说明

  • 缓存注解 @Cacheable
  • 缓存失效注解 @CacheEvict

代码示例

TestCacheService.java 类

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package com.ruoyi.test.service;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

@Service
public class TestCacheService {
    public static final String TEST_CACHE = "testCache";

    /**
     * 缓存，key 包含 1 个参数
     * testCache::xxx
     * @param id
     * @return
     */
    @Cacheable(value = TEST_CACHE, key = "#id")
    public String cache(String id) {
        return System.currentTimeMillis() + ":cache:" + id;
    }

    /**
     * 使指定缓存失效
     * @param id
     * @return
     */
    @CacheEvict(value = TEST_CACHE, key = "#id")
    public String cacheEvict(String id) {
        return System.currentTimeMillis() + ":cacheEvict:" + id;
    }

    /**
     * 缓存, key 包含多个参数
     * testCache::xxx:yyy
     * @param code
     * @param key
     * @return
     */
    @Cacheable(value = TEST_CACHE, key = "#code + ':' + #key")
    public String cache2(String code, String key) {
        return System.currentTimeMillis() + ":cache2:" + code + ":" + key;
    }

    /**
     * 使指定缓存失效
     * @param code
     * @param key
     * @return
     */
    @CacheEvict(value = TEST_CACHE, key = "#code + ':' + #key")
    public String cacheEvict2(String code, String key) {
        return System.currentTimeMillis() + ":cacheEvict2:" + code + ":" + key;
    }

    /**
     * 使缓存 TEST_CACHE 下所有缓存失效
     * @return
     */
    @CacheEvict(value = TEST_CACHE, allEntries = true)
    public String cacheEvictByBigKey() {
        return System.currentTimeMillis() + ":cacheEvictByBigKey";
    }
}

TestCacheController.java 类

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package com.ruoyi.test;

import com.ruoyi.common.annotation.Anonymous;
import com.ruoyi.test.service.TestCacheService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author bowei
 * @date 2024/12/2
 */
@Api("测试缓存")
@RestController
@RequestMapping("/testCache")
public class TestCacheController {
    @Autowired
    private TestCacheService testCacheService;

    // 缓存，单个参数
    @ApiOperation(value = "缓存，单个参数")
    @RequestMapping("/cache")
    @Anonymous
    public String cache(String id) {
        return testCacheService.cache(id);
    }

    // 缓存，多个参数
    @ApiOperation(value = "缓存，多个参数")
    @RequestMapping("/cache2")
    @Anonymous
    public String cache2(String code, String key) {
        return testCacheService.cache2(code, key);
    }

    // 删除指定缓存, 单个参数
    @ApiOperation(value = "删除指定缓存, 单个参数")
    @RequestMapping("/cacheEvict")
    @Anonymous
    public String cacheEvict(String id) {
        return testCacheService.cacheEvict(id);
    }

    // 删除指定缓存, 多个参数
    @ApiOperation(value = "删除指定缓存, 多个参数")
    @RequestMapping("/cacheEvict2")
    @Anonymous
    public String cacheEvict2(String code, String key) {
        return testCacheService.cacheEvict2(code, key);
    }

    // 删除大 key 下所有缓存
    @ApiOperation(value = "删除大 key 下所有缓存")
    @RequestMapping("/cacheEvictByBigKey")
    @Anonymous
    public String cacheEvictByBigKey() {
        return testCacheService.cacheEvictByBigKey();
    }
}