[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; ,j$Vvz
} )'4k|@8|
int i1=l; #/Eb*2C`b
int i2=mid+1; z5r$M
for(int cur=l;cur<=r;cur++){ o5Q{/
if(i1==mid+1) IzpZwx^3''
data[cur]=temp[i2++]; OdB?_.+$
else if(i2>r) f4PIoZ e
data[cur]=temp[i1++]; YxP@!U9dE,
else if(temp[i1] data[cur]=temp[i1++]; <NuUW9+
else 7=DjI ~
data[cur]=temp[i2++]; u,w:SM@*(
} %y%j*B!%
} Sx8OhUyux
ANps1w#TP
} nTz6LVF
.Fa4shNV
改进后的归并排序: ZAXN6h
Y2?.}ZO
package org.rut.util.algorithm.support; yd?x=|
#jxe%2'Ot
import org.rut.util.algorithm.SortUtil; mljh|[
4-[J@
/** ^)W[l!!<)
* @author treeroot ()3O=!
* @since 2006-2-2 a!u rew#
* @version 1.0 j<)9dEM'
*/ INyk3`FT
public class ImprovedMergeSort implements SortUtil.Sort { )}_a 0bt
XQ~Ke-QW)
private static final int THRESHOLD = 10; 6MxKl D7kl
Yl.0aS
/* npNB{J[
* (non-Javadoc) /*c\qXA5
* x4/M}%h!;B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4X*>H
*/ HVC>9_:]
public void sort(int[] data) { PK4iuU`vh
int[] temp=new int[data.length]; BouTcC
mergeSort(data,temp,0,data.length-1); oun;rMq
} \R3H+W
mb!9&&2-t
private void mergeSort(int[] data, int[] temp, int l, int r) { 17OH]
int i, j, k; = hN !;7G
int mid = (l + r) / 2; }ga@/>Sl&
if (l == r) S*,rGCt'T
return; w#g#8o>'
if ((mid - l) >= THRESHOLD) P';?YV0
mergeSort(data, temp, l, mid); @, Wvvh
else %3$*K\Ai
insertSort(data, l, mid - l + 1); Vb'7>
if ((r - mid) > THRESHOLD) Q;D0<Bv
mergeSort(data, temp, mid + 1, r); U_{Ux2
else [V) L
insertSort(data, mid + 1, r - mid); u3o#{~E/#
_Y[jyD1>
for (i = l; i <= mid; i++) { 56Vb+0J'
temp = data; G2^et$<{uU
} 4NdN<#Lr
for (j = 1; j <= r - mid; j++) { jr3ti>,xV
temp[r - j + 1] = data[j + mid]; w/IZDMBf|
} Vo"RO$%ow*
int a = temp[l]; ^'ryNa;"
int b = temp[r]; zrU{@z$l
for (i = l, j = r, k = l; k <= r; k++) { Usta0Ag
if (a < b) { uZ=NSbYsA
data[k] = temp[i++]; H/"lAXfb
a = temp; v%RP0%%{s
} else { A2nqf^b{#
data[k] = temp[j--]; is@b&V]
b = temp[j]; M_%B|S {
} ~jb"5CX
} ]J#9\4Sq
} vC5n[0
i}~SDY
/** nYJTKU
* @param data l#}.^71+
* @param l SC- $B
* @param i UDL RCS8i
*/ fhCc! \
private void insertSort(int[] data, int start, int len) { KW7UUXL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +/ &_v^sC;
} "$}vP<SM
} "XT"|KF|D
} 1\r|g2Z :
} 9Fr3pRIJ
po}F6m8bX
堆排序： 6AWKLFMV
{N#KkYH{"
package org.rut.util.algorithm.support; DSj(]U~r
UYz0PSV=.
import org.rut.util.algorithm.SortUtil; 8dlw-Q'S
@e'5E^
/** RAp=s
* @author treeroot /P 2[:[w
* @since 2006-2-2 )<xypDQ
* @version 1.0 &< !Ufa&
*/ 2r6'O6v
public class HeapSort implements SortUtil.Sort{ A'%1ZQ33O
hbcuK&
/* (non-Javadoc) \fjMc }'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JO@|*/mL
*/ `w.AQ?p@
public void sort(int[] data) { {Ixg2=E\
MaxHeap h=new MaxHeap(); X7g3
h.init(data); 8Mbeg ,P
for(int i=0;i h.remove(); ~I(Hc.Q
System.arraycopy(h.queue,1,data,0,data.length); x+G0J8cW
} 9RWkm%?
-$,%f?
private static class MaxHeap{ 3bNIZ#`|MB
VG>vn`x>a
void init(int[] data){ Z,.G%"i3C
this.queue=new int[data.length+1]; ?r2#.W
for(int i=0;i queue[++size]=data; $8crN$ye
fixUp(size); bTSL<"(]N
} =GXu 5 8
} aIXdV2QS
n\ Hs@.
private int size=0; >~\89E02
MJ\eh>v&
private int[] queue; %riK+
k'PQ} ,Vb
public int get() { 3.)b4T
return queue[1]; o#[ KS:Y
} Q_vW3xz
U #~;)fZ
public void remove() { :>81BuMvg
SortUtil.swap(queue,1,size--); b,IocD6v;P
fixDown(1); .{S8f#p9T
} efY8M2
file://fixdown 1+7GUSIb
private void fixDown(int k) { ,2]X}&{i
int j; O$ HBO
while ((j = k << 1) <= size) { z7-k`(l4
if (j < size %26amp;%26amp; queue[j] j++; @WKzX41'
if (queue[k]>queue[j]) file://不用交换 99EXo+g
break; [0UGuj
SortUtil.swap(queue,j,k); eVl'\aUd
k = j; J/6`oh?,Q
} |D.O6?v@
} ph2$oO 6,
private void fixUp(int k) { _xLHrT!y
while (k > 1) { &Sp -w?kM
int j = k >> 1; nPUqMn'
if (queue[j]>queue[k]) k'X;ruQ:tF
break; >Ng)k]G
SortUtil.swap(queue,j,k); dz[ bm<T7
k = j; 1w"8~Z:UXV
} g`>og^7g
} R3X{:1{j
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} pZZf[p^s|
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} .O0O-VD+a
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SortUtil： 3u33a"nL8
7}_!
package org.rut.util.algorithm; RB?V7uX
T%R:NQf
import org.rut.util.algorithm.support.BubbleSort; yE} dj)wd
import org.rut.util.algorithm.support.HeapSort; 5yVkb*8HS
import org.rut.util.algorithm.support.ImprovedMergeSort; V|>oGtt7
import org.rut.util.algorithm.support.ImprovedQuickSort; gLsU:aeCT
import org.rut.util.algorithm.support.InsertSort; fj,m
import org.rut.util.algorithm.support.MergeSort; KL'zXkS
import org.rut.util.algorithm.support.QuickSort; <:|3rfm#
import org.rut.util.algorithm.support.SelectionSort; tU/k-W3X
import org.rut.util.algorithm.support.ShellSort; q:8_]Qt
voe7l+Xk
/** F%rHU5CkV
* @author treeroot 8Q)@
* @since 2006-2-2 26n^Dy>}
* @version 1.0 UMN*]_'+;b
*/ (.3'=n|kE
public class SortUtil { CCDDK L]N:
public final static int INSERT = 1; 4ujvD^
public final static int BUBBLE = 2; t_ur&.^SB
public final static int SELECTION = 3; A`6ra}U<
public final static int SHELL = 4; )$Z(|M4
public final static int QUICK = 5; P;]F=m+*V
public final static int IMPROVED_QUICK = 6; [hRU&z;W
public final static int MERGE = 7; :!zC"d9@
public final static int IMPROVED_MERGE = 8; V,ZY*f0
public final static int HEAP = 9; m?[5J)eR
H0"=Vs,n
public static void sort(int[] data) { "gW7<ilw
sort(data, IMPROVED_QUICK); 8%RI7Mg
} D,ly#Nn
private static String[] name={ OVk~N)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uENdI2EY8y
}; Bf4%G,o5
/Y^8SO4
private static Sort[] impl=new Sort[]{ `3q;~ 9
new InsertSort(), v0l_w
new BubbleSort(), $WW)bP d4^
new SelectionSort(), D';eTy Y
new ShellSort(), #:ns64|
new QuickSort(), ;,OfJ'q^
new ImprovedQuickSort(), ;\%sEcpT
new MergeSort(), RD<75]**{
new ImprovedMergeSort(), l|/:Ot
new HeapSort() Z"I/ NGiU
}; MQcr^Y_
Z%gx%$
public static String toString(int algorithm){ >P. 'CU
return name[algorithm-1]; f0Hq8qAF;^
} y:}sD_m0W
99 wc
public static void sort(int[] data, int algorithm) { sNU}n<J-
impl[algorithm-1].sort(data); mE#nU(+Ta
} s* jfMY
BC\S/5~k
public static interface Sort { l!IKUzt)7
public void sort(int[] data); 99iUOw c
} ,R wfp=*E
gmSQcN)
public static void swap(int[] data, int i, int j) { 0NO1M)HQv
int temp = data; o`r(`6@
data = data[j]; YTyX`Y#
data[j] = temp; +iF 1sC_
} `3iQZui
} 1x >iz `A