logger.info占位符的使用

{}表示占位符，使用方法如下：

 package org.pine.controller;

 import javax.annotation.Resource;
 import org.pine.service.CashAccountService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;

 @Controller
 @RequestMapping("/cashAccount")
 public class CashAccountController {
     private static Logger logger = LoggerFactory.getLogger(CashAccountController.class);

     @Resource
     private CashAccountService cashAccountService;

     @RequestMapping("/transfer")
     @ResponseBody
     public String transfer(Integer from, Integer to, Double amount) {
         try {
             logger.info("from:{},to:{},amount:{}",from,to,amount);
             this.cashAccountService.transfer(from, to, amount);
             return "success";
         } catch (Exception e) {
             return "failure";
         }

     }

 }