knight_black_bob的专栏

手写 基础 数据库连接池

r;import java.sql.DriverManager;import java.sql.SQLException;import java.sql.Statement;import java.util.Iterator;import java.util.Vector;public class MyCustomisedPool { /** * <pre> * jdbcDriver = "com.mysql.

windows redis sentinel install

hexo 搭建 自己的博客系统（hexo, github,maupassant）

hexo 搭建Jul 17, 2018 | linux文章目录1. 准备工作1.1. 安装 node1.2. 安装 git1.3. 安装 python2. 安装 hexo2.1. 安装hexo本地2.2. 安装hexo 发步到github准备工作123安装 node安装 git安装 python安装 node去逛网下载 node-v6.11.2-x64.msi，或者去cs

springboot docker jenkins 部署 对比 tomcat

          下载demo          springboot 详解 （二） crud                                             下载demo     springboot 详解 (三） 多数据源                                        下载demo      springboot 详解 (四）redis & filter                                

原创 常用正则表达式

特定用户部署 tomcat

git push 100m error

(215/215), 43.86 MiB | 2.52 MiB/s, done.Total 215 (delta 92), reused 0 (delta 0)remote: Resolving deltas: 100% (92/92), completed with 44 local objects.remote: error: GH001: Large files detected. You may want to try Git Large File Storage - https://

The VMware Authorization Service is not running.

851001: PFXFile encoding decoding failure(Maven编译后证书 变小)

ion: java.io.IOException: invalid characters encountered in base64 data: 63 编译后，证书文件大小从1942 到1939 解决方法：修改mvn resources 的 plugins maven-resources-plugin加上 pfx cer 过滤 ，加上nonFilteredFileExtensions<!--5f39ae17-8c62-4a45-bc43-b32064c9388a:W3s

(在线等。。。)这是出现死锁了吗 ？

.java:150) at java.net.SocketInputStream.read(SocketInputStream.java:121) at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) at java.io.BufferedInputStream.read1(BufferedInputStream.java:286) at java.io.BufferedInputStream.read(Buffe

jvm memcache 问题（求助）

tid=0x000000001c07f000 nid=0x2b3c waiting on condition [0x000000003d0be000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x0000000081e09ef0> (a java.util.concurrent.Syn

hibernate 报错 SQL Error: 1062, SQLState: 23000

ask : ===================== scheduled ====================2018-04-12 10:50:35.164 INFO 10708 --- [cTaskExecutor-5] s.s.govZone.linstener.EventListener : ========================showandshare.spider.govZone.event.CityEvent[source=showandshare.sp

最小栈 三种实现（面试...）

springboot 同步解耦 异步化

mongodb windows install

h D:\soft\MongoDB\data\log\mongodb.log --logappend --dbpath D:\soft\MongoDB\data\db --directoryperdb --serviceName MongoDB -install  出现 就算成功了2018-03-21T14:27:57.734+0800 I CONTROL [main] Trying to install Windows service 'MongoDB'2018-03-21T14:2

java 代码混淆 proguard exception

owandshare\showandshare\showandshare.gateway\showandshare.gateway.netty.dispacther\target\classes, F:\repository\repository\org\springframework\boot\spring-boot-starter-web\1.5.8.RELEASE\spring-boot-starter-web-1.5.8.RELEASE.jar, F:\repository\repository\o

手写 reactor( netty reactor 模型)

SocketChannel; public Dispacther() throws IOException { selector=Selector.open(); serverSocketChannel=ServerSocketChannel.open(); InetSocketAddress inetSocketAddress=new InetSocketAddress(this.host,this.port); server

NoSuchMethodError: javax.servlet.ServletContext.getVirtualServerName()Ljava/lang

verName  17:39:20.040 - A child container failed during startjava.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost [localhost].StandardContext[]] at

八皇后算法 回溯 递归 java

手写 dubbo

onstructor   referpublic class SocketConsumer implements RpcRefer { @Override public <T> T refer(Class<T> interfaceClass, String host, int port) { return (T) Proxy.newProxyInstance(interfaceClass.getCla

dobbo admin 2.5 与 1.8 不兼容

for application context [com.alibaba.citrus.webx.context.WebxComponentsContext@268e369f]: com.alibaba.citrus.springext.support.context.InheritableListableBeanFactory@2047cfe2 INFO config.PropertyPlaceholderConfigurer - Loading properties file from Resour

dubbo java 发布订阅（非spring配置）

w RegistryConfig("localhost:2181"); reg.setProtocol("zookeeper"); ProtocolConfig protocol = new ProtocolConfig(); protocol.setName("dubbo"); protocol.setPort(20880);

okhttp 使用 post

dency><dependency><groupId>com.squareup.okio</groupId><artifactId>okio</artifactId><version>1.7.0</version></dependency>  

原创 异常解决[ asm ClassReader failed to parse class file]

rkplace\DubboDemo\target\classes\com\baoy\base\dao\JdbcTempBaseDao.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\bean\User.class], file [D:\cache\eclipse4mvn-workplace\DubboDemo\target\classes\com\baoy\dao\impl\UserDaoImpl$

动态加载 dubbo spring

原创 Collections,Synchronized

atic List synchronizedList(list l)////public static Map synchronizedMap(Map m)////public static Set synchronizedSet(Set s)////public static SortedMap synchronizedSortedMap(SortedMap sm)////public static SortedSet synchronizedSortedSet(Sorte

原创 join

原创 ReentrantLock,Condition

i++) { queue.put("a"); String string = queue.getString(); System.out.println(string); } } public abstract class MessageQueue<T>{ private Queue<T> queue; private List&lt

原创 ExecutorService

util.concurrent.ScheduledExecutorService;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.TimeUnit;public class ExecutorServiceTest { public static void main(String[] args) { ExecutorService exe =null; exe = E

原创 CountDownLatch

A，它要等待其他4个任务执行完毕之后才能执行，此时就可以利用CountDownLatch来实现这种功能 public static void main(String[] args) throws InterruptedException { ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10); int num = 10; CountDownLatch cdl = new CountDownLatc

原创 Callable 与 Future

ava.util.concurrent.Executors;import java.util.concurrent.Future;public class CallableTest { // 异步 木桶原理 public static void main(String[] args) throws InterruptedException, ExecutionException { ExecutorService executorService = Executors.ne

原创 Semaphore

原创 CyclicBarrier

c void main(String[] args) throws InterruptedException { ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10); int num = 5 ; CyclicBarrier cyclicBarrier = new CyclicBarrier(num); for (int i = 0; i < 5; i++) { newFix

遍历 jdk1.7 jdk1.8 异同点

bin\jdeps.exe false // D:\soft\Java\jdk_1.8.0.0_64\bin\jjs.exe false // D:\soft\Java\jdk_1.8.0.0_64\javafx-src.zip false // D:\soft\Java\jdk_1.8.0.0_64\jre\bin\decora_sse.dll false // D:\soft\Java\jdk_1.8.0.0_64\jre\bin\j2pkcs11.dll

手写 tomcat (nio)

ate int port = 8080; //private ExecutorService exec = Executors.newFixedThreadPool(60); private ExecutorService exec = new ThreadPoolExecutor(60, 60, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(2000)); private Se

手写 springmvc

ceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <org.slf4j-version>1.7.9</org.slf4j-versio

hibernate exception (cannot simultaneously fetch multiple bags)

der.entity.EntityLoader.<init>(EntityLoader.java:119) at org.hibernate.loader.entity.EntityLoader.<init>(EntityLoader.java:71) at org.hibernate.loader.entity.EntityLoader.<init>(EntityLoader.java:54) at org.h

springboot,hibernate,exception no session 问题解决

ication_is_service as applicat3_0_, applicatio0_.application_key as applicat4_0_, applicatio0_.application_name as applicat5_0_, applicatio0_.application_secret as applicat6_0_, applicatio0_.application_type as applicat7_0_, applicatio0_.developer_id as de

tomcat 配置 logstash 日志收集

log4j.appender.logstash.RemoteHost=logstash1.baoyou.comlog4j.appender.logstash.ReconnectionDelay=60000log4j.appender.logstash.LocationInfo=truelog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.P

压测 httpclient 报 Cannot assign requested address