java Feign Client 不解析 Query 参数
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Feign Client does not resolve Query parameter
提问by Bee
Here is my interface.
这是我的界面。
public interface SCIMServiceStub {
@RequestLine("GET /Users/{id}")
SCIMUser getUser(@Param("id") String id);
@RequestLine("GET /Groups?filter=displayName+Eq+{roleName}")
SCIMGroup isValidRole(@Param("roleName") String roleName);
}
Here getUsercall works fine. But isValidRoleis not working properly as the request is eventually sent like this.
在这里getUser通话工作正常。但isValidRole由于请求最终是这样发送的，因此无法正常工作。
/Groups?filter=displayName+Eq+{roleName}"
Here {roleName}is not resolved. What am I missing here? Appreciate some help, as I'm clueless at this point.
这里{roleName}没有解决。我在这里错过了什么？感谢一些帮助，因为我在这一点上一无所知。
Edit: 1 more question: Is there a way to avoid automatic url encoding of query parameters?
编辑：还有 1 个问题：有没有办法避免查询参数的自动 url 编码？
回答by yongsung.yoon
It seems to be caused by a bug that is already opened - https://github.com/OpenFeign/feign/issues/424
似乎是由已经打开的错误引起的 - https://github.com/OpenFeign/feign/issues/424
Like in comments, you can define your own Param.Expandersomething like below as a workaround.
就像在评论中一样，您可以定义自己的Param.Expander类似下面的内容作为解决方法。
@RequestLine("GET /Groups?filter={roleName}")
String isValidRole(@Param(value = "roleName", expander = PrefixExpander.class) String roleName);
static final class PrefixExpander implements Param.Expander {
@Override
public String expand(Object value) {
return "displayName+Eq+" + value;
}
}
回答by Frank.Chang
As the recent(2019.04) open feign issueand spring docsay：
正如最近（2019.04）openfeign issue和spring doc所说：
The OpenFeign @QueryMap annotation provides support for POJOs to be used as GET parameter maps.
Spring Cloud OpenFeign provides an equivalent @SpringQueryMap annotation, which is used to annotate a POJO or Map parameter as a query parameter map since 2.1.0.
OpenFeign @QueryMap 注释支持将 POJO 用作 GET 参数映射。
Spring Cloud OpenFeign 提供了一个等效的@SpringQueryMap 注解，从2.1.0 开始用于将POJO 或Map 参数注解为查询参数映射。
You can use it like this:
你可以这样使用它：
@GetMapping("user")
String getUser(@SpringQueryMap User user);
public class User {
private String name;
private int age;
...
}
回答by Chinthaka Dinadasa
Working fine using @QueryMap
使用正常工作 @QueryMap
URL: /api/v1/task/search?status=PENDING&size=20&page=0
网址：/api/v1/task/search?status=PENDING&size=20&page=0
Map<String, String> parameters = new LinkedHashMap<>()
parameters.put("status", "PENDING")
parameters.put("size", "20")
parameters.put("page", "0")
def tasks = restClientFactory.taskApiClient.searchTasks(parameters)
Inside Client Interface
内部客户端界面
@RequestLine("GET /api/v1/task/search?{parameters}")
List<Task> searchTasks(@QueryMap parameters)
