@Log4j：注解在类上；为类提供一个 属性名为log 的 log4j 日志对像

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;

@RestController
@Slf4j
public class PaymentController {

@Resource  
private PaymentService paymentService;

@PostMapping(value = "/payment/create")  
public CommonResult create(Payment payment){  
    int result = paymentService.create(payment);  
    log.info("\*\*\*\*\*插入结果："+result);     　　//这里就是使用了Log这个对象  
    if (result>0){  //成功  
        return new CommonResult(200,"插入数据库成功",result);  
    }else {  
        return new CommonResult(444,"插入数据库失败",null);  
    }  
}  
@GetMapping(value = "/payment/get/{id}")  
public CommonResult getPaymentById(@PathVariable("id") Long id){  
    Payment payment = paymentService.getPaymentById(id);  
    log.info("\*\*\*\*\*查询结果："+payment);  
    if (payment!=null){  //说明有数据，能查询成功  
        return new CommonResult(200,"查询成功",payment);  
    }else {  
        return new CommonResult(444,"没有对应记录，查询ID："+id,null);  
    }  
}  

}