<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[a07558751的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/a07558751</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; a07558751]]></copyright><item><title><![CDATA[多线程下HashMap的put方法失效]]></title><link>https://blog.youkuaiyun.com/a07558751/article/details/58143801</link><guid>https://blog.youkuaiyun.com/a07558751/article/details/58143801</guid><author>a07558751</author><pubDate>Mon, 27 Feb 2017 17:03:44 +0800</pubDate><description><![CDATA[在多线程环境下，使用HashMap进行put操作时存在丢失数据的情况，为了避免这种bug的隐患，强烈建议使用ConcurrentHashMap代替HashMap]]></description><category></category></item><item><title><![CDATA[JAVA DecimalFormat格式化Double保留两位小数]]></title><link>https://blog.youkuaiyun.com/a07558751/article/details/54879757</link><guid>https://blog.youkuaiyun.com/a07558751/article/details/54879757</guid><author>a07558751</author><pubDate>Sun, 05 Feb 2017 09:47:58 +0800</pubDate><description><![CDATA[Double d = 123456789.129D;
DecimalFormat f = new DecimalFormat("######0.00");
f.setRoundingMode(RoundingMode.HALF_UP);//保留两位四舍五入
f.format(d);]]></description><category></category></item><item><title><![CDATA[JAVA 图像验证码,可直接输出到浏览器]]></title><link>https://blog.youkuaiyun.com/a07558751/article/details/53214115</link><guid>https://blog.youkuaiyun.com/a07558751/article/details/53214115</guid><author>a07558751</author><pubDate>Fri, 18 Nov 2016 11:09:06 +0800</pubDate><description><![CDATA[import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.Serializabl]]></description><category></category></item><item><title><![CDATA[JAVA WEB 通过response头信息设置浏览器禁止缓存]]></title><link>https://blog.youkuaiyun.com/a07558751/article/details/53213974</link><guid>https://blog.youkuaiyun.com/a07558751/article/details/53213974</guid><author>a07558751</author><pubDate>Fri, 18 Nov 2016 10:59:48 +0800</pubDate><description><![CDATA[response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("expires", -1);]]></description><category></category></item><item><title><![CDATA[JAVA 模拟浏览器请求]]></title><link>https://blog.youkuaiyun.com/a07558751/article/details/51177042</link><guid>https://blog.youkuaiyun.com/a07558751/article/details/51177042</guid><author>a07558751</author><pubDate>Mon, 18 Apr 2016 08:51:13 +0800</pubDate><description><![CDATA[HttpClient httpClient=new DefaultHttpClient();
            HttpGet httpGet=new HttpGet("http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip=27.154.9.27"); 
            HttpResponse respons]]></description><category></category></item></channel></rss>