[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; rX33s
} A mI>m
int i1=l; VW9>xVd4
int i2=mid+1; UZje>.~?
for(int cur=l;cur<=r;cur++){ {}_Nep/;
if(i1==mid+1) {N!E5*$Tr
data[cur]=temp[i2++]; .Iwur;/\
else if(i2>r) 9zZ5Lr^21
data[cur]=temp[i1++]; _ }E-~I>
else if(temp[i1] data[cur]=temp[i1++]; %j'G.*TD
else #2PrGz]
data[cur]=temp[i2++]; rGnI(m.
} [1b6#I"x
} u>}w-
U g}8y8
} !/Iq{2LX
P+dA~2k
改进后的归并排序: Y=vVxVI\
mRhd/|g*
package org.rut.util.algorithm.support; 7fju
<0u\dU
import org.rut.util.algorithm.SortUtil; vi]r
&8<<!#ob
/** 0R HS]cN
* @author treeroot +yf(Rs)!
* @since 2006-2-2 GilQtd3\
* @version 1.0 YV/>8*i
*/ v7i^O`{eD?
public class ImprovedMergeSort implements SortUtil.Sort { DW/1 =3
J~Cc9"(
private static final int THRESHOLD = 10; E/mubA(&
Ap5}5 ewM
/* |[S90Gw]
* (non-Javadoc) ;n`R\NO9
* 3 p/b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "]VDY)
*/ B_{HkQ.PW
public void sort(int[] data) { }p~OCW!
int[] temp=new int[data.length]; 6'xomRpYN
mergeSort(data,temp,0,data.length-1); pheE^jUr
} GE1i+.+-.
GX4QaT%
private void mergeSort(int[] data, int[] temp, int l, int r) { _om0 e=5)
int i, j, k; AV40:y\RW
int mid = (l + r) / 2; oZTgN .q
if (l == r) 4k8*E5cx
return; bIgh@= 2
if ((mid - l) >= THRESHOLD) P$Z}
mergeSort(data, temp, l, mid); z]kwRWe`j
else I2f?xJ2/Z
insertSort(data, l, mid - l + 1); ~xGoJrF\
if ((r - mid) > THRESHOLD) !FTNmyM~F
mergeSort(data, temp, mid + 1, r); 9-0<*)"b>
else ]@v}y&
insertSort(data, mid + 1, r - mid); AXwaVLEBQ
NS`07#z^
for (i = l; i <= mid; i++) { n(g)UNx
temp = data; Btj#EoSI_
} [SVhtrx|%
for (j = 1; j <= r - mid; j++) { )4l>XlQ&
temp[r - j + 1] = data[j + mid]; '|A|vCRCG
} E2@`d6
int a = temp[l]; ^+ZgWS^%
int b = temp[r]; lDN"atSf
for (i = l, j = r, k = l; k <= r; k++) { qnB<k,8T
if (a < b) { N]NF\7(
data[k] = temp[i++]; NXpmT4
a = temp; 2{bhA5L
} else { bS.s?a
data[k] = temp[j--]; 33Jd!orXU
b = temp[j]; [J^
} Cyq?5\a
} &FSmqE;@^
} "~F3*lk#E
pkJ/oT
/** <aJ$lseG
* @param data u*3NS$vH
* @param l lbQQtpEKO
* @param i >M]6uf
*/ :\XI0E
private void insertSort(int[] data, int start, int len) { rQ/,XH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "#yJHsu]
} Ko6^iI1
} EIjI!0j
} MJ`N,E[
} 'OwyyPBF
#B8*gFZB
堆排序： A /(lKq
e,>%Z@92(
package org.rut.util.algorithm.support; v,=v
Lxv6!?v|
import org.rut.util.algorithm.SortUtil; a5@z:i
>nzu],U
/** UiH!Dl}<
* @author treeroot cvnB!$eji
* @since 2006-2-2 %Y]=1BRk}
* @version 1.0 (D<(6?
*/ NQfYxB1Yr:
public class HeapSort implements SortUtil.Sort{ O.,3|
!gF9k8\Yr$
/* (non-Javadoc) ndink$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %f j+70
*/ O}Hf62"
public void sort(int[] data) { G?AG:%H%
MaxHeap h=new MaxHeap(); <A>)[u
h.init(data); 8"%RCE
for(int i=0;i h.remove(); -'`TL$
System.arraycopy(h.queue,1,data,0,data.length); \\,f{?w
} n`ViTwd]MQ
:IMdN}(L
private static class MaxHeap{ <F;v`h|+S
OoBCY-gj*
void init(int[] data){ nOb?-rR
this.queue=new int[data.length+1]; ZE?f!ifp
for(int i=0;i queue[++size]=data; ~gE:-
fixUp(size); -`+<{NHv\
} BecPT
} *>NX%by)
PRkSQ4
private int size=0; b&#DnZcf
MZV_5i@:
private int[] queue; eg/<[ A:
MP^ d}FL
public int get() { AH#4wPxF
return queue[1]; b0v:12q
} ;{#^MD MB
26I
public void remove() { r X'*|]
SortUtil.swap(queue,1,size--); JTU#vq:TY
fixDown(1); vAb^]d
} FOwnxYGVf
file://fixdown YO+{,$
private void fixDown(int k) { c$:1:B9\
int j; 0nJE/JZ
while ((j = k << 1) <= size) { iD`d99f8O
if (j < size %26amp;%26amp; queue[j] j++; z'7[Tie
if (queue[k]>queue[j]) file://不用交换 b|xpNd-
break; 2 PqS%`XiS
SortUtil.swap(queue,j,k); :s={[KBP
k = j; 1PH:\0}
} g7\,{Bw#E
} ?S Z1`.S
private void fixUp(int k) { q%(EYM5Y
while (k > 1) { Pq9|WV#F5/
int j = k >> 1; yWDTjY/
if (queue[j]>queue[k]) jN31hDg<z
break; Z[Qza13lo
SortUtil.swap(queue,j,k); rH8@69,B
k = j; B9R(&<4
} ^qGb%! l
} %" D%:
gF?[rqz{
} N8toxRu
TlZT1H
} JyLa#\ R
O.G'?m<:#
SortUtil： O.`Jl%
#[{3} %b
package org.rut.util.algorithm; N_eX/ux
);V2?G`/
import org.rut.util.algorithm.support.BubbleSort; S! Rc|6y%
import org.rut.util.algorithm.support.HeapSort; uhyj5u)
import org.rut.util.algorithm.support.ImprovedMergeSort; VhL{'w7f
import org.rut.util.algorithm.support.ImprovedQuickSort; =GlVccc
import org.rut.util.algorithm.support.InsertSort; kIHDeo%K}
import org.rut.util.algorithm.support.MergeSort; #Z+i~t{e(
import org.rut.util.algorithm.support.QuickSort; fhPkEvJ
import org.rut.util.algorithm.support.SelectionSort; Sr?#wev]rn
import org.rut.util.algorithm.support.ShellSort; ]\-^>!F#K
Q?b14]6im
/** Fm\"{)V:b
* @author treeroot in+}/mwfC
* @since 2006-2-2 x8Loyt_C
* @version 1.0 {S/yL[S.
*/ 6!x&LoM
public class SortUtil { 7ELMd{CD
public final static int INSERT = 1; C%d_@*82
public final static int BUBBLE = 2; `Z:R Ce^
public final static int SELECTION = 3; N6K*d` o
public final static int SHELL = 4; Hnknly
public final static int QUICK = 5; }%b;vzkG5
public final static int IMPROVED_QUICK = 6; 7SDFz}
public final static int MERGE = 7; &|>S|
public final static int IMPROVED_MERGE = 8; \B F*m"lz
public final static int HEAP = 9; 1"Z@Q`}
j/=iMq
public static void sort(int[] data) { 'c2W}$q
sort(data, IMPROVED_QUICK); XU!2YO)t;!
} -9N@$+T
private static String[] name={ S/|,u`g-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :B3[:MpL}
}; j',W 64
k@zy
private static Sort[] impl=new Sort[]{ v+p{|X-
new InsertSort(), d->|EJP
new BubbleSort(), XO#/Fv!
new SelectionSort(), rX_@Ihv'
new ShellSort(), !!@A8~H
new QuickSort(), valtev0<
new ImprovedQuickSort(), L,y6^J!
new MergeSort(), 8n1'x;
new ImprovedMergeSort(), !cKz7?w
new HeapSort() B9p?8.[
}; rpeJkG@+
7Q\|=$2
public static String toString(int algorithm){ mc=LP>uoS
return name[algorithm-1]; DPi_O{W>
} 5T sUQc
J+rCxn?;g
public static void sort(int[] data, int algorithm) { V5+SWXZ
impl[algorithm-1].sort(data); HhO".GA
} A-:O`RK
5F`;yh+e
public static interface Sort { oFjIA!
public void sort(int[] data); ;&H4u)
} z/i+EE
21k5I #U
public static void swap(int[] data, int i, int j) { r0p w_j
int temp = data; YK|bXSA[
data = data[j]; ),%6V5a+E
data[j] = temp; s4&^D<
} vJAZ%aW
} V_plq6z