[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; HE0m#
} D$VRE^k
int i1=l; 5>hXqNjP2
int i2=mid+1; JD9=gBN\?
for(int cur=l;cur<=r;cur++){ D58RHgY[
if(i1==mid+1) CtZOIx.;|
data[cur]=temp[i2++]; NHe[,nIV
else if(i2>r) %eGI]!vf
data[cur]=temp[i1++]; w8zr0z
else if(temp[i1] data[cur]=temp[i1++]; R:[#OH.c
else Zh_3ydMD1
data[cur]=temp[i2++]; y[GqV_~?Y
} j.c{%UYj
} QY*F(S,\
3E}j*lo
} <@c@`K
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改进后的归并排序: "*:?m{w5
j}w
package org.rut.util.algorithm.support; 5Ha(i [d
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import org.rut.util.algorithm.SortUtil; uUe#+[bD
^2i$AM1t
/** M|R\[ Zf
* @author treeroot +wZ|g6vMct
* @since 2006-2-2 L1&` 3a?pL
* @version 1.0 V(Cxd.u
*/ 'r1X6?dJ
public class ImprovedMergeSort implements SortUtil.Sort { gLlA'`!
s.a@uR^
private static final int THRESHOLD = 10; ]C{N4Ni^Z
!E,|EdIr
/* # wyjb:Ql
* (non-Javadoc) SZ:R~4 A
* VBW][f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L@J$kqWY
*/ 4L r,}tA
public void sort(int[] data) { uWi pjxS
int[] temp=new int[data.length]; }%<cFi &
mergeSort(data,temp,0,data.length-1); ry+|gCZ
} c?6(mU\x
O%<+&Q7
private void mergeSort(int[] data, int[] temp, int l, int r) { bNHsjx@
int i, j, k; @6-3D/=
int mid = (l + r) / 2; M7#CMLy
if (l == r) G]dHYxG
return; 21] K7
if ((mid - l) >= THRESHOLD) C;ME"4,(
mergeSort(data, temp, l, mid); ?.ofs}
else n.,ZgLx["
insertSort(data, l, mid - l + 1); 4$4Tx9C
if ((r - mid) > THRESHOLD) N9vNSmm
mergeSort(data, temp, mid + 1, r); B5_QH8kt7
else g^U-^f
insertSort(data, mid + 1, r - mid); }IQ![T5
k8cR`5@PK
for (i = l; i <= mid; i++) { "V,dH%&j
temp = data; ^5+7D1>W%
} @f-rS{
for (j = 1; j <= r - mid; j++) { k"cKxzB
temp[r - j + 1] = data[j + mid]; xX~m Fz0C
} NkQain9
int a = temp[l]; >f;oY9 {m
int b = temp[r]; $GVf;M2*
for (i = l, j = r, k = l; k <= r; k++) { Z7Nhb{
if (a < b) { 1Sv$!xX`n
data[k] = temp[i++]; @Q:?,
a = temp; e)i-$0L"
} else { dhuIVBp!!e
data[k] = temp[j--]; }@53*h i(
b = temp[j]; ke'OT>8
} clr]gib
} ^(:na6C
} T n,Ifo3
l_fERp#y
/** RC!T1o~L
* @param data L)Da1<O
* @param l sZokiFJ
* @param i 0JhUncx
*/ 1z3I^gI*i
private void insertSort(int[] data, int start, int len) { 5zt5]zl'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?!bWUVC)_
} Z3iX^
} ,UD5>Ai
} *Oy%($'
} JZ-M<rcC
a0 w
堆排序： `UkPXCC\1
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package org.rut.util.algorithm.support; jF5oc
~ o5h}OU"
import org.rut.util.algorithm.SortUtil; TJb&f<
|U="B4
/** >Wj8[9zf
* @author treeroot }5"19 Go?
* @since 2006-2-2 }iR!uhi#
* @version 1.0 m RtE~~p
*/ 8V:yOq10
public class HeapSort implements SortUtil.Sort{ %W$?*Tm
55`cNZ
/* (non-Javadoc) pB,@<\l %
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &E!-~'|z
*/ N_E:?Jo
public void sort(int[] data) { i)d'l<RA
MaxHeap h=new MaxHeap(); p2Fi(BW*q
h.init(data); 1 BVpv7@
for(int i=0;i h.remove(); T<ekDhlr
System.arraycopy(h.queue,1,data,0,data.length); rW9ULS2d
} ]F,v#6qi
FDRpK5cw
private static class MaxHeap{ $e![^I]`
<' b%
void init(int[] data){ )TgjaR9G
this.queue=new int[data.length+1]; g ??@~\Ov
for(int i=0;i queue[++size]=data; wB0ONH[
fixUp(size); Q,xKi|$r
} tPho4,x$
} |Ok1E
}^B=f_Ag
private int size=0; 8I=migaxP
.e%B'
private int[] queue; D|!^8jHj
_p=O*$b.
public int get() { $+a2CZs!
return queue[1]; d[I}+%{[
} rgg3{bU/
1PJ8O|Zt8
public void remove() { b7bbrR8
SortUtil.swap(queue,1,size--); 20H$9M=}
fixDown(1); bi[gyl#
} &/A?*2
file://fixdown d.uJ}=|
private void fixDown(int k) { /8w _jjW
int j; skP2IMa75
while ((j = k << 1) <= size) { ?yt"
if (j < size %26amp;%26amp; queue[j] j++; #~^Y2-C#
if (queue[k]>queue[j]) file://不用交换 p<3^= 8Y$
break; u9"1%
SortUtil.swap(queue,j,k); O)!MWmr
k = j; &Q"Ox{~W
} n.$wW =
} !&D&Gs
private void fixUp(int k) { 3M{/9rR[
while (k > 1) { +kKfx!
int j = k >> 1; xI7;(o"
if (queue[j]>queue[k]) v='h
break; !fcr3x|Y~M
SortUtil.swap(queue,j,k); :jq
k = j; 2*K _RMr~
} +;Jb)8
} w|>O!]K]
fK|F`F2V
} $z~sN
I2=?H<
} Q1Sf7)
JYB<};,
SortUtil： \$Nx`daFi
F? kW{,*
package org.rut.util.algorithm; `\:92+
`UpZk?k
import org.rut.util.algorithm.support.BubbleSort; n^;:V8k
import org.rut.util.algorithm.support.HeapSort; (!U5B Hnd
import org.rut.util.algorithm.support.ImprovedMergeSort; S/|'ggC
import org.rut.util.algorithm.support.ImprovedQuickSort; =M'y& iz-
import org.rut.util.algorithm.support.InsertSort; }Zwse%;
import org.rut.util.algorithm.support.MergeSort; ruLi "d
import org.rut.util.algorithm.support.QuickSort; 0FFx
import org.rut.util.algorithm.support.SelectionSort; fRe$}KX
import org.rut.util.algorithm.support.ShellSort; I"^ `!8<q
yD+)!q"
/** \KmjA)(
* @author treeroot $g55wGF
* @since 2006-2-2 A`4j=OF\
* @version 1.0 aUN!Sd2,
*/ 2 fX-J
public class SortUtil { P"%i 4-S
public final static int INSERT = 1; xoD5z<<
public final static int BUBBLE = 2; )Aa98Eu?2
public final static int SELECTION = 3; /YWoDHL
public final static int SHELL = 4; B1oy,'
public final static int QUICK = 5; xr)Rx{)3h
public final static int IMPROVED_QUICK = 6; DT_HG|
public final static int MERGE = 7; 'Lft\.C
public final static int IMPROVED_MERGE = 8; kEtYuf^
public final static int HEAP = 9; ?]081l7cd
!Jw
public static void sort(int[] data) { AAkdwo
sort(data, IMPROVED_QUICK); +.Kmpw4
} _^'fp
private static String[] name={ Dcq\1V.e`W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <D4.kM
}; nn"!x|c
MPMJkL$F^
private static Sort[] impl=new Sort[]{ /_?E0r
new InsertSort(), rp.S4;=Q9
new BubbleSort(), z]> 0A
new SelectionSort(), y@J]busU
new ShellSort(), 1sZwW P
new QuickSort(), K3&v6 #]
new ImprovedQuickSort(), e =Vu;
new MergeSort(), dWE[*a\g
new ImprovedMergeSort(), ho2o/>Ef3
new HeapSort() HH3WZ^0>
}; !'Xk=+
o|Obl@CSBD
public static String toString(int algorithm){ 0 ]U ;5
return name[algorithm-1]; AZxx%6
} |HJdpY>Uu
|Sy|E
public static void sort(int[] data, int algorithm) { HFBGM\R02
impl[algorithm-1].sort(data); gk~.u
} y@'8vOh`
Ob?>zsx
public static interface Sort { a<FzHCw
public void sort(int[] data); f3s0.G#l
} x&tad+T
4aGV1u+4
public static void swap(int[] data, int i, int j) { *'vX:n&t
int temp = data; (F]f{8
data = data[j]; ZebXcT ,41
data[j] = temp; BD[XP`[{
} ~d ~$fR
} XQ--8G