springboot緩存之@Caching和@CacheConfig注解

@Caching：用於定制復雜的緩存規則

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：指定緩存的名字，每個緩存組件有一個唯一的名字。緩存組件由CacheManager進行管理。
    //key：緩存數據時用到的key，默認使用方法參數的值，1-方法返回值 key =
    //#id也可這么表示：#root.args[0]（第一個參數）
    //keyGenerator：指定生成緩存的組件id，使用key或keyGenerator其中一個即可
    //cacheManager，cacheResolver：指定交由哪個緩存管理器，使用其中一個參數即可
    //condition：指定符合條件時才進行緩存
    //unless：當unless指定的條件為true，方法的返回值就不會被緩存
    //sync：是否使用異步模式
    //"#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 "刪除成功";
    }

    @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;
    }
}

在執行Localhost:8080/emp/lastName/jack請求之后，會同時將@CachePut緩存規則加入到緩存中。

@CacheConfig(cacheNames="emp")用於標注在類上，可以存放該類中所有緩存的公有屬性，比如設置緩存的名字。