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package com;

import java.util.HashMap;

import java.util.Map;

import com.google.common.cache.CacheBuilder;

import com.google.common.cache.CacheLoader;

import com.google.common.cache.LoadingCache;

public class PreloadCache {

public static void main(String[] args) {

//1.创建loader对象

CacheLoader<String,String> loader;

loader=new CacheLoader<String,String>(){

@Override

public String load(String key) throws Exception {

return key.toUpperCase();

}

};

//2.获取cache

LoadingCache<String,String> cache;

cache=CacheBuilder.newBuilder().build(loader);

//3.创建一个map

Map<String,String> map=new HashMap<String,String>();

map.put("first", "FIRST");

map.put("second", "SECOND");

//4.统一放到cache中

cache.putAll(map);

}

}