[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; )z2|"Lp
} 5y1or
int i1=l; .-SDo"K.h
int i2=mid+1; g ,/a6M
for(int cur=l;cur<=r;cur++){ D~G5]M,}$
if(i1==mid+1) ]}mly`Fw
data[cur]=temp[i2++]; 'O.+6`&
else if(i2>r) :r1;}hIA9
data[cur]=temp[i1++]; u-AWJc+F.
else if(temp[i1] data[cur]=temp[i1++]; V,>+G6e
else *'UhlFed
data[cur]=temp[i2++]; 0K=Qf69Y
} CCbkxHMf|!
} .dD9&n;#^
0Y2\n-`z
} g\ErJ+i
XIr{U5$<6
改进后的归并排序: 2Pbe~[
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package org.rut.util.algorithm.support; vOos*&
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import org.rut.util.algorithm.SortUtil; AddGB^7yl
:y=!{J<
/** k_,MoDz
* @author treeroot 5h_<R!jA
* @since 2006-2-2 !UBy%DN~k
* @version 1.0 [8,PO
*/ O0@w(L-
public class ImprovedMergeSort implements SortUtil.Sort { 6eOrs-ty
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private static final int THRESHOLD = 10; NJn&>/vM
aQ(`6DQv
/* Z} c'Bm(
* (non-Javadoc) iLF^%!:X%
* uY.=4l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kP)YgkE
*/ VLf g[*k
public void sort(int[] data) { `@h:_d
int[] temp=new int[data.length]; m_cO<LB
mergeSort(data,temp,0,data.length-1); DZ^=*.
} X Y~;)<s_
HH"$#T^-
private void mergeSort(int[] data, int[] temp, int l, int r) { , p_G/OU
int i, j, k; Wm<z?.lS
int mid = (l + r) / 2; ;KZrl`
if (l == r) .4wTjbO6
return; fJX\'Rc\
if ((mid - l) >= THRESHOLD) +IG1IF
mergeSort(data, temp, l, mid); }KK2WJp#M
else }0$mn)*k
insertSort(data, l, mid - l + 1); vT?Q^PTO
if ((r - mid) > THRESHOLD) . 3GnZR,L
mergeSort(data, temp, mid + 1, r); Q(lku"U'
else BR;QY1
insertSort(data, mid + 1, r - mid); RXBb:f
pJd0k"{
for (i = l; i <= mid; i++) { \;-qdV_JB
temp = data; ;SfNKu
} U);OR
for (j = 1; j <= r - mid; j++) { 4py(R-8\
temp[r - j + 1] = data[j + mid]; 1 ojhh7<
} 9u?(^(.
int a = temp[l]; L59bu/LfL
int b = temp[r]; HeCcF+
for (i = l, j = r, k = l; k <= r; k++) { XdcG0D^
if (a < b) { 9ftN8Svw
data[k] = temp[i++]; ]$3+[9x'
a = temp; mV<i JZh
} else { CoJ55TAW
data[k] = temp[j--]; ^"1TPd|
b = temp[j]; cFLd)mt/
} (B&h;U$HAH
} $'^&\U~?
} YZibi
X6xx2v%D
/** [Gh"ojt]w
* @param data opdu=i=E
* @param l !6Q`>s]
* @param i \EZ+#3u
*/ k_!+V`Ro#
private void insertSort(int[] data, int start, int len) { ~wTX>qV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X:Q$gO?[4
} gA_krK,Z
} vVAb'`ysv
} 7$ d}!S
} qbXz7s*{
fE^uF[-7?
堆排序： job[bhK'Jt
sAVefL?
package org.rut.util.algorithm.support; @&5A&(
4b4QbJ$
import org.rut.util.algorithm.SortUtil; aM$\#Cx
eaQ90B4
/** nX._EC
* @author treeroot 6yI}1g
* @since 2006-2-2 k,rWa
* @version 1.0 FSU<Y1|XM
*/ H>.B99vp
public class HeapSort implements SortUtil.Sort{ >dk9f}7-
('t kZt%8
/* (non-Javadoc) >!}`%pk(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QsOhz
*/ =Ey`M#t;
public void sort(int[] data) { n>P!u71
MaxHeap h=new MaxHeap(); Noh?^@T`Ov
h.init(data); IZ8y}2
for(int i=0;i h.remove(); _R7 w?!t8
System.arraycopy(h.queue,1,data,0,data.length); t}Ss=0dJO
} :mpiAs<%U"
=OYQM<q
private static class MaxHeap{ W/r^ugDV
I]X
void init(int[] data){ cOkgoL" 4
this.queue=new int[data.length+1]; H?uukmZl
for(int i=0;i queue[++size]=data; !%xP}{(7
fixUp(size); '"'Btxz
} H] k'?;
} jJ~Y]dQi
zE`R,:VI
private int size=0; 0+EN@Y^dAV
/)9W1U^B
private int[] queue; ,)h)5o(?
B!bsTvX
public int get() { B wC+ov=
return queue[1]; ''S&e
} . uR M{Bs
m=TJDr-
public void remove() { g_w&"=.jBq
SortUtil.swap(queue,1,size--); aI(>]sWJ
fixDown(1); ,+._;[k
} z856 nl
file://fixdown >|3a 9S
private void fixDown(int k) { 0@)%h&mD
int j; frN3S
while ((j = k << 1) <= size) { Km3&N
if (j < size %26amp;%26amp; queue[j] j++; NP/>H9Q2%
if (queue[k]>queue[j]) file://不用交换 @T&t.|`
break; -[R!O'N9
SortUtil.swap(queue,j,k); F Z!J
k = j; Y-p<qL|_
} \k@Z7+&7
} dB;3.<S=
private void fixUp(int k) { "&lN\&:
while (k > 1) { Z0ReWrl;`
int j = k >> 1; ~ y;y(4<
if (queue[j]>queue[k]) jxw_*^w"
break; R8&|+ya
SortUtil.swap(queue,j,k); <y)E>Fl
k = j; nrpI5t.b
} M3pjXc<O
} f vLC_'M
+a|/l
} }Qrab#v
WM,i:P)b
} 4/*H.Fl
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SortUtil： ],lV}Mlg*
|d7$*7TvV
package org.rut.util.algorithm; }+RB=#~o
6)e5zKW!?
import org.rut.util.algorithm.support.BubbleSort; ?znSx}t
import org.rut.util.algorithm.support.HeapSort; C+%K6/J(
import org.rut.util.algorithm.support.ImprovedMergeSort; lIf(6nm@
import org.rut.util.algorithm.support.ImprovedQuickSort; ^0tw%6:
import org.rut.util.algorithm.support.InsertSort; @Bs0Avj.
import org.rut.util.algorithm.support.MergeSort; 4h|dHXYZ
import org.rut.util.algorithm.support.QuickSort; otr>3a*'
import org.rut.util.algorithm.support.SelectionSort; B@t'U=@7
import org.rut.util.algorithm.support.ShellSort; "tu*YNP\Q
5Qa zHlJ
/** :0^s0l
* @author treeroot 5j^NV&/_
* @since 2006-2-2 C3VLV&wF
* @version 1.0 w([$@1]
*/ sR=/%pVN
public class SortUtil { 9z ?7{2C
public final static int INSERT = 1; c ~Fdx
public final static int BUBBLE = 2; u&]vd /
public final static int SELECTION = 3; $%2H6Eg0
public final static int SHELL = 4; /_\W+^fE
public final static int QUICK = 5; 4MW ]EQ-
public final static int IMPROVED_QUICK = 6; j@1)K3Hga
public final static int MERGE = 7; fgF;&(b
public final static int IMPROVED_MERGE = 8; Ec]|p6a3
public final static int HEAP = 9; o6}n8U}bk
~}%~oT
public static void sort(int[] data) { x5Zrz<Y$w
sort(data, IMPROVED_QUICK); RuAlB*
} A^Cj1:,
private static String[] name={ ohQAA h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4TRG.$2[
}; !.Zt[g}
@CQb[!9C
private static Sort[] impl=new Sort[]{ rdJB*Rlkh
new InsertSort(), 5bX6#5uP1
new BubbleSort(), ii4B?E
new SelectionSort(), Mkv|TyC
new ShellSort(), M{N(~ql
new QuickSort(), w1|Hy2D`0
new ImprovedQuickSort(), MZv\ C
new MergeSort(), i$UQbd
new ImprovedMergeSort(), HJhH-\{@
new HeapSort() S>_27r{
}; ;-@=
;D2E_!N dt
public static String toString(int algorithm){ |4b)>8TL/
return name[algorithm-1]; Imym+
} R+=a`0_S
#y; yN7W
public static void sort(int[] data, int algorithm) { BWUq%o,@g
impl[algorithm-1].sort(data); G'#41>q+
} g9mG`f
l]#!+@
public static interface Sort { F^kwdS
public void sort(int[] data); 5EeDHsvV9
} [}o~PN:sT(
5lmO:G1
public static void swap(int[] data, int i, int j) { H\G{3.T.9
int temp = data; cT'w=
data = data[j]; GJQc!cqk
data[j] = temp; Yx)o:#2
} I6w~H?ul@*
} B)=~8wsI:Z