使用ehcache
1.首先引入ehcache相关的jar包：ehcache-core-2.6.3.jar、slf4j-api-1.6.1.jar、slf4j-jdk14-1.6.1.jar
2.在类路径下创建配置文件ehcache.xml：
public class EhcacheTest {private Cache cache;@Beforepublic void init() {CacheManager cacheManager = CacheManager.create();cache = cacheManager.getCache("userCache");}@Testpublic void testEhcacheString() {String key = "hello";String value = "world";cache.put(new Element(key, value));Element element = cache.get(key);Object obj = element.getObjectValue();Assert.assertEquals(value, obj);System.out.println(obj);}@Testpublic void testEhcacheObj() {String key = "user";User value = new User("zhangsan", "lisi");cache.put(new Element(key, value));Element element = cache.get(key);Object obj = element.getObjectValue();Assert.assertEquals(value, obj);System.out.println(obj);Object objSer = element.getValue();Assert.assertEquals(value, objSer);System.out.println(objSer);}}