[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; Q9K Gf;
} R.A}tV=j#
int i1=l; 6BW-AZc
int i2=mid+1; |F<U;xV$p
for(int cur=l;cur<=r;cur++){ }n=Tw92g
if(i1==mid+1) .)|jBC8|}
data[cur]=temp[i2++]; [HF)d#A
else if(i2>r) $>/J8iB
data[cur]=temp[i1++]; y>2v 9;Qp
else if(temp[i1] data[cur]=temp[i1++]; %'\D_W&
else pSQ3SM
data[cur]=temp[i2++]; wX#\\Jgi
} U,iTURd
} #`z!f0 P
oLruYSaD
} dp)lHBV
)~d2`1zGS
改进后的归并排序: ^!{oyw
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package org.rut.util.algorithm.support; $0LlaN@e
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import org.rut.util.algorithm.SortUtil; wgLS9.
LU?#{dZ
/** CvQ LF9|
* @author treeroot HLYM(Pz
* @since 2006-2-2 =Z#tZ{"
* @version 1.0 A6iyJFmD
*/ i=o>Bl@f
public class ImprovedMergeSort implements SortUtil.Sort { -rH4/Iby
<py~(q
private static final int THRESHOLD = 10; 2yq.<Wz<
ui9gt"qS`
/* +6gS]
* (non-Javadoc) b@1QE
* 7azxqa5:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2#/ KS^
*/ MLBZmM '
public void sort(int[] data) { uO[4 WZ
int[] temp=new int[data.length]; ]qVJ>
mergeSort(data,temp,0,data.length-1); ,z%F="@b9
} Crpkq/M
Om}&`AP};
private void mergeSort(int[] data, int[] temp, int l, int r) { 7Fy^K;V"
int i, j, k; D>G&aQ
int mid = (l + r) / 2; _rs#h)
if (l == r) TlBLG.-^
return; /cI]Z^&
if ((mid - l) >= THRESHOLD) k[vn:
mergeSort(data, temp, l, mid); vZ]gb$
else {B\.8)&8
insertSort(data, l, mid - l + 1); &-cI|
if ((r - mid) > THRESHOLD) MIR17%G
mergeSort(data, temp, mid + 1, r); Q&QR{?PMD
else 7/*;rT
insertSort(data, mid + 1, r - mid); oAvJ"JH@i
oR-_=U^
for (i = l; i <= mid; i++) { t9K.Jc0
temp = data; zv0RrF^
} 2tWUBt\,g
for (j = 1; j <= r - mid; j++) { (O`=$e
temp[r - j + 1] = data[j + mid]; +IS$Un
} r<|\4zIo/
int a = temp[l]; >F-J}P
int b = temp[r]; ._FgQ``PL
for (i = l, j = r, k = l; k <= r; k++) { v(: VUo]H
if (a < b) { Zfb:>J@h6
data[k] = temp[i++]; (n`\b47
a = temp; qtgK}*9ptv
} else { %mcuYR'D}
data[k] = temp[j--]; G^2"\4R]p
b = temp[j]; zG@!(
} G&uj}rj
} PTePSj1N
} *=2jteG=3.
ZVGw@3
/** $%t{O[(
* @param data fi?[ e?|c@
* @param l %pwm34
* @param i MfL q h
*/ ^k)f oD
private void insertSort(int[] data, int start, int len) { kW,yZ.?f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T|{BT! W1E
} |f>y"T+1
} (g4g-"rc
} !Uj !Oy
} ^mz_T+UOe
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堆排序： %^5$=w
(K?[gI
package org.rut.util.algorithm.support; hh8UKEM-
17 j7j@s)
import org.rut.util.algorithm.SortUtil; ]&r/H17
N{q'wep
/** r+lY9l
* @author treeroot Y]Fq)-
* @since 2006-2-2 !^m5by
* @version 1.0 _nRshTt`V&
*/ M"_XaVl
public class HeapSort implements SortUtil.Sort{ T\WNT#My
}pTj8Tr
/* (non-Javadoc) Fza)dJ7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _ssHRbE
*/ >`NM?KP s
public void sort(int[] data) { 4u(}eE f7
MaxHeap h=new MaxHeap(); ebao7r5@
h.init(data); 4p-$5Fk8}
for(int i=0;i h.remove(); -p;oe}|
System.arraycopy(h.queue,1,data,0,data.length); X,q=JS
} pGcc6q1
{jc~s~<#
private static class MaxHeap{ q2f/#"k
q%y_<Fw#E
void init(int[] data){ sZbzY^P
this.queue=new int[data.length+1]; O%)9tFT
for(int i=0;i queue[++size]=data; MkYem6
fixUp(size); z44uhRh
} 21WqLgT3 4
} z`Q5J9_<cV
$}F]pa[
private int size=0; g9 yCd(2<5
^Qr P.l#pZ
private int[] queue; n$Pv2qw
lLJb3[ e.
public int get() { Pw7'6W1
return queue[1]; YVaQ3o|!
} &t8_J3?Z
05zHLj
public void remove() { ~XxD[T5
SortUtil.swap(queue,1,size--); C=m Y
fixDown(1); vV'^HD^v
} iwVra"y
file://fixdown K;97/"
private void fixDown(int k) { Xo*$|9[.
int j; R5i8cjKZ?w
while ((j = k << 1) <= size) { dyp]y$
if (j < size %26amp;%26amp; queue[j] j++; q+:(@w6
if (queue[k]>queue[j]) file://不用交换 feopO j6~+
break; ]_=HC5"
SortUtil.swap(queue,j,k); 8qc%{8
k = j; (o:CxhV
} ^GAdl}
} oy`m:Xp
private void fixUp(int k) { g:6yvEu$ -
while (k > 1) { A8RT3OiXA
int j = k >> 1; (gf\VYM-7
if (queue[j]>queue[k]) FEZ6X
break; KGWENX_U
SortUtil.swap(queue,j,k); q%'ovX(dm
k = j; B~aOs>1 S]
} \I'Zc]
} `kv$B3
%zD-gw>
} UxvsSHi
b(yO
} KALg6DZe:
p%ZiTrA1&D
SortUtil： pd;-z
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package org.rut.util.algorithm; a"DV`jn
Q)@1:(V/
import org.rut.util.algorithm.support.BubbleSort; %~;Q_#CR/K
import org.rut.util.algorithm.support.HeapSort; ^hHeH:@
import org.rut.util.algorithm.support.ImprovedMergeSort; {UmCn>c
import org.rut.util.algorithm.support.ImprovedQuickSort; (p?3#|^
import org.rut.util.algorithm.support.InsertSort; z\h+6FCD
import org.rut.util.algorithm.support.MergeSort; oto od
import org.rut.util.algorithm.support.QuickSort; 7 b.-&,
import org.rut.util.algorithm.support.SelectionSort; 0C p}
import org.rut.util.algorithm.support.ShellSort; i]-gO
F^NR qE
/** +{%4&T<nHw
* @author treeroot 55cldo
* @since 2006-2-2 ]6;AK\9TM
* @version 1.0 7, 13g)
*/ 9HE(*S
public class SortUtil { G}-.xj]
public final static int INSERT = 1; ?|7+cz$g
public final static int BUBBLE = 2; D{4hNO
public final static int SELECTION = 3; Uaj=}p\+.p
public final static int SHELL = 4; Ntnmd
public final static int QUICK = 5; 4QN;o%,
public final static int IMPROVED_QUICK = 6; b:QFD|
public final static int MERGE = 7; 0;h1LI)
public final static int IMPROVED_MERGE = 8; 3uw7 J5x
public final static int HEAP = 9; /hM>dkwu
yKB[HpU-
public static void sort(int[] data) { `I>K?
sort(data, IMPROVED_QUICK); xI: 'Hk1
} +.lWck
private static String[] name={ ;a3nH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,4Fqvg
}; pG( knu
y9L#@
private static Sort[] impl=new Sort[]{ ye|a#a9N
new InsertSort(), oyt//SE
new BubbleSort(), {~^)-^Wt:
new SelectionSort(), G; [AQ:Iy
new ShellSort(), JZ%F
new QuickSort(), $vLV< y07
new ImprovedQuickSort(), ,/:a77
new MergeSort(), &7T H V
new ImprovedMergeSort(), P082.:q"
new HeapSort() 2E2}|: ||&
}; rH9}nL
<s>/< kW:
public static String toString(int algorithm){ [/Z'OV"tU
return name[algorithm-1]; `,Nn4
} kxW>Da<6
!"J#,e|
public static void sort(int[] data, int algorithm) { p}A4K#G
impl[algorithm-1].sort(data); dT)KvqX
} 8>{W:?I
H 1D;:n
public static interface Sort { b'1d<sD
public void sort(int[] data); ,imvA5
} n+qVT4o
&fSc{/
public static void swap(int[] data, int i, int j) { E)O|16f|>
int temp = data; K)`:v|d
data = data[j]; 1 j12Qn@]
data[j] = temp; bez'[Y{
} R5eB,FN
} -t6R!ZI