Java 连接 Memcached 服务
使用 Java 程序连接 Memcached，需要在你的 classpath 中添加 Memcached jar 包。
本站 jar 包下载地址：spymemcached-2.10.3.jar。
Google Code jar 包下载地址：spymemcached-2.10.3.jar（需要科学上网）。
以下程序假定 Memcached 服务的主机为 127.0.0.1，端口为 11211。
连接实例
Java 连接 Memcached
MemcachedJava.java 文件：
importnet.spy.memcached.MemcachedClient;
importjava.net.*;
publicclassMemcachedJava{publicstaticvoidmain(String[]args){try{// 本地连接 Memcached 服务MemcachedClientmcc = newMemcachedClient(newInetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful.");
// 关闭连接mcc.shutdown();
}catch(Exceptionex){System.out.println(ex.getMessage());
}}}
该程序中我们使用 InetSocketAddress 连接 IP 为 127.0.0.1 端口 为 11211 的 memcached 服务。
执行以上代码，如果连接成功会输出以下信息：
Connection to server successful.
set 操作实例
以下使用 java.util.concurrent.Future 来存储数据
MemcachedJava.java 文件：
importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;
importnet.spy.memcached.MemcachedClient;
publicclassMemcachedJava{publicstaticvoidmain(String[]args){try{// 连接本地的 Memcached 服务MemcachedClientmcc = newMemcachedClient(newInetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful.");
// 存储数据Futurefo = mcc.set("runoob", 900, "Free Education");
// 查看存储状态System.out.println("set status:" + fo.get());
// 输出值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 关闭连接mcc.shutdown();
}catch(Exceptionex){System.out.println(ex.getMessage());
}}}
执行程序，输出结果为：
Connection to server successful. set status:true runoob value in cache - Free Education
add 操作实例
MemcachedJava.java 文件：
importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;
importnet.spy.memcached.MemcachedClient;
publicclassMemcachedJava{publicstaticvoidmain(String[]args){try{// 连接本地的 Memcached 服务MemcachedClientmcc = newMemcachedClient(newInetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful.");
// 添加数据Futurefo = mcc.set("runoob", 900, "Free Education");
// 打印状态System.out.println("set status:" + fo.get());
// 输出System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 添加fo = mcc.add("runoob", 900, "memcached");
// 打印状态System.out.println("add status:" + fo.get());
// 添加新keyfo = mcc.add("runoob", 900, "All Free Compilers");
// 打印状态System.out.println("add status:" + fo.get());
// 输出System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 关闭连接mcc.shutdown();
}catch(Exceptionex){System.out.println(ex.getMessage());
}}}
replace 操作实例
MemcachedJava.java 文件：
importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;
importnet.spy.memcached.MemcachedClient;
publicclassMemcachedJava{publicstaticvoidmain(String[]args){try{//连接本地的 Memcached 服务MemcachedClientmcc = newMemcachedClient(newInetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful.");
// 添加第一个 key=》value 对Futurefo = mcc.set("runoob", 900, "Free Education");
// 输出执行 add 方法后的状态System.out.println("add status:" + fo.get());
// 获取键对应的值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 添加新的 keyfo = mcc.replace("runoob", 900, "Largest Tutorials' Library");
// 输出执行 set 方法后的状态System.out.println("replace status:" + fo.get());
// 获取键对应的值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 关闭连接mcc.shutdown();
}catch(Exceptionex){System.out.println(ex.getMessage());
}}}
append 操作实例
MemcachedJava.java 文件：
importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;
importnet.spy.memcached.MemcachedClient;
publicclassMemcachedJava{publicstaticvoidmain(String[]args){try{// 连接本地的 Memcached 服务MemcachedClientmcc = newMemcachedClient(newInetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful.");
// 添加数据Futurefo = mcc.set("runoob", 900, "Free Education");
// 输出执行 set 方法后的状态System.out.println("set status:" + fo.get());
// 获取键对应的值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 对存在的key进行数据添加操作fo = mcc.append("runoob", 900, " for All");
// 输出执行 set 方法后的状态System.out.println("append status:" + fo.get());
// 获取键对应的值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 关闭连接mcc.shutdown();
}catch(Exceptionex){System.out.println(ex.getMessage());
]
}}
prepend 操作实例
MemcachedJava.java 文件：
importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;
importnet.spy.memcached.MemcachedClient;
publicclassMemcachedJava{publicstaticvoidmain(String[]args){try{// 连接本地的 Memcached 服务MemcachedClientmcc = newMemcachedClient(newInetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful.");
// 添加数据Futurefo = mcc.set("runoob", 900, "Education for All");
// 输出执行 set 方法后的状态System.out.println("set status:" + fo.get());
// 获取键对应的值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 对存在的key进行数据添加操作fo = mcc.prepend("runoob", 900, "Free ");
// 输出执行 set 方法后的状态System.out.println("prepend status:" + fo.get());
// 获取键对应的值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 关闭连接mcc.shutdown();
}catch(Exceptionex){System.out.println(ex.getMessage());
}}}
CAS 操作实例
MemcachedJava.java 文件：
importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;
importnet.spy.memcached.CASValue;
importnet.spy.memcached.CASResponse;
importnet.spy.memcached.MemcachedClient;
publicclassMemcachedJava{publicstaticvoidmain(String[]args){try{// 连接本地的 Memcached 服务MemcachedClientmcc = newMemcachedClient(newInetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful.");
// 添加数据Futurefo = mcc.set("runoob", 900, "Free Education");
// 输出执行 set 方法后的状态System.out.println("set status:" + fo.get());
// 使用 get 方法获取数据System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 通过 gets 方法获取 CAS token（令牌）CASValuecasValue = mcc.gets("runoob");
// 输出 CAS token（令牌） 值System.out.println("CAS token - " + casValue);
// 尝试使用cas方法来更新数据CASResponsecasresp = mcc.cas("runoob", casValue.getCas(), 900, "Largest Tutorials-Library");
// 输出 CAS 响应信息System.out.println("CAS Response - " + casresp);
// 输出值System.out.println("runoob value in cache - " + mcc.get("runoob"));
// 关闭连接mcc.shutdown();
}catch(Exceptionex){System.out.println(ex.getMessage());
}}}
get 操作实例
MemcachedJava.java 文件：
importjava.net.InetSocketAddress;
import