春云：API网关路由不工作

Question

我正在使用Spring Cloud。我的Spring boot应用程序College-service、学生服务、eureka-server和api网关中有四个服务。我尝试使用API Gateway调用College-service和学生服务。当我从API Gateway调用MyCollege-service时，它可以正常工作，但学生服务不起作用。当我尝试获取学生服务时，我收到未找到错误404。我是Spring Cloud的新人。这是我的代码。

下面是我的网址，最后一个网址是404

实体

public class College {
    private String clgId;
    private String clgName;
    private String clgCity;

    List<Student> students;

    public College(String clgId, String clgName, String clgCity, List<Student> students) {
        this.clgId = clgId;
        this.clgName = clgName;
        this.clgCity = clgCity;
        this.students = students;
    }

    public College(String clgId, String clgName, String clgCity) {
        this.clgId = clgId;
        this.clgName = clgName;
        this.clgCity = clgCity;
    }
   
    // getter and setter
}

public class Student {
    private Long stId;
    private String stName;
    private String stEmail;
    private String clgId;

    public Student(Long stId, String stName, String stEmail, String clgId) {
        super();
        this.stId = stId;
        this.stName = stName;
        this.stEmail = stEmail;
        this.clgId = clgId;
    }

    // getter and setter
}

学院控制员

@RestController
@RequestMapping("/college")
public class CollegeController {
    @Autowired
    private CollegeService collegeService;

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping(value = "/{clgId}", method = RequestMethod.GET)
    public ResponseEntity<College> getColleges(@PathVariable("clgId") String clgId) {
        College college = collegeService.getCollege(clgId);
        List student = restTemplate.getForObject("http://student-service/college/student/" + college.getClgId(),
                List.class);
        college.setStudents(student);
        return ResponseEntity.ok(college);
    }
}

应用程序. yml

server:
  port: 9001
  
spring:
  application:
    name: college-service
    
eureka:
  instance:
    hostname: localhost

学生管理员实体

public class Student {
    private Long stId;
    private String stName;
    private String stEmail;
    private String clgId;

    public Student(Long stId, String stName, String stEmail, String clgId) {
        super();
        this.stId = stId;
        this.stName = stName;
        this.stEmail = stEmail;
        this.clgId = clgId;
    }

    // getter and setter
}

@RestController
@RequestMapping("/college")
public class StudentCotroller {

    @Autowired
    private StudentService studentService;

    @RequestMapping(value = "/student/{clgId}", method = RequestMethod.GET)
    public ResponseEntity<List<Student>> getStudents(@PathVariable("clgId") String clgId) {
        return ResponseEntity.ok(studentService.getStudents(clgId));
    }

}

应用程序. yml

server:
  port: 9002
  
spring:
  application:
    name: student-service
    
eureka:
  instance:
    hostname: localhost

应用程序. yml

server:
  port: 8761

eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
  server:
    waitTimeInMsWhenSyncEmpty: 0

应用程序. yml

server:
  port: 9003
  
eureka:
  instance:
    hostname: localhost

spring:
  application:
    name: api-gateway
  cloud:
    gateway:
      routes:
      - id: college-service
        uri: lb://college-service
        predicates:
        - Path=/college/**
      - id: student-service
        uri: lb://student-service
        predicates:
        - Path=/student/**

Answer 1

学生服务的谓词是匹配以学生开头的所有请求（Path=/学生/**）。但是，您致电学生服务，并要求从大学（/学院/学生/ CLG01）开始。此请求将我与大学服务相匹配，因为您将此服务的谓词设置为Path=/大学/**。/学院/** 路径匹配 /大学/学生/CLG01 路径。

可能的解决方案：

1. 将您的StudentController请求映射从/college
2. 对学生服务使用不同的谓词，例如Host
3. 设置特定路径谓词并更改路由的顺序：

     routes:
      - id: student-service
        uri: lb://student-service
        predicates:
        - Path=/college/student/**
      - id: college-service
        uri: lb://college-service
        predicates:
        - Path=/college/**