尝试使用 AJAX 发布 JSON 并接收 400

Question

我正在向 Tomcat 7 服务器发送 AJAX 请求，并且不断收到“错误请求”响应。我一直在使用 Chrome 和 FireFox 在 NetBeans 和 Eclipse 中进行调试。该请求似乎没有到达 Web 应用程序。我已经使用两种不同的 Web 工具捕获并验证了 JSON，并使用正在创建的请求对象仔细检查了所有变量名称。我是调试 Tomcat 的新手，非常感谢任何帮助。我的javascript代码如下：

function submitScoring(selected, dataSource) {
    if (!validate()) {
        alert("Please complete the highlighted fields.");
        return false;
    }

    var documents = getDocuments($("#table-available").dataTable(), selected);

    var request = {
        "database": dataSource,
        "userName": $("#userName").val(),
        "modelName": $("#modelName").val(),
        "documents": documents
    };

    sendRequest(request, "scoring");
}

function getDocuments(srcTable, areSelected) {
    var documents = new Array();

    if (areSelected) {
        srcTable.$("tr.selected").each(function () {
            documents.push(getDocument(this));
        });
    } else {
        srcTable.$("tr").each(function () {
            documents.push(getDocument(this));
        });
    }
    return documents;
}

function getDocument(row) {
    return {
        "metadata": {
            "id": row.cells[0].textContent,
            "title": row.cells[1].textContent,
            "language": row.cells[2].textContent,
            "format": row.cells[3].textContent
        },
        "lastUpdated": row.cells[4].textContent,
        "documentUri": row.cells[5].textContent
    };
}

function sendRequest(request, type) {
    var json = JSON.stringify(request);

    $.ajax({
        url: $appRoot + "/submit/" + type,
        dataType: "json",
        type: "POST",
        contentType: "application/json",
        data: json,
        success: function (data, textStatus) {
            alert("Your " + type + " job request was submitted successfully.");
        },
        error: function (xhr, textStatus, errorThrown) {
            alert('request failed ' + errorThrown);
        }
    });
}

编辑：Spring MVC 也参与其中，控制器的摘录代码如下：

@ResponseStatus(value = HttpStatus.OK)
@RequestMapping(value = "/scoring", method = RequestMethod.POST)
public @ResponseBody Map<String, String> submitDocsToScore(@RequestBody ScoringRequest jsonRequest, HttpServletRequest request, HttpServletResponse response)
        throws InvalidFormatException, AccumuloException, AccumuloSecurityException, IOException, TableNotFoundException, Docx4JException,
        ShutdownSignalException, ConsumerCancelledException, InterruptedException, org.json.simple.parser.ParseException {

    ralInterface.makeRequest(jsonRequest);

    return new HashMap<String, String>();
}

编辑 2：我之前说过我已经仔细检查过，但让我在这里也发布相关代码：

public abstract class Request { 
    protected String database; 
    protected String userName; 
    protected String modelName; 
    // getters and setters follow 
}

public class ScoringRequest extends Request { 
    private List<Document> documents; 
    // getters and setters follow 
}

public class Document implements Serializable {
    private Map<String, String> metadata;
    private String documentUri;
    private Date lastUpdated;
    // getters and setters follow
}

Answer 1

正如 Sudhansu Choudhary 指出的，当从 getDocument 函数返回时，我需要使用实际的 Date 对象而不是 String。