[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; l>Ub!^;
} 0IQ'3_
int i1=l; {.yStB.T
int i2=mid+1; ]xguBh]
for(int cur=l;cur<=r;cur++){ /y^7p9Z`
if(i1==mid+1) F:6SPY y
data[cur]=temp[i2++]; 1sPdz L
else if(i2>r) bT 2a40ul
data[cur]=temp[i1++]; FQ>`{%>
else if(temp[i1] data[cur]=temp[i1++]; bzdb|I6Z
else 0i8LWX_M
data[cur]=temp[i2++]; ^ wY[3"{
} /r12h|
} v)2M1
`vc "Q/
} b)9'bJRvU
PMfkA!.Y
改进后的归并排序: W>q HFoKa
6sa"O89
package org.rut.util.algorithm.support; ~G27;Npy
8foJI^3
import org.rut.util.algorithm.SortUtil; YC_1Ks
;<0LXYL;
/** 'R&uD~Q
* @author treeroot Yq(G;mjM
* @since 2006-2-2 /m!Cc/Hv
* @version 1.0 lo'W1p
*/ hDV20&hq
public class ImprovedMergeSort implements SortUtil.Sort { 8ssJ<LP
<cA/<3k)
private static final int THRESHOLD = 10; J)mhu}
%F kMv
/* v\`9;QV5
* (non-Javadoc) p-+K4
* 8EVgoJ.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BL 3gKx.'
*/ a,78l@d(
public void sort(int[] data) { TNQP"9[?
int[] temp=new int[data.length]; s}pIk.4ot!
mergeSort(data,temp,0,data.length-1); D1nq2GwS
} w,R[C\#J
?YeWH WM
private void mergeSort(int[] data, int[] temp, int l, int r) { !Ci~!)$z6
int i, j, k; 6rS$yjTX!
int mid = (l + r) / 2; OLI$1d_
if (l == r) eHDef
return; ^Q&u0;OJ
if ((mid - l) >= THRESHOLD) e)E$}4
mergeSort(data, temp, l, mid); w,Ee>cV]a
else v:+~9w+
insertSort(data, l, mid - l + 1); !45.puL0
if ((r - mid) > THRESHOLD) 7bDHXn
mergeSort(data, temp, mid + 1, r); wu"&|dt
else b=3H
insertSort(data, mid + 1, r - mid); _,</1~.
nNXgW
for (i = l; i <= mid; i++) { *'"^NSJ
temp = data; <, 3ROo76
} c^`]`xiX
for (j = 1; j <= r - mid; j++) { %7O?JI[
temp[r - j + 1] = data[j + mid]; uIU5.\"s
} ki>~H!zB
int a = temp[l]; #2iD'>bQ
int b = temp[r]; wp7!>%s{
for (i = l, j = r, k = l; k <= r; k++) { |a{Q0:
if (a < b) { )/t?!T.[
data[k] = temp[i++]; C;(t/zh
a = temp; 42L @w
} else { eSW{Cb
data[k] = temp[j--]; $`Ix:gi
b = temp[j]; fL]Pztsk+
} _w*}\~`=^
} I5h[%T
} [%&ZPJT%i
@]bPVG?d
/** g:0#u;j^7
* @param data Zf5`XslA.
* @param l 2c?qV
* @param i d,$d~alY
*/ ,.gQ^^+=
private void insertSort(int[] data, int start, int len) { 'EFyIVezg9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); } G<rt
} id?h>g
} xooY'El*#
} yUPIY:0
} jjM{]
aTBR|US
堆排序： {-BRt)L[
f3|@|' ;
package org.rut.util.algorithm.support; -l}IZY
[=%TnT+^9
import org.rut.util.algorithm.SortUtil; _20#2i&
vy,&N^P
/** $)H@|<K
* @author treeroot dJ?XPo"Cm=
* @since 2006-2-2 }KhjlPhx
* @version 1.0 7H>@iI"?
*/ n[YEOkiG
public class HeapSort implements SortUtil.Sort{ yz2Ci0Dwy
:iR \%
/* (non-Javadoc) !gnj]k&/c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o->\vlbD
*/ $Ci0I+5w
public void sort(int[] data) { X,8<oX1r
MaxHeap h=new MaxHeap(); ,7XtH>2s
h.init(data); SR*wvQnOx
for(int i=0;i h.remove(); ?|e'Gbb_
System.arraycopy(h.queue,1,data,0,data.length); (Z5##dS3
} @E.k/G!~Nb
1 y}2+Kk
private static class MaxHeap{ ! Q<>3xZ
lcV<MDS
void init(int[] data){ ET];%~ ^
this.queue=new int[data.length+1]; &uUo3qXQ5l
for(int i=0;i queue[++size]=data; >yJ9U,Y
fixUp(size); mJB2)^33a
} fI\9\x
} ^`f*'Z
%<8nF5
private int size=0; !A1)|/a@
'Pvm8t
private int[] queue; - y9>;6
n}xhW'3hU=
public int get() { ?OdJqw0,G
return queue[1]; /=uMk]h
} Vx_rc%'
f.GETw
public void remove() { F_uY{bg
SortUtil.swap(queue,1,size--); 3?E8\^N\n
fixDown(1); j]0^y}5f+s
} .}')f;jH5<
file://fixdown fA48(0p
private void fixDown(int k) { 80M;4nH^5
int j; R_sC! -
while ((j = k << 1) <= size) { 2wqk,c[]
if (j < size %26amp;%26amp; queue[j] j++; .lhn;*Yi
if (queue[k]>queue[j]) file://不用交换 ^[Cv26
break; w<9>Q1(
SortUtil.swap(queue,j,k); 5BR5X\f0
k = j; juBw5U<
} ZDL']*)'
} U}Hwto`R
private void fixUp(int k) { x]5@>5
while (k > 1) { $N2SfyX7
int j = k >> 1; 9{j66
if (queue[j]>queue[k]) ,%bhyww<
break; U=sh[W
SortUtil.swap(queue,j,k); i~J;G#b
k = j; YGc^h(d
} ^% Q|s#w.
} B~'MBBD"
0:KE@=
} (yo;NKq,@
<ktzT&A
} )x#5Il H
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SortUtil： 9]$8MY
a'\By?V]
package org.rut.util.algorithm; ')S;[=v
vhr+g 'tf
import org.rut.util.algorithm.support.BubbleSort; }G$]LWgQx
import org.rut.util.algorithm.support.HeapSort; yz+, gLY
import org.rut.util.algorithm.support.ImprovedMergeSort; "x'),
import org.rut.util.algorithm.support.ImprovedQuickSort; h x6;YV
import org.rut.util.algorithm.support.InsertSort; b=a!j=-D
import org.rut.util.algorithm.support.MergeSort; ea=83 Zj
import org.rut.util.algorithm.support.QuickSort; Wi n8LOC
import org.rut.util.algorithm.support.SelectionSort; 0%s|Zbo!>
import org.rut.util.algorithm.support.ShellSort; &$`hQgi
{+zJI-XN/
/** *5$&`&,
* @author treeroot AgF5-tz6x
* @since 2006-2-2 +)nT|w45
* @version 1.0 !\[+99F#
*/ ~`Qko-a&
public class SortUtil { M^rM-{?<
public final static int INSERT = 1; >95TvJ
public final static int BUBBLE = 2; Hg}I]!B
public final static int SELECTION = 3; +w|9x.&W
public final static int SHELL = 4; V's:>;
public final static int QUICK = 5; XC15K@K
public final static int IMPROVED_QUICK = 6; FDFH,J`_
public final static int MERGE = 7; RaSz>-3d
public final static int IMPROVED_MERGE = 8; e2$]g>
public final static int HEAP = 9; .V6-(d
gM;}#>6
public static void sort(int[] data) { XM Vq-8B0
sort(data, IMPROVED_QUICK); [AEBF2OIv
} TY;U2.Ud
private static String[] name={ NCA{H^CL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @D`zKYwX1
}; i`%.
j&6 jRX
private static Sort[] impl=new Sort[]{ &;H{cv`
new InsertSort(), Iy {U'a!
new BubbleSort(), ZeasYSo4P
new SelectionSort(), $7I]`Jt
new ShellSort(), _8K%`6!"Z
new QuickSort(), 9Z\z96O-
new ImprovedQuickSort(), V'Y{v
new MergeSort(), *.y'(tj[
new ImprovedMergeSort(), aI#4H+/
new HeapSort() #`tD1T{;
}; yeD_j/
'Tb0-1S?
public static String toString(int algorithm){ c-XLI
return name[algorithm-1]; FYPz 4K
} E(+T*
)&W|QH=AI
public static void sort(int[] data, int algorithm) { e/e0d<(1
impl[algorithm-1].sort(data); Pn TZ/|
} jeN1eM8WI
6(56,i<#/
public static interface Sort { h\,5/ )Y
public void sort(int[] data); VlW9UF-W
} 'zSgCgCHX8
;np_%?is
public static void swap(int[] data, int i, int j) { `rWB`q|i<
int temp = data; n~z\?Y=*
data = data[j]; G=M] 8+h
data[j] = temp; 4 9w=kzo
} YaFcz$GE_
} -oBI+v&