pfmiles

package test;

import java.security.MessageDigest;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

public class AesEncDec {

pfmiles

public class ComputeUtil {

    /**
     * 根据已有平均值、总量、新增值递推新平均值的公共函数, 计算公式： newAvg = (oldAvg * oldCount)/(oldCount+1) + newVal/(oldCount+1);
     * 另外由于目前的需求是保留2位小数，所以当oldCount大到一定程度时，oldCount/(oldCount+1) 趋近于 1 且 1/(oldCount+1) 趋近于 0，就不必执行某些实际计算以减少不必要操作
     * 
     * @param oldAvg 老平均值
     * @param oldCount 老的总量
     * @param newVal 新值
     * @return 新平均值

pfmiles

package test;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

pfmiles

public class Test {
  public static void main(String... args) {
      TreeLog log = new TreeLog("test");
      log.log("第一层");
      TreeLog log1 = log.addChild("test1");
      log1.log("第二层");
      TreeLog log2 = log1.addChild("test2");
      log2.log("第三层");
      TreeLog log3 = log.addChild("test3");
      log3.log("又一个第二层");

pfmiles

package test;

import java.util.Map;

import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.ToolFactory;
import org.eclipse.jdt.core.formatter.CodeFormatter;
import org.eclipse.jdt.core.formatter.DefaultCodeFormatterConstants;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;

pfmiles

package kilim.tools;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;

pfmiles

L1 cache reference                  0.5 ns
Branch mispredict                   5 ns
L2 cache reference                  7 ns
Mutex lock/unlock                   25 ns
Main memory reference               100 ns
Compress 1K bytes with Zippy        3,000 ns // 3微秒
Send 2K bytes over 1 Gbps network   20,000 ns // 20微秒
Read 1 MB sequentially from memory  250,000 ns // 0.25毫秒
Round trip within same datacenter   500,000 ns // 0.5毫秒
Disk seek                           10,000,000 ns // 10毫秒

pfmiles

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.github.pfmiles</groupId>
	<artifactId>jar.groovy</artifactId>
	<version>1.0-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>jar.groovy</name>

pfmiles

package test;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.UnknownHostException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

pfmiles

public static void makeSettable(Field f) {
        try {
            Field modifiersField = Field.class.getDeclaredField("modifiers");
            modifiersField.setAccessible(true);
            modifiersField.setInt(f, f.getModifiers() & ~Modifier.FINAL);
            f.setAccessible(true);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }