springboot缓存之@Caching和@CacheConfig注解

@Caching：用于定制复杂的缓存规则

package com.gong.springbootcache.controller;

import com.gong.springbootcache.bean.Employee;
import com.gong.springbootcache.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.cache.annotation.Caching;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class EmployeeController {

    @Autowired
    EmployeeService employeeService;

    //value：指定缓存的名字，每个缓存组件有一个唯一的名字。缓存组件由CacheManager进行管理。
    //key：缓存数据时用到的key，默认使用方法参数的值，1-方法返回值 key =
    //#id也可这么表示：#root.args[0]（第一个参数）
    //keyGenerator：指定生成缓存的组件id，使用key或keyGenerator其中一个即可
    //cacheManager，cacheResolver：指定交由哪个缓存管理器，使用其中一个参数即可
    //condition：指定符合条件时才进行缓存
    //unless：当unless指定的条件为true，方法的返回值就不会被缓存
    //sync：是否使用异步模式
    //"#root.methodName+'[+#id+]'"
    @Cacheable(value = "emp")
    @ResponseBody
    @RequestMapping("/emp/{id}")
    public Employee getEmp(@PathVariable("id") Integer id){
        Employee emp = employeeService.getEmp(id);
        return emp;
    }

    @CachePut(value = "emp",key="#employee.id")
    @ResponseBody
    @GetMapping("/emp")
    public Employee updateEmp(Employee employee){
        Employee emp =  employeeService.updateEmp(employee);
        return emp;
    }

    @CacheEvict(value = "emp",key = "#id")
    @ResponseBody
    @GetMapping("/emp/del/{id}")
    public String deleteEmp(@PathVariable("id") Integer id){
        //employeeService.deleteEmp(id);
        return "删除成功";
    }

    @Caching(
            cacheable = {
                    @Cacheable(value = "emp",key = "#lastName")
            },
            put = {
                    @CachePut(value = "emp",key = "#result.id"),
                    @CachePut(value = "emp",key = "#result.email"),
            }
    )
    @ResponseBody
    @RequestMapping("/emp/lastName/{lastName}")
    public Employee getEmpByLastName(@PathVariable("lastName") String lastName){
        Employee employee = employeeService.getEmpByLastName(lastName);
        return employee;
    }
}

在执行Localhost:8080/emp/lastName/jack请求之后，会同时将@CachePut缓存规则加入到缓存中。

@CacheConfig(cacheNames="emp")用于标注在类上，可以存放该类中所有缓存的公有属性，比如设置缓存的名字。