[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; d|iy#hy"_
} Q*XE h
int i1=l; q}FVzahv
int i2=mid+1; aBzszp]l+
for(int cur=l;cur<=r;cur++){ @+WQ ^
if(i1==mid+1) C8L'si
data[cur]=temp[i2++]; +L=*:e\j
else if(i2>r) y8\S}E0
data[cur]=temp[i1++]; @EoZI~
else if(temp[i1] data[cur]=temp[i1++]; )aX2jSp
else v<9&B94z
data[cur]=temp[i2++]; Cz8f1suO4
} 1LY8Ma]E
} c~o+WI Ym
M+!x}$&v
} w%zRHf8C
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改进后的归并排序: nL?oTze*p
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package org.rut.util.algorithm.support; efY8M2
1+7GUSIb
import org.rut.util.algorithm.SortUtil; ,2]X}&{i
O$ HBO
/** z7-k`(l4
* @author treeroot 2:LHy[{5
* @since 2006-2-2 O0PJ6:9P
* @version 1.0 m5D"A D
*/ 9Ok9bC'?8@
public class ImprovedMergeSort implements SortUtil.Sort { (7DXRcr<
O6].*25
private static final int THRESHOLD = 10; {ccIxL /~
<A.W 8b7D
/* 1JEnnqu
* (non-Javadoc) wdvLx
* "3F;cCDv]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OD=!&LM
*/ #pHs@uvO
public void sort(int[] data) { _U{&@}3
int[] temp=new int[data.length]; &J!aw
mergeSort(data,temp,0,data.length-1); 6q>+!kXh
} [/_+>M
HWm#t./
private void mergeSort(int[] data, int[] temp, int l, int r) { 2Cg$,#H
int i, j, k; 4m-I5!=O
int mid = (l + r) / 2; 8by@iQ
if (l == r) Y$-3v.
return; 9,]5v+
if ((mid - l) >= THRESHOLD) ?tg y|
mergeSort(data, temp, l, mid); `O6:t\d@
else k6Cn"2q <
insertSort(data, l, mid - l + 1); gLsU:aeCT
if ((r - mid) > THRESHOLD) fj,m
mergeSort(data, temp, mid + 1, r); KL'zXkS
else <:|3rfm#
insertSort(data, mid + 1, r - mid); {k(eNr,
A*tKF&U5
for (i = l; i <= mid; i++) { 2ij# H ;
temp = data; #?B%Ja% ;W
} N:"C+a(
for (j = 1; j <= r - mid; j++) { ~}DQT>7$
temp[r - j + 1] = data[j + mid]; >`jU`bR@
} T5O _LCIws
int a = temp[l]; NcM>{{8
int b = temp[r]; bY~@}gC**@
for (i = l, j = r, k = l; k <= r; k++) { rx:z#"?I
if (a < b) { 4Tct
data[k] = temp[i++]; V|MY!uV
a = temp; OJ4SbI
} else { Wn|&cG9
data[k] = temp[j--]; xdy^^3"
b = temp[j]; smQVWs>
} _;RVe"tR#
} 23DJV);g8
} s0hBbL0DH
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/** Tx%VU8\?n
* @param data gBk5wk_j|
* @param l sn{AwF%
* @param i Zt E##p
*/ vf~`eT
private void insertSort(int[] data, int start, int len) { u2(eaP8d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W}'WA
} ?nKF6f
} tK%c@gGU9
} YH:8<O,{-
} FnHi(S|A
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堆排序： %G3sjnI;l
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package org.rut.util.algorithm.support; l|/:Ot
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import org.rut.util.algorithm.SortUtil; %"A_!<n@*`
[{&jr]w`|
/** q\9d6u=Gm
* @author treeroot I]}>|
* @since 2006-2-2 8Og3yFx[rt
* @version 1.0 pz doqAVI
*/ o!&WsD
public class HeapSort implements SortUtil.Sort{ J0220 _
z"F*\xa
/* (non-Javadoc) =fyyqb4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eR!G[Cw-
*/ @=uN\) 1
public void sort(int[] data) { $1*3!}_0
MaxHeap h=new MaxHeap(); gH:ArfC
h.init(data); Wf>^bFb"$
for(int i=0;i h.remove(); t0m*PJcF
System.arraycopy(h.queue,1,data,0,data.length); d @rs3Q1z
} t"s5\;IJ
UU@fkk
private static class MaxHeap{ 8}BBOD
PoD^`()FR{
void init(int[] data){ '=cKU0 G#
this.queue=new int[data.length+1]; `EMi0hm&H
for(int i=0;i queue[++size]=data; *i<\iMoW
fixUp(size); S-Ai3)t6
} 5^)_B;.f
} %"Db?
2'{}<9
private int size=0; </E>tMW
^abD!8
private int[] queue; P -Fg^tl
&:#m&,tQ
public int get() { .]76!(fWZ
return queue[1]; =ak7ldA=2
} 9XV^z*E(J
IjZ@U%g@;
public void remove() { !Ua&0s%
SortUtil.swap(queue,1,size--); 0\a8}b||
fixDown(1); hG Apuy
} M$&>5n7
file://fixdown #s+X+fe
private void fixDown(int k) { E8-53"m
int j; YL5>V$i
while ((j = k << 1) <= size) { y@apJ;_R-
if (j < size %26amp;%26amp; queue[j] j++; v:d9o.h
if (queue[k]>queue[j]) file://不用交换 if~rp-\P
break; XT||M)#
SortUtil.swap(queue,j,k); j Selop>N
k = j; L0&S0HG
} ^,7=X8Su
} *_)E6Y?9
private void fixUp(int k) { i7eI=f-Q
while (k > 1) { W(&6
int j = k >> 1; 9qH[o?]
if (queue[j]>queue[k]) 3ps,uozj
break; C{Blqf3V0
SortUtil.swap(queue,j,k); D@vMAW
k = j; #@_1fE
} ^Rmoz1d
} SFO&=P:U
D<nxr~pQ
} !A[S6-18%-
c#\-%h
} ac6*v49
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SortUtil： iVeQ]k(u
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package org.rut.util.algorithm; .5g}rxO8
7c::Qf[|
import org.rut.util.algorithm.support.BubbleSort; oBw}hH,hp
import org.rut.util.algorithm.support.HeapSort; n>llSK
import org.rut.util.algorithm.support.ImprovedMergeSort; +"L$ed(=nJ
import org.rut.util.algorithm.support.ImprovedQuickSort; "=A|K~b
import org.rut.util.algorithm.support.InsertSort; B| Q6!
import org.rut.util.algorithm.support.MergeSort; rl|Q)A{
import org.rut.util.algorithm.support.QuickSort; ~t9Mh^gij
import org.rut.util.algorithm.support.SelectionSort; ? ICDIn
import org.rut.util.algorithm.support.ShellSort; /J;]u3e|
k!13=Gh
/** fq Y1ggL
* @author treeroot 3'@&c?Fye
* @since 2006-2-2 #Wx=v$"
* @version 1.0 nW&$~d
*/ ylkqhs&
public class SortUtil { d;g-3Pf
public final static int INSERT = 1; (9z|a,
public final static int BUBBLE = 2; ^Fp=y,D
public final static int SELECTION = 3; ,o)4p\nV
public final static int SHELL = 4; VR v02m5
public final static int QUICK = 5; AM?Ec1S #a
public final static int IMPROVED_QUICK = 6; 5bBCpNa
public final static int MERGE = 7; DR{]sG
public final static int IMPROVED_MERGE = 8; 6S_y%8Fv&[
public final static int HEAP = 9; 0UD"^zgY
Dqr9Vv
public static void sort(int[] data) { 6UI>GQ
sort(data, IMPROVED_QUICK); B"[{]GP BY
} bm6hZA|
private static String[] name={ <_f`$z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vXf:~G]
}; (txt8q
i+RD]QL
private static Sort[] impl=new Sort[]{ 'Q`C[*c
new InsertSort(), X X&K=<,Ja
new BubbleSort(), ux&:Rw\
new SelectionSort(), ) MBS
new ShellSort(), "VQ|Ed
new QuickSort(), MHNe>C-!q
new ImprovedQuickSort(), t 2G1[j!
new MergeSort(), u#VweXyU
new ImprovedMergeSort(), 8GW ut=D
new HeapSort() SW=aHM
}; *2#FRA#q
P#F_>GB
public static String toString(int algorithm){ k-]xSKG
return name[algorithm-1]; ] ?9t-
} c85O_J
um}N%5GAa
public static void sort(int[] data, int algorithm) { 44<v9uSK
impl[algorithm-1].sort(data); _r7=&oL.Q
} @e={Wy+Vm(
uOb2npPj
public static interface Sort { )BB%4=u@~.
public void sort(int[] data); [>wzl"cHW
} Pzptr%{
W60Q3
public static void swap(int[] data, int i, int j) { x{2o[dK4}
int temp = data; iBS0rT_
data = data[j]; 1>yha j(K
data[j] = temp; taixBNv
} x57'Cg \
} -sx-7LKi