[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; 4WQ 96|F
} ;S+"z;$m
int i1=l; QFEc?sEe
int i2=mid+1; T{ /\q 5
for(int cur=l;cur<=r;cur++){ kgRgHkAH~
if(i1==mid+1) B5va4@
data[cur]=temp[i2++]; e?dR'*-z
else if(i2>r) 6Kd,(DI
data[cur]=temp[i1++]; .~4DlT
else if(temp[i1] data[cur]=temp[i1++]; QST-!`]v
else SwhArvS
data[cur]=temp[i2++]; e\]CZ5hs3
} 0a)LZp|
} DZ5h<1
_[J>GfQd
} /6p7k
~&_BT`a
改进后的归并排序: vslN([@JR
L$f:D2Ei
package org.rut.util.algorithm.support; Fi#b0S
U9q6m3#$
import org.rut.util.algorithm.SortUtil; Za1VJ5-
-O[9{`i]
/** t$*CyYb{@
* @author treeroot y1Yrf,E m=
* @since 2006-2-2 Hp3T2|uL
* @version 1.0 X(K5>L>
*/ )<%IY&\
public class ImprovedMergeSort implements SortUtil.Sort { b_oUG_B3]
"H)D~K~*
private static final int THRESHOLD = 10; z)pp{
rh(77x1|(G
/* ZRoOdo94
* (non-Javadoc) M{U7yE6*j*
* MY>o8A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u-~?ylh
*/ @!Q\| <
public void sort(int[] data) { ZN(@M@}
int[] temp=new int[data.length]; I~7eu&QZ
mergeSort(data,temp,0,data.length-1); &?yVLft
} irzWk3@:
VXu1YxY
private void mergeSort(int[] data, int[] temp, int l, int r) { >J@hqW
int i, j, k; }9(:W</}
int mid = (l + r) / 2; a(eUdGJ
if (l == r) mybjcsV4
return; ZCCwx71j
if ((mid - l) >= THRESHOLD) FtxmCIVIV~
mergeSort(data, temp, l, mid); bA3pDt).p
else .tRWL!
insertSort(data, l, mid - l + 1); JUC62s#_z
if ((r - mid) > THRESHOLD) ;=?KQq f
mergeSort(data, temp, mid + 1, r); Kyq/o-
else n4Eqm33
insertSort(data, mid + 1, r - mid); z8n]6FDiE
=Ev*Q[
for (i = l; i <= mid; i++) { q|wwfPez7
temp = data; R9V v*F]m@
} 5y|/}D>
for (j = 1; j <= r - mid; j++) { a`uHkRX )U
temp[r - j + 1] = data[j + mid]; ,;-55|o\V
} ]abox%U=%
int a = temp[l]; _l!TcH+e
int b = temp[r]; +;wu_CQu
for (i = l, j = r, k = l; k <= r; k++) { <Q?X'.
if (a < b) { <YBA 7i
data[k] = temp[i++]; HESORa;
a = temp; >2?O-WXe
} else { 0=Z_5.T>
data[k] = temp[j--]; D<*#. >
b = temp[j]; 66l$}+|Zzc
} xk8P4`;d$
} &+V|Ldh
} /I3>u
kkE1CHY
/** 7tr;adjs
* @param data c_^-`7g
* @param l 9hIcnPu
* @param i O(oGRK<xM
*/ ~Fd<d[b?
private void insertSort(int[] data, int start, int len) { eZ~ZWb,%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rZv5>aEI
} cA{zyq26
} geRD2`3;
} .I&]G
} <UcbBcW,
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堆排序： nWAx!0G
DU/WB
package org.rut.util.algorithm.support; MH,vn</Uw
@ \(*pa
import org.rut.util.algorithm.SortUtil; Dk XB
L5tSS=
/** 5w+X
* @author treeroot LE:nmo
* @since 2006-2-2 kmXaLt2Z
* @version 1.0 .oFkx*Ln
*/ >>C(y?g
public class HeapSort implements SortUtil.Sort{ HO(9)sK
^q0Ox&X
/* (non-Javadoc) $pm5G} .
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z@I.socA
*/ k6vY/)-S
public void sort(int[] data) { v&GBu
MaxHeap h=new MaxHeap(); ;8 D31OT
h.init(data); k )T;WCia
for(int i=0;i h.remove(); sKT GZA
System.arraycopy(h.queue,1,data,0,data.length); )0I;+9:D=
} '8 ~E
kU5chltGF
private static class MaxHeap{ <ZV !fn
:3# t;
void init(int[] data){ ;-1yG@KG
this.queue=new int[data.length+1]; ,nELWzz%{
for(int i=0;i queue[++size]=data; nRmZu\(Ow|
fixUp(size); A9[ELD>p
} x;cjl6Acm
} x\m !3
SBY
private int size=0; gL+8fX2G6
"=uphBZog
private int[] queue; eh-/,vmRa
HV^*_
public int get() { +8 avA:o
return queue[1]; $DOBC@xxzT
} b{KpfbxcI
9oL/oL-J/
public void remove() { H"H&uA9"
SortUtil.swap(queue,1,size--); 6jiz$x
fixDown(1); jMvWS71
} B|-E3v:f4
file://fixdown h<50jnH!
private void fixDown(int k) { A7!=`yA$
int j; }l/!thzC
while ((j = k << 1) <= size) { h4 s!VK1X
if (j < size %26amp;%26amp; queue[j] j++; R&BbXSIDX
if (queue[k]>queue[j]) file://不用交换 vt" 7[!O
break; h9,ui^#d$
SortUtil.swap(queue,j,k); {%K(O$H#
k = j; %z&=A%'a
} ]R8}cbtU
} ROr..-[u
private void fixUp(int k) { Pd@y+|
while (k > 1) { ~7tG%{t%
int j = k >> 1; u:Q_XXT5
if (queue[j]>queue[k]) S"iz fQ@
break; UGNFWZ c
SortUtil.swap(queue,j,k); T=|oZ
k = j; 'G!w0yF
} \h DH81L
} n"'1.
p-H q\DP
} ).0h4oHSj
R!i9N'gGG(
} :_%
ON{&-
SortUtil： ceDe!Iu
H=OKm
package org.rut.util.algorithm; xA DjQ%B
.R/`Y)4
import org.rut.util.algorithm.support.BubbleSort; |@]`" k
import org.rut.util.algorithm.support.HeapSort; }%B^Vl%ZZ
import org.rut.util.algorithm.support.ImprovedMergeSort; HY.?? 5MH
import org.rut.util.algorithm.support.ImprovedQuickSort; L=u>}?!,Fj
import org.rut.util.algorithm.support.InsertSort; UC)-Fd
import org.rut.util.algorithm.support.MergeSort; T&Y?IE}
import org.rut.util.algorithm.support.QuickSort; 3_JxpQg
import org.rut.util.algorithm.support.SelectionSort; E"e<9
import org.rut.util.algorithm.support.ShellSort; $=/.oh
5+<<:5_6l
/** Zb)j2Xgl
* @author treeroot []D@"Bz
* @since 2006-2-2 $okGqu8z.O
* @version 1.0 "=0#pH1o
*/ ppt`5F O
public class SortUtil { R^Wed
public final static int INSERT = 1; sEj?,1jk
public final static int BUBBLE = 2; b$kCyOg
public final static int SELECTION = 3; ULq#2l
public final static int SHELL = 4; d>z?JDt
public final static int QUICK = 5; =6Dz<Lq
public final static int IMPROVED_QUICK = 6; Z[Gs/D
public final static int MERGE = 7; E"D+CD0
public final static int IMPROVED_MERGE = 8; Sq,ZzMw
public final static int HEAP = 9; 4@D 8{?$~Q
N-fGc?E
public static void sort(int[] data) { \e%H5Wx
sort(data, IMPROVED_QUICK); \vVGfG?6
} zmH8#
private static String[] name={ kK]JN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /xmUu0H$R
}; >1[Hk0 <x
Omkl|l9
private static Sort[] impl=new Sort[]{ X8uVet]D~
new InsertSort(), 6$qn'K$
new BubbleSort(), E\2|
new SelectionSort(), )J&1uMp{
new ShellSort(), FI1R7A
new QuickSort(), q(0V#kKC
new ImprovedQuickSort(), hX\z93an
new MergeSort(), eqK6`gHa6
new ImprovedMergeSort(), B[:-SWd
new HeapSort() KUG\C\z6=
}; l`x;Og>a
nmlQ-V-
public static String toString(int algorithm){ : [o0Va2 d
return name[algorithm-1]; k23*F0Dv
} Vk/CV2
mAkR<\?iTF
public static void sort(int[] data, int algorithm) { +@),Fk_
impl[algorithm-1].sort(data); [ay~l%x
} }Wf\\
0;,4.hsh
public static interface Sort { <^?64
public void sort(int[] data); rWKc,A[
} Zi47)8
PYDf|S7
public static void swap(int[] data, int i, int j) { 'ojI_%9<
int temp = data; KD9Y
data = data[j]; ~C6Qp`VF
data[j] = temp; ]K'iCYY
} KN>U6=WN
} ZSj^\JU