Feign二： @FeignClient 接口调用

在项目的启动文件加入：@EnableFeignClients 注解，

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
 
@EnableEurekaClient
@SpringBootApplication
@EnableFeignClients
public class FeignApp {
 
 
    public static void main(String[] args) {
        SpringApplication.run(FeignApp.class, args);
    }
}

实例结构如下：

那么有实体类: User.java

Fengn客户端：UserFeignClient.java

控制器: MovieController.java调取第三方user接口

User.java

import java.math.BigDecimal;
 
public class User {
 
    private  Long id;
     
    private String username;
     
    private String name;
     
    private int age;
     
    private BigDecimal balance;
 
    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 getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public int getAge() {
        return age;
    }
 
    public void setAge(int age) {
        this.age = age;
    }
 
    public BigDecimal getBalance() {
        return balance;
    }
 
    public void setBalance(BigDecimal balance) {
        this.balance = balance;
    }
     
     
     
     
     
}

UserFeign客户端

其中：@FeignClient("spring-boot-user")： spring-boot-user是eureka服务里面user项目的名称，加入此注解，能直接连接user项目接口

import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
import com.muyang.bootmovie.entity.User;
 
@FeignClient("spring-boot-user")
public interface UserFeignClient {
 
    // 两个坑：1. @GetMapping不支持   2. @PathVariable得设置value
    @RequestMapping(value="/simple/{id}", method=RequestMethod.GET)
    public User findById(@PathVariable("id") Long id);
     
    @RequestMapping(value="/test", method=RequestMethod.POST)
    public User postUser(@RequestBody User user);
}

MovieController控制中心，调取UserFeign客户端

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.muyang.bootmovie.entity.User;
import com.muyang.bootmovie.feign.UserFeignClient;
 
@RestController
public class MovieController {
 
    @Autowired
    private UserFeignClient userFeignClient;
     
    @GetMapping("/movie/{id}")
    public User findById(@PathVariable("id") Long id) {
        return this.userFeignClient.findById(id);
    }
     
    @RequestMapping(value="/test", method=RequestMethod.GET)
    public User userPost(User user)
    {
        return this.userFeignClient.postUser(user);
         
    }
}