使用Spring Cloud Feign远程调用

Spring Cloud Feign简介参考：http://blog.youkuaiyun.com/neosmith/article/details/52449921

根据专家学者提供的账号密码，要在用户表注册一个专家学者账号(用户和专家学者不同的数据库)

在userContorller.java写一个方法：注册专家学者账号

/**
	 * 专家学者注册
	 * 
	 * @param username
	 * @param password
	 * @return
	 */
	@ApiOperation(value = "专家学者注册")
	@RequestMapping(value = "/registExpert", method = RequestMethod.POST)
	public long registExpert(@RequestParam("username") String username, @RequestParam("password") String password) {
		User user = new User();
		user.setUsername(username);
		user.setPassword(password);
		userService.insertSelective(user);
		long userId = user.getUserId();
		return userId;
	}

UserClient.java（这里的接口和要远程调用的controller方法声明一样（此处是UserController.java），可直接复制过来，如下所示）

package com.lgsc.cjbd.expert.remote.client;

import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import com.lgsc.cjbd.vo.Response;

@FeignClient(name = "cjbd-user", fallback = UserClientFallback.class)
public interface UserClient {

	/**
	 * 注册专家学者
	 */
	@RequestMapping(value = "/user/user/registExpert", method = RequestMethod.POST)
	long registExpert(@RequestParam("username") String username, @RequestParam("password") String password);
}

以及失败回调用UserClientFallBack.java

package com.lgsc.cjbd.expert.remote.client;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.stereotype.Component;

import com.lgsc.cjbd.vo.Response;

/**
 * 失败回调
 * 
 * @author yeqj
 */
@Component
public class UserClientFallback implements UserClient {
	private static Logger log = LogManager.getLogger(UserClientFallback.class);

	@Override
	public long registExpert(String username, String password, String realName) {
		log.error("远程调用失败，注册专家学者失败，参数：[username=" + username + ",password=" + password + "]");
		return 0;
	}
}

之后再专家学者Service层传递专家学者用户名和密码过去，在用户表新增专家学者注册记录

userClient.registExpert(username, password);

即可完成远程调用