配置

yd-user-api/src/main/java/com/yd/user/api/dto/UserDTO.java

+package com.yd.user.api.dto;
+
+import java.util.List;
+
+public class UserDTO {
+    private Long id;
+    private String username;
+    private String password;
+    private List<String> roles;
+    
+    // 需要Getter和Setter
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+    public String getUsername() { return username; }
+    public void setUsername(String username) { this.username = username; }
+    public String getPassword() { return password; }
+    public void setPassword(String password) { this.password = password; }
+    public List<String> getRoles() { return roles; }
+    public void setRoles(List<String> roles) { this.roles = roles; }
+}

yd-user-api/src/main/java/com/yd/user/api/feign/UserFeignClient.java

+package com.yd.user.api.feign;
+
+import com.yd.user.api.dto.UserDTO;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+@FeignClient(name = "yd-user-api", contextId = "userFeignClient")
+public interface UserFeignClient {
+
+    @GetMapping("/internal/user/findByUsername")
+    UserDTO findByUsername(@RequestParam("username") String username);
+}