[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; n>Y3hY
} z:^Kr"=n
int i1=l; &O#a==F!(
int i2=mid+1; K?BWl:^x
for(int cur=l;cur<=r;cur++){ V,<,;d fR
if(i1==mid+1) }H?8~S=
data[cur]=temp[i2++]; =w?-R\
else if(i2>r) k)'hNk"x
data[cur]=temp[i1++]; Ig'Y]%Z0
else if(temp[i1] data[cur]=temp[i1++]; iVd*62$@$
else ?|%^'(U}
data[cur]=temp[i2++]; 82~UI'f \
} N;F1Z-9
} <.HHV91
j$Vv'on
} \_!FOUPz(
K-)*S\<}
改进后的归并排序: +N5G4t#.
YdV5\!
package org.rut.util.algorithm.support; r4gkSwy
$9y]>R
import org.rut.util.algorithm.SortUtil; DHbLS3-
@?aNvWeavH
/** en=Z[ZIPO
* @author treeroot "]LNw=S
* @since 2006-2-2 ba%[!
* @version 1.0 V{HZ/p_Y
*/ ~1S7\e7{
public class ImprovedMergeSort implements SortUtil.Sort { ?p. dc~tZ
3SpDV'}
private static final int THRESHOLD = 10; $sU?VA'h
O!d^v9hM,
/* ]b'K BAMy
* (non-Javadoc) 'M_8U0k
* $P^=QN5Bb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 69cOdIt^D
*/ Y5-X)f
public void sort(int[] data) { 1|;WaO1Q
int[] temp=new int[data.length]; K>RL
mergeSort(data,temp,0,data.length-1); 6aM`qz)
} z Rz#0
XC?H
private void mergeSort(int[] data, int[] temp, int l, int r) { %saTyF,
int i, j, k; `vDg~o
int mid = (l + r) / 2; ,T|iA/c
if (l == r) ;1NZY.pyc
return; }C/}8<
if ((mid - l) >= THRESHOLD) ,$}P<WZMu
mergeSort(data, temp, l, mid); oMLpl3pl
else csRba;Z[
insertSort(data, l, mid - l + 1); SQvicZAN)`
if ((r - mid) > THRESHOLD) 5irewh'R
mergeSort(data, temp, mid + 1, r); To}L%)
else j+_g37$:
insertSort(data, mid + 1, r - mid); I4m)5G?O2
] X%bU*4
for (i = l; i <= mid; i++) { ;y=w :r\A
temp = data; Y91TF'
} VY=~cVkzS
for (j = 1; j <= r - mid; j++) { E4}MvV=
temp[r - j + 1] = data[j + mid]; xdYjl.f
} /W:}p(>4a
int a = temp[l]; x[WT)
int b = temp[r]; L nw+o}
for (i = l, j = r, k = l; k <= r; k++) { Z'S>i*Ts
if (a < b) { - CM;sXq
data[k] = temp[i++]; }9Y='+.%^
a = temp; z]Ql/AK
} else { dMRwQejY{7
data[k] = temp[j--]; GZI[qKDfB
b = temp[j]; i;6\tK"!
} fkRb;aIl
} t,k9:p
} q?}G?n4
Rv.W~FE^
/** MAJvjgd..
* @param data '?yZ,t
* @param l jG)>{D
* @param i G<Lm}
*/ "q#(}1Zd
private void insertSort(int[] data, int start, int len) { t:m t9}$d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cTRCQ+W6:
} KO{}+~,.6
} w\$b(HC
} hzKfYJcQ|
} QfcW
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堆排序： QXXcJc~
7yQ r
package org.rut.util.algorithm.support; y)s/\l&
Ls|;gewp
import org.rut.util.algorithm.SortUtil; Xk7zXah
Aqp3amW!
/** xl# j_d,
* @author treeroot )}?dYk
* @since 2006-2-2 >!bYuVHA
* @version 1.0 uVp R^
*/ f3v/Y5)
public class HeapSort implements SortUtil.Sort{ UAcABL^2
ceZt%3=5
/* (non-Javadoc) Dtr'X@U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SxOM@A
*/ }jIb ^|#CD
public void sort(int[] data) { RKjA`cJ
MaxHeap h=new MaxHeap(); |/p^e
h.init(data); !knYD}Rxd
for(int i=0;i h.remove(); Q{$2D&
System.arraycopy(h.queue,1,data,0,data.length); J+.t\R
} sM?DNE^BvW
m m`:ci
private static class MaxHeap{ ipU"|{NK
%mI`mpf
void init(int[] data){ g|nPr)<
this.queue=new int[data.length+1]; :;7qup
for(int i=0;i queue[++size]=data; &JF^a
fixUp(size); ):.]4n{L
} 34P?nW(
} ?cpID8Z
ryPz?Aw(4
private int size=0; cFH,fj
Z/_RQ q
private int[] queue; re^1fv
Ex<-<tY
public int get() { lI&0 V5
return queue[1]; xvrCm`3n@
} 5gEUE{S
u}ab[$Q5
public void remove() { -M/ny-;`}
SortUtil.swap(queue,1,size--); Y@L`XNl
fixDown(1); xpSMbX{e
} cFuvi^n\
file://fixdown Hi|Oeu
private void fixDown(int k) { Z7%>O:@z
int j; Y> 7/>x6
while ((j = k << 1) <= size) { f+F /`P%
if (j < size %26amp;%26amp; queue[j] j++; yfaXScbE
if (queue[k]>queue[j]) file://不用交换 KU$.m3A>
break; O(!wDnhc
SortUtil.swap(queue,j,k); YZmD:P
k = j; 3RGVH,
} ))k^7g9M`
} 4}=]QQoE
private void fixUp(int k) { kOkgsQQ
while (k > 1) { 1Z*-@%RX
int j = k >> 1; B8C"i%8V)
if (queue[j]>queue[k]) `cf&4Hn
break; *S<>_R 8
SortUtil.swap(queue,j,k); am@\$Sa4
k = j; l tQ:c
} 9C`Fd S
} w3B*%x)
'n.ATV,
} F"9qBl~
YSeXCJ:Iy
} ~KrzJp=5F
KcY 2lTvx
SortUtil： 4Tq%V|5"&
r@iGMJx$
package org.rut.util.algorithm; {?#g*QF|^
9jJ&QACn
import org.rut.util.algorithm.support.BubbleSort; JYKaF6bx8
import org.rut.util.algorithm.support.HeapSort; }CQGvH
import org.rut.util.algorithm.support.ImprovedMergeSort; 2j(w*k q~
import org.rut.util.algorithm.support.ImprovedQuickSort; 0M:.Jhp
import org.rut.util.algorithm.support.InsertSort; _DH,$evS%
import org.rut.util.algorithm.support.MergeSort; *I>1O*
import org.rut.util.algorithm.support.QuickSort; t;ggc{
import org.rut.util.algorithm.support.SelectionSort; `MEH/
import org.rut.util.algorithm.support.ShellSort; 1p`XK";g
']4sx_)S
/** Xc`'i@FX
* @author treeroot ,AACE7%l
* @since 2006-2-2 }vp\lKP
* @version 1.0 Qm ;ip E
*/ m#DC;(Pn
public class SortUtil { ?hsOhUs(5
public final static int INSERT = 1; UB(Q &U_
public final static int BUBBLE = 2; -/KVZ
public final static int SELECTION = 3; }1Q]C"hY
public final static int SHELL = 4; fWF\V[
public final static int QUICK = 5; 4,TS1H
public final static int IMPROVED_QUICK = 6; *H:;pIWP
public final static int MERGE = 7; l}Jf;C*j1z
public final static int IMPROVED_MERGE = 8; E^Q|v45d
public final static int HEAP = 9; >qCUs3}C{*
Exk[;lI
public static void sort(int[] data) { )2u=U9
sort(data, IMPROVED_QUICK); c7P"1
} [ @&
private static String[] name={ !</5 )B`5:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VA.:'yQtJ
}; :] {+3A
?$ o9/9w
private static Sort[] impl=new Sort[]{ !:a pu!
new InsertSort(), xHe<TwkI
new BubbleSort(), (&+ ~hW5d
new SelectionSort(), l9?]t;
new ShellSort(), w6v P a
new QuickSort(), cm]8m_!
new ImprovedQuickSort(), v-_K'm
new MergeSort(), 8H3|^J
new ImprovedMergeSort(), mgh,)=2cE(
new HeapSort() jsfyNl?6
}; q-X)tH_+w@
@kRe0:t
public static String toString(int algorithm){ 8%> Ls
return name[algorithm-1]; 4E&URl0Bh
} E(>RmPP=7
L:%; Fx2
public static void sort(int[] data, int algorithm) { ~'=s?\I
impl[algorithm-1].sort(data); TZ?va@2
} v8Bi1,g
2*F["E
public static interface Sort { 8yA:C
public void sort(int[] data); thl{IU
} c7L#f=Ot?
<s)+V6\E
public static void swap(int[] data, int i, int j) { %AXa(C\1
int temp = data; WDWb7
data = data[j]; xaAJ>0IM
data[j] = temp; G!L=W#{
} p p9Gzn C
} #4Xe zj,g*