[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; 8fP2qj0
} 9m$"B*&6G
int i1=l; V4V`0I
int i2=mid+1; M11\Di1
for(int cur=l;cur<=r;cur++){ 6)uBUM;i
if(i1==mid+1) 5tbCx!tL
data[cur]=temp[i2++]; +a.2\Qt2A
else if(i2>r) 2{b/*w
data[cur]=temp[i1++]; K-TsSW$}
else if(temp[i1] data[cur]=temp[i1++]; -@(LN%7!C
else %"mI["{
data[cur]=temp[i2++]; ojnO69v
} &@oI/i&0B
} ]j>xQm\
qSr]d`7@
} giNXXjl
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改进后的归并排序: _F6<ba}o3
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package org.rut.util.algorithm.support; lu"0\}7X
I#(lxlp"Ho
import org.rut.util.algorithm.SortUtil; Hvk~BP' m
/ZV2f3;t
/** INbV6jZL
* @author treeroot D}y W:Pi'
* @since 2006-2-2 3xs<w7
* @version 1.0 Lf5zHUH
*/ i;^lh]u
public class ImprovedMergeSort implements SortUtil.Sort { Gb`)d
9 fB|e|
private static final int THRESHOLD = 10; Nq`;\E.M
CjpGo}a/
/* ,:(s=JN+
* (non-Javadoc) ;99oJD,
* ; oa+Z:;f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (7G4v
*/ C`;igg$t_
public void sort(int[] data) { "ZGP,=?y2
int[] temp=new int[data.length]; t~o"x.
mergeSort(data,temp,0,data.length-1); GO"|^W
} 3Y38lP:>h
wx3_?8z/O
private void mergeSort(int[] data, int[] temp, int l, int r) { <)T| HKx
int i, j, k; _ZhQY,
int mid = (l + r) / 2; J "I,]
if (l == r) 8S8qj"s
return; gvT}UNqL
if ((mid - l) >= THRESHOLD) f9u=h}
mergeSort(data, temp, l, mid); *zPqXtw!j
else $}WT"K
insertSort(data, l, mid - l + 1); T)I)r239h
if ((r - mid) > THRESHOLD) gf8o~vKX$G
mergeSort(data, temp, mid + 1, r); %evb.h)
else aNu.4c/5
insertSort(data, mid + 1, r - mid); \09A"fs{
@)h>vg
for (i = l; i <= mid; i++) { 06Wqfzceb
temp = data; $4g{4-)
} o^2MfFS
for (j = 1; j <= r - mid; j++) { ZXb|3|D
temp[r - j + 1] = data[j + mid]; TbD
} =8 @DYz'
int a = temp[l]; .S|7$_9;b
int b = temp[r]; sn:VMHrOT
for (i = l, j = r, k = l; k <= r; k++) { j_g(6uZhz3
if (a < b) { j ^j"w(a
data[k] = temp[i++]; ly` A,dh
a = temp; =Iop
} else { |-V:#1wR.]
data[k] = temp[j--]; &233QRYM
b = temp[j]; M6p\QKi
} 9 o,`peH
} jaEe$2F2
} bI ;I<Qa
MBt\"b#t
/** &'fER-
* @param data pSlc (M>
* @param l L/jaUt[,
* @param i ExtC\(X;
*/ P0}B&B/a:
private void insertSort(int[] data, int start, int len) { Fqw4XR_`~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e7GYz7
} ?:$ q~[LY
} Kb+SssF
} PI*@.kqR-
} MuD ? KK
phH@{mI
堆排序： sA?8i:]O:
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package org.rut.util.algorithm.support; ."ZG0Zg
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import org.rut.util.algorithm.SortUtil; QtnNc!,n
[voZ=+/
/** _33b %
* @author treeroot b_TI_
* @since 2006-2-2 F62 uDyY
* @version 1.0 RWR{jM]V
*/ :-jbIpj'
public class HeapSort implements SortUtil.Sort{ H14Q-2U1xa
$3"hOEN@5`
/* (non-Javadoc) vU%K%-yXG7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H-pf8
*/ TQck$&
public void sort(int[] data) { (NFrZ0
MaxHeap h=new MaxHeap(); %@C8EFl%3
h.init(data); @LOfqQ$FE
for(int i=0;i h.remove(); /lECgu*#69
System.arraycopy(h.queue,1,data,0,data.length); &fB=&jc*j
} ]|!|3lQ
}iKjef#J
private static class MaxHeap{ ~B{08%|oK
7<WUjK|
void init(int[] data){ 2Jt{oh|
this.queue=new int[data.length+1]; ;l!<A
for(int i=0;i queue[++size]=data; 3H!]X M
fixUp(size); i_N8)Z;r
} CsZm8oL$
} Mbxl{M >
d;dT4vx$[M
private int size=0; eQuw uT
S'HA]
private int[] queue; 4k^P1
[w<_Wj
public int get() { 0qNk.1pv
return queue[1]; M#4;y,n<k
} w?_8OJ
w =F9>
public void remove() { 8gNTW7W/
SortUtil.swap(queue,1,size--); YT8q0BR]
fixDown(1); :N<Qk
} _fk}d[q0
file://fixdown Pi"?l[T0
private void fixDown(int k) { 8lx}0U
int j; 6V$ )ym*F
while ((j = k << 1) <= size) { UY9*)pEE
if (j < size %26amp;%26amp; queue[j] j++; [c=Wp
if (queue[k]>queue[j]) file://不用交换 =aB+|E
break; # l9VTzi
SortUtil.swap(queue,j,k); m^XO77"
k = j; yn!;Z._
} "=DQ {(L
} /#T{0GBXe
private void fixUp(int k) { ,X3D<wl
while (k > 1) { yL asoh
int j = k >> 1; `5- ;'nX
if (queue[j]>queue[k]) <VD7(j]'^
break; C<teZz8/w
SortUtil.swap(queue,j,k); fSd|6iFH
k = j; \h'7[vkr
} =b*GV6b
} h'S0XU ;
TP#Ncqh
} Io<T'K
bp'%UgA)1
} ZB1%Kn#zo4
(5] [L<L
SortUtil： Pteti
sT1k]duT
package org.rut.util.algorithm; ;R0LJApey
B ZU@W%E
import org.rut.util.algorithm.support.BubbleSort; +)yoQRekX
import org.rut.util.algorithm.support.HeapSort; [nHN@p|
import org.rut.util.algorithm.support.ImprovedMergeSort; v\bWQs1
import org.rut.util.algorithm.support.ImprovedQuickSort; axmq/8X
import org.rut.util.algorithm.support.InsertSort; l4T[x|')M
import org.rut.util.algorithm.support.MergeSort; `#iL'ND[
import org.rut.util.algorithm.support.QuickSort; `=pA;R9
import org.rut.util.algorithm.support.SelectionSort; .Bkfe{^
import org.rut.util.algorithm.support.ShellSort; 1.@{5f3T
`EgX#
/** H2|'JA#v
* @author treeroot x7e0&
* @since 2006-2-2 F^{31iU~CX
* @version 1.0 zf)*W#+
*/ 4r_*: $g
public class SortUtil { '2Zs15)V
public final static int INSERT = 1; T\Xf0|y
public final static int BUBBLE = 2; #xx.yn(7
public final static int SELECTION = 3; T\.~!Q
public final static int SHELL = 4; +fY@q,`
public final static int QUICK = 5; Kh4rl)L*+%
public final static int IMPROVED_QUICK = 6; #@-dT,t
public final static int MERGE = 7; $W}:,]hoj
public final static int IMPROVED_MERGE = 8; JcYY*p
public final static int HEAP = 9; dpE^BWv3
~Qif-|[V
public static void sort(int[] data) { Kn$t_7AF^
sort(data, IMPROVED_QUICK); ?`Z:vqp>Z
} bn|HvLQ"1
private static String[] name={ M^\`~{*T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6?5dGYAX<
}; 6H2Bf*i
-}4CY\d6'
private static Sort[] impl=new Sort[]{ H[:lQ\
new InsertSort(), ,#BD/dF
new BubbleSort(), sKW~+]
new SelectionSort(), {9;-5@b
new ShellSort(), tkm@&e=e%
new QuickSort(), E3p$^['vx
new ImprovedQuickSort(), whe%o
new MergeSort(), lE%KzX?&
new ImprovedMergeSort(), v B~VJKD
new HeapSort() !oi {8X@
}; 9ec?L
ye(av&Hn
public static String toString(int algorithm){ %VB4/~ "
return name[algorithm-1]; Ys_LGfK
} o1\N)%
19[oXyFI
public static void sort(int[] data, int algorithm) { , 0X J|#%
impl[algorithm-1].sort(data); +MHIZI
} .nEMd/pX
Ar~<l2,{r
public static interface Sort { d]K8*a%[-
public void sort(int[] data); ,Gbc4x
} Ha]vG@?+
416}# Mk
public static void swap(int[] data, int i, int j) { #k/T\PQ0s
int temp = data; }LS.bQKqi,
data = data[j]; ?`Mk$Y%my
data[j] = temp; |Wck-+}U
} ,_V/W'
} z@ZI$.w