为什么ajax方法调用错误函数?

时间:2016-04-05 15:14:58

标签: javascript java jquery ajax servlets

我有jquery脚本,它向servlet发送ajax请求。它工作,它将文本数据正确地发送到servlet ,但随后它调用错误函数,而不是成功函数(我检查过,servlet发送回ajax not null 字符串)。

为什么ajax方法调用错误函数?

这里的脚本代码

    $(document).ready(function () {
        $("#login-button").click(function () {
            var userPassword = $("input#userPassword").val();
            var userLogin = $("input#userLogin").val();
            $.ajax({
                type: "POST",
                url: "http://localhost:8181/library/login",
                data: {login: userLogin, password: userPassword},
                dataType: "text",
                success: function (data) {
                    if (data == "1") {
                        document.location.href = "http://localhost:8181/library/workshop.html";
                    }
                    if (data == "2") {
                        document.location.href = "http://localhost:8181/library/library.html";
                    }
                },
                error: function (jqXHR, textStatus, errorThrown) {
                    alert("Error report\n" + "jqXHR = " + jqXHR + "\n" + "textStatus = " + textStatus + "\n" +
                            "errorThrown =  " + errorThrown);
                }
            });
        });
    });

这里的servlet代码

    public class LoginServlet extends HttpServlet {

@Override
public void service(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    PrintWriter out = response.getWriter();
    String login = request.getParameter("login");
    String password = request.getParameter("password");
    SocketConnection.output.println("log_in " + login + " " + password);
    out.print(SocketConnection.input.readLine());
    out.close();
        }

    }

textStatus值为error,错误报告中的errorThrown值为void。

1 个答案:

答案 0 :(得分:0)

如果它返回状态200 您的函数包含以下设置

dataType: "text",

可能没有发送文字。只是尝试删除此设置,我希望它能正常工作