Question

我正在做Spring MVC的演示。我创建了内部带有数据主体的ajax调用发布请求，但是Spring似乎无法识别我的请求及其参数（返回状态415）。它甚至无法调用我的控制器。

var jsonSTr = JSON.stringify(products);
var data = {};
data["products"] = jsonSTr;

$.ajax({
    type: "POST",
    url: urlReq, --> "/mastercard/render"
    data: JSON.stringify(data),
    beforeSend: function (xhr) {
           xhr.setRequestHeader("Accept", "application/json");
           xhr.setRequestHeader("Content-Type", "application/json");
    },
   }).done(function (data, textStatus, jqXHR) {
                    console.log(textStatus);
});

这是我的 java代码

@RequestMapping(value="/mastercard/render", method = RequestMethod.POST,produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public ModelAndView renderToMasterCardForm(@RequestBody CheckoutRenderRequest checkoutRenderRequest) {
    List<Product> paidProducts = this.jsonToListProduct(checkoutRenderRequest.getProducts());

    ModelAndView viewModel = new ModelAndView("mastercardform");
    Response response = new Response();
    response.status = "ok";
    response.url = "mastercardform";
    response.price = String.valueOf(paidProducts.parallelStream().collect(Collectors.summarizingDouble(Product::getPrice)).getSum());
    ;
    viewModel.addObject("result", response);
    return viewModel;
 }

CheckoutRequest 类

private static class CheckoutRenderRequest {
    private String products;

    public String getProducts() {
        return products;
    }

    public void setProducts(String products) {
        this.products = products;
    }
}

我曾经尝试过如此糟糕的解决方案，但它仍然无法正常工作。这些站点https://www.javacodegeeks.com/2013/09/spring-mvc-ajax-jquery.html，POST JSON fails with 415 Unsupported media type, Spring 3 mvc，http://www.mkyong.com/spring-mvc/spring-4-mvc-ajax-hello-world-example/引用了我的代码，但它们没有帮助。我真的不知道我在做什么错，请帮忙。

Answer 1

变量数据不通过JSON.stringify转换，只需使用它即可。

var data = {products: JSON.stringify(xx)}；
$.ajax({
    data: data，
    url: xx
 })；

Answer 2

我测试了您的代码，它可以正常工作。

我的ajxa（与您相同）

var jsonSTr = JSON.stringify({"ddd":"sss", "der":"fvgb"});
    var data = {};
    data["products"] = jsonSTr;

    $.ajax({
        type: "POST",
        url: '/mastercard/render',
    data: JSON.stringify(data),
        beforeSend: function (xhr) {
        xhr.setRequestHeader("Accept", "application/json");
        xhr.setRequestHeader("Content-Type", "application/json");
    },
    }).done(function (data, textStatus, jqXHR) {
        console.log(textStatus);
    });

我的控制器（与您的控制器相同，只是为了测试而改变了返回值）

@RequestMapping(value="/mastercard/render", method = RequestMethod.POST,produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public ModelAndView renderToMasterCardForm(@RequestBody CheckoutRenderRequest checkoutRenderRequest) {
        System.out.println(checkoutRenderRequest.getProducts());

        ModelAndView viewModel = new ModelAndView("mastercardform");

        viewModel.addObject("result", "Hi");
        return viewModel;
    }

我的实体（与您相同，但将私有静态类更改为public）：

public class CheckoutRenderRequest {
    private String products;

    public String getProducts() {
        return products;
    }

    public void setProducts(String products) {
        this.products = products;
    }
}

我的完全控制者：

@Controller
@RequestMapping(value = "/")
public class Test {

    @RequestMapping(value = "/")
    public String index() {
        return "index";
    }

    @RequestMapping(value="/mastercard/render", method = RequestMethod.POST,produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public ModelAndView renderToMasterCardForm(@RequestBody CheckoutRenderRequest checkoutRenderRequest) {
        System.out.println(checkoutRenderRequest.getProducts());

        ModelAndView viewModel = new ModelAndView("mastercardform");

        viewModel.addObject("result", "Hi");
        return viewModel;
    }
}

然后我在index.jsp页面中调用了您的ajax

Answer 3

增加依赖性

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.8</version>
</dependency>

尝试检查您的spring mvc配置是否注册了json转换器

<mvc:annotation-driven>
<mvc:message-converters register- defaults="true">
<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>application/json</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>

Spring MVC Ajax调用Post请求正文，出现415错误

3 个答案: