[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; H%> E6rVB
} G1z[v3T
int i1=l; $Mm=5K%
int i2=mid+1; l7]:b8
for(int cur=l;cur<=r;cur++){ %>Z^BM<e
if(i1==mid+1) l^w=b~|7=
data[cur]=temp[i2++]; Nl,M9
else if(i2>r) |} ;&xI
data[cur]=temp[i1++]; X:bv ?o>Y
else if(temp[i1] data[cur]=temp[i1++]; ~q4KQ&.!
else %bgjJ`
data[cur]=temp[i2++]; "i_I<?aGB
} ~+}w>jIm{|
} S#6{4x4
Fxdu)F,~u
} z %{Z
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改进后的归并排序: b}< T<
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package org.rut.util.algorithm.support; \7rFfN3
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import org.rut.util.algorithm.SortUtil; zgRZgVj
:kz*.1
/** 'g.9 goQ
* @author treeroot *F0O*n*7W
* @since 2006-2-2 sS(t }$
* @version 1.0 )Kkw$aQI"d
*/ b9Jah
public class ImprovedMergeSort implements SortUtil.Sort { (|+Sbq(o
ZDuP|" ^
private static final int THRESHOLD = 10; (T:OZmEO.
jA_wOR7$
/* !D6
* (non-Javadoc) /RU'~(
* qpzzk9ba[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GSo&$T;B6
*/ 2(M^8Bl
public void sort(int[] data) { S`g:zb_
int[] temp=new int[data.length]; 1.*VliY
mergeSort(data,temp,0,data.length-1); &<hDl<E
} ,(&jG^IpVJ
4j^-n_T
private void mergeSort(int[] data, int[] temp, int l, int r) { 4.il4Qqy}i
int i, j, k; X^;[X~g
int mid = (l + r) / 2; %;ZWYj`]n
if (l == r) yN}upYxp
return; FN jT?*
if ((mid - l) >= THRESHOLD) "!43,!<
mergeSort(data, temp, l, mid); \ldjWc<S
else nF$n[:
insertSort(data, l, mid - l + 1); ,ab_u@
if ((r - mid) > THRESHOLD) W <.h@Rz+
mergeSort(data, temp, mid + 1, r); bW03m_<M<1
else ZS&>%G
insertSort(data, mid + 1, r - mid); ETU.v*HT]
{p3VHd#
for (i = l; i <= mid; i++) { /]7FX"
temp = data; CR8a)X4j#
} Z3jh-{0
for (j = 1; j <= r - mid; j++) { }*eiG
temp[r - j + 1] = data[j + mid]; vxuxfi8x
} ]gHxvT\E
int a = temp[l]; K5l#dl_T
int b = temp[r]; #m>Rt~(,S
for (i = l, j = r, k = l; k <= r; k++) { T}')QC&wQ
if (a < b) { /IQl
data[k] = temp[i++]; bz5",8Mn
a = temp; /tIR}qK
} else { YdsY2
data[k] = temp[j--]; LF o{,%B
b = temp[j]; 'lmZ{a6
} { a2Y7\C/
} 4cZig\mE;
} w1Ar[ P
},1**_#<Br
/** vn oI.;H,
* @param data "p]Fq,
* @param l +!_?f'kv`
* @param i 0u0<)gdX
*/ ifA=qn0=}
private void insertSort(int[] data, int start, int len) { cfZG3"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KKMzhvf]#
} epz'GN]V
} 85;hs
} Q I!c=:u
} nT7{`aaQl
[HEqMBX=;
堆排序： VjZ_L_U}
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package org.rut.util.algorithm.support; |GmV1hN
#bRr|`
import org.rut.util.algorithm.SortUtil; ;VQFz&Q$u
JiFy.Pf
/** W40GW
* @author treeroot 1|K>V;C
* @since 2006-2-2 #$\cRLPg
* @version 1.0 ;=rMIi
*/ [>`[1;aX
public class HeapSort implements SortUtil.Sort{ mX@Un9k
*7`N^e
/* (non-Javadoc) O_}ZSB8"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) - 0t
*/ 'vgO`
public void sort(int[] data) { NF?FEUoxz
MaxHeap h=new MaxHeap(); iQ[0d.(A
h.init(data); 9C$#A+~C
for(int i=0;i h.remove(); `b(y 5Z
System.arraycopy(h.queue,1,data,0,data.length); p) x.Y
} b0\'JZ
B@ab[dm280
private static class MaxHeap{ iEDZ\\,
{?a9>g-BW
void init(int[] data){ d<*4)MRN
this.queue=new int[data.length+1]; qF9rY)ifm
for(int i=0;i queue[++size]=data; 7Pt*V@DHS
fixUp(size); $D,m o2I
} doR'E=Z4h
} +{%@kX<V_
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private int size=0; ^iaeY jI
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private int[] queue; OtopA)
?nm:e.S+?
public int get() { o?G^=0T
return queue[1]; +B*8$^,V)
} >$.u|a
Q@3.0Hf|{
public void remove() { wf7<#jIq
SortUtil.swap(queue,1,size--); `[+9n2j
fixDown(1); 9"yBO`
} =k4yWC5-
file://fixdown /Vpd*obMB
private void fixDown(int k) { cz_4cMgxu
int j; lYd#pNN
while ((j = k << 1) <= size) { kndP?#> p1
if (j < size %26amp;%26amp; queue[j] j++; nG#lrYZw
if (queue[k]>queue[j]) file://不用交换 ?e|'I"
break; l+'1>T.I
SortUtil.swap(queue,j,k); k&nhF9Y4
k = j; _ Ko0
} FNZB M
} _/[n/"gn
private void fixUp(int k) { l<<G".?
while (k > 1) { 1B3,lYBM
int j = k >> 1; mB(*)PwZ
if (queue[j]>queue[k]) B0c}5V
break; '-#6;_ i<
SortUtil.swap(queue,j,k); UQ|zSalv,
k = j; F"a^`E&
} PVO9KWv**
} *$(=I6b
p71%-nV
} RJs_ S
(4V1%0
} {d$S~
X.0/F6U
SortUtil： dE5DH~ldV
;{|a~e?Y
package org.rut.util.algorithm; H+zn:j@~L
\Rn.ug
import org.rut.util.algorithm.support.BubbleSort; AK<ZP?0
import org.rut.util.algorithm.support.HeapSort; x7e
import org.rut.util.algorithm.support.ImprovedMergeSort; D} 0>x~
import org.rut.util.algorithm.support.ImprovedQuickSort; :C42yQAP
import org.rut.util.algorithm.support.InsertSort; &QOob)
import org.rut.util.algorithm.support.MergeSort; <.3@-z>w2,
import org.rut.util.algorithm.support.QuickSort; tC+9W1o
import org.rut.util.algorithm.support.SelectionSort; b*Ipg8n+
import org.rut.util.algorithm.support.ShellSort; .<Z7K @
"xdJ9Z-B
/** ^&uWAQohL
* @author treeroot 3w )S=4lB
* @since 2006-2-2 /2u;w!oi.
* @version 1.0 v\Y;)/!
*/ '$)Wp_
public class SortUtil { mxHNK4/
public final static int INSERT = 1; _}]o~
public final static int BUBBLE = 2; 4\(;}M-R{
public final static int SELECTION = 3; dh/:H/k kR
public final static int SHELL = 4; kyJv,!};
public final static int QUICK = 5; "!)8bTW
public final static int IMPROVED_QUICK = 6; ,|I\{J #C
public final static int MERGE = 7; We#*.nr{3Z
public final static int IMPROVED_MERGE = 8; Oe9{`~
public final static int HEAP = 9; 0jv9N6IM
z>j%-3_1
public static void sort(int[] data) { Y tGH>0}h
sort(data, IMPROVED_QUICK); G%YD2<V
} @6*<Xs =
private static String[] name={ y<F$@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }sy3Mrb
}; LWbWj ^
MC#bo{Bq3-
private static Sort[] impl=new Sort[]{ |iM*}Ix-
new InsertSort(), ?vRz}hiy
new BubbleSort(), Z-4A`@p
new SelectionSort(), j~DoMP5Ls
new ShellSort(), pq5)Ug
new QuickSort(), e;3$7$n Pv
new ImprovedQuickSort(), ECkfFE`
new MergeSort(), |0f\>X I
new ImprovedMergeSort(), qw87B!D
new HeapSort() O8u"Y0$*w
}; 2|}p&~G(
_;01/V"q6
public static String toString(int algorithm){ Q,\lS
return name[algorithm-1]; KvilGh10
} 8gC(N3/E"
MPzqw)_-v
public static void sort(int[] data, int algorithm) { (%0X\zvu/
impl[algorithm-1].sort(data); dc&Qi_W
} BpP\C!:^
!+)$;`
public static interface Sort { `*oLEXYN
public void sort(int[] data); n^Z?u9VR
} g8kw|BgnL
/LSiDys
public static void swap(int[] data, int i, int j) { 66L*6O4
int temp = data; SgXXitg9+
data = data[j]; zm8m J2s
data[j] = temp; FeV=4tsy
} UjKHGsDi4
} D'nV &m