Java 来自 json 的 Spring mvc RequestMapping
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Spring mvc RequestMapping from json
提问by user2862639
I'm having trouble creating the appropriate RequestParams for the following Json String:
我在为以下 Json 字符串创建适当的 RequestParams 时遇到问题：
{
"input": [
{
"personAdres": {
"plaats": "Amsterdam",
"straat": "Grietenstraat",
"huisnummer": "12",
"postcode": "4512UN""
},
"interesses": [
"gas_station",
"soccer"
]
},
{
"personAdres": {
"plaats": "Arnhem",
"straat": "Koningsweg",
"huisnummer": "3",
"postcode": "1953AA"
},
"interesses": [
"gas_station",
"soccer"
]
}
]
}
I tried the following:
我尝试了以下方法：
@RequestMapping(method = RequestMethod.GET, params = {"input", "personAdres", "plaats", "straat", "huisnummer", "postcode", "interesses"})
public
@ResponseBody`enter code here`
String getMovie(
@RequestParam(value = "input") String[] input,
@RequestParam(value = "personAdres") String[] personAdres,
@RequestParam(value = "plaats") String plaats,
@RequestParam(value = "straat") String straat,
@RequestParam(value = "huisnummer") String huisnummer,
@RequestParam(value = "postcode") String postcode,
@RequestParam(value = "interesses")String[] interesses,
ModelMap model
)
That doens't seem to work. I'm getting the following error.
那似乎行不通。我收到以下错误。
No matching handler method found for servlet request:
找不到与 servlet 请求匹配的处理程序方法：
Can anyone help me out to create the right requestParams.
任何人都可以帮助我创建正确的 requestParams。
Edit: this seems to work
编辑：这似乎有效
@Controller
@RequestMapping("/dateSuggestie")
public class DateController {
@RequestMapping(method = RequestMethod.GET)
public
@ResponseBody
String getMovie(
@RequestParam(value = "input[0][personAdres][plaats]") String p0Plaats,
@RequestParam(value = "input[0][personAdres][straat]") String p0Straat,
@RequestParam(value = "input[0][personAdres][huisnummer]") String p0HuisNummer,
@RequestParam(value = "input[0][personAdres][postcode]") String p0PostCode,
@RequestParam(value = "input[0][interesses][]") String[] p0Interesses,
@RequestParam(value = "input[1][personAdres][plaats]") String p1Plaats,
@RequestParam(value = "input[1][personAdres][straat]") String p1Straat,
@RequestParam(value = "input[1][personAdres][huisnummer]") String p1HuisNummer,
@RequestParam(value = "input[1][personAdres][postcode]") String p1PostCode,
@RequestParam(value = "input[1][interesses][]") String[] p1Interesses) {
采纳答案by M. Deinum
You are sending JSON to your controller not request parameters. @RequestParamand @ModelAttributeonly work when data is submitted as request parameters.
您将 JSON 发送到您的控制器而不是请求参数。@RequestParam并且@ModelAttribute仅在数据作为请求参数提交时才有效。
Your JSON is send to the controller as the request body. For this spring has the @RequestBodyannotation. In general you don't want to parse the body yourself but use a framework to do the heavy lifting for you. For this purpose libraries like Hymansonexist.
您的 JSON 作为请求正文发送到控制器。对于这个春天有@RequestBody注解。一般来说，您不想自己解析身体，而是使用框架来为您完成繁重的工作。为此目的，存在像Hymanson这样的库。
These frameworks also integrate with Spring as one can read in the reference guide.
这些框架还与 Spring 集成，可以在参考指南中阅读。
You need to construct an object which is a Java representation of your JSON so that Hymanson can do the conversion. You can then rewrite your controller method to something like this
您需要构造一个对象，它是您的 JSON 的 Java 表示，以便 Hymanson 可以进行转换。然后，您可以将控制器方法重写为这样的
@RequestMapping(method = RequestMethod.GET)
@ResponseBody
public String getMovie(@RequestBody YourObject) { ... }
回答by Ernestas Kardzys
Personally I love Hymanson library - it helps mapping JSON object to/from Java's POJO.
我个人喜欢 Hymanson 库 - 它有助于将 JSON 对象映射到/从 Java 的 POJO。
Take a look at MKYONG's tutorial: http://www.mkyong.com/spring-mvc/spring-3-mvc-and-json-example/(download ZIP with project). Or take a look at this thread: Parsing JSON in Spring MVC using Hymanson JSON
看看 MKYONG 的教程：http://www.mkyong.com/spring-mvc/spring-3-mvc-and-json-example/ （下载带有项目的 ZIP）。或者看看这个线程：Parsing JSON in Spring MVC using Hymanson JSON
