[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; ?azLaAG
} RJd*(!y
int i1=l; 5-k gGOt
int i2=mid+1; _ W#Km
for(int cur=l;cur<=r;cur++){ &iq'V*+-\
if(i1==mid+1) WA1yA*S
data[cur]=temp[i2++]; \ZhkOl
else if(i2>r) $Q}L*4?]
data[cur]=temp[i1++]; p,|)qr:M
else if(temp[i1] data[cur]=temp[i1++]; 5D?{dA:Rq
else 0bJT0_
data[cur]=temp[i2++]; $bF+J8%D
} c+7I
} | 2<zYY
WBJn1
} #*lDKn[vO
q[W@.[2y)
改进后的归并排序: uHbbPtk
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package org.rut.util.algorithm.support; 8 $H\b &u
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import org.rut.util.algorithm.SortUtil; Pg`+Q^^6S
UM`$aPz
/** s?;V!t
* @author treeroot '/Vm[L$d
* @since 2006-2-2 ;"e55|d9I
* @version 1.0 b"}ya/
*/ O'^AbO=,
public class ImprovedMergeSort implements SortUtil.Sort { {M=B5-
59:kL<;S-
private static final int THRESHOLD = 10; "R-j
oRcP4k;d=
/* n ~&ssFC
* (non-Javadoc) wv\"(e7(
* qK@,O\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y?3u6q++
*/ `('Up?
public void sort(int[] data) { EG &me
int[] temp=new int[data.length]; W>?aZv
mergeSort(data,temp,0,data.length-1); mr_NArF
} "Wk K1u
E5|GP
private void mergeSort(int[] data, int[] temp, int l, int r) { 0$Zh4Y
int i, j, k; FEopNDy@y
int mid = (l + r) / 2; NU{eoqaT
if (l == r) 0pB'^Q{
return; : 4lR`%
if ((mid - l) >= THRESHOLD) 3BLHd<
mergeSort(data, temp, l, mid); t4~?m{
else 2v4&'C
insertSort(data, l, mid - l + 1); 5^l-3s?M
if ((r - mid) > THRESHOLD) 2\O!vp>|-
mergeSort(data, temp, mid + 1, r); VC Ay~,
else dvY3=~'
insertSort(data, mid + 1, r - mid); sT<h+[2d
|pU>^
for (i = l; i <= mid; i++) { p&`I#6{
temp = data; /Jc^XWf
} B=X_c5
for (j = 1; j <= r - mid; j++) { l+`CgYo
temp[r - j + 1] = data[j + mid]; %4#ChlXB
} IsFL"Vx
int a = temp[l]; ww%4MHPp8
int b = temp[r]; QZO<'q`L
for (i = l, j = r, k = l; k <= r; k++) { +:c}LCI9<
if (a < b) { yd45y}uS;F
data[k] = temp[i++]; U}=H1f,
a = temp; %\B?X;(
} else { $SniQ
data[k] = temp[j--]; @}+B%R
b = temp[j]; RJN LcIm
} o@} qPvt0
} HC>k/Gk"
} 4`r-*Lx
ashVV~\8A
/** 91T[@p
* @param data eD^(*a>(
* @param l {@-tRm&
* @param i IWhe N
*/ ms+gq
private void insertSort(int[] data, int start, int len) { -*?{/QmKb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :4"b(L
} M[R'
} 1JI7P?\B
} WS@8Z0@RD
} Dl}va
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堆排序： IZ.b
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package org.rut.util.algorithm.support; IUh)g1u41O
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import org.rut.util.algorithm.SortUtil; Ye>+
)$2h:dw_
/** g%4=T~
* @author treeroot 4%TmW/yd
* @since 2006-2-2 2qKAO/_O
* @version 1.0 G#'G9/Tm
*/ *vzj(HGO
public class HeapSort implements SortUtil.Sort{ k.H4Mf(4
C\cZ
/* (non-Javadoc) zfGr1;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a-5#8
*/ gkx<<)y l
public void sort(int[] data) { -N2m|%B
MaxHeap h=new MaxHeap(); -PiZvge
h.init(data); ZQ#AEVI,
for(int i=0;i h.remove(); w/CD-
System.arraycopy(h.queue,1,data,0,data.length); 9v}vCg
} fEyc3K'5V
h&bs`
private static class MaxHeap{ ^"$~&\+x5
Psjk 7\
void init(int[] data){ tZD^<Q7}\
this.queue=new int[data.length+1]; Lez]{%+.`[
for(int i=0;i queue[++size]=data; KVpQ,x&q~
fixUp(size); 8RVeKnpXTV
} l-[5Zl;"
} @#5?tk0
(G{2ec:?
private int size=0; ~$4!C'0
v%Su#xq/
private int[] queue; NbhQ-
6uWPIM;
public int get() { #j"N5e}U
return queue[1]; gAy"W$F
} `%0k\,}V
8uetv
public void remove() { ,aSK L1
SortUtil.swap(queue,1,size--); sRGIHT#
fixDown(1); V"sm+0J
} 5U JMiwP{
file://fixdown <d3N2
private void fixDown(int k) { (_~Dyvo
int j; "eKM<S
while ((j = k << 1) <= size) { BH?fFe&J:`
if (j < size %26amp;%26amp; queue[j] j++; K%>3ev=y.s
if (queue[k]>queue[j]) file://不用交换 1f5;^T I
break; th|TwD&mO
SortUtil.swap(queue,j,k); Cqw`K P
k = j; J`A )WsKkb
} xgB-m[Xi
} 'C1yqkIa`
private void fixUp(int k) { xO'xZ%cUI
while (k > 1) { j|(bdTZY:
int j = k >> 1; `[.4SIah
if (queue[j]>queue[k]) o}lA\A
break; Ns`:=
SortUtil.swap(queue,j,k); yvKKE
k = j; 1|#j/
} KHt#mQy)9
} NE!]
Tn\59 (
} --|L?-2k,
u]QG^1.qYe
} JztSP?
o7s<G8;?
SortUtil： UL\gcZ Zkl
Vb8{OD3PK
package org.rut.util.algorithm; :.NCS`z_
hc5iIJ]
import org.rut.util.algorithm.support.BubbleSort; AU H_~SY
import org.rut.util.algorithm.support.HeapSort; ln=:E$jX
import org.rut.util.algorithm.support.ImprovedMergeSort; YU%U
import org.rut.util.algorithm.support.ImprovedQuickSort; L)/^%/!
import org.rut.util.algorithm.support.InsertSort; ]Saw}agE[%
import org.rut.util.algorithm.support.MergeSort; [%BWCd8Q~P
import org.rut.util.algorithm.support.QuickSort; P}bwEj
import org.rut.util.algorithm.support.SelectionSort; FKu^{'Y6E0
import org.rut.util.algorithm.support.ShellSort; /hbdQm
Ng<oz*>U
/** H}&4#CQ'!
* @author treeroot 6ALUd^
* @since 2006-2-2 AG<TY<nqL
* @version 1.0 W!WeYV}kb
*/ 1jQlwT(:
public class SortUtil { eWAgYe2
public final static int INSERT = 1; BZWGXzOFh
public final static int BUBBLE = 2; W2j@Q=YDS
public final static int SELECTION = 3; C*,PH!$k
public final static int SHELL = 4; _8nT$!\\
public final static int QUICK = 5; +h?z7ZY^
public final static int IMPROVED_QUICK = 6; _f~m&="T!
public final static int MERGE = 7; 3D"?|rd~
public final static int IMPROVED_MERGE = 8; Fo[=Dh*AqU
public final static int HEAP = 9; !3Me 6&$O
8qQrJFm|3*
public static void sort(int[] data) { a$P$Ngi?S
sort(data, IMPROVED_QUICK); |+(Hia,X
} ^B7C8YP
private static String[] name={ @c#M^:9Dc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \KPwh]0
}; )Aa h
n!t][d/g+
private static Sort[] impl=new Sort[]{ LuW^Ga"E
new InsertSort(), ,Taq~
new BubbleSort(), ?{*/VJl$
new SelectionSort(), .LHzaeJCX
new ShellSort(), Y]Y]"y$1
new QuickSort(), rpO>l
new ImprovedQuickSort(), piKR*|F
new MergeSort(), jneos~ 'n8
new ImprovedMergeSort(), #R$[?fW
new HeapSort() e.ksN
}; 8ORr
5Dlx]_
public static String toString(int algorithm){ aXO|%qX
return name[algorithm-1]; /0I=?+QSo
} ~`Xu6+1o
xKC{P{:
public static void sort(int[] data, int algorithm) { (qXl=e8
impl[algorithm-1].sort(data); &C7HG^;W9
} b9@VD)J0E
\H5{[ZUn
public static interface Sort { p?zh4:\F+
public void sort(int[] data); C1KO]e>
} -$m?ShDd
^L;k
public static void swap(int[] data, int i, int j) { Q.Ljz Z
int temp = data; j>t*k!db
data = data[j]; -S%)2(f^
data[j] = temp; *<nfA}
} v\?J$Hdd
} Ffp<|2T2_