kevin1

[code="java"]public boolean deleteSchedule(int number, String courseNum) throws SQLException { // TODO Auto-generated method stub boolean flag =false; String sql1 = "delete from SC WHERE...

[b]转自http://javatar.iteye.com/blog/814426[/b][code="java"]//用javassit得到动态代理 public T createJavassistBytecodeDynamicProxy(LoadBalance loadBalance,ConcurrentMap map,Class ifaces){ try{...

[quote]1.自定义类加载器[/quote][code="java"]public interface InterfaceTest { public void test();}[/code][code="java"]public class IntefaceImpl implements InterfaceTest { @Override public ...

整个ThreadPoolExecutor的任务处理有4步操作： 第一步，初始的poolSize < corePoolSize，提交的runnable任务，会直接做为new一个Thread的参数，立马执行第二步，当提交的任务数超过了corePoolSize，就进入了第二步操作。会将当前的runable提交到一个block queue中第三步，如果block queu...

[code="java"]import org.apache.log4j.Logger;import java.lang.management.ManagementFactory;import java.lang.ref.Reference;import java.lang.ref.ReferenceQueue;import java.lang.ref.SoftRefere...

1.json 转为object对象[code="java"]public class CouponMessageConverter implements MessageConverter { private static ObjectMapper objectMapper= new ObjectMapper(); static { objectMapp...

[code="java"]public class ThreadTest { public static void main(String[] args) { ExecutorService exe = Executors.newFixedThreadPool(10); ExecutorCompletionService com = new...

java内省

[b]问题原因：由于HashMap是非线程安全的，在多线程访问时，造成死循环。[/b][b]查找问题方法：[/b]1.[code="java"]top[/code]找出最耗费cpu的进程号 如：273772.[code="java"]top -p 27377 -H[/code]找出此进程下的所有线程，然后找出最耗cpu线程号 如：274333.[code="ja...

[b]1、按字节读取文件内容2、按字符读取文件内容3、按行读取文件内容4、随机读取文件内容 [/b][code="java"]public class ReadFromFile { /** * 以字节为单位读取文件，常用于读二进制文件，如图片、声音、影像等文件。 */ public static void readFile...

1.程序调用 ReportInterface report = new ReportExcel(orderinfolist, "订单数据"); report.setReportStyle(new ReportStyle(Colour.GRAY_25, Alignment.CENTRE)); report.setColumnNames(new String[] { "订单号","下...

:!: package com.longtuo.client.action.admin.job;import java.io.File;import java.util.ArrayList;import java.util.Date;import java.util.List;import jxl.Cell;import jxl.Sheet;import jxl....

import java.awt.Graphics2D;import java.awt.RenderingHints;import java.awt.geom.AffineTransform;import java.awt.image.BufferedImage;import java.awt.image.ColorModel;import java.awt.image.Writ...

1.ArithUtil.java //乘除加减2.CommonUtil.java //随机数生成3.ImageUtil.java //图片缩放(图片等比例缩放为指定大小，空白部分以白色填充)4.OsCacheConfigUtil....

@Aspectpublic class AspectCoupon implements Ordered { @AfterReturning(pointcut = "execution(public * com.longtuo.server.bo.www.CustomerInfoService.saveCustomerInfo(..))", returning = "user")...

创建能够序列化的类 这是一组简单的类。XStream能把这些类的实例转换到XML或是转换回来。 public class Person { private String firstName; private String lastName; private PhoneNumber phonex; private PhoneNumber fax;//构造函数...

1.第一种public class User implements Comparable{ private String name; private Integer order; public String getName() { return name; } public void setName(String ...

import java.util.Properties; Properties props=System.getProperties(); //获得系统属性集 String osName = props.getProperty("os.name"); //操作系统名称 String osArch = props.getProperty("os.arch");...

--------------------------------------------strom set up------------------------------------- 1.set up a zookeeper cluster2.set up ZeroMQ 2.1.7 [code="java"]tar -xzf zeromq-2.1.7.tar.gz...