guava cache简单工具类

1、pom文件中引入guava对应的jar

   <dependency>
				<groupId>com.google.guava</groupId>
				<artifactId>guava</artifactId>
				<version>17.0</version>
			</dependency>

 

 2、GuavaCacheUtil

import java.math.BigDecimal;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
/**
 * guava本地缓存工具类
 * @author lh
 *
 */
public final class GuavaCacheUtil {
	
	private static CacheBuilder<Object, Object> cacheBuilder = CacheBuilder.newBuilder().maximumSize(2000).initialCapacity(10);
	private static Cache<String, Object> cache;
	static{
		cache =cacheBuilder.build();
	}
	private GuavaCacheUtil() {
	}
	
	/**
	 * 添加缓存
	 * @param key
	 * @param value
	 */
	public static void set(String key, Object value){
		cache.put(key, value);
	}
	
	/**
	 * 删除缓存
	 * @param key
	 */
	public static void del(String key){
		cache.invalidate(key);
	}
	
	/**
	 * 根据key取得缓存对象
	 * @param key
	 * @return
	 */
	public static Object get(String key){
		return cache.getIfPresent(key);
	}
	
	public static String getStr(String key){
		return get(key).toString();
	}
	
	public static int getInt(String key){
		Object value = get(key);
		if(value instanceof Integer){
			return Integer.valueOf(value.toString());
		}
		return 0;
	}
	
	public static BigDecimal getBigDecimal(String key){
		Object value = get(key);
		if(value instanceof BigDecimal){
			return new BigDecimal(value.toString());
		}
		return BigDecimal.ZERO;
	}
	
	
}