[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; G% |$3
} eDh]uKg
int i1=l; IMKyFp]h-
int i2=mid+1; xpJ6M<O{8
for(int cur=l;cur<=r;cur++){ ZPktZ
if(i1==mid+1) 6`>WO_<z
data[cur]=temp[i2++]; o7/S'Haxc]
else if(i2>r) E<j}"W$a
data[cur]=temp[i1++]; p(jY2&g
else if(temp[i1] data[cur]=temp[i1++]; pSjJ u D
else 0]3 ,0s $}
data[cur]=temp[i2++]; hV(>}hb
} |Va*=@&6J
} U7)#9qS4
gn2*'_V~3
} $2p=vi3
otA59 ;Z
改进后的归并排序: -YXNB[C
}e7os0;s
package org.rut.util.algorithm.support; o$*aAgS+
gx-ib/_f1
import org.rut.util.algorithm.SortUtil; emhI1 *}
'pCZx9*c
/** k$u\\`i]oC
* @author treeroot {:D8@jb[
* @since 2006-2-2 |[)k5nUQ|
* @version 1.0 7#~v<M6
*/ 4pvT?s>68
public class ImprovedMergeSort implements SortUtil.Sort { w\"~*(M
-C]k YQ
private static final int THRESHOLD = 10; #41xzN
^#|Sl D]
/* @/MI Oxg[
* (non-Javadoc) /6=IL
* UZ5O%SF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) skd3E4
*/ Q[j'FtP%
public void sort(int[] data) { e-!6m#0
int[] temp=new int[data.length]; iKJ-$x_5
mergeSort(data,temp,0,data.length-1); kLsp0%2
} 1V\tKDM
~4 ~c+^PF
private void mergeSort(int[] data, int[] temp, int l, int r) { TY."?` [FK
int i, j, k; 6:fHPlqW
int mid = (l + r) / 2; z\d{A7
if (l == r) 8#m,TOp
return; InO;DA\
if ((mid - l) >= THRESHOLD) !"v[\||1
mergeSort(data, temp, l, mid); <r9L-4
else '|I8byiK
insertSort(data, l, mid - l + 1); xRX2u_f$<
if ((r - mid) > THRESHOLD) Qm-I=Rh+
mergeSort(data, temp, mid + 1, r); jW,b"[
else lOp7rW]$
insertSort(data, mid + 1, r - mid); Oe)d|6=
&kR*J<)V
for (i = l; i <= mid; i++) { KKBrw+)AJ
temp = data; B(pxyv)
} f`$F^=
for (j = 1; j <= r - mid; j++) { ,4Q1[K35B
temp[r - j + 1] = data[j + mid]; 3WVH8Sb
} Fy; sVB
int a = temp[l]; ,Y:ET1:
int b = temp[r]; fY4I(~Q
for (i = l, j = r, k = l; k <= r; k++) { ~ u)}/
if (a < b) { - w{`/
data[k] = temp[i++]; y*G3dWb
a = temp; UmR\2 cs
} else { `rLcJcW
data[k] = temp[j--]; ?*zDsQ
b = temp[j]; *:5S*E&}V
} K2XRKoG
} :17Pc\:DS
} ~WjK'N4n5
X[ 6#J
/** OH\(;RN*
* @param data U<YcUmX
* @param l tx*L8'jlN
* @param i mn].8F
*/ -wsoJh
private void insertSort(int[] data, int start, int len) { 7C&J88|\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o7r7HmA@
} %`_Rl>@K=
} pjN4)y>0
} }T5 E^
} 5%_aN_1?ef
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堆排序： h-f`as"d
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package org.rut.util.algorithm.support; EED0U?
:>|dE%/e$
import org.rut.util.algorithm.SortUtil; y+aKk6(_W
[n2+`A
/** ~Ydm"G
* @author treeroot f:K>o.
* @since 2006-2-2 mo?*nO|-
* @version 1.0 Ki\\yK
*/ j|KjQ'9
public class HeapSort implements SortUtil.Sort{ Ob&m&2s,
KB"N',kG
/* (non-Javadoc) 9Q.@RO$%C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;*G';VuT
*/ ;/h&40&
public void sort(int[] data) { 8345 H
MaxHeap h=new MaxHeap(); T4nWK!}z
h.init(data); 9+iz+
for(int i=0;i h.remove(); Nz77" kC
System.arraycopy(h.queue,1,data,0,data.length); )H>?K0I
} SDc8\ms
[[#R ry
private static class MaxHeap{ `-!kqJ
6U0BP
void init(int[] data){ AxfQ{>)0
this.queue=new int[data.length+1]; iYf)FPET
for(int i=0;i queue[++size]=data; p9E/#U8A_
fixUp(size); B k*Rz4Oa
} X<D fzd oI
} jL7r1pu5
[}=a6Q>)
private int size=0; (!PsK:wc
~dC.,"
private int[] queue; ' GUCXx
I.'/!11>
public int get() { zsLMROo3
return queue[1]; m^~5Xr"
} gZ|!'
#~m8zG
public void remove() { e"%uOuIYX
SortUtil.swap(queue,1,size--); w!pj);jy{
fixDown(1); o`Af6C;Q
} }U(bMo@;
file://fixdown }[=)sb_
private void fixDown(int k) { 01&@8z'E
int j; ZWni5uF-c
while ((j = k << 1) <= size) { 2+/r~LwbK
if (j < size %26amp;%26amp; queue[j] j++; DK?Z
if (queue[k]>queue[j]) file://不用交换 Vh1y]#w
break; <5"&]! .
SortUtil.swap(queue,j,k); 5NC77}^.
k = j; gj iFpW4
} 1V9AnzwX
} s)fahc(@E
private void fixUp(int k) { ;5.<M<PH
while (k > 1) { ~]#-S20
int j = k >> 1; 9Zj3"v+b
if (queue[j]>queue[k]) ,(-V<>/*.|
break; vQp'bRR
SortUtil.swap(queue,j,k); G'u[0>
k = j; nW*cqM%+
} Q"D5D rj
} mQ<4(qd)
ul~6zBKO
} `d^Q!QxE
{]cr.y]\
} D/Ok
pdR\Ne0P*
SortUtil： hJ]Oa7r
7y3WV95Z\
package org.rut.util.algorithm; Qu,R6G
7G^Q2w
import org.rut.util.algorithm.support.BubbleSort; ,}]v7DD
import org.rut.util.algorithm.support.HeapSort; b9#(I~}
import org.rut.util.algorithm.support.ImprovedMergeSort; [OTn>/W'
import org.rut.util.algorithm.support.ImprovedQuickSort; I|c!:4
import org.rut.util.algorithm.support.InsertSort; .)$MZyo
import org.rut.util.algorithm.support.MergeSort; :hs~;vn)
import org.rut.util.algorithm.support.QuickSort; Bm,Vu 1]t
import org.rut.util.algorithm.support.SelectionSort; B @QWr;
import org.rut.util.algorithm.support.ShellSort; K:jn^JN$
Y2XxfZj
/** eUZk|be
* @author treeroot bEj}J_#
* @since 2006-2-2 PuREqa\_[
* @version 1.0 7I'C'.6iM
*/ KpYezdPF)
public class SortUtil { I/O/*^T
public final static int INSERT = 1; ZIa,pON
public final static int BUBBLE = 2; I=#`8deH(
public final static int SELECTION = 3; "FA.T7G
public final static int SHELL = 4; ~WTkX(\
public final static int QUICK = 5; ssx#|InY
public final static int IMPROVED_QUICK = 6; !CX WoM
public final static int MERGE = 7; (m,H 5
public final static int IMPROVED_MERGE = 8; O+|C<;K
public final static int HEAP = 9; 0&|0l>wy.
dt:$:,"
public static void sort(int[] data) { cjPXrDl{\
sort(data, IMPROVED_QUICK); #f) TAA
} H}5WglV.
private static String[] name={ <^Vj1s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {CI4AT!?W
}; X>=`l)ZR
-grf7w^
private static Sort[] impl=new Sort[]{ \H:T)EVy
new InsertSort(), lP`BKc,
new BubbleSort(), N4C7I1ihq
new SelectionSort(), EZ .3Z`
new ShellSort(), &H;,,7u
new QuickSort(), }|=/v(D
new ImprovedQuickSort(), N$]er'`
new MergeSort(), B F<u3p??
new ImprovedMergeSort(), k*fU:q1
new HeapSort() Ql)hIf$Oo
}; i m;6$3
!Yb !Au[
public static String toString(int algorithm){ 8i`>],,ch
return name[algorithm-1]; ( ~5M{Xh
} r)'vn[A
|} b+$J
public static void sort(int[] data, int algorithm) { \6&Ml]1
impl[algorithm-1].sort(data); `9K5 ;]
} h9ScN(|0y
e9h@G#
public static interface Sort { s/IsrcfM
public void sort(int[] data); $!.>)n
} H/*ol^X7
Tl2t\z+ps
public static void swap(int[] data, int i, int j) { )/::i O&$:
int temp = data; j %gd:-tA
data = data[j]; +,>%Yb=EA
data[j] = temp; "g^i%
} zk8)!Af
} {s0%XG1$