[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<K/bzB3z
} Y3?)*kz%
int i1=l; XSe\@t~&g
int i2=mid+1; &W$s-qf".
for(int cur=l;cur<=r;cur++){ &a?k1R>
if(i1==mid+1) I9O%/^5^[w
data[cur]=temp[i2++]; T1g3`7C3
else if(i2>r) lkaWwjv_D
data[cur]=temp[i1++]; UA(&_-C\
else if(temp[i1] data[cur]=temp[i1++]; F`RPXY`ux
else %SN"<O!
data[cur]=temp[i2++]; 4s7&*dJ
} u/(~ewI
} /DoSU>%hK
{P!1VYs5
} 4O:y ?D/e
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改进后的归并排序: gfly?)VnF
c,FZ{O@
package org.rut.util.algorithm.support; 0artR~*}
g&?{^4t]
import org.rut.util.algorithm.SortUtil; l$g \t]
=a!_H=+4
/** \<W/Z.}/
* @author treeroot F6gU9=F1<
* @since 2006-2-2 /SD(g@G,
* @version 1.0 ]jgMN7
*/ BY`vs+]XY
public class ImprovedMergeSort implements SortUtil.Sort { Fb\ E39
:'X:cL
private static final int THRESHOLD = 10; wL~-k
^!*nhs%
/* 8\Kpc;zb
* (non-Javadoc) n'qWS/0U=
* {B7${AE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K7=>o*p
*/ ,U?^u%
public void sort(int[] data) { A#8J6xcSrL
int[] temp=new int[data.length]; bO+]1nZ.
mergeSort(data,temp,0,data.length-1); <KBS ;t="1
} a9g~(#?a
\/F*JPhy
private void mergeSort(int[] data, int[] temp, int l, int r) { AfvIzsT0
int i, j, k; L*(`ccU
int mid = (l + r) / 2; G|.6%-
if (l == r) #&K?N
return; DLD5>
if ((mid - l) >= THRESHOLD) PpezWo)9
mergeSort(data, temp, l, mid); !Wz4BBU8o
else n<e1=L
insertSort(data, l, mid - l + 1); mKuY=#RP
if ((r - mid) > THRESHOLD) r2T$ ;m.
mergeSort(data, temp, mid + 1, r); vq:?a
else 0^K2"De
insertSort(data, mid + 1, r - mid); a[@Y>
rk &ME#<r
for (i = l; i <= mid; i++) { 7\[)5j
temp = data; .,<w_=
} iaHL&)[YK
for (j = 1; j <= r - mid; j++) { qFN`pe,
temp[r - j + 1] = data[j + mid]; cyBm,!
} K@tELYb
int a = temp[l]; -S7i':
int b = temp[r]; O'h f8w
for (i = l, j = r, k = l; k <= r; k++) { @ )Nw>/;o
if (a < b) { TGHyBPJb
data[k] = temp[i++]; (Rh$0^)A
a = temp; 2hsRYh
} else { -8:/My
data[k] = temp[j--]; Q!70D)O$
b = temp[j]; $;Z0CG
} .~X&BY>qP
} KW(^-:wmr
} oaG;i51!
5QP`2I_n
/** &[P(}??Y\
* @param data jwmPy)X|s\
* @param l TgA>(HcO
* @param i 13fyg7^JP
*/ /Xl(>^|&
private void insertSort(int[] data, int start, int len) { Pye/o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :QIf0*.O
} Nr?CZFN#
} sGG q~7
} Cs2kbG_
} lf#5X)V
= OzpI
堆排序： r6vI6|1
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package org.rut.util.algorithm.support; IO7cRg'-F
||Vx:(d7D&
import org.rut.util.algorithm.SortUtil; Qt>Bvu Q
$kccM&B
/** )v\ A8)[
* @author treeroot 'm0_pM1:D
* @since 2006-2-2 /sr.MT
* @version 1.0 yVWt%o/
*/ cCs@[D#O1
public class HeapSort implements SortUtil.Sort{ )M*Sg?L
%xA-j]%?ep
/* (non-Javadoc) kgd dq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B]I*ymc#
*/ {t|Q9&
public void sort(int[] data) { =!u]t&yv
MaxHeap h=new MaxHeap(); gts09{"}Y
h.init(data); hISYtNWjd"
for(int i=0;i h.remove(); +2>, -V
System.arraycopy(h.queue,1,data,0,data.length); Q w)U
} w5=<}1`St
kQ"Ax? b
private static class MaxHeap{ Hi^Z`97c
rJ(AO'=
void init(int[] data){ +I+RNXR/{
this.queue=new int[data.length+1]; C!Jy;Z=+u
for(int i=0;i queue[++size]=data; m[ER~]L/C
fixUp(size); `+i/rc1.
} hPuF:iiQ4
} a:KL{e[
zEh&@{u?
private int size=0; `aSbGMz
b^A7R{G7
private int[] queue; 2 SU
Bf;<3k)5.
public int get() { A@Cvx7X
return queue[1]; ~:*V'/2k
} #vc!SI
' pIC~
public void remove() { *;T'=u_lR
SortUtil.swap(queue,1,size--); &5*t*tI
fixDown(1); *Ag3qnY
} uK0L>
file://fixdown qp{~OW3
private void fixDown(int k) { nfh<3v|kvR
int j; \H 5t-w=
while ((j = k << 1) <= size) { 8%p+:6kP5
if (j < size %26amp;%26amp; queue[j] j++; ),H1z`c&I
if (queue[k]>queue[j]) file://不用交换 E:;MI{;7
break; 4#W*f3d[@:
SortUtil.swap(queue,j,k); L s+zJ1
k = j; yq!peFu
} Y=,9M
} Gn4XVzB`O
private void fixUp(int k) { b>]UNf"-
while (k > 1) { >^SQrB
int j = k >> 1; BZIU@^Q_Y[
if (queue[j]>queue[k]) +0%Y.O/{
break; 0}M'>
SortUtil.swap(queue,j,k); EyHL&
k = j; jI~$iDdOfs
} H9Vn(A8&`
} `JyI`@,!
^CD?SP"i
} ^S 45!mSb
n8JM 0 U-
} aSI%!Vg.
i=&]%T6Qk
SortUtil： )1 QOA
9A87vs4[
package org.rut.util.algorithm; /S@iF
:w)9(5
import org.rut.util.algorithm.support.BubbleSort; ;zd.KaS
import org.rut.util.algorithm.support.HeapSort; GC_c.|'6[
import org.rut.util.algorithm.support.ImprovedMergeSort; )~`UDaj_
import org.rut.util.algorithm.support.ImprovedQuickSort; _Ud!tK*H
import org.rut.util.algorithm.support.InsertSort; +pQ3bX
import org.rut.util.algorithm.support.MergeSort; s[VYd:}se
import org.rut.util.algorithm.support.QuickSort; c4zGQoeH:
import org.rut.util.algorithm.support.SelectionSort; olKM0K
import org.rut.util.algorithm.support.ShellSort; w-C%,1F,/
=E-o@#BS
/** O\6gw$
* @author treeroot ,$U~<Zd
* @since 2006-2-2 !pHI`FeAV
* @version 1.0 "sWsK %
*/ x$FcF8
public class SortUtil { <9c{Kt.5(
public final static int INSERT = 1; wO6>jW 7
public final static int BUBBLE = 2; \7IT[<Se
public final static int SELECTION = 3; 2B5Ez,'#x
public final static int SHELL = 4; o_5[}d
public final static int QUICK = 5; n/e,jw
public final static int IMPROVED_QUICK = 6; $GHi9aj_P
public final static int MERGE = 7; FF0~i+5
public final static int IMPROVED_MERGE = 8; oE2VJKs<B
public final static int HEAP = 9; h8-uI.RZ
}a#=c*+_
public static void sort(int[] data) { Sggl*V/q
sort(data, IMPROVED_QUICK); .v-2A);I
} ?y__ Vrw
private static String[] name={ tI5*0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Aj(y]p8
}; LBmXy8'T`
fPstSez
private static Sort[] impl=new Sort[]{ F!w|5,)
new InsertSort(), d= ?lPEzSA
new BubbleSort(), Z?WVSJUVf
new SelectionSort(), s(e1kk}"
new ShellSort(), irP*:QM
new QuickSort(), `?f<hIJoz
new ImprovedQuickSort(), nB]mj_)R^
new MergeSort(), 1&vR7z]*
new ImprovedMergeSort(), `wr*@/P
new HeapSort() Ocn@JOg
}; qEVpkvEq
P+C5 s
public static String toString(int algorithm){ Zv*uUe
return name[algorithm-1]; AYfe_Dj
} (:h&c6'S)b
=W>a~e]/
public static void sort(int[] data, int algorithm) { <fA}_BH%]
impl[algorithm-1].sort(data); ltMcEv-d0
} = uepg@J
RD;A
public static interface Sort { O^ 5C
public void sort(int[] data); ;jO+<~YP!
} hh2&FI
]z| 2
public static void swap(int[] data, int i, int j) { J6ed
int temp = data; t<RPDQ>
data = data[j]; 4W<[& )7
data[j] = temp; 7#X`D
} [Z&<# -
} Zq H-]?)