随笔分类 -  Java

• URLConnection usage example
  摘要：1 public static String sendGet(String url, String param) { 2 StringBuilder result = new StringBuilder(); 3 BufferedReader br = null; 4 5 try { 6 Str... 阅读全文
  posted @ 2016-05-13 15:30 威尔爪哇 阅读(214) 评论(0) 推荐(0)
• 二叉查找树 BinarySearchTree
  摘要：package com.datastructure.tree; public class BinarySearchTree> { static class BinaryNode { T data; BinaryNode left; BinaryNode right; public BinaryNode... 阅读全文
  posted @ 2016-04-29 14:21 威尔爪哇 阅读(224) 评论(0) 推荐(0)
• JDK源码之AbstractCollection
  摘要：public abstract class AbstractCollection implements Collection { /** * Sole constructor. (For invocation by subclass constructors, typically * implicit.) */ protected Abstract... 阅读全文
  posted @ 2016-03-31 21:23 威尔爪哇 阅读(229) 评论(0) 推荐(0)
• JDK源码之List
  摘要：List<E> extends Collection<E> 1. Query Operation: int size(); boolean isEmpty(); boolean contains(Object o); Iterator<E> iterator(); Object[] toArray( 阅读全文
  posted @ 2016-03-28 17:14 威尔爪哇 阅读(193) 评论(0) 推荐(0)
• JDK源码之Collection
  摘要：Collection<E> 继承 Iterable<E>, 其中有方法iterator()1. Query Operations: int size(); boolean isEmpty(); boolean contains(Object o); Iterator<E> iterator(); O 阅读全文
  posted @ 2016-03-28 16:48 威尔爪哇 阅读(152) 评论(0) 推荐(0)
• 迭代器模式 (Iterator)
  摘要：迭代器模式(Iterator), Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation. (它提供一各方法访问一个 阅读全文
  posted @ 2016-03-27 17:21 威尔爪哇 阅读(226) 评论(0) 推荐(0)
• HIbernate工具类
  摘要：HibernateUtil.java:package com.zwh.user.util;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;public class HibernateUtil { private static SessionFactory sessionFactory = null; static { sessionFactory = new Configuration().config... 阅读全文
  posted @ 2014-03-29 00:27 威尔爪哇 阅读(104) 评论(0) 推荐(0)
• spring mvc 返回内容乱码
  摘要：需要Spring 3.1及以上,用produces来控制@RequestMapping(value={"/{name}"}, method=RequestMethod.GET, produces="application/json;charset=utf-8") 阅读全文
  posted @ 2014-03-29 00:02 威尔爪哇 阅读(150) 评论(0) 推荐(0)
• Jave Web接收参数乱码
  摘要：encodingFilter org.springframework.web.filter.CharacterEncodingFilter encoding UTF-8 encodingFilter /*用于解决POST方式造成的中文乱码问题,编码只能被指定一次，即如果客户端设置了编码，则过滤器不会再设置如果是GET，需要修改 Tomcat根式目录的 conf/server.xml文件中，找，在里面加URIEncoding="utf-8"参数乱码分析： 提交表单时request与response对象encoding与con... 阅读全文
  posted @ 2014-03-28 23:53 威尔爪哇 阅读(221) 评论(0) 推荐(0)
• spring mvc输出Json数据
  摘要：依赖的jar包：jackson-core-asl-1.8.7.jar jackson-mapper-asl-1.8.7.jar org.codehaus.jackson jackson-core-asl 1.9.13 org.codehaus.jackson jackson-mapper-lgpl 1.9.13第一种方式：(ResponseEnity)使用ResponseEnity@Controllerpublic class JSONController { @RequestMapping(value={"/{name}"}, method=Reque... 阅读全文
  posted @ 2014-03-28 12:33 威尔爪哇 阅读(945) 评论(0) 推荐(0)
• 日期工具
  摘要：1. 增加或减少天数publicDate addDay(Date date,int num) { Calendar calendar =Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.DAY_OF_MONTH, num); return calendar.getTime();}2. String与Date相互转换 2.1. String → Date: 2.1.1.Date date =newDate(“2014-01-01”); 2.1.2.SimpleDateFormat sdf =newSimpl 阅读全文
  posted @ 2014-03-28 11:21 威尔爪哇 阅读(154) 评论(0) 推荐(0)
• 随机产生用户名
  摘要：privatestaticfinalchar[] enChar =newchar[]{ 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u',' 阅读全文
  posted @ 2014-03-28 11:18 威尔爪哇 阅读(622) 评论(0) 推荐(0)
• Java定时任务
  摘要：1. 每天定时0点执行Calendar cal =Calendar.getInstance();//每天0点执行cal.set(Calendar.HOUR_OF_DAY,0);cal.set(Calendar.MINUTE,0);cal.set(Calendar.SECOND,0); newTimer().schedule(newTimerTask() {@Override publicvoid run() { // something to do ... }},cal.getTime(),24*60*60*1000);2. Timer基本用法Timer timer =newTimer();. 阅读全文
  posted @ 2014-03-28 11:13 威尔爪哇 阅读(157) 评论(0) 推荐(0)