Feign二：复写Feign的默认配置

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Feign二：复写Feign的默认配置

1.在启动文件加入feign注解：@EnableFeignClients

FeignApp.java

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);

	}

}

2.新建一个Feign的默认配置类，并创建一个bean，返回： feign.Contract.Default 默认配置

import org.springframework.context.annotation.Bean;

import feign.Contract;

public class FooConfiguration {

	@Bean

	public Contract feignContract()

	{

		return new feign.Contract.Default();

	}

}

3.新建Feign客户端调用类，调用第三方接口的，并引入第2步复写的Feign配置

import org.springframework.cloud.netflix.feign.FeignClient;

import org.springframework.web.bind.annotation.PathVariable;

import com.muyang.bootmovie.configs.FooConfiguration;

import com.muyang.bootmovie.entity.User;

import feign.RequestLine;

@FeignClient(name="spring-boot-user", configuration=FooConfiguration.class)

public interface UserFeignClient {

	@RequestLine("GET /simple/{id}")

	public User findById(@PathVariable("id") Long id);

}

4.创建controller类，并调用feign客户端类

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.RestController;

import com.muyang.bootmovie.entity.User;

import com.muyang.bootmovie.feign.UserFeignClient;

import feign.Param;

@RestController

public class UserController {

	@Autowired

	private UserFeignClient userFeignClient;

	@GetMapping("/user/{id}")

	public User findById(@Param("id") Long id) {

		return this.userFeignClient.findById(id);

	}

}

5。一些其他参考

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;

	}

}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

	<modelVersion>4.0.0</modelVersion>

	<artifactId>boot-spring-movie-feign-override</artifactId>

	<packaging>jar</packaging>

	<parent>

		<groupId>com.muyang</groupId>

		<artifactId>boot-spring-cloud</artifactId>

		<version>0.0.1-SNAPSHOT</version>

	</parent>

	<properties>

		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

		<java.version>1.8</java.version>

	</properties>

	<dependencies>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter-web</artifactId>

		</dependency>

		<dependency>

			<groupId>org.springframework.cloud</groupId>

			<artifactId>spring-cloud-starter-eureka</artifactId>

		</dependency>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter-actuator</artifactId>

		</dependency>

		<dependency>

				<groupId>org.springframework.cloud</groupId>

				<artifactId>spring-cloud-starter-feign</artifactId>

		</dependency>	

	</dependencies>

</project>