简单就好-怒的博客

package test;import java.io.File;import java.util.ArrayList;import java.util.List;import jxl.Cell;import jxl.Sheet;import jxl.Workbook;import jxl.write.Label;import jxl.write.W

KeyPairGenerator kpg= KeyPairGenerator.getInstance("RSA");kpg.initialize(1024);KeyPair kp = kpg.generateKeyPair();PublicKey puk=kp.getPublic();PrivateKey prk = kp.getPrivate();//先给密钥对b

/* * 人，权重 */ Map> allot=new HashMap>(); ArrayList servers=new ArrayList(); servers.add(new String[]{"jack","3"}); servers.add(new String[]{"mark","4"}); servers.add(new String[]{"white","7"})

/* * 加密练习(一) */ String a="a"; //待加密串 try { MessageDigest md=MessageDigest.getInstance("md5");//加密方式MD5，sha也行 md.update(a.getBytes()); //加密 byte[] b=md.digest(); //返回字节数组，{00000000,

准备中。。

public static void main(String[] args) { Timer t=new Timer(); t.schedule(new TimerTask(){ int i=0; public void run() { System.out.println(++i); }

javapackage test;import java.sql.CallableStatement;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLExce

package test;public class c {public String cc(String name,String addr){ return "My name is "+name+",I'm working in "+addr;}}Class cl=Class.forName("test.c");   Method m= cl.getMethod("cc",St

附上代码： String name="中国";System.out.println("UTF-8==>ISO-8859-1\t"+new String(name.getBytes("utf-8"),"iso-8859-1"));System.out.println("UTF-8==>GBK\t"+new String(name.getBytes("utf-8"),"gbk"));S

package test;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStre

package test;import java.util.ArrayList;import java.util.HashMap;import java.util.HashSet;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Set;

package demo;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileWriter;import java.io.InputStream;import java.io