Spring自动将GET请求参数映射到POJO

Question

我的REST控制器中有一个方法，它包含很多参数。例如：

@RequestMapping(value = "/getItem", method = RequestMethod.GET)
public ServiceRequest<List<SomeModel>> getClaimStatuses(
        @RequestParam(value = "param1", required = true) List<String> param1,
        @RequestParam(value = "param2", required = false) String param2,
        @RequestParam(value = "param3", required = false) List<String> param3,
        @RequestParam(value = "param4", required = false) List<String> param4,
        @RequestParam(value = "param5", required = false) List<String> param5) {
    // ......
}

我想把所有的GET请求参数映射到一个POJO对象，比如：

public class RequestParamsModel {
   public RequestParamsModel() {
   }
   public List<String> param1;
   public String param2;
   public List<String> param3;
   public String param4;
   public String param5;
}

我需要一些类似于我们可以在REST控制器中使用@RequestBody的东西。

在Spring 3.x中可以这样做吗

谢谢！

Answer 1

简单可行的是，确保您的bean具有适当的字段访问器。您可以为每个属性添加适当的验证，只需确保您有适当的jar即可。就代码而言，它将类似于

import javax.validation.constraints.NotNull;
public class RequestParamsModel {
    public RequestParamsModel() {}
    private List<String> param1;
    private String param2;
    private List<String> param3;
    private String param4;
    private String param5;
    @NotNull
    public List<String> getParam1() {
        return param1;
    }
    //  ...
}

控制器方法为：

import javax.validation.Valid;
@RequestMapping(value = "/getItem", method = RequestMethod.GET)
public ServiceRequest<List<SomeModel>> getClaimStatuses(@Valid RequestParamsModel model) {
    // ...
}

还有请求，类似于：

/getItem?param1=list1,list2&param2=ok

Answer 2

你想做吗

@RequestMapping(value = "/getItem", method = RequestMethod.GET)
public ServiceRequest<List<SomeModel>> getClaimStatuses(@ModelAttribute RequestParamsModel requestParamModel) {
...
}