[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; QN8.FiiD
} ~+anI
int i1=l; Ixr#zt$T-G
int i2=mid+1; /rzZU}3[
for(int cur=l;cur<=r;cur++){ +<7a$/L?4
if(i1==mid+1) lQt* LWd[
data[cur]=temp[i2++]; (R^Ca7F
else if(i2>r) a3B^RbDP&8
data[cur]=temp[i1++]; m ol|E={si
else if(temp[i1] data[cur]=temp[i1++]; 9D H}6fO
else R zn%!d^$>
data[cur]=temp[i2++]; !^IAn
} x`Ik747^v
} (I ~r~5^
2|}KBny
} 7rjS.
VN >X/
改进后的归并排序: Z:Nm9m
k(R&`
package org.rut.util.algorithm.support; 3sz?49tX
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import org.rut.util.algorithm.SortUtil; 95^-ptO{1`
(a@}J.lL
/** (6~~e$j
* @author treeroot )kt,E}609
* @since 2006-2-2 `dm}|$X|
* @version 1.0 $?dutbE
*/ @WO>F G3
public class ImprovedMergeSort implements SortUtil.Sort { {PQ!o^7y
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private static final int THRESHOLD = 10; Sj9NhtF]f
M|\C@,F]8
/* hgI;^ia
* (non-Javadoc) |C3~Q{A
* _?~)B\@~0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >o8N@`@VK-
*/ FW,@.CX
public void sort(int[] data) { t.6gyrV7><
int[] temp=new int[data.length]; N-<m/RS
mergeSort(data,temp,0,data.length-1); +I_p\/J?w/
} S#f}mb0,
=J827c{.
private void mergeSort(int[] data, int[] temp, int l, int r) { D",~?
int i, j, k; &46Ro|XE`
int mid = (l + r) / 2; ?%wM8?
if (l == r) p<AzpkU,A
return; Vv~:^6il
if ((mid - l) >= THRESHOLD) `ILO]+`5
mergeSort(data, temp, l, mid); :yE7jXB
else }@NT#hD
insertSort(data, l, mid - l + 1); 5d5q0bb
if ((r - mid) > THRESHOLD) 07qL@![!
mergeSort(data, temp, mid + 1, r); ZY{zFg9
else r^$WX@ t&
insertSort(data, mid + 1, r - mid); $ZfoJR]%
RMO6kbfP
for (i = l; i <= mid; i++) { %N0cp@Vz
temp = data; 2` j#eB1
} s5D<c'-
for (j = 1; j <= r - mid; j++) { )ZQML0}P;
temp[r - j + 1] = data[j + mid]; D$/*Z5Z)]
} h;Se.{
int a = temp[l]; AZ& ]@Ao
int b = temp[r]; 5Q.z#]Lg
for (i = l, j = r, k = l; k <= r; k++) { ,`;Dre
if (a < b) { O*y@4AR"S
data[k] = temp[i++]; dRPX`%J
a = temp; &~a/Upz0]_
} else { 6/&aBE=
data[k] = temp[j--]; /6d:l>4
b = temp[j]; 0 |Y'@&
} ;OY*`(Id
} N77EM
} ^.; x
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/** `o,D[Jd
* @param data LSN%k5G7.
* @param l Sn~|<Vf
* @param i PXJ`<XM
*/ +oe%bk|A
private void insertSort(int[] data, int start, int len) { 84UI)nE:Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?~s23%E
} *d;D~"E<@
} }~3 %KHT
} v|K<3@J
} 2[Q/|D}}|
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堆排序： u=9)A9
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package org.rut.util.algorithm.support; +\@WOs
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import org.rut.util.algorithm.SortUtil; O]N 8QH
~Y /55uC
/** 1E|~;wo\
* @author treeroot rP7~R
* @since 2006-2-2 ! fSM6Vo
* @version 1.0 Bq)aA)gF
*/ d:1TSJff%/
public class HeapSort implements SortUtil.Sort{ Nw=mSW^E
2Ed
/* (non-Javadoc) X__>r ?oJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +ZxG<1&
*/ AB1,G|L
public void sort(int[] data) { 1} h''p
MaxHeap h=new MaxHeap(); #}U*gVYe
h.init(data); ^lYa9k
for(int i=0;i h.remove(); 1L:sck5k
System.arraycopy(h.queue,1,data,0,data.length); UM QsYD)
} 56Gc[<nR
j/Rm~!q
private static class MaxHeap{ 0nV|(M0lu?
=f*Wj\
void init(int[] data){ eFiUB
this.queue=new int[data.length+1]; &@anv.D
for(int i=0;i queue[++size]=data; G,6Zy-Y9
fixUp(size); O.g!k"nas&
} 9X6l`bo'
} Jf|6 FQo&
eX9Hwq4X44
private int size=0; eaGd:(
5$C]$o}
private int[] queue; M7 Z9(3Va
07:N)y,
public int get() { aur4Ky> :
return queue[1]; V=LJ_T"z0
} si|DxDx
;`P}\Q{
public void remove() { d:V6.7>,
SortUtil.swap(queue,1,size--); /o)o7$6Q
fixDown(1); fX[6 {
} Z?}yPsOb
file://fixdown "2~%-;c
private void fixDown(int k) { RN"O/b}qQ
int j; %W[#60
while ((j = k << 1) <= size) { O3>m,v
if (j < size %26amp;%26amp; queue[j] j++; WFBVAD
if (queue[k]>queue[j]) file://不用交换 ]@D#<[5\
break; 39+6ZTqx
SortUtil.swap(queue,j,k); ca{u"n
k = j; ^&mJDRe
} %Qc5_of
} #^FDFl
private void fixUp(int k) { ILQB%0!
while (k > 1) { D+"-(k
int j = k >> 1; &+Iv"9
if (queue[j]>queue[k]) 'QrvkQ
break; ZSo#vQ
SortUtil.swap(queue,j,k); %tRQK$]c
k = j; ?\D=DIN-r
} Cm5:_K`;]
} R^*h|7)E
Z1t?+v+Ro*
} dY'mY~Tv
t@(`24
} Mx<?c
KS6H`Mm}/
SortUtil： UFLN/
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package org.rut.util.algorithm; M_Qv{
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import org.rut.util.algorithm.support.BubbleSort; ,GH;jw)P
import org.rut.util.algorithm.support.HeapSort; :GaK.W q
import org.rut.util.algorithm.support.ImprovedMergeSort; iO,_0Y4
import org.rut.util.algorithm.support.ImprovedQuickSort; D@cv{ _M/
import org.rut.util.algorithm.support.InsertSort; X/D^?BKC
import org.rut.util.algorithm.support.MergeSort; t'{\S_
import org.rut.util.algorithm.support.QuickSort; U0Y;*_>4
import org.rut.util.algorithm.support.SelectionSort; fZ*LxL
import org.rut.util.algorithm.support.ShellSort; .<Lbv5m
P e\AH
/** RrPo89o
* @author treeroot +TQMA>@g<
* @since 2006-2-2 !k= ~5)x
* @version 1.0 TL?(0]Hfe
*/ 2unaK<1s
public class SortUtil { MzY~-74aF
public final static int INSERT = 1; dD Zds k+!
public final static int BUBBLE = 2; HaUfTQ8
public final static int SELECTION = 3; ZM~kc|&
public final static int SHELL = 4; PU6Sa-fQ2,
public final static int QUICK = 5; APC,p,"
public final static int IMPROVED_QUICK = 6; l-Q.@hG
public final static int MERGE = 7; EM.7,;|N
public final static int IMPROVED_MERGE = 8; X}/{90UD
public final static int HEAP = 9; Y8Bc &q}
hLZ<h7:
public static void sort(int[] data) { opKk#40
sort(data, IMPROVED_QUICK); (np %urx!
} EAgNu?L
private static String[] name={ .[E"Kb}=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DeAi'"&
}; J9kmIMq-C
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private static Sort[] impl=new Sort[]{ sL9,+
new InsertSort(), 7HpfHqJ7
new BubbleSort(), <#hltPyh
new SelectionSort(), 0x-58i0
new ShellSort(), [CBhipoc
new QuickSort(), @Y~R*^n"}
new ImprovedQuickSort(), nJvDkh#h1
new MergeSort(), !w!}`|q
new ImprovedMergeSort(), vtv^l3
new HeapSort() cNX0.7Ls
}; eu]t.Co[X
z g@,s"`>
public static String toString(int algorithm){ TJB)]d<
return name[algorithm-1]; C{i9~80n
} ),<E-Ub
J< E"ZoY
public static void sort(int[] data, int algorithm) { |b@H]c;"
impl[algorithm-1].sort(data); jWg7RuN
} 6%p$C oR
98%M`WY
public static interface Sort { ",b3C.
public void sort(int[] data); S~8w-lG!
} X_7cwPY
zH1pW(
public static void swap(int[] data, int i, int j) { _e ]jz2j
int temp = data; tA?cHDp4E
data = data[j]; W-QBC- 3
data[j] = temp; {M7`z,,[
} Gj~1eS
} $#cZJ@;]