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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。
Java 连接 Memcached
- import net.spy.memcached.MemcachedClient;
- import java.net.*;
-
-
- public class MemcachedJava {
- public static void main(String[] args) {
- try{
- // 本地连接 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 关闭连接
- mcc.shutdown();
-
- }catch(Exception ex){
- 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.
以下使用 java.util.concurrent.Future 来存储数据
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 存储数据
- Future fo = 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(Exception ex){
- 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
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数据
- Future fo = 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key
- fo = 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(Exception ex){
- System.out.println(ex.getMessage());
- }
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try {
- //连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加第一个 key=》value 对
- Future fo = 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 key
- fo = 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(Exception ex){
- System.out.println( ex.getMessage() );
- }
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数据
- Future fo = 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(Exception ex) {
- System.out.println(ex.getMessage());
- ]
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数据
- Future fo = 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(Exception ex) {
- System.out.println(ex.getMessage());
- }
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.CASValue;
- import net.spy.memcached.CASResponse;
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数据
- Future fo = 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)
- CASValue casValue = 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
- CASResponse casresp = 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(Exception ex) {
- System.out.println(ex.getMessage());
- }
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数据
- Future fo = 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"));
-
- // 关闭连接
- mcc.shutdown();
-
- }catch(Exception ex) {
- System.out.println(ex.getMessage());
- }
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.CASValue;
- import net.spy.memcached.CASResponse;
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数据
- Future fo = mcc.set("runoob", 900, "Free Education");
-
- // 输出执行 set 方法后的状态
- System.out.println("set status:" + fo.get());
-
- // 从缓存中获取键为 runoob 的值
- System.out.println("runoob value in cache - " + mcc.get("runoob"));
-
- // 通过 gets 方法获取 CAS token(令牌)
- CASValue casValue = mcc.gets("runoob");
-
- // 输出 CAS token(令牌) 值
- System.out.println("CAS value in cache - " + casValue);
-
- // 关闭连接
- mcc.shutdown();
-
- }catch(Exception ex) {
- System.out.println(ex.getMessage());
- }
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数据
- Future fo = mcc.set("runoob", 900, "World's largest online tutorials library");
-
- // 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.delete("runoob");
-
- // 输出执行 delete 方法后的状态
- System.out.println("delete 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(Exception ex) {
- System.out.println(ex.getMessage());
- }
- }
- }
- import java.net.InetSocketAddress;
- import java.util.concurrent.Future;
-
- import net.spy.memcached.MemcachedClient;
-
- public class MemcachedJava {
- public static void main(String[] args) {
-
- try{
-
- // 连接本地的 Memcached 服务
- MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
- System.out.println("Connection to server successful.");
-
- // 添加数字值
- Future fo = mcc.set("number", 900, "1000");
-
- // 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("value in cache - " + mcc.get("number"));
-
- // 自增并输出
- System.out.println("value in cache after increment - " + mcc.incr("number", 111));
-
- // 自减并输出
- System.out.println("value in cache after decrement - " + mcc.decr("number", 112));
-
- // 关闭连接
- mcc.shutdown();
-
- }catch(Exception ex) {
- System.out.println(ex.getMessage());
- }
- }
- }
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