[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; iEiu%T>
} W<\kf4Y
int i1=l; r+t ,J|V
int i2=mid+1; c=b+g+*xd
for(int cur=l;cur<=r;cur++){ `Mg8]H~
if(i1==mid+1) ZhhI@_sz
data[cur]=temp[i2++]; zW%>"y
else if(i2>r) 5~@?>)TBv
data[cur]=temp[i1++]; %/UV_@x&
else if(temp[i1] data[cur]=temp[i1++]; EX[B/YH
else Dh hG$
data[cur]=temp[i2++]; '8s>rH5[V
} 0zg2g!lh
} XMt u"K
bH'S.RWp=
} u|(Ux~O
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改进后的归并排序: w+t#Yb\7
c:=7lI
package org.rut.util.algorithm.support; `%$8cZ-kr
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import org.rut.util.algorithm.SortUtil; GxYW4b
\:]DFZ=!
/** <_"B}c/2$
* @author treeroot Gx.P]O3
* @since 2006-2-2 }czsa_
* @version 1.0 L/Hv4={
*/ _,DO~L
public class ImprovedMergeSort implements SortUtil.Sort { 4cott^K.
S4L-/<s[*
private static final int THRESHOLD = 10; DW1@<X
Kb^>X{
/* ki\B!<uv
* (non-Javadoc) TG1P=g5h
* ec`bz "1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,%A)"doaG
*/ bRWIDPh
public void sort(int[] data) { t(}/g
int[] temp=new int[data.length]; A[RHw<
mergeSort(data,temp,0,data.length-1); GHv{
} Vd,' s
#X#8ynt
private void mergeSort(int[] data, int[] temp, int l, int r) { W0Ktw6
int i, j, k; 9Hu d|n
int mid = (l + r) / 2; ]53O}sH>
if (l == r) tC^ 1}
return; '9'l=Sh
if ((mid - l) >= THRESHOLD) gXLCRn!iR
mergeSort(data, temp, l, mid); @zo7.'7P
else G;/Q>V
insertSort(data, l, mid - l + 1); 34z_+
if ((r - mid) > THRESHOLD) "\7v
mergeSort(data, temp, mid + 1, r); G@9u:\[l
else 5B1G?`]?
insertSort(data, mid + 1, r - mid); NeHx2m+
BYS lKTh
for (i = l; i <= mid; i++) { P^"R4T
temp = data; M~als3
} H#+\nT2m
for (j = 1; j <= r - mid; j++) { jk )Vb
temp[r - j + 1] = data[j + mid]; 3S5^`Ag#
} ZI,j?i6\
int a = temp[l]; y`4{!CEyLW
int b = temp[r]; ;>DHD*3X
for (i = l, j = r, k = l; k <= r; k++) { }<=3W5+
if (a < b) { W]_g4,T>
data[k] = temp[i++]; rOW;yJ[
a = temp; Kv}k*A% S
} else { %MN.O-Lc
data[k] = temp[j--]; W@^J6sH
b = temp[j]; fe|g3>/|
} >:2}V]/;
} $0#6"urG
} P'sfi>A
s D_G)c
/** b4CF`BG
* @param data I FsE!oDs4
* @param l r@k"4ce-
* @param i H8&p<=
*/ A;,Dg=FL/
private void insertSort(int[] data, int start, int len) { L?8^aG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E tx`K5Tr]
} #1[z;Mk0
} *<IR9.~{6%
} Tr%FUi
} &iNS?1a%f=
gXt O*Rfqk
堆排序： h$pk<<
ys%zlbj[
package org.rut.util.algorithm.support; !4t`Hv?'
vG~+r<:
import org.rut.util.algorithm.SortUtil; B!}BM}r
oSY7IIf%L
/** X'x3esw w
* @author treeroot \,R!S/R#
* @since 2006-2-2 MU1E_"Z)
* @version 1.0 1[SA15h
*/ -IU4#s
public class HeapSort implements SortUtil.Sort{ s)ky/ce
)t%h[0{{
/* (non-Javadoc) RDJ+QOVKg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oxfF`L"
*/ <B)
public void sort(int[] data) { /;l[I=VI
MaxHeap h=new MaxHeap(); fagM7)x
h.init(data); #Ao !>qCE
for(int i=0;i h.remove(); 1[-vD=
System.arraycopy(h.queue,1,data,0,data.length); 9Kbw GmSU
} Lc]1$
2JZdw
private static class MaxHeap{ fQU{SjG
tuxRVV8l
void init(int[] data){ v L}T~_=3
this.queue=new int[data.length+1]; tuLH}tkNY
for(int i=0;i queue[++size]=data; u1^\MVO8
fixUp(size); ?YBaO,G9o
} ]g,lRG
} J\=a gQ
Xwq]f:@V
private int size=0; L^FcS\r;
Ie@Jb{x
private int[] queue; !n<o)DsZR
E(4w5=8TI
public int get() { uv]{1S{tb
return queue[1]; s8vKKvs`9
} \|%E%Yc
OCNPi4
public void remove() { BvK QlT
SortUtil.swap(queue,1,size--); I9&lO/c0
fixDown(1); dJi|D
} E^wyD-ii/
file://fixdown 3v1 7"
private void fixDown(int k) { Y:psZ
int j; ((<`zx
while ((j = k << 1) <= size) { ()\jCNLT
if (j < size %26amp;%26amp; queue[j] j++; 9I.^LZ"
if (queue[k]>queue[j]) file://不用交换 yMxTfR
break; B!;+_%P76
SortUtil.swap(queue,j,k); "IFgRaP=
k = j; /t5p-
} ]Blf9h7
} 4h8*mMghs
private void fixUp(int k) { bL`eiol6
while (k > 1) { ? ?[g}>
int j = k >> 1; z%sy$^v@vD
if (queue[j]>queue[k]) I[D8""U
break; M0w/wt|
SortUtil.swap(queue,j,k); {C")#m-0
k = j; rN5tI.iC
} E\M-k\cSj
} BBnq_w"a
7-*=|gl+
} +,5-qm)Gh>
% frfSGf.#
} Sh&PNJ-*
g"K>5Cb
SortUtil： a#[-*ou`
3FNT|QF
package org.rut.util.algorithm; |=K_F3aJ
"2{%JFE
import org.rut.util.algorithm.support.BubbleSort; #;Tz[0
import org.rut.util.algorithm.support.HeapSort; 4W;S=#1
import org.rut.util.algorithm.support.ImprovedMergeSort; (Rd$VYuf
import org.rut.util.algorithm.support.ImprovedQuickSort; `A)"%~
import org.rut.util.algorithm.support.InsertSort; h<x4YB5Mj
import org.rut.util.algorithm.support.MergeSort; wCCV2tk
import org.rut.util.algorithm.support.QuickSort; u0 y 1
import org.rut.util.algorithm.support.SelectionSort; 2@khSWV
import org.rut.util.algorithm.support.ShellSort; 4kl Ao$
i9A~<
/** [4Q"#[V&9
* @author treeroot :O-1rD
* @since 2006-2-2 $yu?.b 9H#
* @version 1.0 ub K7B |p
*/ rv7{Ow_Y
public class SortUtil { z|N3G E(.@
public final static int INSERT = 1; rHz||jjU
public final static int BUBBLE = 2; Q5a)}6-5
public final static int SELECTION = 3; yI3kvh
public final static int SHELL = 4; BRv x[u
public final static int QUICK = 5; d@ Ja}`
public final static int IMPROVED_QUICK = 6; |E3X
public final static int MERGE = 7; ynwG\V
public final static int IMPROVED_MERGE = 8; X}A'Cg0y
public final static int HEAP = 9; ST dNM\+
~Z)/RT/
public static void sort(int[] data) { GTl xq%?b
sort(data, IMPROVED_QUICK); ](jFwxU
} =#xK=pRy;
private static String[] name={ '0Q,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QLKK.]
}; HM9fjl[
ej(ikj~j
private static Sort[] impl=new Sort[]{ <AoXEuD
new InsertSort(), @n+=vC.xO
new BubbleSort(), >m6&bfy\q
new SelectionSort(), y 1\'(1
new ShellSort(), & E}mX]t
new QuickSort(), z=Cr7-
new ImprovedQuickSort(), mUoIJ3fv_,
new MergeSort(), 5:.{oSy7n
new ImprovedMergeSort(), vbG]mMJ
new HeapSort() |j~lkzPnV
}; ~bK9R0|<
p&b5% 4P
public static String toString(int algorithm){ PnYBy| yl
return name[algorithm-1]; H17-/|-;0!
} .qv'6G
+&=?BC}L9^
public static void sort(int[] data, int algorithm) { m#7*:i&@Y
impl[algorithm-1].sort(data); }6u2*(TmD
} 8|^CK|m6*
{*m?Kc7k
public static interface Sort { SPkn3D6
public void sort(int[] data); OFU/gaO~
} {KL5GowH
, X{>
public static void swap(int[] data, int i, int j) { Zu*K-ep"
int temp = data; sW@krBxMv
data = data[j]; 6<76H
data[j] = temp; ~NcQ1.
} @.C{OSHE
} BMyzjteS+