Spring MVC，反序列化单个JSON？ [英] Spring MVC, deserialize single JSON?

问题描述

如何轻松分离在同一请求中发送的JSON值？

How can I easily separate JSON values that are sent in the same request?

鉴于我将JSON发布到我的服务器：

Given that I POST a JSON to my server:

{"first":"A","second":"B"}

如果我在Controller中实现以下方法：

If I implement the following method in the Controller:

@RequestMapping(value = "/path", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
public void handleRequest(@RequestBody String input) { 
    // ...
}

然后输入参数将构成一个整个字符串JSON对象， {first：A，second：B} 。我真正想要的是两个单独的字符串（或一个适合特定请求的字符串和一个int），只有两个值（客户端可能发送的其他键/值对应该被忽略）。

then the input parameter will constitute a String with the entire JSON object, {"first":"A","second":"B"}. What I really want is two separate Strings (or a String and an int whichever is suitable for the particular request) with just the two values (other key / value pairs that the client may send should be ignored).

如果字符串是作为请求参数而不是JSON请求体发送的，那么这很简单：

If the strings were sent as request parameters instead of JSON request body it would be simple:

@RequestMapping(value = "/path", method = RequestMethod.POST)
public void handleRequest(@RequestParam("first") String first, 
                          @RequestParam("second") String second) { 
    // ...
}

I知道我可以创建一个简单的bean类，它可以与 @RequestBody 注释一起使用，它将包含 A 和 B 使用时，但它似乎是绕道而行，因为它们在网络应用程序中会有不同的用途。

I know that I can create a simple bean class that can be used in conjunction with the @RequestBody annotation that will contain both A and B when used, but it seems like a detour, since they will have different purposes inside the web app.

依赖关系：
org.springframework：spring-web：3.1.0.RELEASE
org.codehaus.jackson：jackson-mapper-asl：1.9.3

Dependencies: org.springframework : spring-web : 3.1.0.RELEASE org.codehaus.jackson : jackson-mapper-asl : 1.9.3

推荐答案

POJO

POJO

public class Input {
    private String first;
    private String second;

    //getters/setters
}

...然后：

public void handleRequest(@RequestBody Input input)

在这种情况下，您需要在CLASSPATH上提供 Jackson 。

In this case you need Jackson to be available on the CLASSPATH.

public void handleRequest(@RequestBody Map<String, String> input)

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