'); 
    xhr.send(JSON.stringify(paramWrapper));
}

在我发送的json数据中似乎一切正常：

{"modelId":13,"params":{"0":{"id":"1","checked":false},"1":{"id":"2","checked":false},"2":{"id":"3","checked":false},"3":{"id":"4","checked":false},"4":{"id":"5","checked":false},"5":{"id":"6","checked":false},"6":{"id":"7","checked":false},"7":{"id":"9","checked":false},"8":{"id":"10","checked":false},"9":{"id":"11","checked":false},"10":{"id":"12","checked":false},"11":{"id":"13","checked":false},"12":{"id":"14","checked":false},"13":{"id":"15","checked":false},"14":{"id":"16","checked":false},"15":{"id":"17","checked":false},"16":{"id":"21","checked":false}}} 

Answer 1

修改

好的，我认为语法问题在于您的params = {}对象应该是一个数组params = []而是 更改：     var paramWrapper = {};

var params = {};
var allParams = $("input[name='param']");
for (i = 0; i < allParams.length; i++) {
    var param = {};
    param["id"] = allParams[i].value;
    param["checked"] = allParams[i].checked;
    params[i] = param;
}
paramWrapper["params"] = params;

对此：

var paramWrapper = {};
var params = [];
var allParams = $("input[name='param']");
for (i = 0; i < allParams.length; i++) {
    var param = {};
    param["id"] = allParams[i].value;
    param["checked"] = allParams[i].checked;
    params[i] = param;//or params.push(param);
}
paramWrapper["params"] = params; 

我认为应该这样做。