[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; (T|q]29
} BI|YaZa+p
int i1=l; ^_ST#fFS
int i2=mid+1; Q4h6K7
for(int cur=l;cur<=r;cur++){ zPc kM)
if(i1==mid+1) LQz6op}R
data[cur]=temp[i2++]; LK:Jkjp^
else if(i2>r) N9cCfB\`
data[cur]=temp[i1++]; hCpcX"wND
else if(temp[i1] data[cur]=temp[i1++]; -$sVqR>_
else $!v:@vNMs
data[cur]=temp[i2++]; py }`thx
} g:eqB&&
} ?:DUsg
*bSxobn
} 1"wZ [.
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改进后的归并排序: !g7lJ\B
\'CA:9V}
package org.rut.util.algorithm.support; ~-f"&@){,
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import org.rut.util.algorithm.SortUtil; D~b_nFD
?k$'po*Eq
/** (sqI:a
* @author treeroot qV5lv-p
* @since 2006-2-2 2bu>j1h
* @version 1.0 de_%#k1:L
*/ *Xl,w2@
public class ImprovedMergeSort implements SortUtil.Sort { b'%)?{E
%R^*MUTx
private static final int THRESHOLD = 10; ps_q3Cyp
5@_kGoqd
/* YL&)@h
* (non-Javadoc) 8Z!Mad
* p(!d,YSE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sjp ]TWj
*/ :nS$cC0x*
public void sort(int[] data) { Hu$y8_Udw
int[] temp=new int[data.length]; K05U>151
mergeSort(data,temp,0,data.length-1); SS6K7
} ha?M[Vyw4Q
>%H(0G#X
private void mergeSort(int[] data, int[] temp, int l, int r) { ckYT69U
int i, j, k; SW}?y%~
int mid = (l + r) / 2; Rga *68s|&
if (l == r) $`[TIyA9!
return; m5v IS
if ((mid - l) >= THRESHOLD) yoH,4,!G
mergeSort(data, temp, l, mid); e}+Zj'5
else E[cH/Rm
insertSort(data, l, mid - l + 1); Bo$dIn2_
if ((r - mid) > THRESHOLD) mKsJ[)#.
mergeSort(data, temp, mid + 1, r); ejc>
else t:"3MiM=c
insertSort(data, mid + 1, r - mid); 2ZEDyQM
sYbmL`{
for (i = l; i <= mid; i++) { uUb`Fy9
temp = data; IN75zn*%
} ]$=#:uf
for (j = 1; j <= r - mid; j++) { 03c8VKp'p
temp[r - j + 1] = data[j + mid]; 6{quO#!
} m}7Nu
int a = temp[l]; /0o#V-E)
int b = temp[r]; adPd}rt;
for (i = l, j = r, k = l; k <= r; k++) { &M:o(T
if (a < b) { aS``fE;O
data[k] = temp[i++]; KP&xk13)
a = temp; 3l"8_zLP
} else { THARr#1b};
data[k] = temp[j--]; n(`|:h"
b = temp[j]; d<6m_!L
} %/ctt_p0x
} >g m
} [8~P Pc^
_N=f&~T
/** hI9q);g
* @param data C57m{RH
* @param l K?Sy?Kz
* @param i )xiu \rC
*/ ~oJ"si
private void insertSort(int[] data, int start, int len) { skBD2V4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q'qX`K+@`
} &36SX<vZ
} ,ga6
} I]DD5l}\
} r?IBmatK/
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堆排序： C$0g2X
v`{N0R
package org.rut.util.algorithm.support; R1D ;
tbWfm5$
import org.rut.util.algorithm.SortUtil; Nk<^ Qv
!?v_.
/** U`lK'..
* @author treeroot bK.*v4RG
* @since 2006-2-2 P#,;)HF
* @version 1.0 Bp3E)l
*/ 5mC"8N1)
public class HeapSort implements SortUtil.Sort{ ,2^4"gIl
j:xC\b47"
/* (non-Javadoc) AYgXqmH~+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N+h05`
*/ ^lAM /
public void sort(int[] data) { 7@ )
MaxHeap h=new MaxHeap(); 5nUJ9sqA
h.init(data); 8AX_y3$
for(int i=0;i h.remove(); __2<v?\
System.arraycopy(h.queue,1,data,0,data.length); D:;idUO
} t*=[RS*
An$2='=/
private static class MaxHeap{ >WIc"y.
i=cST8!8N
void init(int[] data){ l6y}>]
this.queue=new int[data.length+1]; %/"n(?$W
for(int i=0;i queue[++size]=data; }Nsdk',}
fixUp(size); b:D92pH
} j/z=<jA
} B*,)@h
_ i}W1i
private int size=0; mAtqF %V
@kqxN\DE
private int[] queue; =c'4rJ$+
?B1Zfu0
public int get() { "FWx;65CR
return queue[1]; k~^4
} njF$1? )sq
RZzHlZ
public void remove() { 4"|Xndh1.
SortUtil.swap(queue,1,size--); IHni1
fixDown(1); \</!kY*3@t
} G aV&y
file://fixdown )1uiY f&k
private void fixDown(int k) { S^eem_C
int j; [OW <<6
while ((j = k << 1) <= size) { 5 wrRtzf
if (j < size %26amp;%26amp; queue[j] j++; Lwr's'ao.
if (queue[k]>queue[j]) file://不用交换 ?T/]w-q>
break; 9{*{Ba
SortUtil.swap(queue,j,k); u4C9ZYN
k = j; h0'*)`;z
} C9!t&<\}
} K*SgEkb'l
private void fixUp(int k) { {> YsrD C
while (k > 1) { Y~WdN<g
int j = k >> 1; )l7XZ_gw'
if (queue[j]>queue[k]) ^#HaH
break; 7$'AH:K
SortUtil.swap(queue,j,k); j uA@"SG
k = j; {A/r)
} zm"
} y9r4]45
"mK`3</G
} #ibwD:{
2:*15RH3
} "do5@$p|
=AIFu\9#a`
SortUtil： E^1yU
CS7b3p!I
package org.rut.util.algorithm; srVWN:uuH
L4>14D\
import org.rut.util.algorithm.support.BubbleSort; 1dQAo1
import org.rut.util.algorithm.support.HeapSort; 9/k2zXY
import org.rut.util.algorithm.support.ImprovedMergeSort; DYf QlA
import org.rut.util.algorithm.support.ImprovedQuickSort; T:za},-
import org.rut.util.algorithm.support.InsertSort; kL'4m
import org.rut.util.algorithm.support.MergeSort; T lXS}5^
import org.rut.util.algorithm.support.QuickSort; q"VmuQ
import org.rut.util.algorithm.support.SelectionSort; + -<8^y
import org.rut.util.algorithm.support.ShellSort; D!`[fjs6A
j1_>>xB
/** E{,WpU
* @author treeroot YWIA(p8Qkk
* @since 2006-2-2 0~nX7
* @version 1.0 7P$*qj~Vh
*/ .x=abA$!9
public class SortUtil { -M{szH
public final static int INSERT = 1; ,$6si
public final static int BUBBLE = 2; +3))G
public final static int SELECTION = 3; B&MDn']fV/
public final static int SHELL = 4; Xe4
public final static int QUICK = 5; 4 $k{,
public final static int IMPROVED_QUICK = 6; a!o%x
public final static int MERGE = 7; .U{}N%S
public final static int IMPROVED_MERGE = 8; 6nA9r5Ghv
public final static int HEAP = 9; M(>74(}]
4zs0+d+
public static void sort(int[] data) { 9"[,9HN
sort(data, IMPROVED_QUICK); }oD^tU IK
} %qV:h#
private static String[] name={ myo4`oH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'A[PUSEE
}; 2z;nPup,
_#~D{91 j:
private static Sort[] impl=new Sort[]{ /%g@ ;
new InsertSort(), U/Cc!WXV]
new BubbleSort(), xZ'C(~t
new SelectionSort(), Lq3<&$
new ShellSort(), tO&n$$
new QuickSort(), X[/7vSqZ@w
new ImprovedQuickSort(), j~bNH~3
new MergeSort(), !}} )f/
new ImprovedMergeSort(), C#[P<=v
new HeapSort() /sYr?b!/<6
}; 8A0a/ 7Lj
1TEKq#t;y
public static String toString(int algorithm){ 2(uh7#Q
return name[algorithm-1]; /pRv i>_(:
} fbM>jK
(e;/Smol
public static void sort(int[] data, int algorithm) { "Pc}-&
impl[algorithm-1].sort(data); (0@b4}Z
} 8i^ ./P
C\{ KB@C\*
public static interface Sort { a?ete9Q+
public void sort(int[] data); me@`;Q3
} E#d~.#uH
X#by Dg
public static void swap(int[] data, int i, int j) { o]I8Ghk>/z
int temp = data; S5gBVGh
data = data[j]; ;mI^J=V3
data[j] = temp; Ze/\IBd
} fJNK@F
} 'PrBa[%