[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; $.kP7!`:,
} yC !`6$
int i1=l; wXp A1,i
int i2=mid+1; IW3ZHmrpA
for(int cur=l;cur<=r;cur++){ ]&\HAmOQS
if(i1==mid+1) 4k_&Q?1
data[cur]=temp[i2++]; zQ9"i
else if(i2>r) $j:$ `
data[cur]=temp[i1++]; $u_0"sUV
else if(temp[i1] data[cur]=temp[i1++]; !Uz{dFJf;
else 3}=r.\]U
data[cur]=temp[i2++]; :S}!i?n
} ~C=I{qzF+
} TSqfl/UI
.MkHB0 2N
} !TY9\8JzV
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改进后的归并排序: *JE%bQ2Q
zF6R\w
package org.rut.util.algorithm.support; 1o)@{x/pd
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import org.rut.util.algorithm.SortUtil; R;&C6S
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/** A<l8CWv[
* @author treeroot jZeY^T)f"
* @since 2006-2-2 tGnBx)J|
* @version 1.0 #pu6^NTK
*/ !!Z#'Wq
public class ImprovedMergeSort implements SortUtil.Sort { 4s nL((
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private static final int THRESHOLD = 10; tAFKq>\
)&]gX
/* w2!G"oD
* (non-Javadoc) n4Nb,)M
* SLp &_S@4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P'f =r%
*/ m7wD#?lm
public void sort(int[] data) { CY#|VE M
int[] temp=new int[data.length]; /ylO["<Q
mergeSort(data,temp,0,data.length-1); O6Bs!0,
} )o)<5Iqh
Bz<T{f
private void mergeSort(int[] data, int[] temp, int l, int r) { C,7d
int i, j, k; Z"PPXv-<jY
int mid = (l + r) / 2; 0X@!i3eu
if (l == r) b/'{6zn
return; 3~Od2nk(x
if ((mid - l) >= THRESHOLD) q`z/ S>
mergeSort(data, temp, l, mid); V(_OyxeC{2
else `s5<PCq
insertSort(data, l, mid - l + 1); .?R~!K{`
if ((r - mid) > THRESHOLD) iSu7K&X9q
mergeSort(data, temp, mid + 1, r); w>Iw&US
else W1'F)5(?7
insertSort(data, mid + 1, r - mid); i^Vb42%y
M#X8Rs1`
for (i = l; i <= mid; i++) { a0I+|fR
temp = data; zWKnkIit,
} k#Qav1_
for (j = 1; j <= r - mid; j++) { bA}9He1
temp[r - j + 1] = data[j + mid]; 4-;"w;
} {Q],rv|;
int a = temp[l]; FY_.Vp
int b = temp[r]; d%_=r." Y
for (i = l, j = r, k = l; k <= r; k++) { 6"fYSn>
if (a < b) { Q^X
data[k] = temp[i++]; F: %-x=q
a = temp; l?pF?({
} else { lM1~K
data[k] = temp[j--]; cb!mV5M-g
b = temp[j]; TI4#A E
} ,5oe8\uz
} "1O!Ck_n
} {$D[l hj
Cbu/7z
/** !>QS746S@
* @param data fB^h2
* @param l xIu#
* @param i >qj.!npQD
*/ M)S(:Il6Xx
private void insertSort(int[] data, int start, int len) { x|4m*>Ke
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F.5'5%
} Z(DCR/U=(>
} d: D`rpcC
} oV"d%ks
} xxjg)rVuy
B1<:nl
堆排序： D.d(D:
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package org.rut.util.algorithm.support; p}q27<O*/
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import org.rut.util.algorithm.SortUtil; !5,>[^y3
|^fubQs;2
/** <xM$^r)
* @author treeroot DfYOGs]@
* @since 2006-2-2 3ARvSz@5
* @version 1.0 Gk_%WY*
*/ Z]?Tx2|7
public class HeapSort implements SortUtil.Sort{ m$<LO%<~p
HYVSi3[
/* (non-Javadoc) MKVz'-`u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tGt/=~n9
*/ iMG)zPj
public void sort(int[] data) { %smQ`u|
MaxHeap h=new MaxHeap(); ^(z7?T
h.init(data); \H(r }D$u<
for(int i=0;i h.remove(); _vOV(#q2a
System.arraycopy(h.queue,1,data,0,data.length); ,n\"zYf]^
} _Z~cJIEU
=KQQS6
private static class MaxHeap{ 1 &G0;
|OW/-&)
void init(int[] data){ }/tT=G]91
this.queue=new int[data.length+1]; 7$3R}=Z`\q
for(int i=0;i queue[++size]=data; S1jI8 #z}_
fixUp(size); m(0sG(A~
} 4I7B #{
} x_za R}WI
6,C2PR_+
private int size=0; 0IZaf%zYc
A:|dY^,:?*
private int[] queue; c:#<g/-{wM
b#ga
public int get() { bVfFhfh*
return queue[1]; e^v5ai
} UN ;9h9
&O|!w&
public void remove() { -CV_yySc
SortUtil.swap(queue,1,size--); U-RR>j
fixDown(1); R&oC9<
} +'fy%/
file://fixdown wVegr
private void fixDown(int k) { 0|6]ps4Z7
int j; ~K'e}<-G
while ((j = k << 1) <= size) { ?:StFlie
if (j < size %26amp;%26amp; queue[j] j++; +_^Rxx!XA
if (queue[k]>queue[j]) file://不用交换 ggluQGA
break; 2_S%vA<L
SortUtil.swap(queue,j,k); >?Y)evW
k = j; 05sWN0
} Z_b^K^4
} 1XfH,6\8i
private void fixUp(int k) { {u!Q=D$3
while (k > 1) { #h,7dz.d
int j = k >> 1; *"cK_MH/o
if (queue[j]>queue[k]) Q6>7{\8l
break; #Z;6f{yWf
SortUtil.swap(queue,j,k); nsT]Yxo%M
k = j; 6yDj1PI
} ,m4M39MWJ
} JA]TO(x
0!4;."S
} G.j R
S8=Am7D]1
} $ghAC
V[9#+l~#
SortUtil： * SAYli+@
bx!uHL=
package org.rut.util.algorithm; sb1Zm*m6
D.7,xgH
import org.rut.util.algorithm.support.BubbleSort; K)-Gv|*t
import org.rut.util.algorithm.support.HeapSort; OGl>i
import org.rut.util.algorithm.support.ImprovedMergeSort; M't~/&D#
import org.rut.util.algorithm.support.ImprovedQuickSort; |X}H&wBWo
import org.rut.util.algorithm.support.InsertSort; j[E8C$lW
import org.rut.util.algorithm.support.MergeSort; GUX!kj
import org.rut.util.algorithm.support.QuickSort; Gp 8%n
import org.rut.util.algorithm.support.SelectionSort; F4P=Wz]
import org.rut.util.algorithm.support.ShellSort; B#o/3
tKr.{#)
/** ]lBe
* @author treeroot ^Rel-=Z$B
* @since 2006-2-2 yQP!Vt^
* @version 1.0 aJ!(c}N~97
*/ +jpaBr-O#
public class SortUtil { $x5,Oen
public final static int INSERT = 1; b*;zdGX.A9
public final static int BUBBLE = 2; N3M:|D
public final static int SELECTION = 3; -|1H-[Y(
public final static int SHELL = 4; w@K4u{|
public final static int QUICK = 5; W|~Jl7hs8Q
public final static int IMPROVED_QUICK = 6; #=}dv8
public final static int MERGE = 7; =O~ J
public final static int IMPROVED_MERGE = 8; sObH#/l`
public final static int HEAP = 9; 7z.(pg=
O~p@87aq
public static void sort(int[] data) { F'v3caE
sort(data, IMPROVED_QUICK); 3Jt7IM!9[
} B~%'YQk
private static String[] name={ O?p8Gjf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [H~Yg2O
}; oK-T@ &-
MU }<-1
private static Sort[] impl=new Sort[]{ ywSV4ZtM
new InsertSort(), E$u9Jbe
new BubbleSort(), UxGr+q
new SelectionSort(), *8QESF9
new ShellSort(), N}$$<i2o
new QuickSort(), _oV;Y`_
new ImprovedQuickSort(), z XI [f
new MergeSort(), >"OwdAvX
new ImprovedMergeSort(), i146@<\G{P
new HeapSort() L9lNAiOH
}; |*G$ilu
dz3KBiq
public static String toString(int algorithm){ xH,D bAC;
return name[algorithm-1]; 2&e2/KEWR
} TO(2n8'fdO
MC 8t"SB
public static void sort(int[] data, int algorithm) { 5} v(Ks>
impl[algorithm-1].sort(data); p"xti+2,
} o{W4@:Ib
R*"31&3le4
public static interface Sort { >AtW
public void sort(int[] data); b`W2^/D
} @&I7z,
0Q>yv;M
public static void swap(int[] data, int i, int j) { eT(/D/jan
int temp = data; r Jo8|
data = data[j]; V`ODX>\
data[j] = temp; cWNZ +Q8Y
} /w!!jj^
} 8fG$><@