[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; I`O)I&KH
} ~MOab e
int i1=l; Rp!R&U/
int i2=mid+1; e!:/enQo
for(int cur=l;cur<=r;cur++){ [^U#ic>cT
if(i1==mid+1) %kcyE<c
data[cur]=temp[i2++]; D)u 9Y
else if(i2>r) QnWM<6xK"
data[cur]=temp[i1++]; <`~zKFUQ[
else if(temp[i1] data[cur]=temp[i1++]; ]B;\?Tim
else `9+>2*k
data[cur]=temp[i2++]; ;T6x$e
} j#`d%eQ~J
} 8\85Wk{b
e>:bV7h j~
} c2,1d`
^YpA@`n
改进后的归并排序: bg8<}~zg
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package org.rut.util.algorithm.support; )AX0x1I|E
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import org.rut.util.algorithm.SortUtil; ?&H1C4
TvEN0RV2
/** Zv`j+b
* @author treeroot +&w=*IAKZ
* @since 2006-2-2 q $Hg\ {c
* @version 1.0 XuQ7nlbnq
*/ KvFGwq"X
public class ImprovedMergeSort implements SortUtil.Sort { UP@a ?w
sw(dd01a 7
private static final int THRESHOLD = 10; :[#~,TW
}P5zf$
/* _>G=v!
* (non-Javadoc) w_gPX0N}3n
* !_EaF`oh(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mbt}G|;8H7
*/ I1H} 5bf3
public void sort(int[] data) { >UP{=`
int[] temp=new int[data.length]; ed,w-;(n~
mergeSort(data,temp,0,data.length-1); :uAW
} 9Yh0' <Z
C3Hq&TVf/
private void mergeSort(int[] data, int[] temp, int l, int r) { QFI8|i@
int i, j, k; ,C#Mf@b
int mid = (l + r) / 2; ?:Y0#Btj
if (l == r) 3lyk/',
return; N}Ol`@@#h
if ((mid - l) >= THRESHOLD) JY\8^}'9
mergeSort(data, temp, l, mid); P(_wT:8C?
else FN#6pM']|
insertSort(data, l, mid - l + 1); T:$zNX<f
if ((r - mid) > THRESHOLD) nt/+?Sj
mergeSort(data, temp, mid + 1, r); f PoC yl
else 0/8rYBV
insertSort(data, mid + 1, r - mid); I 9yNTD
h\ (z!7t*
for (i = l; i <= mid; i++) { v;E7UL .w
temp = data; )C @W_cfMN
} }),tk?\
for (j = 1; j <= r - mid; j++) { AxaabS$\
temp[r - j + 1] = data[j + mid]; Pez 7HKW:
} Xwg|fr+p
int a = temp[l]; FkdG@7Xf
int b = temp[r]; @quNVx(y
for (i = l, j = r, k = l; k <= r; k++) { KfU4#2}
if (a < b) { (c/H$'
data[k] = temp[i++]; nt,tM/
a = temp; idwiM|.iU
} else { rf+'U9
data[k] = temp[j--]; ~RQ6DG^
b = temp[j]; }w \["r
} sOSol7n
} x?J- {6k
} 't$(Ruw
IT,TSs/Y
/** /t-m/&>
* @param data +$MNG
* @param l H61,pr>
* @param i 8oSndfV
*/ $XFiH~GI
private void insertSort(int[] data, int start, int len) { XE_|H1&j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tHSe>*eC
} {x $H#<Y
} Y[AL!h
} Hno:"k?
} :X>%6Xj?RV
Zho d%n3
堆排序： mPNT*pAO
f>)k<-<yj
package org.rut.util.algorithm.support; r\y~ :
oYNP,8r^
import org.rut.util.algorithm.SortUtil; :t\pi.uWt
`}1IQ.3
/** B2~KkMF
* @author treeroot r5qp[Ss3F
* @since 2006-2-2 NymS8hxR
* @version 1.0 =J0X{Ovn4z
*/ )bZS0f-
public class HeapSort implements SortUtil.Sort{ Y`S9mGR#
+/60$60[z
/* (non-Javadoc) j2T Z`Z?a^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mie<jha
*/ @ 8yV15!
public void sort(int[] data) { Egv (n@1
MaxHeap h=new MaxHeap(); 8LP L4l
h.init(data); _ x&Y'X|
for(int i=0;i h.remove(); 8(UUc>g
System.arraycopy(h.queue,1,data,0,data.length); ylF%6!V}4V
} ':8yp|A|
BN&^$1F((
private static class MaxHeap{ t\nYUL-H
?Kw~O"L8
void init(int[] data){ {n8mE,;M
this.queue=new int[data.length+1]; 3^l@!Qw
for(int i=0;i queue[++size]=data; +K4d(!Sb
fixUp(size); *%L:soM'Ll
} `7qZ6Z3z@
} fYF\5/_
z'K&LH
private int size=0; l~,5)*T
$LLkYOwI
private int[] queue; A-\OB Nh
nwh7DUi
public int get() { F}P+3IaE
return queue[1]; [*U6L<JI
} T]d9tX-
h#9X0u7j
public void remove() { [z$th
SortUtil.swap(queue,1,size--); 4y&%YLMpl
fixDown(1); !T/^zc;G
} {-IH?!&v
file://fixdown S6gg(nNe
private void fixDown(int k) { bX%9'O[-
int j; )J4XM(
while ((j = k << 1) <= size) { \Tf845
if (j < size %26amp;%26amp; queue[j] j++; +^n [B
if (queue[k]>queue[j]) file://不用交换 A+*M<W
break; k3::5&
SortUtil.swap(queue,j,k); ~aKxwH
k = j; x5vvY
} ~G.'pyW
} 5q<AMg
private void fixUp(int k) { e[f}Lxln
while (k > 1) { UU')V
int j = k >> 1; aMQfg51W:
if (queue[j]>queue[k]) t<5$85Y~
break; hnag<=
SortUtil.swap(queue,j,k); LIYj__4=|
k = j; r9<OB`)3+
} rf_(pp)
} fB+4mEG@
$8gj}0}eH
} <&:OSd:%
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} 7 sv 3=/`
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SortUtil： sJ[I<
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package org.rut.util.algorithm; vZ[wr@)
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import org.rut.util.algorithm.support.BubbleSort; aI]EwVz-q
import org.rut.util.algorithm.support.HeapSort; {\3ZmF
import org.rut.util.algorithm.support.ImprovedMergeSort; bK:mt`
import org.rut.util.algorithm.support.ImprovedQuickSort; 7}>7@W8
import org.rut.util.algorithm.support.InsertSort; `R@1Sc<*|
import org.rut.util.algorithm.support.MergeSort; %fB]N
import org.rut.util.algorithm.support.QuickSort; ^$-ID6
import org.rut.util.algorithm.support.SelectionSort; `6a
import org.rut.util.algorithm.support.ShellSort; b_2bg>|;
gE$D#PZa
/** H&`0I$8m
* @author treeroot fz'@ON
* @since 2006-2-2 %O]]La
* @version 1.0 53efF bo
*/ yO\.dp
public class SortUtil { -\C;2&(
public final static int INSERT = 1; r:fMd3;gq
public final static int BUBBLE = 2; BEWDTOY[
public final static int SELECTION = 3; gXZl3
public final static int SHELL = 4; hKo& ZWPq
public final static int QUICK = 5; pRyePxCDj)
public final static int IMPROVED_QUICK = 6; $m{-I=
public final static int MERGE = 7; UXpF$=
public final static int IMPROVED_MERGE = 8; \ vf&Ldk
public final static int HEAP = 9; m,YBk<Bx
_p0@1 s(U
public static void sort(int[] data) { a=n*}.
sort(data, IMPROVED_QUICK); @I_!q*
} %0 cFs'
private static String[] name={ l*eJa38
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3%gn:.9N
}; DJ)Q,l*|N9
MvV\?Lzj
private static Sort[] impl=new Sort[]{ _Q XC5i
new InsertSort(), FI|jsO 3
new BubbleSort(), cQM_kV??!
new SelectionSort(), E6+c{41B
new ShellSort(), wD+4#=/j
new QuickSort(), L\;n[,.
new ImprovedQuickSort(), "m2g"xa\7
new MergeSort(), ?r P'PUB
new ImprovedMergeSort(), _{$eOwB
new HeapSort() r"HQ>Wn
}; ZSWKVTi
'x/pV5[hQ
public static String toString(int algorithm){ KV&4Ep#
return name[algorithm-1]; W}^X;f
} zsM3 [2E*
D@.+B`bA
public static void sort(int[] data, int algorithm) { ;W"=s79
impl[algorithm-1].sort(data); ))M!"*
} 3i\<#{
k5M3g*
public static interface Sort { :c03"jvYE
public void sort(int[] data); (rTn6[*
} lqaOLZH
,u.G6"<
public static void swap(int[] data, int i, int j) { vGX L'k
int temp = data; M/?*?B
data = data[j]; vca]yK<u
data[j] = temp; \\U,|}L .
} faTp|T`nY
} Tj(DdR#w