[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; S>r}3,]S
} ju3@F8AI
int i1=l; }h1LH4
int i2=mid+1; Ly3!0P.<
for(int cur=l;cur<=r;cur++){ F_g(}wE# q
if(i1==mid+1) bCr W'}:de
data[cur]=temp[i2++]; 2wnk~URj
else if(i2>r) $y,KDR7^
data[cur]=temp[i1++]; -s!J3DB
else if(temp[i1] data[cur]=temp[i1++]; J%|;
else AZE%fOG<i
data[cur]=temp[i2++]; 04&S.#+(
} XR9kxTuk
} 38m9t'
R.2i%cU
} 0TA8#c
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改进后的归并排序: Te~jYkCd
u{&=$[;
package org.rut.util.algorithm.support; d*e8P ep
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import org.rut.util.algorithm.SortUtil; Gey-8
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/** -zMvpe-am&
* @author treeroot 88X]Uw(+
* @since 2006-2-2 XUh&an$
* @version 1.0 xu"-Uj1
*/ 2]Cn<zJ
public class ImprovedMergeSort implements SortUtil.Sort { dc4XX5Z
K$D+TI)
private static final int THRESHOLD = 10; ~,};FI
f. >[ J
/* Yc-5Mr8*,
* (non-Javadoc) @ N'P?i
* A{B$$7%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )'g4Ty
*/ c)N_"#&
public void sort(int[] data) { i( +Uvtgs
int[] temp=new int[data.length]; +}(]7du
mergeSort(data,temp,0,data.length-1); }id)~h_@
} tC$+;_=+F
.,(x7?
private void mergeSort(int[] data, int[] temp, int l, int r) { {yT<22Fl
int i, j, k; *gGw/jA/
int mid = (l + r) / 2; yB*aG
if (l == r) G@~e:v)
return; k5bv57@
if ((mid - l) >= THRESHOLD) AVU'rsXA
mergeSort(data, temp, l, mid); [:e>FXV
else ? N]bFW"t|
insertSort(data, l, mid - l + 1); Ktzn)7-
if ((r - mid) > THRESHOLD) &1=,?s]&
mergeSort(data, temp, mid + 1, r); SI%J+Y7
else ,g?M[(wtc
insertSort(data, mid + 1, r - mid); V_v+ic^
F$JA IL{W
for (i = l; i <= mid; i++) { I 6<LKI/
temp = data; cMy?&
} m|+zMf&
for (j = 1; j <= r - mid; j++) { Ebi~gGo
temp[r - j + 1] = data[j + mid]; rc%*g3ryLG
} ?H!&4o
int a = temp[l]; !{uV-c-5,
int b = temp[r]; e1bV&
for (i = l, j = r, k = l; k <= r; k++) { >B;S;_5=
if (a < b) { R~TG5^(
data[k] = temp[i++]; V)`Q0}
a = temp; aOoWB^;6
} else { Pj8Vl)8~NV
data[k] = temp[j--]; [ CU8%%7
b = temp[j]; I]m&h!
} d]=>U^K
} T~}g{q,tR
} B]7QOf"
l$!NEOK
/** K~5(j{Kb8
* @param data -M[BC~!0;
* @param l 4HXNu,T'
* @param i c1f`?i}.
*/ )OGO wStz
private void insertSort(int[] data, int start, int len) { | 8n,|%e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0b,{4DOD
} aO\@5i_r
} \nVoBW(
} 1b!5h
} oX/#Mct{s
}T=\hM
堆排序： =&U7:u
R*O6Z"h
package org.rut.util.algorithm.support; :Sk<0VVd7
bqR0./V
import org.rut.util.algorithm.SortUtil; rf&nTDaWI
(W`=`]!
/** <,T#* fg
* @author treeroot (]<G)+*
* @since 2006-2-2 nQ'AB~ Do
* @version 1.0 n] n3/wpO
*/ $4TawFf"nc
public class HeapSort implements SortUtil.Sort{ RveMz$Yy
Zxv{qbF
/* (non-Javadoc) ;|K(6)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fbW#6:Y
*/ s0'Xihsw6
public void sort(int[] data) { |fm"{$u
MaxHeap h=new MaxHeap(); AyZBH&}RZ
h.init(data); af7\2g3*
for(int i=0;i h.remove(); /E6Tt
System.arraycopy(h.queue,1,data,0,data.length); r|7hm:F)
} noNL.%I
YPav5<{a
private static class MaxHeap{ j6$_U@)%O
BhJ~jV"
void init(int[] data){ (z<&PP
this.queue=new int[data.length+1]; [PW*|U
for(int i=0;i queue[++size]=data; l.i&.;f
fixUp(size); c7N`W}BZ
} +2]{%=
} 3&JsYQu
Nb;Yti@Y.
private int size=0; |"a%S,I'
^?tF'l`
private int[] queue; F D6>[W
m)?cXM
public int get() { wXsA-H/`
return queue[1]; P/FO,S-V
} *tT}y(M
I6FglVQ6
public void remove() { 8aD4wc
SortUtil.swap(queue,1,size--); Jk7[}Jc$
fixDown(1); GVp2|\-L
} Ye_)~,{,p
file://fixdown X"{s"Mc0G
private void fixDown(int k) { S\jN:o#b
int j; 2$? )VXtw
while ((j = k << 1) <= size) { Ip4SdbU
if (j < size %26amp;%26amp; queue[j] j++; BY$%gIB6>
if (queue[k]>queue[j]) file://不用交换 c;bp[Y3R
break; _dq.hW7
SortUtil.swap(queue,j,k); 3u8HF-
k = j; `riK[@
} #.%;U' #O
} 7@Qz
private void fixUp(int k) { 9oY%v7
while (k > 1) { ZuF-$]oL&
int j = k >> 1; cQUmcK/,
if (queue[j]>queue[k]) sEL[d2oO
break; 6?ylSQ]1
SortUtil.swap(queue,j,k); P$D1kcCw
k = j; W!z=AL{
} -q\1Tlc]3
} r>`65o
o%!a
} x5 3aGi|
#G^?4Za
} Pd\S{ Y~wk
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SortUtil： R b6`k^
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package org.rut.util.algorithm; 4S@^ym
y%\kgWV
import org.rut.util.algorithm.support.BubbleSort; 2rf-pdOvG
import org.rut.util.algorithm.support.HeapSort; !5Kv9P79
import org.rut.util.algorithm.support.ImprovedMergeSort; 50Co/-)j
import org.rut.util.algorithm.support.ImprovedQuickSort; x2[A(O=
import org.rut.util.algorithm.support.InsertSort; N'!a{rF
import org.rut.util.algorithm.support.MergeSort; hO@'WoniW
import org.rut.util.algorithm.support.QuickSort; <`b)56v:+
import org.rut.util.algorithm.support.SelectionSort; uG2Hzav
import org.rut.util.algorithm.support.ShellSort; S=ebht=
x(&o=Pu
/** r+;op_
* @author treeroot ; 7[5%xM
* @since 2006-2-2 X4lz?Y:*
* @version 1.0 NI\jGR.
*/ iXMs*GcK
public class SortUtil { [GX5jD#
public final static int INSERT = 1; _JiB=<Fkr
public final static int BUBBLE = 2; xf?*fm?m
public final static int SELECTION = 3; ,[%KSyH
public final static int SHELL = 4; J"L+`i
public final static int QUICK = 5; S.aSNH<
public final static int IMPROVED_QUICK = 6; AF>J8V
public final static int MERGE = 7; b'4{l[3~nl
public final static int IMPROVED_MERGE = 8; V.6h6B!vB
public final static int HEAP = 9; )Y+n4UL3NK
R~iJ5@[
public static void sort(int[] data) { G<l+94(
sort(data, IMPROVED_QUICK); r'#5ncB
} yf*^Y74
private static String[] name={ L]3 V)`}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +6-c<m|
}; x4Mq{MrWp
1WRQjT=o
private static Sort[] impl=new Sort[]{ R$IxR=hMx
new InsertSort(), w xKlBx7
new BubbleSort(), Pk!RgoWF
new SelectionSort(), 3,=97Si=
new ShellSort(), OaY.T
new QuickSort(), A}v!vVg
new ImprovedQuickSort(), V}o`9R@tx}
new MergeSort(), E*'sk
new ImprovedMergeSort(), SKt&]H
new HeapSort() ^pruQp1X
}; awkPFA*c'
FD:3;nUY7
public static String toString(int algorithm){ AI0YK"c?
return name[algorithm-1]; 7ESSx"^B
} lZ|+.T!g?
Oo^kV:.)
public static void sort(int[] data, int algorithm) { ^)oBa=jL4
impl[algorithm-1].sort(data); /.P9n9
} #@FMH*?xX6
yNCd} 4Ym5
public static interface Sort { /9T.]H~
public void sort(int[] data); L/\s~*:M
} 4eH:eCZze
g27 iE
public static void swap(int[] data, int i, int j) { qF'lh
int temp = data; 1T&NU
data = data[j]; {Tx"G9
data[j] = temp; K#Ia19au5
} O|%03q(
} b9nTg