***************Controller*****************
package com.sky.springcloud.controller;

import com.sky.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
@RestController
@Slf4j
public class PaymentController {
    @Resource
    private PaymentService paymentService;
    @Value("${server.port}")
    private String serverport;
    @GetMapping("/payment/hystrix/ok/{id}")
    public String paymentInfo_Ok(@PathVariable("id") Integer id){
        String result = paymentService.paymentInfo_ok(id);
        log.info("*****"+ result);
        return result;
    }
    @GetMapping("/payment/hystrix/timeout/{id}")
    public String paymentInfo_TimeOut(@PathVariable("id") Integer id){
        String result = paymentService.payment_Info_TimeOut(id);
}
*******************Service******************** 
package com.sky.springcloud.service;
import org.springframework.stereotype.Service;
import java.util.concurrent.TimeUnit;
@Service
public class PaymentServiceImpl implements PaymentService{
    @Override
    public String paymentInfo_ok(Integer id) {
        return "線程池：" + Thread.currentThread().getName() + "paymentInfo_Ok. id:" + id + "\t" + "~~~~~";
    public String payment_Info_TimeOut(Integer id) {
       try {
            TimeUnit.SECONDS.sleep(5);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "線程池：" + Thread.currentThread().getName() + "paymentInfo_TimeOut. id:" + id + "\t" + "~~~~~";

package com.sky.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
@SpringBootApplication
@EnableEurekaClient //啟用Eureka
@EnableHystrix     //啟用Hystrix
public class Payment8001 {
    public static void main(String[] args) {
        SpringApplication.run(Payment8001.class,args);
    }
}

 @HystrixCommand(fallbackMethod = "payment_Info_TimeOutHandler",//當(dāng)服務(wù)降級(jí)時(shí),調(diào)用payment_Info_TimeOutHandler方法
                  commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",
            value = "3000")//設(shè)置時(shí)間為3秒,超過(guò)三秒就為時(shí)間超限

*****************改后的Service*******************
package com.sky.springcloud.service;

import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;
@Service
public class PaymentServiceImpl implements PaymentService{
    @Override
    public String paymentInfo_ok(Integer id) {
        return "線程池：" + Thread.currentThread().getName() + "paymentInfo_Ok. id:" + id + "\t" + "~~~~~";
    }

    @HystrixCommand(fallbackMethod = "payment_Info_TimeOutHandler",commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "3000")
    })
    public String payment_Info_TimeOut(Integer id) {
      try {
            TimeUnit.SECONDS.sleep(5);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
      // int a = 10 / 0;
        return "線程池：" + Thread.currentThread().getName() + "paymentInfo_TimeOut. id:" + id + "\t" + "~~~~~";
    }
    public String payment_Info_TimeOutHandler(Integer id){
        return "線程超時(shí)或異常 " + Thread.currentThread().getName();
    }
}

package com.sky.springcloud.service;

import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
@Service
@DefaultProperties(defaultFallback = "Gloub_Test")
public class PaymentServiceImpl implements PaymentService{
    @Override
    @HystrixCommand
    public String paymentInfo_ok(Integer id) {
        int a = 10 / 0;
        return "線程池：" + Thread.currentThread().getName() + "paymentInfo_Ok. id:" + id + "\t" + "~~~~~";
    }
    @HystrixCommand(fallbackMethod = "payment_Info_TimeOutHandler",commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "3000")
    })
    public String payment_Info_TimeOut(Integer id) {
   /*     try {
            TimeUnit.SECONDS.sleep(5);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }*/
        return "線程池：" + Thread.currentThread().getName() + "paymentInfo_TimeOut. id:" + id + "\t" + "~~~~~";
    public String payment_Info_TimeOutHandler(Integer id){
        return "線程超時(shí)或異常 " + Thread.currentThread().getName();
    public String Gloub_Test(){
        return "走了全局的";
}

//是否開(kāi)啟服務(wù)熔斷(斷路器)
 @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),
 //服務(wù)請(qǐng)求的次數(shù) 
 @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),
 //時(shí)間的窗口期
 @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),
 //當(dāng)失敗率達(dá)到多少后發(fā)生熔斷
 @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"), 

******************Service*****************
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",
                    commandProperties = {
                    @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),
                    @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),
                    @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),
                    @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),
                    })
    public String PaymentCircuitBreaker(@PathVariable("id") Integer id){
        if(id<0){
            throw new RuntimeException("********** id不能為負(fù)");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return  "id 不能為負(fù):" + id;
************Controller********************
    @GetMapping("/payment/circuit/{id}")
        String result = paymentService.PaymentCircuitBreaker(id);
        log.info(result + "***********");
        return result;