java 将 JSON 数组发布到 Spring Boot RestController
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Post a JSON Array into Spring Boot RestController
提问by orrymr
I am posting something like this:
我正在发布这样的内容：
{
"stuff": [
{
"thingId": 1,
"thingNumber": "abc",
"countryCode": "ZA"
},
{
"thingId": 2,
"thingNumber": "xyz",
"countryCode": "US"
}
]
}
I can retrieve the data in the controller as follows:
我可以按如下方式检索控制器中的数据：
@RequestMapping(value = "/stuffs", method = RequestMethod.POST)
public String invoices(@RequestBody Map<String, List <Stuff>> stuffs) {
return "Hooray";
}
What I'd really like to do is to only pass in a List of Stuff into the controller; ie:
我真正想做的是只将一个 List of Stuff 传入控制器；IE：
@RequestMapping(value = "/stuffs", method = RequestMethod.POST)
public String invoices(@RequestBody List <Stuff> stuffs) {
return "I'm sad that this won't work.";
}
However, Hymanson does not like this. The error I get is the following:
然而，Hyman逊并不喜欢这样。我得到的错误如下：
Could not read JSON document: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token\n at [Source: java.io.PushbackInputStream@2a30a2f4; line: 1, column: 1]; nested exception is com.fasterxml.Hymanson.databind.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token\n at [Source: java.io.PushbackInputStream@2a30a2f4; line: 1, column: 1]
无法读取 JSON 文档：无法从 START_OBJECT 令牌中反序列化 java.util.ArrayList 的实例\n 在 [来源：java.io.PushbackInputStream@2a30a2f4; 行：1，列：1]；嵌套异常是 com.fasterxml.Hymanson.databind.JsonMappingException：无法从 START_OBJECT 令牌中反序列化 java.util.ArrayList 的实例\n 在 [来源：java.io.PushbackInputStream@2a30a2f4; 行：1，列：1]
I cannot send in the following (since it's not valid JSON):
我无法发送以下内容（因为它不是有效的 JSON）：
{
[
{
"thingId": 1,
"thingNumber": "abc",
"countryCode": "ZA"
},
{
"thingId": 2,
"thingNumber": "xyz",
"countryCode": "US"
}
]
}
I am sure that this is something simple, but I cannot distil an answer from my StackOverflow and Google searches.
我确信这很简单，但我无法从我的 StackOverflow 和 Google 搜索中提取答案。
Any help would be appreciated! :)
任何帮助，将不胜感激！:)
回答by Amer Qarabsa
you only need to send this without the curly brackets
你只需要在没有大括号的情况下发送这个
[
{
"thingId": 1,
"thingNumber": "abc",
"countryCode": "ZA"
},
{
"thingId": 2,
"thingNumber": "xyz",
"countryCode": "US"
}
]
In your controller when you tell Hymanson that it should be parsing a list it should be a list not an object containing a list
在你的控制器中，当你告诉Hyman逊它应该解析一个列表时，它应该是一个列表而不是一个包含列表的对象
回答by S. Pan
Note that if you're trying to get an array of JSON without a Java Class (the Class being "Stuff" in the OP's question) you will need to set up the Spring Boot Controller like this:
请注意，如果您尝试获取没有 Java 类的 JSON 数组（OP 问题中的类是“Stuff”），您将需要像这样设置 Spring Boot 控制器：
@RequestMapping(value = "/stuffs", method = RequestMethod.POST)
public String invoices(@RequestBody Map<String, Object> [] stuffs) {
return "Hooray";
}
