[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; MWK)Bn
} p.b#RY
int i1=l; %~kE,^
int i2=mid+1; 'Gamb+[
for(int cur=l;cur<=r;cur++){ 53d`+an2
if(i1==mid+1) lCBH3-0^
data[cur]=temp[i2++]; V<?0(esgR
else if(i2>r) -yb7s2o
data[cur]=temp[i1++]; At !:d3
else if(temp[i1] data[cur]=temp[i1++]; g"kET]KP"
else *ae)<l3v
data[cur]=temp[i2++]; p"- %~%J=
} 2.]d~\
} \RRSrPLd-
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} #p]V?
rixVIfVF
改进后的归并排序: S%B56|'
p=#/H,2
package org.rut.util.algorithm.support; W~a|AU8]C
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import org.rut.util.algorithm.SortUtil; PgHmOs
:SWrx MT
/** ^f-)gZ&
* @author treeroot {v|ib112;
* @since 2006-2-2 X.FoX
* @version 1.0 uI&0/
*/ 9I$}=&"
public class ImprovedMergeSort implements SortUtil.Sort { BwGOn)KL
H8B2{]HAt
private static final int THRESHOLD = 10; &4#%xg
Sa0IRC<LV
/* 3orL;(.G
* (non-Javadoc) 'o*\N%
* ;!lwB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g{uiY|
*/ ~66v.`K!
public void sort(int[] data) { GoH.0eQ^
int[] temp=new int[data.length]; ZNpC& "`G
mergeSort(data,temp,0,data.length-1); aY;34SF
} z@?y(E
0pl'*r*9
private void mergeSort(int[] data, int[] temp, int l, int r) { E>gLUMG$
int i, j, k; %cDDu$9;
int mid = (l + r) / 2; !0|&f>y
if (l == r) `ZO5-E
return; .sOZ"=tW
if ((mid - l) >= THRESHOLD) I9rQX9#B
mergeSort(data, temp, l, mid); bY*_6SPK4
else e%4vvPp
insertSort(data, l, mid - l + 1); RBg2iG$8|
if ((r - mid) > THRESHOLD) m^0 I3;
mergeSort(data, temp, mid + 1, r); _3O*"S=1
else |u$*'EsP
insertSort(data, mid + 1, r - mid); Zy{hYHQ
N~or.i&a
for (i = l; i <= mid; i++) { !{ _:k%B
temp = data; gkq~0/
} ~k?t
for (j = 1; j <= r - mid; j++) { pU,\ &3N
temp[r - j + 1] = data[j + mid]; aHI~@
} 30(e6T;
int a = temp[l]; p]Qe5@NT
int b = temp[r]; {ehYE^%N
for (i = l, j = r, k = l; k <= r; k++) { TaKHr$h
if (a < b) { 6W7,EIf
data[k] = temp[i++]; cXN0D\%`
a = temp; ^L Xr4
} else { .>PwbZ
data[k] = temp[j--]; +|K,\ {'U
b = temp[j]; 5GPAt
} C:bA:O
} -xJ\/"A
} RC8-6s& ln
\,:7=
/** #>BC|/P}
* @param data /BF7N3
* @param l L=s8em]7l
* @param i N "eK9>
*/ >SYOtzg%
private void insertSort(int[] data, int start, int len) { -~lrv#5Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2!{_x8,n
} Ls.g\Gl3
} rfZg
} ilQ\+xR{b
} q?L*Luu+
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堆排序： fg1uqS1rg
HJ!)&xT
package org.rut.util.algorithm.support; %VXIiu[
?q5HAIZ`
import org.rut.util.algorithm.SortUtil; uHDUuK:Ur
lb"T'}q
/** <!|=_W6
* @author treeroot 3z8zZ1uzU
* @since 2006-2-2 k<"N^+GSz
* @version 1.0 :b#5cMUe
*/ kaDn= ={YM
public class HeapSort implements SortUtil.Sort{ qrt2uE{K
nXxnyom,
/* (non-Javadoc) [~Z#yEiW^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X<1ymb3
*/ 3|Ar~_]
public void sort(int[] data) { `WQpGBS_z_
MaxHeap h=new MaxHeap(); SC2g5i`
h.init(data); !A_KCM:Ym
for(int i=0;i h.remove(); ];0:aSi#
System.arraycopy(h.queue,1,data,0,data.length); M49Hm[0(
} Z \-
_ `7[}M~
private static class MaxHeap{ Ax!fvcsN
$>%zNq-F
void init(int[] data){ wKz*)C
this.queue=new int[data.length+1]; "xD5>(|^+Q
for(int i=0;i queue[++size]=data; HsK52<
fixUp(size); vF@.BM>
} '9|R7
} `"bp-/
a\I`:RO=<Z
private int size=0; uRw%`J4H
8@I.\u)0
private int[] queue; 89A04HX
m$q*
public int get() { ]JI A\|b6
return queue[1]; 0+S'i82=M
} zU};|Zw
MK4CggoC
public void remove() { ^#2Y4[@
SortUtil.swap(queue,1,size--); 9, 792b
fixDown(1); Wy$Q!R=i
} );x[1*e
file://fixdown hzX&BI
private void fixDown(int k) { faI4`.i
int j; qk(u5Z
while ((j = k << 1) <= size) { H*>5ne=x
if (j < size %26amp;%26amp; queue[j] j++; 8m)E~6
if (queue[k]>queue[j]) file://不用交换 k+cHx799
break; HC ?XNR&
SortUtil.swap(queue,j,k); v#+tu,)V;
k = j; .'N#qs_
} = G3A}
} BH=CoD.
private void fixUp(int k) { w9a6F
while (k > 1) { %AuS8'Uf
int j = k >> 1; Aaix? |XN
if (queue[j]>queue[k]) WR"p2=
break; JTB5#S4W
SortUtil.swap(queue,j,k); 3836Di:{
k = j; N DV_/BI
} u8@>ThPD
} ]qc2jut"
S-+^L|
} l,3[hx
jDc5p3D&[]
} $eBE pN
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SortUtil： v4Q8RE?
%@FTg$
package org.rut.util.algorithm; #65Uei|F`+
1{V*(=Tp
import org.rut.util.algorithm.support.BubbleSort; |bz,cvlP W
import org.rut.util.algorithm.support.HeapSort; {GiR-q{t
import org.rut.util.algorithm.support.ImprovedMergeSort; `p%&c%*A
import org.rut.util.algorithm.support.ImprovedQuickSort; ]Z\.Vx
import org.rut.util.algorithm.support.InsertSort; <tg>1,C
import org.rut.util.algorithm.support.MergeSort; bXiT}5mJU
import org.rut.util.algorithm.support.QuickSort; jM3{A;U2
import org.rut.util.algorithm.support.SelectionSort; fhmqO0
import org.rut.util.algorithm.support.ShellSort; pJ5Sxgv{;
uIvE~<
/** L[*Xrp;/&
* @author treeroot 9YpD\H`
* @since 2006-2-2 ;[@< ,
* @version 1.0 $9\!CPZ2
*/ puz~Rfn#*
public class SortUtil { Vj"B#
public final static int INSERT = 1; PQ|kE`'
public final static int BUBBLE = 2; K/jC>4/c/
public final static int SELECTION = 3; DO$jX 4
public final static int SHELL = 4; eVDI7W:(Sn
public final static int QUICK = 5; pVt8z|p_;{
public final static int IMPROVED_QUICK = 6; T0Q)}%L
public final static int MERGE = 7; nrMm](Y45
public final static int IMPROVED_MERGE = 8; Uok?FEN
public final static int HEAP = 9; P/?`
yla&/K;|*
public static void sort(int[] data) { AjK'P<:/
sort(data, IMPROVED_QUICK); W9T,1h5x
} R;f!s/^)
private static String[] name={ Qe=!'u.nL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #|34(ML
}; wbzAX
5TVDt
private static Sort[] impl=new Sort[]{ QOkPliX
new InsertSort(), 'tp1|n/1
new BubbleSort(), c?CjJ}-7
new SelectionSort(), >v`lsCGb
new ShellSort(), \&J7>vu^y
new QuickSort(), !~cTe!T
new ImprovedQuickSort(), d:6?miMH]t
new MergeSort(), B8:_yAv o
new ImprovedMergeSort(), aO?(ZL
new HeapSort() SqTO~zGC
}; i!<,8e=
` IiAtS
public static String toString(int algorithm){ U&|=dH]-
return name[algorithm-1]; ";cWK29\f
} ` a5$VV%J
e7ixi^Q
public static void sort(int[] data, int algorithm) { 52BlFBNV
impl[algorithm-1].sort(data); _mKO4Atw
} NWSBqL5v
Q_xE:#!;
public static interface Sort { ig]*Z
public void sort(int[] data); TGGeTtk=
} [L8Bgw1
X~GnK>R
public static void swap(int[] data, int i, int j) { nM1U=Du
int temp = data; [XjJsk,
data = data[j]; H?8KTl=e
data[j] = temp; .xuLvNyQr
} Z}TuVE
} p mcy(<