[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; :M"+
} ({E,}x
int i1=l; u !BU^@P
int i2=mid+1; rCw4a?YS
for(int cur=l;cur<=r;cur++){ 6BV 6<PHJ
if(i1==mid+1) @7nZjrH
data[cur]=temp[i2++]; 6$b=Tr=0
else if(i2>r) ;U(]#pW!t
data[cur]=temp[i1++]; $4{sPHi)I
else if(temp[i1] data[cur]=temp[i1++]; m \)B=H!bz
else MN<LZC%$
data[cur]=temp[i2++]; eke[{%L
} oLoc jj~T
} @6"MhF
liS'
} 8!2)=8|f
sOLh'x f.
改进后的归并排序: 2_wpj;E
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package org.rut.util.algorithm.support; +Csb8
-PPwX~;!
import org.rut.util.algorithm.SortUtil; Z,)H f
+v B}E
/** 2'fd4rE5
* @author treeroot O!"K'Bm
* @since 2006-2-2 :tZsSK
* @version 1.0 dUv@u!}B
*/ wH|%3@eJ
public class ImprovedMergeSort implements SortUtil.Sort { $+WXM$N
X;!*D
private static final int THRESHOLD = 10; Dl/ C?Fll
D/E5&6
/* AOg'4
* (non-Javadoc) &| (K#|^@
* p6j-8ggL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;T^s&/>E
*/ ={BC0,
public void sort(int[] data) { i*|HN"!
int[] temp=new int[data.length]; @|:fm() <
mergeSort(data,temp,0,data.length-1); 8|Tqk,/pD
} :gsRJy1
WHC/'kvF
private void mergeSort(int[] data, int[] temp, int l, int r) { r-T1^u
int i, j, k; `<tRfl}qs
int mid = (l + r) / 2; fn<dr(Dx
if (l == r) JzEg`Sn^
return; E{V?[HcWq
if ((mid - l) >= THRESHOLD) :P-H8*n""
mergeSort(data, temp, l, mid); iFUiw&
else iM8Cw/DS
insertSort(data, l, mid - l + 1); V=ll 9M
if ((r - mid) > THRESHOLD) 9y7hJib
mergeSort(data, temp, mid + 1, r); w,IJ44f ^%
else --]blP7
insertSort(data, mid + 1, r - mid); P.YT/
5mAb9F8@
for (i = l; i <= mid; i++) { +k6` tl~*
temp = data; C O6}D
} 4S42h_9
for (j = 1; j <= r - mid; j++) { $'\kK,=
temp[r - j + 1] = data[j + mid]; 3rRIrrYO
} m@<,bZkl
int a = temp[l]; uRy}HLZ"
int b = temp[r]; Py*WHHO
for (i = l, j = r, k = l; k <= r; k++) { ,It0brF
if (a < b) { .M:&Aj)x16
data[k] = temp[i++]; (7X
a = temp; QI[WXxp
} else { uT]$R
data[k] = temp[j--]; c%5P|R~g]p
b = temp[j]; f_ MK4
} Ihf>FMl:
} ]ttF''lH
} vL_yM
! #Pn_e
/** Cj#wY
* @param data <J d!`$
* @param l jIaaNO)
* @param i /cClV"S*G
*/ T4W20dxL7
private void insertSort(int[] data, int start, int len) { 6OE xAn8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CY?J$sN
} EC\@$Fg
} $x}R2
} { 5r]G
} /'8%=$2Kw
/[ m7~B]QE
堆排序： qD%88c)g
n_{&dVE
package org.rut.util.algorithm.support; uyEk1)HC
QV."ZhL5=
import org.rut.util.algorithm.SortUtil; KF&8l/f
9(fh+
/** \r aP
* @author treeroot 8T"L'{ggWB
* @since 2006-2-2 G>pedE\
* @version 1.0 Vw;iE=L
*/ < R"Y^]P=
public class HeapSort implements SortUtil.Sort{ PoZ$3V$(Lz
^%*qe5J
/* (non-Javadoc) y a$yRsd`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yPfx!9B
*/ yuC"V'
public void sort(int[] data) { <nJGJ5JJ
MaxHeap h=new MaxHeap(); QH><! sa
h.init(data); VP< zOk7
for(int i=0;i h.remove(); 6MOwn*%5k
System.arraycopy(h.queue,1,data,0,data.length); 2L^/\!V#
} C2LG@iCIE
iOm&(2/
private static class MaxHeap{ 3T(ft^~
!_Y%+Rkp0
void init(int[] data){ &=t~_ Dc
this.queue=new int[data.length+1]; MZVbOcSAd
for(int i=0;i queue[++size]=data; bBINjs8C_
fixUp(size); ~~Cd9Hzi
} +Q"s!\5
} &K!0yR
.+2:~%v6
private int size=0; 4grV2xtX
3K(/=
private int[] queue; v$`3}<3-
[W$x5|Z}Q
public int get() { E_&;.hw
return queue[1]; ?p6@uM\Q7
} 8Ud.t=2
3q'nO-KJ
public void remove() { ral=`/p
SortUtil.swap(queue,1,size--); v+EJ $
fixDown(1); -DGuaUU
} gs}&a3d7k
file://fixdown ?b d&Av
private void fixDown(int k) { /slCK4vFc
int j; H^*[TX=#[
while ((j = k << 1) <= size) { CWZv/>,%
if (j < size %26amp;%26amp; queue[j] j++; Z3zD4-p$_
if (queue[k]>queue[j]) file://不用交换 !]"M]tyv\
break; ZLaht(`+
SortUtil.swap(queue,j,k); `?&C5*P
k = j; hJFxT8B/
} "pX|?ap
} Lniz>gSc
private void fixUp(int k) { W;Dik%^tg
while (k > 1) { 0XE6Hw
int j = k >> 1; JWu0VLo
if (queue[j]>queue[k]) 0(5qVJ12
break; 3#fg 2
SortUtil.swap(queue,j,k); b7'A5]X
k = j; cooicKS7
} *W=1yPP
} Qt"jU+Zoy
\Ogs]4
} E08!a
r 'ioH"=
} 1=_?Wg:
4J9Y
SortUtil： >]Mhkf/=)
Ye^#]%m
package org.rut.util.algorithm; Yh,,(V6
aEUEy:.
import org.rut.util.algorithm.support.BubbleSort; heES [
import org.rut.util.algorithm.support.HeapSort; =J-&usX
import org.rut.util.algorithm.support.ImprovedMergeSort; % T$!I(L&
import org.rut.util.algorithm.support.ImprovedQuickSort; *ax&}AHK[/
import org.rut.util.algorithm.support.InsertSort; }uD*\.
import org.rut.util.algorithm.support.MergeSort; ZDK+>^A)
import org.rut.util.algorithm.support.QuickSort; +IGSOWL
import org.rut.util.algorithm.support.SelectionSort; &mJm'Ks
import org.rut.util.algorithm.support.ShellSort; 1A]
c[6<UkH7
/** z/o&r`no
* @author treeroot 22d>\u+c
* @since 2006-2-2 Yg!fEopLb
* @version 1.0 GOCe&?
*/ k:U%#rb;
public class SortUtil { J"eE9FLM
public final static int INSERT = 1; RXO}mu]Iu
public final static int BUBBLE = 2; M&(0n?R"R
public final static int SELECTION = 3; 7 A{R0@
public final static int SHELL = 4; P`CQ)o
public final static int QUICK = 5; ]<iD'=a
public final static int IMPROVED_QUICK = 6; wVv@
public final static int MERGE = 7; R-Tf9?)
public final static int IMPROVED_MERGE = 8; 93)1
public final static int HEAP = 9; ~!fOl)F
skLr6Cs|
public static void sort(int[] data) { WD8F]+2O\
sort(data, IMPROVED_QUICK); jTsQsHq
} Urm(A9|N
private static String[] name={ RLVz"=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hs)_h^P
}; d~CZ9h
:Mu]*N
private static Sort[] impl=new Sort[]{ p?s[I)e
new InsertSort(), 7?Twhs.O
new BubbleSort(), GKXd"8z]
new SelectionSort(), wx/*un%2
new ShellSort(), aH$DEs
new QuickSort(), *]S&V'Di
new ImprovedQuickSort(), HvG~bZN
new MergeSort(), ,7Q b24A
new ImprovedMergeSort(), {tXyz[;i1}
new HeapSort() Wh?3vZ^
}; k _Bz@^J
2reQd47
public static String toString(int algorithm){ F^DDN7AKH
return name[algorithm-1]; k+u L^teyS
} (ap,3$hS
;:~-=\
public static void sort(int[] data, int algorithm) { l\bgp3.+
impl[algorithm-1].sort(data); CDFX>>N
} ;3O=lo:$~
^hwTnW9Z1:
public static interface Sort { ;`Wh^Qgi
public void sort(int[] data); %\!3tN
} 4:s!mHcz
.Nd_p{
public static void swap(int[] data, int i, int j) { $0~_)$i:
int temp = data; ^,fMs:
data = data[j]; u3vw[k
data[j] = temp; mm`yu$9gbP
} ESY\!X:|
} U'xmn$O