Question

我一直在努力将Jquery ajax发布数据作为@RequestBody发布到Spring控制器中。

我能够发送JSON字符串并捕获控制器中的JSON字符串。但是，无法将jQuery字符串从jquery ajax发送到控制器[无法转换为Object]。

以下是代码段：

# these are the variables we want to (ie are able to) extract from the movie object
metadata = ('title', 'rating', 'genre', "plot", "language", "runtime", "year", "color", "country" , "votes")
#creates dataframe with variable name headers
df = pd.DataFrame(np.random.randn(250, len(metadata)), columns=metadata) 

#these are all different data types, including lists, this makes it compile
df = df.astype('object')
#populate df with movie objects
for i in range(250):
    for j in metadata:
        df.loc[i, j] = movies_list[i].get(j)

# convert to the right data types:
metadata_dict_dtypes = {"title": unicode,
                        "rating": float,
                        "genre":list,
                        "plot": str,
                        "language":list,
                        "runtime":list,
                        "year":int,
                        "color":list,
                        "country":list ,
                        "votes":int}
for colname, my_dtype in metadata_dict_dtypes.iteritems():
    df[colname] = df[colname].astype(my_dtype)

// responseObject初始化：

 **Ajax Call:**   


          function postLoad(){
                $.ajax({
                    type : 'POST',
                    url : "ajaxhai.do",
                    contentType : "application/json",
                    cache : false,
                    data : responseObject, **//json-String**
                    dataType :"html",
                    success : function(data, textStatus) {
                        console.log("POST success");
                        $("#ajaxContent").html(data);
                    },
                    error : function(request, status, error) {
                        console.log("failed" + error);
                    }
                });
            }

我在pom中也有杰克逊依赖：

            <c:if test='${not empty ajitems}'>
                var responseObject = JSON.stringify('${ajitems}');
            </c:if>  
   // ${ajitems}--> is the model attribute and setting it in javascript to //send it back to controller through ajax call

    //Controller:
    @RequestMapping(value = "ajaxhai.do", method = RequestMethod.POST,consumes="application/json") **//unable to convert to requestBody**
        public  String testAjaxPost(@RequestBody AjaxDto[] ajaxRes, Model model,
                HttpServletRequest request, HttpServletResponse response) {

            System.out.println(ajaxRes);

            return "ajaxform";
        }

总是说：

<dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.7.3</version>
        </dependency>

但是当我按照以下方式更改控制器时，它就像魅力一样：

jquery-3.2.1.min.js:4 POST http://localhost:8080/testSpringmvc-1.0/ajaxhai.do 400 (Bad Request)

我在这里失踪的是什么？我已经尝试了自动json转换的所有可能性仍然没有运气。

感谢任何帮助。

谢谢。

Answer 1

当你期待控制器中的阵列时，请检查你想要发送的json。 json有问题。同时检查您是否已注册MappingJackson2HttpMessageConverter我认为您应该已经注册了。

<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="objectMapper">
            <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean"
                  p:autoDetectFields="false"
                  p:autoDetectGettersSetters="false"
                  p:failOnEmptyBeans="false"
                  p:indentOutput="true">
            </bean>
        </property>
    </bean>

这是一个很好的例子。 Ajax请求

var requestObject = [{"product_Name":"One Product","descripction":"Essentials","category":null,"price":"100.00","mfg_Date":null,"image":null},
    {"product_Name":"two Product","descripction":"Essentials 2","category":null,"price":"120.00","mfg_Date":null,"image":null}];
    $.ajax({
            type : 'POST',
            url : "services/product",
            cache : false,
            contentType:"application/json;charset=utf-8",
            data : JSON.stringify(requestObject),//json-String**
            dataType :"application/json;charset=utf-8",
            success : function(data, textStatus) {
                console.log("POST success"+data);
               /* $("#ajaxContent").html(data);*/
            },
            error : function(request, status, error) {
                console.log("failed" + error);
            }
        });

这是接受此请求的控制器。

@RequestMapping(value = "/product",produces = {MediaType.APPLICATION_JSON_UTF8_VALUE},
            method = RequestMethod.POST,
            consumes = {MediaType.APPLICATION_JSON_UTF8_VALUE})
    public @ResponseBody
    ResponseEntity<List<Product>> createProduct(@RequestBody  Product[] products) {
        return new ResponseEntity<List<Product>>(Arrays.asList(products), HttpStatus.OK);
    }

Spring Controller和Jquery Ajax无法将Json字符串转换为Object

1 个答案: