Spring MVC-来自JDBC的JSON响应-根据请求“不可接受”；接受；标题_Json_Spring_Jsp

Spring MVC-来自JDBC的JSON响应-根据请求“不可接受”；接受；标题

json spring jsp

Spring MVC-来自JDBC的JSON响应-根据请求“不可接受”；接受；标题,json,spring,jsp,Json,Spring,Jsp,我发现以下错误，想知道如何解决： The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers. 我已附加控制器代码和JSP视图以呈现数据库调用的结果：控制器： @Controller public class JsonController

我发现以下错误，想知道如何解决：

 The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.

我已附加控制器代码和JSP视图以呈现数据库调用的结果：

控制器：

@Controller
public class JsonController {

    private static final String EMPLOYEE_DROP_DOWN = "employeeRequest";
    @Autowired
    EmployeeDAO employeeDAO;
    @Autowired
    EmployeeDAOImpl employeeDAOImpl;
    @Autowired
    ApplicationContext context;

    @RequestMapping(value = "/employees/json/dropdown.htm", method = RequestMethod.GET, headers = "Accept=application/xml, application/json", produces = {
            "application/json", "application/xml" })
    public String getEmployeeDropDown(Map<String, Object> model) {
        Employee employees = new Employee();
        model.put("employees", employees);

        List<String> employeeList = new ArrayList<String>();

        List<Employee> details = employeeDAO.getEmployeeRelationshipList();
        for (Employee record : details) {
            employeeList.add(record.getLastName());
        }
        model.put("employeeList", employeeList);

        return EMPLOYEE_DROP_DOWN;
    }


    @RequestMapping(value="/employees/json/data.htm", method = RequestMethod.GET, produces = "application/json")
    public @ResponseBody Employee post( @ModelAttribute Employee employees) {
        System.out.println(employees.getFirstName() + " " + employees.getLastName());
        return employees;
    }

}

例如：我在表单字段中输入的表单给了我一个错误。

您正在执行一个

POST

，这对于表单提交是正确的，但是控制器只响应

GET

。此外，您的api也是一团糟——文件扩展名意味着html响应，但您试图只返回json或xml。代码的其余部分也很混乱——但您还没有问过这一点。

您是如何提出请求的？您是否正确指定了accept标头？您正在执行一个

POST

，这对于表单提交是正确的，但是控制器只响应一个

GET

。此外，您的api也很混乱——文件扩展名意味着html响应，但您试图只返回json或xml。不确定代码是否混乱。但是getEmployeeDropDown方法从数据库中获取下拉列表的数据。在表单字段中，如您所见，我有一个输入字段，我可以在下拉列表中手动输入。因此，我在这一点上的问题是：如何改进这段代码，并从下拉列表中获取lastName和手动输入firtname的JSON响应？谢谢你的回复。

<%@ include file="/WEB-INF/views/includes/taglibs.jsp" %>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <%-- for responsive side --%>
    <script src="<c:url value="../../resources/js/bootstrap.js" />"></script>

    <title>Employee Information</title>
    <!--[if IE]>
    <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
</head>

<body>
<div class="container">
    <p align="center">Please choose the last name and provide the corresponding first name...</p>
    <form:form method="GET" action="/spring-jdbc/employees/json/data.htm" modelAttribute="employees">
        <table align="center" cellpadding="10">
            <tr>
                <td>Employee Last Name:</td>
                <td>
                    <form:select path="lastName">
                        <form:option value="NONE" label=" select the employee last name "/>
                        <form:options items="${employeeList}"/>
                    </form:select>
                </td>
            </tr>
            <tr>
                <td>Employee First Name:</td>
                <td>
                    <form:input type="text" path="firstName"/>
                </td>
            </tr>
            <td>
                <input type="submit" value="Save Changes"/>
            </td>
        </table>
    </form:form>
</div>

<script>
    $(document).ready(function(){
        sendAjax();
    });

    function sendAjax(){
        $.ajax({
            url: "/spring-jdbc/employees/json/data.htm",
            type: 'POST',
            dataType: 'json',
            data: "{\"First Name\": \""+lastName+"\", \"Last Name\": \""+firstName+"\"}",
            mimeTypes: 'application/json',
            contentType: 'application/json',
            success: function(data){
                alert(data.firstName + " " + data.lastName);
            },
            error:function(data, status, er){
                alert("error: "+data+" status: "+status+" er:"+er);
            }
        });
    }
</script>
</body>
</html>

data: {
"First Name": name,
"Last Name": name
}