如何使用 Spring MVC 在 post 方法中传递 List<String>？
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How to pass List<String> in post method using Spring MVC?
提问by user2359634
I need to pass a list of values in the request body of POSTmethod but I get 400: Bad Request error.
我需要在POST方法的请求正文中传递一个值列表，但我得到400: Bad Request error.
Below is my sample code:
下面是我的示例代码：
@RequestMapping(value = "/saveFruits", method = RequestMethod.POST,
consumes = "application/json")
@ResponseBody
public ResultObject saveFruits(@RequestBody List<String> fruits) {
...
}
The JSON I am using is: {"fruits":["apple","orange"]}
我使用的 JSON 是： {"fruits":["apple","orange"]}
回答by wcislo
You are using wrong JSON. In this case you should use JSON that looks like this:
您使用了错误的 JSON。在这种情况下，您应该使用如下所示的 JSON：
["orange", "apple"]
If you have to accept JSON in that form :
如果您必须接受该形式的 JSON：
{"fruits":["apple","orange"]}
You'll have to create wrapper object:
您必须创建包装对象：
public class FruitWrapper{
List<String> fruits;
//getter
//setter
}
and then your controller method should look like this:
然后你的控制器方法应该是这样的：
@RequestMapping(value = "/saveFruits", method = RequestMethod.POST,
consumes = "application/json")
@ResponseBody
public ResultObject saveFruits(@RequestBody FruitWrapper fruits){
...
}
回答by Mitesh Ukate
I had the same use case, You can change your method defination in the following way :
我有相同的用例，您可以通过以下方式更改方法定义：
@RequestMapping(value = "/saveFruits", method = RequestMethod.POST,
consumes = "application/json")
@ResponseBody
public ResultObject saveFruits(@RequestBody Map<String,List<String>> fruits) {
..
}
The only problem is it accepts any key in place of "fruits" but You can easily get rid of a wrapper if it is not big functionality.
唯一的问题是它接受任何键来代替“水果”，但是如果它不是很大的功能，您可以轻松摆脱包装器。
回答by Ganesh Bhattachan
You can pass input as ["apple","orange"]if you want to leave the method as it is.
您可以传递输入，就["apple","orange"]好像您想保留该方法一样。
It worked for me with a similar method signature.
它使用类似的方法签名对我有用。
