在jQuery AJAX调用Spring控制器时找不到404错误

I am newbie in Spring. I generate the JSON like below:

我是春天的新手。我生成如下的JSON：

[
    {
        "customer" : "16", "project" : "19",
        "phase" : "47", "approver" : "5",
        "date1" : "", "date2" : "",
        "date3" : "", "date4" : "",
        "date5" : "", "date6" : "",
        "date7" : "", "activity" : "1"
    },

    {
        "customer" : "17", "project" : "20",
        "phase" : "48", "approver" : "3",
        "date1" : "", "date2" : "",
        "date3" : "", "date4" : "",
        "date5" : "", "date6" : "",
        "date7" : "", "activity" : "1"
    }
]

I am passed this JSON to my Spring controller:

我将此JSON传递给我的Spring控制器：

$.ajax({
    type: 'post',
    url: 'NewTimesheet',
    dataType : 'json',
    data: JSON.stringify(jsonObj),

    success: function(data) {
        console.log(data);
    }
});

I am mapped the request to controller like below:

我将请求映射到控制器，如下所示：

@RequestMapping(value="NewTimesheet", headers = { "Content-type=application/json" })
@ResponseBody
public String addNewTimesheet(@RequestBody List<Timesheet> timesheet,
    HttpSession session) {

    logger.info("timesheet list size is" + timesheet.size());
    return "success";
}

Timesheet class:

时间表类：

public class Timesheet {
    private String project;
    private String phase;
    private String approver;
    private String customer;
    private String date1;
    private String date2;
    private String date3;
    private String date4;
    private String date5;
    private String date6;
    private String date7;
    private String activity;

    //Getters and setters
}

But my request is not mapped with the conroller. My console displays like below:

但我的请求未与控制器映射。我的控制台显示如下：

WARN org.springframework.web.servlet.PageNotFound.handleNoSuchRequestHandlingMethod:142 - No matching handler method found for servlet request: path '/NewTimesheet', method 'POST', parameters map['[{"customer":"16","project":"19","phase":"47","approver":"5","date1":"","date2":"","date3":"","date4":"","date5":"","date6":"","date7":"","activity":"1"},{"customer":"17","project":"20","phase":"48","approver":"3","date1":"","date2":"","date3":"","date4":"","date5":"","date6":"","date7":"","activity":"1"}]' -> array['']]

WARN org.springframework.web.servlet.PageNotFound.handleNoSuchRequestHandlingMethod：142 - 找不到servlet请求的匹配处理程序方法：path'/ NewTimesheet'，方法'POST'，参数map ['[{“customer”：“16”，“项目 “：” 19" ， “相”： “47”， “批准”： “5”， “日期1”： “”， “日期2”： “”， “DATE3”： “”， “date4”： “” “date5”： “”， “date6”： “”， “date7”： “”， “活性”： “1”}，{ “顾客”： “17”， “项目”： “20”，“相“：” 48" ， “批准”： “3”， “日期1”： “”， “日期2”： “”， “DATE3”： “”， “date4”： “”， “date5”： “”，” date6“：”“，”date7“：”“，”activity“：”1“}]' - > array ['']]

How to map my JSON to controller? Any help will be greatly appreciated!!!

如何将我的JSON映射到控制器？任何帮助将不胜感激！！！

5 个解决方案

#1

You need to annotate the class as Controller, add a RequestMapping in your class and the HTTP method your calling in your method.

您需要将类注释为Controller，在类中添加RequestMapping，在方法中添加调用的HTTP方法。

@Controller
@RequestMapping("/NewTimesheet")
public class MyClassName {

        @RequestMapping(value={ "", "/" }, method = RequestMethod.POST, headers = { "Content-type=application/json" })
        @ResponseBody
        public String addNewTimesheet(@RequestBody List<Timesheet> timesheet,HttpSession session){
                 logger.info("timesheet list size is"+timesheet.size());
                 return "success";
        }
}

#2

Change @RequestBody to @ModelAttribute before the list in the controller. And in your json, put 'timesheet.' before every field, that is, timesheet.customer,timesheet.project.... such like that. That would work.

在控制器中的列表之前将@RequestBody更改为@ModelAttribute。在你的json中，放上'时间表'。在每个字段之前，即timesheet.customer，timesheet.project ....就像那样。那会有用。

#3

You need to define method=post. also I added produces = "application/json"

你需要定义method = post。我还添加了produce =“application / json”

@RequestMapping(value="NewTimesheet", method = RequestMethod.POST, produces = "application/json")
        @ResponseBody
        public String addNewTimesheet(@RequestBody List<Timesheet> timesheet,HttpSession session){
                 logger.info("timesheet list size is"+timesheet.size());
                 return "success";
        }

#4

A couple things that might be causing problems for you:

可能会给您带来问题的一些事情：

Make sure you have all of the necessary dependencies for Jackson. For Maven, this would be:

确保你拥有Jackson的所有必要依赖项。对于Maven，这将是：

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.2.2</version>
</dependency>

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.2.2</version>
</dependency>

You don't need to stringify your JavaScript object, this is done implicitly. You should also name your submitted variable, since it must map to the domain object:

您不需要对JavaScript对象进行字符串化，这是隐式完成的。您还应该为提交的变量命名，因为它必须映射到域对象：
```
$.ajax({
    method : 'post',
    url : 'NewTimesheet',
    dataType : 'json',
    data:{ 'timesheet': jsonObj },
    success : function(data) {
        console.log(data);

    }
});
```
Your controller should be configured to explicitly handle a POST request. Setting the accepted content type in the headers is not necessary. Also, I believe you need to map your domain objects to an array and not a list:

您的控制器应配置为显式处理POST请求。不需要在标题中设置接受的内容类型。另外，我认为您需要将域对象映射到数组而不是列表：
```
@RequestMapping(value="NewTimesheet", method = RequestMethod.POST)
public @ResponseBody String addNewTimesheet(@RequestParam("timesheet") Timesheet[] timesheet,HttpSession session){
         logger.info("timesheet list size is"+timesheet.length);
         return "success";
}
```

If you are using a relatively recent version of Spring MVC, there is no additional configuration required to handle requests for and producing JSON. Your AJAX request specifies a JSON response, which Spring will recognize and delegate to Jackson for serializing the input and output.

如果您使用的是相对较新版本的Spring MVC，则不需要其他配置来处理JSON的请求和生成JSON。您的AJAX请求指定了一个JSON响应，Spring将识别并委托给Jackson以序列化输入和输出。

#5

In my ajax request i added the contentType:application/json.After adding this controller mapped my ajax request.Thanks for all.

在我的ajax请求中，我添加了contentType：application / json.After添加此控制器映射了我的ajax请求。感谢所有。

#1