java串連memcached__java

使用 Java 程式串連 Memcached，需要在你的 classpath 中添加 Memcached jar 包。

點擊下載：spymemcached-2.10.3.jar

以下程式假定 Memcached 服務的主機為 127.0.0.1，連接埠為 11211。

串連執行個體

Java 串連 Memcached

import net.spy.memcached.MemcachedClient;import java.net.*;public class MemcachedJava {   public static void main(String[] args) {      try{         // 本地串連 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");                  // 關閉串連         mcc.shutdown();               }catch(Exception ex){         System.out.println( ex.getMessage() );      }   }}

該程式中我們使用 InetSocketAddress 串連 IP 為 127.0.0.1 連接埠 為 11211 的 memcached 服務。

執行以上代碼，如果串連成功會輸出以下資訊：

Connection to server successful.

set 操作執行個體

以下使用 java.util.concurrent.Future 來儲存資料

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try{         // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");               // 儲存資料         Future fo = mcc.set("runoob", 900, "Free Education");               // 查看儲存狀態         System.out.println("set status:" + fo.get());                  // 輸出值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex){         System.out.println( ex.getMessage() );      }   }}

執行程式，輸出結果為：

Connection to server successful.set status:truerunoob value in cache - Free Education

add 操作執行個體

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加資料         Future fo = mcc.set("runoob", 900, "Free Education");         // 列印狀態         System.out.println("set status:" + fo.get());         // 輸出         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 添加         Future fo = mcc.add("runoob", 900, "memcached");         // 列印狀態         System.out.println("add status:" + fo.get());         // 添加新key         fo = mcc.add("codingground", 900, "All Free Compilers");         // 列印狀態         System.out.println("add status:" + fo.get());                  // 輸出         System.out.println("codingground value in cache - " + mcc.get("codingground"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex){         System.out.println(ex.getMessage());      }   }}

replace 操作執行個體

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try {         //串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加第一個 key=》value 對         Future fo = mcc.set("runoob", 900, "Free Education");         // 輸出執行 add 方法後的狀態         System.out.println("add status:" + fo.get());         // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 添加新的 key         fo = mcc.replace("runoob", 900, "Largest Tutorials' Library");         // 輸出執行 set 方法後的狀態         System.out.println("replace status:" + fo.get());         // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex){         System.out.println( ex.getMessage() );      }   }}

append 操作執行個體

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加資料         Future fo = mcc.set("runoob", 900, "Free Education");         // 輸出執行 set 方法後的狀態         System.out.println("set status:" + fo.get());         // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 對存在的key進行資料添加操作         Future fo = mcc.append("runoob", 900, " for All");         // 輸出執行 set 方法後的狀態         System.out.println("append status:" + fo.get());                  // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("codingground"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex)         System.out.println(ex.getMessage());   }}

prepend操作執行個體

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加資料         Future fo = mcc.set("runoob", 900, "Education for All");         // 輸出執行 set 方法後的狀態         System.out.println("set status:" + fo.get());         // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 對存在的key進行資料添加操作         Future fo = mcc.prepend("runoob", 900, "Free ");         // 輸出執行 set 方法後的狀態         System.out.println("prepend status:" + fo.get());                  // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("codingground"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex)         System.out.println(ex.getMessage());   }}

CAS 操作執行個體

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{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加資料         Future fo = mcc.set("runoob", 900, "Free Education");         // 輸出執行 set 方法後的狀態         System.out.println("set status:" + fo.get());                     // 使用 get 方法擷取資料         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 通過 gets 方法擷取 CAS token（令牌）         CASValue casValue = mcc.gets("runoob");         // 輸出 CAS token（令牌） 值         System.out.println("CAS token - " + casValue);         // 嘗試使用cas方法來更新資料         CASResponse casresp = mcc.cas("runoob", casValue.getCas(), 900, "Largest Tutorials-Library");                  // 輸出 CAS 響應資訊         System.out.println("CAS Response - " + casresp);         // 輸出值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex)         System.out.println(ex.getMessage());   }}

get操作執行個體

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加資料         Future fo = mcc.set("runoob", 900, "Free Education");         // 輸出執行 set 方法後的狀態         System.out.println("set status:" + fo.get());         // 使用 get 方法擷取資料         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex)         System.out.println(ex.getMessage());   }}

gets 操作執行個體、CAS

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{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加資料         Future fo = mcc.set("runoob", 900, "Free Education");         // 輸出執行 set 方法後的狀態         System.out.println("set status:" + fo.get());                     // 從緩衝中擷取鍵為 runoob 的值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 通過 gets 方法擷取 CAS token（令牌）         CASValue casValue = mcc.gets("runoob");         // 輸出 CAS token（令牌） 值         System.out.println("CAS value in cache - " + casValue);         // 關閉串連         mcc.shutdown();               }catch(Exception ex)         System.out.println(ex.getMessage());   }}

delete操作執行個體

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加資料         Future fo = mcc.set("runoob", 900, "World's largest online tutorials library");         // 輸出執行 set 方法後的狀態         System.out.println("set status:" + fo.get());         // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("runoob"));         // 對存在的key進行資料添加操作         Future fo = mcc.delete("runoob");         // 輸出執行 delete 方法後的狀態         System.out.println("delete status:" + fo.get());         // 擷取鍵對應的值         System.out.println("runoob value in cache - " + mcc.get("codingground"));         // 關閉串連         mcc.shutdown();               }catch(Exception ex)         System.out.println(ex.getMessage());   }}

Incr/Decr操作執行個體

import java.net.InetSocketAddress;import java.util.concurrent.Future;import net.spy.memcached.MemcachedClient;public class MemcachedJava {   public static void main(String[] args) {         try{            // 串連本地的 Memcached 服務         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));         System.out.println("Connection to server sucessful.");         // 添加數字值         Future fo = mcc.set("number", 900, "1000");         // 輸出執行 set 方法後的狀態         System.out.println("set status:" + fo.get());         // 擷取鍵對應的值         System.out.println("value in cache - " + mcc.get("number"));         // 自增並輸出         System.out.println("value in cache after increment - " + mcc.incr("number", 111));         // 自減並輸出         System.out.println("value in cache after decrement - " + mcc.decr("number", 112));         // 關閉串連         mcc.shutdown();               }catch(Exception ex)         System.out.println(ex.getMessage());   }}