<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[linkkb的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/linkkb</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; linkkb]]></copyright><item><title><![CDATA[ElasticSearch windows下的安装]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/82805145</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/82805145</guid><author>linkkb</author><pubDate>Fri, 21 Sep 2018 17:50:00 +0800</pubDate><description><![CDATA[ElasticSearch介绍

ES是一个基于Lucene的分布式全文搜索服务器，和SQL Server的全文索引（Fulltext Index）有点类似，都是基于分词和分段的全文搜索引擎，具有分词，同义词，词干查询的功能，但是ES天生具有分布式和实时的属性。

例：多用于搜索引擎自动补全功能



 

windows下的 ElasticSearch安装

一、安装Java SE环境

在安装...]]></description><category></category></item><item><title><![CDATA[Linux  SVN安裝]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/80406081</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/80406081</guid><author>linkkb</author><pubDate>Thu, 31 May 2018 09:53:59 +0800</pubDate><description><![CDATA[通过yum命令安装svnserve，命令如下：yum -y install subversion选择在var路径下创建版本库，当前处于根目录下，一次性创建如下：mkdir /var/svn/svnrepos在第二步建立的路径基础上，创建版本库，命令如下svnadmin create /var/svn/svnrepos/xxxx   （xxxx为你预期的版本库名称，可自定义）创建成功后，进入xxx目...]]></description><category></category></item><item><title><![CDATA[web.xml不同版本之间头信息的区别]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/80175679</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/80175679</guid><author>linkkb</author><pubDate>Thu, 03 May 2018 10:00:29 +0800</pubDate><description><![CDATA[一、Servlet 2.3 [html] view plain copy&amp;lt;!DOCTYPE web-app PUBLIC   &quot;-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN&quot;   &quot;http://java.sun.com/dtd/web-app_2_3.dtd&quot; &amp;gt;     &amp;lt;web-app&amp;gt;    &amp;lt;d...]]></description><category></category></item><item><title><![CDATA[史上最全web.xml配置文件元素详解]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/80169606</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/80169606</guid><author>linkkb</author><pubDate>Wed, 02 May 2018 17:48:13 +0800</pubDate><description><![CDATA[史上最全web.xml配置文件元素详解一、web.xml配置文件常用元素及其意义预览 1 &amp;lt;web-app&amp;gt;
 2 
 3      &amp;lt;!--定义了WEB应用的名字--&amp;gt;
 4      &amp;lt;display-name&amp;gt;&amp;lt;/display-name&amp;gt;
 5 
 6      &amp;lt;!--声明WEB应用的描述信息--&amp;gt;
 7      &amp;lt;de...]]></description><category></category></item><item><title><![CDATA[liux 安装 mysql]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/80104647</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/80104647</guid><author>linkkb</author><pubDate>Fri, 27 Apr 2018 11:11:08 +0800</pubDate><description><![CDATA[1. wget  -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm     下载rpm文件2.yum -y install mysql57-community-release-el7-10.noarch.rpm                                          安装上...]]></description><category></category></item><item><title><![CDATA[Java四种线程池 ExecutorService]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/80005857</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/80005857</guid><author>linkkb</author><pubDate>Thu, 19 Apr 2018 15:39:24 +0800</pubDate><description><![CDATA[Java四种线程池newCachedThreadPool,newFixedThreadPool,newScheduledThreadPool,newSingleThreadExecutor1、new Thread的弊端执行一个异步任务你还只是如下new Thread吗？Java 1234567new Thread(new Runnable() {  @Overridepublic void run...]]></description><category></category></item><item><title><![CDATA[Java将Map拼接成“参数=值&参数=值”]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/79596762</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/79596762</guid><author>linkkb</author><pubDate>Sat, 17 Mar 2018 22:53:29 +0800</pubDate><description><![CDATA[Java将Map拼接成“参数=值&amp;amp;参数=值”　　把一个map的键值对拼接成“参数=值&amp;amp;参数=值”即“username=angusbao&amp;amp;password=123456”这种形式方便传递，尤其是在接口调用的时候，这种方式使用的更加普遍，比如http请求的get方式，如何用java对其进行解决呢？　　代码如下：　　/** 　　* 把数组所有元素排序，并按照“参数=参数值”的模式...]]></description><category></category></item><item><title><![CDATA[【SSM】Eclipse使用Maven创建Web项目+整合SSM框架]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/79478781</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/79478781</guid><author>linkkb</author><pubDate>Thu, 08 Mar 2018 00:10:11 +0800</pubDate><description><![CDATA[一、准备环境：maven：apache-maven-3.2.3jdk：jdk1.8.0_25tomcat：tomcat-6.0.37二、配置Maven、jdk1、Window——&amp;gt;Preferences——&amp;gt;Maven——&amp;gt;设置自己的Settings2、Window——&amp;gt;Preferences——&amp;gt;Java——&amp;gt;Installed JREs——&amp;gt;Add配置...]]></description><category></category></item><item><title><![CDATA[Maven安装与配置]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/79475867</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/79475867</guid><author>linkkb</author><pubDate>Wed, 07 Mar 2018 19:45:57 +0800</pubDate><description><![CDATA[Maven安装与配置一、需要准备的东西1. JDK2. Eclipse3. Maven程序包二、下载与安装1. 前往https://maven.apache.org/download.cgi下载最新版的Maven程序：2. 将文件解压到D:\Program Files\Apache\maven目录下:3. 新建环境变量MAVEN_HOME，赋值D:\Program Files\Apache\mav...]]></description><category></category></item><item><title><![CDATA[json  list字符串转  强转成list （泛用）]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/79050413</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/79050413</guid><author>linkkb</author><pubDate>Sat, 13 Jan 2018 11:50:09 +0800</pubDate><description><![CDATA[List> list= JSONObject.parseObject(map.get("orderInfoList").toString(), new TypeReference>>(){});]]></description><category></category></item><item><title><![CDATA[JsonString 转 bean实体]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/79049876</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/79049876</guid><author>linkkb</author><pubDate>Sat, 13 Jan 2018 10:35:50 +0800</pubDate><description><![CDATA[package com.ttd.utiliy;


import java.util.HashMap;
import java.util.Map;


import javax.servlet.http.HttpServletRequest;


import net.sf.json.JSONObject;


@SuppressWarnings("unchecked")]]></description><category></category></item><item><title><![CDATA[map  bean实体  互转]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/79049870</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/79049870</guid><author>linkkb</author><pubDate>Sat, 13 Jan 2018 10:35:04 +0800</pubDate><description><![CDATA[import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
imp]]></description><category></category></item><item><title><![CDATA[Java 环境下使用 AES 加密的特殊问题处理]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78904801</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78904801</guid><author>linkkb</author><pubDate>Tue, 26 Dec 2017 17:39:37 +0800</pubDate><description><![CDATA[1. 密钥长度问题

    默认 Java 中仅支持 128 位密钥，当使用 256 位密钥的时候，会报告密钥长度错误

Invalid AES key length


   你需要下载一个支持更长密钥的包。这个包叫做 Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files 6，]]></description><category></category></item><item><title><![CDATA[java的long类型转为json格式后,js中精度丢失问题]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78779164</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78779164</guid><author>linkkb</author><pubDate>Tue, 12 Dec 2017 09:59:27 +0800</pubDate><description><![CDATA[java的long类型转为json格式后,js中精度丢失问题




环境:
使用spring mvc 配置json消息转换器为MappingJackson2HttpMessageConverter
发现long类型的数据到了js端会丢失精度
解决方案:
将long统一转为string类型
方法一:
数据层转换,由于项目使用了spring 的jdbc模版类,查询时调用了spr]]></description><category></category></item><item><title><![CDATA[Java中BigDecimal的8种舍入模式]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78464980</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78464980</guid><author>linkkb</author><pubDate>Tue, 07 Nov 2017 10:17:43 +0800</pubDate><description><![CDATA[不同舍入模式下的舍入操作汇总: 根据给定的舍入模式将输入数字舍入为一位数的结果输入数字UPDOWNCEILINGFLOORHALF_UPHALF_DOWNHALF_EVENUNNECESSARY5.56565656抛出 ArithmeticException2.53232322抛出 ArithmeticException1.62121222抛出 ArithmeticException1.12121...]]></description><category></category></item><item><title><![CDATA[JSON强转 <T>任意类]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78330439</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78330439</guid><author>linkkb</author><pubDate>Tue, 24 Oct 2017 15:49:26 +0800</pubDate><description><![CDATA[import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;



阿里巴巴提供的JSON类
T num= JSONObject.parseObject("String", new TypeReference(){})


List> list= JSONObject.pars]]></description><category></category></item><item><title><![CDATA[Tomcat启动速度慢的优化方法]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78217780</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78217780</guid><author>linkkb</author><pubDate>Thu, 12 Oct 2017 17:47:39 +0800</pubDate><description><![CDATA[今天启动Tomcat，发现启动很慢，需要几分钟，这个问题值得重视，所以就去查看日志，发现耗时是session引起随机数问题导致的。Tomcat的Session ID通过SHA1算法计算得到的，计算Session ID的时候必须有1个秘钥，为了提高安全性Tomcat在启动的时候通过随机数生成秘钥。

一、环境介绍

系统版本：CentOS 7.2
软件版本：Tomcat 8

二、日志]]></description><category></category></item><item><title><![CDATA[枚举enum 赋值 int]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78206854</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78206854</guid><author>linkkb</author><pubDate>Wed, 11 Oct 2017 18:33:46 +0800</pubDate><description><![CDATA[public enum AAXXCC {
xx(10), xx(11), xx(12), xx(13), xx(14), xx(15),xx(16), xx(17), xx(18), xx(19), xx(20), xx(21), xx(22) {
@Override
public boolean isRest() {
return true;
}
},
SUN(0) {
@Ove]]></description><category></category></item><item><title><![CDATA[生成唯一订单号 BY uuid]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78206846</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78206846</guid><author>linkkb</author><pubDate>Wed, 11 Oct 2017 18:32:39 +0800</pubDate><description><![CDATA[public static String getSerialIdByUUId() {
int machineId = 1;//最大支持1-9个集群机器部署
int hashCodeV = UUID.randomUUID().toString().hashCode();
if(hashCodeV 
hashCodeV = - hashCodeV;
}
// 0 代表前面补充0     ]]></description><category></category></item><item><title><![CDATA[Tomcat在Linux上的安装与配置]]></title><link>https://blog.youkuaiyun.com/linkkb/article/details/78206824</link><guid>https://blog.youkuaiyun.com/linkkb/article/details/78206824</guid><author>linkkb</author><pubDate>Wed, 11 Oct 2017 18:30:19 +0800</pubDate><description><![CDATA[Tomcat在Linux上的安装与配置



    以下使用的Linux版本为: Redhat Enterprise Linux 7.0 x86_64，Tomcat版本为tomcat-7.0.54.


1.下载JDK与Tomcat.
    jdk下载地址:
    http://www.oracle.com/technetwork/java/javase/downloads]]></description><category></category></item></channel></rss>