网站平台系统设计公司,wordpress语言包下载地址,企业网站设计要点,西安企业建站大家如果对使用netty搞这些http请求什么的感兴趣的#xff0c;可以参观我自己创建的这个项目。
nanshaws/nettyWeb: 复习一下netty#xff0c;并打算做一个web项目出来 (github.com)
Redis的基本命令包括#xff1a; SET key value#xff1a;设置指定key的值。 GET key…大家如果对使用netty搞这些http请求什么的感兴趣的可以参观我自己创建的这个项目。
nanshaws/nettyWeb: 复习一下netty并打算做一个web项目出来 (github.com)
Redis的基本命令包括 SET key value设置指定key的值。 GET key获取指定key的值。 DEL key删除指定key。 EXISTS key检查指定key是否存在。 TTL key获取指定key的过期时间。 KEYS pattern查找所有符合指定模式的key。 INCR key将指定key的值增加1。 DECR key将指定key的值减少1。 LPUSH key value将值添加到列表的左侧。 RPUSH key value将值添加到列表的右侧。 LPOP key移除并返回列表左侧的值。 RPOP key移除并返回列表右侧的值。 SADD key member将成员添加到集合中。 SMEMBERS key获取集合中的所有成员。 ZADD key score member将成员添加到有序集合中。 ZRANGE key start stop按照分数从小到大的顺序获取有序集合中指定范围的成员。 HSET key field value将哈希表中指定字段的值设置为指定值。 HGET key field获取哈希表中指定字段的值。 HMGET key field1 [field2]获取哈希表中指定字段的值列表。 PING测试Redis服务器是否可用。
用netty操作redis
引入依赖
?xml version1.0 encodingUTF-8?
project xmlnshttp://maven.apache.org/POM/4.0.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersiongroupIdorg.tianfan/groupIdartifactIdnettyTestLearn/artifactIdversion1.0-SNAPSHOT/versionpropertiesmaven.compiler.source17/maven.compiler.sourcemaven.compiler.target17/maven.compiler.targetproject.build.sourceEncodingUTF-8/project.build.sourceEncoding/propertiesdependenciesdependencygroupIdio.netty/groupIdartifactIdnetty-transport-native-epoll/artifactIdversion4.1.70.Final/version/dependencydependencygroupIdio.netty/groupIdartifactIdnetty-all/artifactIdversion4.1.86.Final/version/dependencydependencygroupIdjakarta.activation/groupIdartifactIdjakarta.activation-api/artifactIdversion2.1.2/version/dependencydependencygroupIdorg.eclipse.angus/groupIdartifactIdangus-mail/artifactIdversion1.0.0/version/dependencydependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdversion8.0.33/version/dependencydependencygroupIdorg.mybatis/groupIdartifactIdmybatis/artifactIdversion3.5.10/version/dependencydependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdversion1.18.30/version/dependency!-- json--dependencygroupIdcom.google.code.gson/groupIdartifactIdgson/artifactIdversion2.8.9/version/dependency/dependencies/project
完整代码
package org.tianfan.example;import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.util.concurrent.GenericFutureListener;import java.io.BufferedReader;
import java.io.InputStreamReader;public class RedisClient {String host; // 目标主机int port; // 目标主机端口public RedisClient(String host,int port){this.host host;this.port port;}public void start() throws Exception{EventLoopGroup group new NioEventLoopGroup();try {Bootstrap bootstrap new Bootstrap();bootstrap.group(group).channel(NioSocketChannel.class).handler(new RedisClientInitializer());Channel channel bootstrap.connect(host, port).sync().channel();System.out.println( connected to host : host , port : port);System.out.println( type rediss command to communicate with redis-server or type quit to shutdown );BufferedReader in new BufferedReader(new InputStreamReader(System.in));ChannelFuture lastWriteFuture null;for (;;) {String s in.readLine();if(s.equalsIgnoreCase(quit)) {break;}System.out.print();lastWriteFuture channel.writeAndFlush(s);lastWriteFuture.addListener(new GenericFutureListenerChannelFuture() {Overridepublic void operationComplete(ChannelFuture future) throws Exception {if (!future.isSuccess()) {System.err.print(write failed: );future.cause().printStackTrace(System.err);}}});}if (lastWriteFuture ! null) {lastWriteFuture.sync();}System.out.println( bye );}finally {group.shutdownGracefully();}}public static void main(String[] args) throws Exception{RedisClient client new RedisClient(192.168.56.10,6379);client.start();}}package org.tianfan.example;import io.netty.buffer.ByteBufUtil;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.CodecException;
import io.netty.handler.codec.redis.*;
import io.netty.util.CharsetUtil;
import io.netty.util.ReferenceCountUtil;import java.util.ArrayList;
import java.util.List;public class RedisClientHandler extends ChannelDuplexHandler {// 发送 redis 命令Overridepublic void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) {String[] commands ((String) msg).split(\\s);ListRedisMessage children new ArrayList(commands.length);for (String cmdString : commands) {children.add(new FullBulkStringRedisMessage(ByteBufUtil.writeUtf8(ctx.alloc(), cmdString)));}RedisMessage request new ArrayRedisMessage(children);ctx.write(request, promise);}// 接收 redis 响应数据Overridepublic void channelRead(ChannelHandlerContext ctx, Object msg) {RedisMessage redisMessage (RedisMessage) msg;// 打印响应消息printAggregatedRedisResponse(redisMessage);// 是否资源ReferenceCountUtil.release(redisMessage);}Overridepublic void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {System.err.print(exceptionCaught: );cause.printStackTrace(System.err);ctx.close();}private static void printAggregatedRedisResponse(RedisMessage msg) {if (msg instanceof SimpleStringRedisMessage) {System.out.println(((SimpleStringRedisMessage) msg).content());} else if (msg instanceof ErrorRedisMessage) {System.out.println(((ErrorRedisMessage) msg).content());} else if (msg instanceof IntegerRedisMessage) {System.out.println(((IntegerRedisMessage) msg).value());} else if (msg instanceof FullBulkStringRedisMessage) {System.out.println(getString((FullBulkStringRedisMessage) msg));} else if (msg instanceof ArrayRedisMessage) {for (RedisMessage child : ((ArrayRedisMessage) msg).children()) {printAggregatedRedisResponse(child);}} else {throw new CodecException(unknown message type: msg);}}private static String getString(FullBulkStringRedisMessage msg) {if (msg.isNull()) {return (null);}return msg.content().toString(CharsetUtil.UTF_8);}}package org.tianfan.example;import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.redis.RedisArrayAggregator;
import io.netty.handler.codec.redis.RedisBulkStringAggregator;
import io.netty.handler.codec.redis.RedisDecoder;
import io.netty.handler.codec.redis.RedisEncoder;public class RedisClientInitializer extends ChannelInitializerChannel {Overrideprotected void initChannel(Channel ch) throws Exception {ChannelPipeline pipeline ch.pipeline();pipeline.addLast(new RedisDecoder());pipeline.addLast(new RedisBulkStringAggregator());pipeline.addLast(new RedisArrayAggregator());pipeline.addLast(new RedisEncoder());pipeline.addLast(new RedisClientHandler());}
}结果图
