如何在spring @RestController Servlet中设置获取查询参数名称？

Question

I have a simple @RestController and want to create a request object that holds any values from a GET query.

Moreover I'd like to use variable names being different from the get query parameter names.

@RestController
public class MyServlet {
    @RequestMapping(value = "/start")
    public String start(@Valid MyRequest req) {
                Logger.log("IN");
        return req.getTest();
    }
}

public class MyRequest {
    @XmlElement(name = "asd")
    private String test;

    //getter, setter
}

Request: localhost:8080/start?asd=imhere

Result: I'm seing the log statement IN , so the servlet works. BUT req Parameter is null. Why?

It works if I send the following url: localhost:8080/start?test=imhere So the servlet works, but not the parameter renaming.

Answer 1

Spring will try to build your MyRequest object using setters or reflecting into private variables, therefore the test variable will only be populated when you send a test parameter.

From the documentation (@RequestMapping - Supported method argument types) :

Command or form objects to bind request parameters to bean properties (via setters) or directly to fields...

Edit - If you want to change names you'll likely need a Converter. See:

1. docs
2. mvc example