[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; eE#81]'6a
} @SF")j|
int i1=l; ^-csi
int i2=mid+1; /:*R -VdF
for(int cur=l;cur<=r;cur++){ n##w[7B*
if(i1==mid+1) /jK17}j
data[cur]=temp[i2++]; it/C y\f
else if(i2>r) ]XpU'/h>q;
data[cur]=temp[i1++]; H$=h-
else if(temp[i1] data[cur]=temp[i1++]; pDq^W@Rq
else b3y,4ke"
data[cur]=temp[i2++]; Ca`/t8=
} |2+F I<v4
} {=pP`HD0
z</XnN
} N~Sue
~,`\D7Z3
改进后的归并排序: YDZ1@N}^B
w'5dk3$"
package org.rut.util.algorithm.support; .H[Lo>
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import org.rut.util.algorithm.SortUtil; Hm8EYPrJ
;k63RNT,M&
/** ] fwTi(4y
* @author treeroot 6U,U[MWJ
* @since 2006-2-2 ShsP]$Yp
* @version 1.0 fO^EMy\
*/ .eDxIWW+ft
public class ImprovedMergeSort implements SortUtil.Sort { rt\<nwc
6"rFfdns
private static final int THRESHOLD = 10; gl(6m`a>
!,-qn)b
/* Li<266#A!
* (non-Javadoc) wzLiVe-
* CpP$HrQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B 3,ig9
*/ Fm[?@Z&wP
public void sort(int[] data) { Vqv2F @.
int[] temp=new int[data.length]; DY+8m8!4H
mergeSort(data,temp,0,data.length-1); e) /u>I
} !z4Hj{A_
a s<q
private void mergeSort(int[] data, int[] temp, int l, int r) { MRl*rK
int i, j, k; Ik@Q@ T"
int mid = (l + r) / 2; gYH:EuY,
if (l == r) S#%JSQo:
return; H?/cG_^y0
if ((mid - l) >= THRESHOLD) 7]HIE]#
mergeSort(data, temp, l, mid); Ph7(JV{
else U%B]N@
insertSort(data, l, mid - l + 1); C}DG'z9
if ((r - mid) > THRESHOLD) /iJcy:J
mergeSort(data, temp, mid + 1, r); #9W5
else PUFW^"LV
insertSort(data, mid + 1, r - mid); w]+BBGYQKb
?` ZGM
for (i = l; i <= mid; i++) { {$QF*j
temp = data; hz~CW-47
} 5+Zx-oWq_
for (j = 1; j <= r - mid; j++) { EuimZW\V
temp[r - j + 1] = data[j + mid]; 1o"oa<*_
} XKPt[$ab
int a = temp[l]; A](}"Pi!n
int b = temp[r]; ?D$b%G{
for (i = l, j = r, k = l; k <= r; k++) { s%TO(vT
if (a < b) { @*`UOgP7
data[k] = temp[i++]; |{|r?3
a = temp; G]3ML)l
} else { :Ro" 0/d
data[k] = temp[j--]; F#37Qv
b = temp[j]; *mhw5Z=!
} 5)zh@aJ@
} .]P;fCQmM
} &fNE9peQFa
lt(-,md
/** p~zTRnm
* @param data a518N*]j
* @param l uL2{v
* @param i Vwh&^{Eh
*/ qu~"C,
private void insertSort(int[] data, int start, int len) { LXEu^F~{u#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0 c'2rx
} s?\9i6
} fOjt` ~ToI
} $q@RHcj
} )eGu4iEPM
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堆排序： %IH|zSr)EM
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package org.rut.util.algorithm.support; AYQh=$)(
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import org.rut.util.algorithm.SortUtil; .gsu_N_v
KL\=:iWA
/** $=g.-F%*=
* @author treeroot rxK[CDM,
* @since 2006-2-2 d~f0]O
* @version 1.0 9qO:K79|
*/ rpP+20v
public class HeapSort implements SortUtil.Sort{ YHv,Z|.w
MVU'GHv
/* (non-Javadoc) ppo$&W &z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H=SMDj)s+
*/ :x5o3xE
public void sort(int[] data) { Pv$"DEXA2
MaxHeap h=new MaxHeap(); 6g,3s?aT
h.init(data); 8{=(#]
for(int i=0;i h.remove(); 7/$Z7J!k
System.arraycopy(h.queue,1,data,0,data.length); (a4y1k t-
} 8_,wOkk_B
exMPw;8
private static class MaxHeap{ y42T.oK8c
o6yZ@R
void init(int[] data){ O09g b[
this.queue=new int[data.length+1]; C]cT*B^
for(int i=0;i queue[++size]=data; aZCZ/
fixUp(size); 5N</Z6f'o
} n)7$xYuH
} ]be2jQx3
\c^jaK5
private int size=0; O NzdCgY
(V%vFD1)
private int[] queue; X!HSS/'
^>}[[:(6/
public int get() { [67f;?b
return queue[1]; d1_*!LW$
} JRs[%w`kD
;? QAPTz
public void remove() { #:5g`Ch4,
SortUtil.swap(queue,1,size--); ~5qZs"ks
fixDown(1); f6A['<%o
} jl%eO.
file://fixdown 1UWgOCc
private void fixDown(int k) { EC\:uK
int j; gK_[3FiKt
while ((j = k << 1) <= size) { b6M)qt9R
if (j < size %26amp;%26amp; queue[j] j++; iYs?B0*JWK
if (queue[k]>queue[j]) file://不用交换 :hdh$}y
break; %lW:8ckL
SortUtil.swap(queue,j,k); l{x#*~ga
k = j; pY5HW2TsY|
} @MH]s [{o\
} !/9Sb1_~
private void fixUp(int k) { exU=!3Ji
while (k > 1) { `5jB|r/
int j = k >> 1; [4yQbqe;
if (queue[j]>queue[k]) H LGy"P
break; ]*Ki7h|B
SortUtil.swap(queue,j,k); WC;a
k = j; &8L\FAY0%9
} &!fcLJd
} 'UCx^-
AQU: 0
} AdW7 vn
]Y! Vyn
} eV}Tx;1|}
vK~KeZ\,p=
SortUtil： ;P#*R3
!sWBj'[>
package org.rut.util.algorithm; dR{ V,H7N
70(?X/5#
import org.rut.util.algorithm.support.BubbleSort; ZO$T/GE6%
import org.rut.util.algorithm.support.HeapSort; Qj[O$L0 $
import org.rut.util.algorithm.support.ImprovedMergeSort; [)c|oh%
import org.rut.util.algorithm.support.ImprovedQuickSort; C^O^Jj5X%
import org.rut.util.algorithm.support.InsertSort; p[:%Ck"$7
import org.rut.util.algorithm.support.MergeSort; <OB~60h"
import org.rut.util.algorithm.support.QuickSort; ?LM'5
import org.rut.util.algorithm.support.SelectionSort; ~]+ jn
import org.rut.util.algorithm.support.ShellSort; "b7C0NE
?"u-@E[m
/** nP5fh_/
* @author treeroot ^<+heX
* @since 2006-2-2 ^Z+D7Q
* @version 1.0 >1zzDd_
*/ p$v +L
public class SortUtil { z*1K<w8
public final static int INSERT = 1; uS,$P34^oy
public final static int BUBBLE = 2; fdW={}~
public final static int SELECTION = 3; bd}SB-D
public final static int SHELL = 4; ?QVI'R:Z?
public final static int QUICK = 5; -2d&Aq4m)
public final static int IMPROVED_QUICK = 6; ;Nij*-U4~
public final static int MERGE = 7; I/|n ma/ $
public final static int IMPROVED_MERGE = 8; "V2$g
public final static int HEAP = 9; C>ZeG Vq
!-~(*tn
public static void sort(int[] data) { [GM<Wt0
sort(data, IMPROVED_QUICK); ^q2zqC
} ywte\}
private static String[] name={ ZeV)/g,w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v21?
}; S45_-aE
,BAF?}04=
private static Sort[] impl=new Sort[]{ Z8UM0B=i
new InsertSort(), -C<aB750O)
new BubbleSort(), Wno5B/V
new SelectionSort(), \ }f*
new ShellSort(), xc?<:h"
new QuickSort(), rfpxE>_|G
new ImprovedQuickSort(), 4F!d V;"Z(
new MergeSort(), [N)M]u
new ImprovedMergeSort(), =Y[Ae7e
new HeapSort() LcF3P 4
}; k=_@1b-
4y.[tk5
public static String toString(int algorithm){ _Oq\YQb v
return name[algorithm-1]; miqCUbcU
} xM\ApN~W
K(S/D(\ FL
public static void sort(int[] data, int algorithm) { Eq{TZV
impl[algorithm-1].sort(data); ,pzCJ@5
} -^DB?j+
UtN>6$u
public static interface Sort { jfamuu7
public void sort(int[] data); B?Skw{&
} (%}C
Y2EN!{YU
public static void swap(int[] data, int i, int j) { !)34tu2
int temp = data; ZbUf|#GTB
data = data[j]; p6'8l~W+
data[j] = temp; lH.2H
} |#6Lcz7[
} P_U-R%f