1. 引入pom配置

[code]<!--feign-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>

2.SpringBoot启动类上加上

[code]@EnableFeignClients
//我这里是与Mybatis plus结合, 所以需要去掉@MapperScan注解, 加到假面的config类中,注意注意=====================

 3.加上配置类

[code]@Configuration
@MapperScan("com.mark.mapper")
public class MybatisPlusConfig {
/**
* 分页插件
*
* @return PaginationInterceptor
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
return new PaginationInterceptor();
}

/**
* 数据权限插件
*
* @return DataScopeInterceptor
*/
@Bean
public DataScopeInterceptor dataScopeInterceptor() {
return new DataScopeInterceptor();
}
}

[code]@Configuration
public class KaptchaConfig {

private static final String KAPTCHA_BORDER = "kaptcha.border";
private static final String KAPTCHA_TEXTPRODUCER_FONT_COLOR = "kaptcha.textproducer.font.color";
private static final String KAPTCHA_TEXTPRODUCER_CHAR_SPACE = "kaptcha.textproducer.char.space";
private static final String KAPTCHA_IMAGE_WIDTH = "kaptcha.image.width";
private static final String KAPTCHA_IMAGE_HEIGHT = "kaptcha.image.height";
private static final String KAPTCHA_TEXTPRODUCER_CHAR_LENGTH = "kaptcha.textproducer.char.length";
private static final Object KAPTCHA_IMAGE_FONT_SIZE = "kaptcha.textproducer.font.size";

@Bean
public DefaultKaptcha producer() {
Properties properties = new Properties();
properties.put(KAPTCHA_BORDER, SecurityConstants.DEFAULT_IMAGE_BORDER);
properties.put(KAPTCHA_TEXTPRODUCER_FONT_COLOR, SecurityConstants.DEFAULT_COLOR_FONT);
properties.put(KAPTCHA_TEXTPRODUCER_CHAR_SPACE, SecurityConstants.DEFAULT_CHAR_SPACE);
properties.put(KAPTCHA_IMAGE_WIDTH, SecurityConstants.DEFAULT_IMAGE_WIDTH);
properties.put(KAPTCHA_IMAGE_HEIGHT, SecurityConstants.DEFAULT_IMAGE_HEIGHT);
properties.put(KAPTCHA_IMAGE_FONT_SIZE, SecurityConstants.DEFAULT_IMAGE_FONT_SIZE);
properties.put(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, SecurityConstants.DEFAULT_IMAGE_LENGTH);
Config config = new Config(properties);
DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
}

4.实现

[code]@FeignClient(value = "你所要调用的服务模块名称", fallback = UserService的实现类.class)
@Repository
public interface UserService {

/**
* 根据编号查询具体的用户信息
* /user/selectBySerial/{serial}: 你要调用的服务接口路径
* @param serial   编号
* @return User对象
*/
@GetMapping("/user/selectBySerial/{serial}")
User selectBySerial(@PathVariable("serial") String serial);
}

注意: 

第四步: 其实这就是一个Dao层, 我们通过本服务的controller调用这个Service从而达到调用别的模块的功能