[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; Y[Us"K`
} Wfkm'BnV
int i1=l; 2S}%r4$n}
int i2=mid+1; mIq6\c$
for(int cur=l;cur<=r;cur++){ ZN5\lon|Y
if(i1==mid+1) laqKP+G
data[cur]=temp[i2++]; |{cdXbr
else if(i2>r) /ow/)\/}
data[cur]=temp[i1++]; |//cA2@.
else if(temp[i1] data[cur]=temp[i1++]; K)$.0S9d
else T=:&W3
data[cur]=temp[i2++]; g"]%5Ow1
} YnuC<y &p
} Q?n} ~(%&
-cNh5~p=
} b")&"o)G2W
vp &jSfQ^
改进后的归并排序: |332G64K
]"q[hF*PM
package org.rut.util.algorithm.support; t`+x5*gW
~}w(YQy=y
import org.rut.util.algorithm.SortUtil; &$jg *Kr
hf0G-r_ow
/** N:[m,U9a
* @author treeroot 3Gf^IV-
* @since 2006-2-2 A_T-]YQ
* @version 1.0 zMt"ST.
*/ fm87?RgXD
public class ImprovedMergeSort implements SortUtil.Sort { DzO0V"+H}k
bmhvC9
private static final int THRESHOLD = 10; D|9C|q
|gx{un`
/* l/[@1(F
* (non-Javadoc) ui`xgR\6Rh
* =1)yI>2e%}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qfvd(w
*/ 8qp!S1Qnv
public void sort(int[] data) { 1F-o3\
int[] temp=new int[data.length]; k=H{gt
mergeSort(data,temp,0,data.length-1); 6 +^V
} *RUB`tEL
##BMh!
private void mergeSort(int[] data, int[] temp, int l, int r) { 1gts=g.
int i, j, k; qqQnL[`)C
int mid = (l + r) / 2; FyJI@PZdI-
if (l == r) Mkko1T=6
return; @)m[:n
if ((mid - l) >= THRESHOLD) UP 1Y3
mergeSort(data, temp, l, mid); W"AWhi{h
else 2:MB u5**
insertSort(data, l, mid - l + 1); +|r;t
if ((r - mid) > THRESHOLD) lYv :
mergeSort(data, temp, mid + 1, r); m7z/@b[
else IK(G%dDw
insertSort(data, mid + 1, r - mid); R}Uvi9?
:aLShxKA
for (i = l; i <= mid; i++) { gWqmK/.U.0
temp = data; )Ac8'{Tq/
} j#Ly!%dp
for (j = 1; j <= r - mid; j++) { 5|x&Z/hL
temp[r - j + 1] = data[j + mid]; ^v*ajy.>
} 6Bmv1n[X^h
int a = temp[l]; }lML..((1
int b = temp[r]; 7'7bIaJk
for (i = l, j = r, k = l; k <= r; k++) { 3l->$R]
if (a < b) { kI]i,v#F
data[k] = temp[i++]; 5&v'aiWK
a = temp; tz j]c
} else { 8|{:N>7
data[k] = temp[j--]; X}0NeG^'O
b = temp[j]; X|L.fB=
} `hM`bcS
} ~^$ONmI5
} H.XD8qi3W
6#7f^uIK
/** 1Ls@|
* @param data ly%$>BRU
* @param l g10$pf+L
* @param i B{H;3{0
*/ JVwYV5-O<0
private void insertSort(int[] data, int start, int len) { E0\ '
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qc|;qPj
} `5<
} UY*Hc
} 2$yKa5SaX
} Hlp!6\gukp
>*,Zc
堆排序： ;H_yNrwA
:m_0WT
package org.rut.util.algorithm.support; 6S])IA&VJ
Xp1xhb*^
import org.rut.util.algorithm.SortUtil; Zg5@l3w
)M#~/~^f+
/** <d#9d.<
* @author treeroot (3 8.s:-
* @since 2006-2-2 ?(*KQ#d
* @version 1.0 8xDSeXh;
*/ jkQv cU
public class HeapSort implements SortUtil.Sort{ 5b0Ipg
Ko\m8\3?fK
/* (non-Javadoc) ;T/W7=4CZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .=3Sm%
*/ K7M7T5<
public void sort(int[] data) { ScQJsFE6
MaxHeap h=new MaxHeap(); g % q7
h.init(data); ppN96-]^0
for(int i=0;i h.remove(); |q^e&M<
System.arraycopy(h.queue,1,data,0,data.length); rVzjLkN^
} P-K\)65{Y
#~I%qa"_pa
private static class MaxHeap{ uKo)iB6D
_jy*`$"q(
void init(int[] data){ ,@R~y
this.queue=new int[data.length+1]; m0paGG
for(int i=0;i queue[++size]=data; SLSJn))@!
fixUp(size); Yt++?
} 93kSBF#
} h#^IT
#AyM!
private int size=0; @bmu4!"d
{[hV['Awv
private int[] queue; !vr">@}K
/(BQzCP9O;
public int get() { kMo;<Z
return queue[1]; U;i:k%Bzy
} pTOS}A[dh
P%xk
public void remove() { @Q!f^
SortUtil.swap(queue,1,size--); {O5;V/00}
fixDown(1); f6PXcV
} *hF5cM[
file://fixdown McNj TD
private void fixDown(int k) { vs{i2!^
int j; RxAWX?9Z
while ((j = k << 1) <= size) { &e7yX
if (j < size %26amp;%26amp; queue[j] j++; D4}WJMQ7s
if (queue[k]>queue[j]) file://不用交换 %3KWc-
break; |08tQ
SortUtil.swap(queue,j,k); 'dQ2"x?4
k = j; |bi"J;y
} AVOqW0Z+y
} 8 fVI33
private void fixUp(int k) { @+syD
while (k > 1) { j()_ VoB1
int j = k >> 1; M< *5Y43
if (queue[j]>queue[k]) YMIDV-
break; _;yp^^S
SortUtil.swap(queue,j,k); ~uqJ@#o{
k = j; 7{D+\i
} o83HR[
} i'L7t!f}o
-qs.'o ;2
} 5L42'gJ
W;,UhE
} wDem }uO
2xni! *T+
SortUtil： IA&((\YC
Xleoh2&M
package org.rut.util.algorithm; :)q/8 0@
r*>XkM& M
import org.rut.util.algorithm.support.BubbleSort; y{? 6U>_
import org.rut.util.algorithm.support.HeapSort; RB\>$D
import org.rut.util.algorithm.support.ImprovedMergeSort; bG^E]a/D
import org.rut.util.algorithm.support.ImprovedQuickSort; CmJI"
import org.rut.util.algorithm.support.InsertSort; G-Sw`HHo
import org.rut.util.algorithm.support.MergeSort; xaoaZ3Ko
import org.rut.util.algorithm.support.QuickSort; A>%fE 6FY
import org.rut.util.algorithm.support.SelectionSort; H[*.Jd
import org.rut.util.algorithm.support.ShellSort; .m7iXd{
)cUc}Avg}
/** bNFX+GA/
* @author treeroot &Km?(%?
* @since 2006-2-2 59$mfW o>
* @version 1.0 7_E+y$i=
*/ 6^mO<nB
public class SortUtil { HMgZ&v
public final static int INSERT = 1; WWrDr
public final static int BUBBLE = 2; !!o69
public final static int SELECTION = 3; 5A7!Xd
public final static int SHELL = 4; |42E'zH&
public final static int QUICK = 5; _:c8YJEG{
public final static int IMPROVED_QUICK = 6; <hZA$.W3
public final static int MERGE = 7; 6@wnF>'/\
public final static int IMPROVED_MERGE = 8; 6.EfM^[
public final static int HEAP = 9; |B)e!#
nDiD7:e7=
public static void sort(int[] data) { Y_p
sort(data, IMPROVED_QUICK); kzLj1Ix2
} bNevHKS
private static String[] name={ ^KF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $*xnq%A
}; Z#w1,n88
Fu )V2[TY
private static Sort[] impl=new Sort[]{ |; $fy-
new InsertSort(), ^-4mZXAy1|
new BubbleSort(), AcrbR&cvG
new SelectionSort(), Mq[;:
new ShellSort(), 6[aCjW
new QuickSort(), Ny*M{}E
new ImprovedQuickSort(), (FH4\'t)
new MergeSort(), 3yr{B Xn
new ImprovedMergeSort(), uEVRk9nb
new HeapSort() ^-~.L: }q
}; ? 4qN>uW=
Rk"VFe>r
public static String toString(int algorithm){ 1^}()H62}
return name[algorithm-1]; }C2I9Cl
} K\IS"b3X
KP_=#KD
public static void sort(int[] data, int algorithm) { H#m)`=nZSZ
impl[algorithm-1].sort(data); x2Y1B
} H<}<f:
0>H<6Ja
public static interface Sort { ItYG9a
public void sort(int[] data); miZ{V%
} A. U<
@`wBe#+\
public static void swap(int[] data, int i, int j) { q jDWA'
int temp = data; (66X
data = data[j]; KbMgatI/
data[j] = temp; X[j4V<4O
} gBYL.^H^l
} Hi,_qlc+