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-2.12.3.jar。
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:
package com.runoops.test;
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.
set 操作实例
以下使用 java.util.concurrent.Future 来存储数据
MemcachedJava.java 文件:
package com.runoops.test;
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("runoops", 900, "Free Education");
// 查看存储状态
System.out.println("set status:" + fo.get());
// 输出值
System.out.println("runoops value in cache - " + mcc.get("runoops"));
// 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
runoops value in cache - Free Education
add 操作实例
MemcachedJava.java 文件:
package com.runoops.test;
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("runoops", 900, "Free Education");
// 打印状态
System.out.println("set status:" + fo.get());
// 输出
System.out.println("runoops value in cache - " + mcc.get("runoops"));
// 添加
fo = mcc.add("runoops", 900, "memcached");
// 打印状态
System.out.println("add status:" + fo.get());
// 添加新key
fo = mcc.add("runoops", 900, "All Free Compilers");
// 打印状态
System.out.println("add status:" + fo.get());
// 输出
System.out.println("runoops value in cache - " + mcc.get("runoops"));
// 关闭连接
mcc.shutdown();
}catch(Exception ex){
System.out.println(ex.getMessage());
}
}
}
replace 操作实例
MemcachedJava.java 文件:
package com.runoops.test;
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("runoops", 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("runoops value in cache - " + mcc.get("runoops"));
// 添加新的 key
fo = mcc.replace("runoops", 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("runoops value in cache - " + mcc.get("runoops"));
// 关闭连接
mcc.shutdown();
}catch(Exception ex){
System.out.println( ex.getMessage() );
}
}
}