Java 入门多线程之多线程返回用户ID（二）

我就是我 2022-07-21 05:44 194阅读 0赞

产生随机码 数据栈

package synPack;
    
    import java.util.ArrayList;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.List;
    import java.util.Stack;
    import java.util.concurrent.Callable;
    
    public class RandomStack implements Callable<List<Integer>>{
    
    	// st : random stack
    	// thrnum,less than thrnum then refresh stack
    	// reqnum,request number for id
    	// bunnum,the num of st created once
    	// bits,the digits(wei`shu) of root which can calculate maxnum
    	// times,the num refresh st per day
    	// apdstr : the appended for uniform str
    	private static int times;	
    	private static Stack<Integer> st;
    	private static Calendar date;	
    	private static int day;
    	
    	private List<Integer> res;
    	private int thrNum,reqNum,bunNum,maxNum,root,bits;
    	private String apdstr;
    
    	public List<Integer> getRes() {
    		return res;
    	}	
    	public int getReqNum() {
    		return reqNum;
    	}
    	public static Stack<Integer> getRTObj() {
    		return st;
    	}
    	
    	static{
    		if(st == null){
    			st = new Stack<Integer>();
    			// if(day == this.Calendar.DAY) then time != and root readd
    			times = 0;
    			date = Calendar.getInstance();
    			day = date.get(Calendar.DAY_OF_MONTH);
    		}
    	}
    	
    	RandomStack(int thrNum,int reqNum,int bunNum,int bits){		
    		this.root = -1;
    		this.bits = bits;
    		this.thrNum = thrNum;
    		this.reqNum = reqNum;
    		this.bunNum = bunNum;
    		this.res = new ArrayList<Integer>();
    		
    		int i=0;
    		while(i++<bits){
    			apdstr = "0"+apdstr;
    		} 
    	}
    
    	public List<Integer> call(){
    		return getRandomNum();
    	}
    	
    	
    	public void getRoot(){
    		if (times == 0){
    			times++;
    			maxNum = (int) Math.pow(10, bits);
    			root = (int)((maxNum-1)*Math.random()+0);
    		}
    		else{
    			times++;
    			root = root+bunNum+1;
    			if(root >= maxNum)
    				root = root-maxNum;
    		}
    	}
    	
    	public void getRandomStack(){
    		this.getRoot();
    		while(!st.isEmpty()){
    			st.pop();
    		}
    		int upp=0;
    		int low=0;
    		st.push(root);
    		for(int i=0; i<bunNum/2; i++){
    			upp = root+i+1;
    			low = root-i-1;
    			if(upp >= maxNum)
    				st.push(upp-maxNum);
    			else{
    				if(upp < 0)
    					st.push(upp+maxNum);
    				else
    					st.push(upp);
    			}
    			if(low >= maxNum)
    				st.push(low-maxNum);
    			else{
    				if(low < 0)
    					st.push(low+maxNum);
    				else
    					st.push(low);
    			}
    		}
    	}
    	
    	public synchronized List<Integer> getRandomNum(){
    		if(bunNum < reqNum){
    			System.err.println("Your request number is much more than we can offer !");
    			return null;
    		}
    		if(st.size()<reqNum || st.size()<thrNum || st.isEmpty()){
    			this.getRandomStack();			
    		}
    		Calendar cur = Calendar.getInstance();
    		if(cur.get(Calendar.DAY_OF_MONTH) != day){
    			times = 0;
    			this.getRandomStack();			
    		}
    //		System.out.println(st);
    		int i = reqNum;
    		while(i-- > 0){
    			res.add(st.get(i));
    			st.pop();
    		}
    //		System.out.println(res);
    		return res;
    	}
    }

根据数据栈，实现 用户 ID 的拼接

package synPack;
    
    import java.util.ArrayList;
    import java.util.Calendar;
    import java.util.List;
    import java.util.concurrent.FutureTask;
    
    import jdk.nashorn.internal.ir.RuntimeNode.Request;
    
    public class UIDProducer {
    	
    	private RandomStack randomStack;
    	private String usrInfA,usrInfB;
    	private List<String> lStrings;
    	private List<Integer> resList;
    	private String stry,strm,strd;
    	private static Calendar date;
    	private Thread thread;
    	private FutureTask<List<Integer>> futureTask;
    	
    	public List<Integer> getResList() {
    		return resList;
    	}
    	public List<String> getlStrings() {
    		return lStrings;
    	}
    	
    	public UIDProducer(int thrNum,int reqNum,int bunNum,
    			int bits, String usrInfA, String usrInfB) {
    		// TODO Auto-generated constructor stub
    //		FutureTask<List<Integer>> f0 = new FutureTask<List<Integer>>(new RandomStack(3000, 13000, 15000, 6));
    //		Thread t0 = new Thread(f0);
    		randomStack = new RandomStack(thrNum, reqNum, bunNum, bits);
    		futureTask = new FutureTask<List<Integer>>(randomStack);
    		thread = new Thread(futureTask);
    		
    		thread.start();
    		
    		lStrings = new ArrayList<String>();
    		this.usrInfA = usrInfA;
    		this.usrInfB = usrInfB;	
    		
    		date = Calendar.getInstance(); 
    		
    		stry = String.valueOf(date.get(Calendar.YEAR)).substring(2, 4);
    		strm = String.valueOf(date.get(Calendar.MONTH)+1);
    		strd = String.valueOf(date.get(Calendar.DAY_OF_MONTH));
    		if(date.get(Calendar.DAY_OF_MONTH)<10)
    			strd = "0"+strd;		
    		if(date.get(Calendar.MONTH)+1<10)
    			strm = strm+"0";
    	}
    	
    	public List<String> getList(){
    		if(resList == null){
    			return null;
    		}
    		int randNum;
    		String str;
    		for(int i=0; i<randomStack.getReqNum(); i++){
    			randNum = resList.get(i);
    			str = String.valueOf(randNum);
    			if((randNum&1) == 0){
    				lStrings.add(strd+usrInfA+stry+str);
    			}
    			else{
    				lStrings.add(str+stry+usrInfB+strm);
    			}
    		}
    		return lStrings;
    	}
    }

多线程实现 用户 ID 获取

package synPack;
    
    import java.util.List;
    import java.util.concurrent.ExecutionException;
    import java.util.concurrent.FutureTask;
    
    public class TestDemo {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		
    //		RandomStack r1 = new RandomStack(3, 1, 5, 2);
    //		r1.run();		
    //		try {
    //			Thread.sleep(1000);
    //		} catch (InterruptedException e) {
    //			// TODO Auto-generated catch block
    //			e.printStackTrace();
    //		}
    //		System.out.println(r1.res);
    //		RandomStack r2 = new RandomStack(3, 1, 5, 2);
    //		r2.run();
    //		System.out.println(r2.res);
    		
    //		// UIDProducer(thrNum, reqNum, bunNum, bits, usrInfA, usrInfB)
    //		RandomStack r0 = new RandomStack(3000, 13000, 15000, 6);
    //		FutureTask<List<Integer>> f0 = new FutureTask<List<Integer>>(r0);
    //		Thread t0 = new Thread(f0);
    //		RandomStack r1 = new RandomStack(3000, 13000, 15000, 6);
    //		FutureTask<List<Integer>> f1 = new FutureTask<List<Integer>>(r1);
    //		Thread t1 = new Thread(f1);
    //		Thread t2 = new Thread(new FutureTask<List<Integer>>
    //		(new RandomStack(3000, 14000, 15000, 6)));
    //		Thread t3 = new Thread(new FutureTask<List<Integer>>
    //		(new RandomStack(3000, 12000, 15000, 6)));
    //
    		System.out.println(r0.call());
    //		System.out.println(r0.getRTObj().size());
    //		t0.start();
    //		try {
    //			Thread.sleep(300);
    //		} catch (InterruptedException e) {
    //			// TODO Auto-generated catch block
    //			e.printStackTrace();
    //		}
    //		System.out.println(r0.getRTObj().size());
    //		System.out.println(r1.getRTObj().size());
    //		System.err.println(System.currentTimeMillis());
    		System.out.println(r1.call());
    //		t1.start();
    //		System.err.println(System.currentTimeMillis());
    		System.out.println(r2.call());
    //		t2.start();
    //		System.err.println(System.currentTimeMillis());
    		System.out.println(r3.call());
    //		t3.start();
    //		System.err.println(System.currentTimeMillis());
    		
    //		try {
    //			System.out.println(f0.get());
    //		} catch (InterruptedException | ExecutionException e) {
    //			// TODO Auto-generated catch block
    //			e.printStackTrace();
    //		}
    		
    //		UIDProducer uidProducer = new UIDProducer(thrNum, reqNum, bunNum, bits, usrInfA, usrInfB);
    		UIDProducer uidPa = new UIDProducer(30, 77705, 77710, 10, "a", "b");
    //		System.out.println(uidPa.getList());
    		uidPa.getList();
    		System.err.println(System.currentTimeMillis());
    		UIDProducer uidPb = new UIDProducer(30, 77705, 77710, 10, "a", "b");
    //		System.out.println(uidPb.getList());
    		uidPb.getList();
    		System.err.println(System.currentTimeMillis());
    		UIDProducer uidPc = new UIDProducer(30, 77705, 77710, 10, "a", "b");
    //		System.out.println(uidPc.getList());
    		uidPc.getList();
    		System.err.println(System.currentTimeMillis());
    		UIDProducer uidPd = new UIDProducer(30, 77705, 77710, 10, "a", "b");
    //		System.out.println(uidPd.getList());
    		uidPd.getList();
    		System.err.println(System.currentTimeMillis());
    	}
    }