[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; ,;6%s>Cvd(
} fp||<B
int i1=l; 3wN4kltt
int i2=mid+1; CH+%q+I
for(int cur=l;cur<=r;cur++){ hak#Iz0[C
if(i1==mid+1) g{DOQA
data[cur]=temp[i2++]; =pe O%
else if(i2>r) 6iQqOAG
data[cur]=temp[i1++]; Yaq0mef0
else if(temp[i1] data[cur]=temp[i1++]; _x5-!gK
else 2^s&#@n3t
data[cur]=temp[i2++]; qbnlD\
} 2;]tItd1
} vasw@Uto)
toF6 Z
} 'NWvQR<X
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改进后的归并排序: =SJ[)|
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package org.rut.util.algorithm.support; ,=!s;+lu{
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import org.rut.util.algorithm.SortUtil; zX=%BL?
:8n?G
/** .aZB?MW
* @author treeroot y~_x
* @since 2006-2-2 Iy5W/QK6
* @version 1.0 ~i^,Z&X:
*/ J'cE@(US
public class ImprovedMergeSort implements SortUtil.Sort { a w~a/T:
M-Nn \h$,
private static final int THRESHOLD = 10; >VjtKSN
f].z.
/* PmId #2f
* (non-Javadoc) a[^dK-
* F`Vp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0wBr_b!
*/ ;Xidv9c
public void sort(int[] data) { d{!zJ+n
int[] temp=new int[data.length]; J!rZskd
mergeSort(data,temp,0,data.length-1); -'W:P'BG
} P)TeF1~T
~R|fdD/%
private void mergeSort(int[] data, int[] temp, int l, int r) { AF{o=@
int i, j, k; ,^xsdqpe
int mid = (l + r) / 2; P\c0Q;){h"
if (l == r) (I`<;
return; hy"p8j7_
if ((mid - l) >= THRESHOLD) x2i`$iNhmP
mergeSort(data, temp, l, mid); Fo"'[`
else 0A~f ^
insertSort(data, l, mid - l + 1); YS"76FJ
if ((r - mid) > THRESHOLD) /?j^Qu
mergeSort(data, temp, mid + 1, r); 8HO)",+I
else zJ0'KHF}o
insertSort(data, mid + 1, r - mid); 8/34{2048
nDC5/xB
for (i = l; i <= mid; i++) { qmnCa&C9
temp = data; S4O:?^28
} >|T?87
for (j = 1; j <= r - mid; j++) { =7P; /EV
temp[r - j + 1] = data[j + mid]; /=OSGIJzm
} b!37:V\#}
int a = temp[l]; X>jwjRK $
int b = temp[r]; q33!X!br
for (i = l, j = r, k = l; k <= r; k++) { 6a`_i
if (a < b) { kLY9#p=X
data[k] = temp[i++]; \t&6$"n(B6
a = temp; I|[aa$G
} else { ?yz}
data[k] = temp[j--]; NOmSLIgt7
b = temp[j]; j1toV$)P
} 1/qiE{NW
} [laX~(ND{
} .yj=*N.
48%a${Nvvj
/** Ah2XwFg?
* @param data @p2dXJeR<
* @param l =09j1:''<d
* @param i e;}5~dSi
*/ .Lu=16
private void insertSort(int[] data, int start, int len) { [76mgj!K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f{Y|FjPp=E
} cl7+DAE
} zck |jhJ6
} f<'&_*7,|t
} N<Q}4%^c
4_I,wG@
堆排序： VF==F_l
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package org.rut.util.algorithm.support; dl$l5z\
kAk,:a;P
import org.rut.util.algorithm.SortUtil; GrQAho
<db/. A3
/** t_VHw'~"
* @author treeroot 2Nl("e^kJr
* @since 2006-2-2 yb**|[By
* @version 1.0 3x9C]
*/ TuCOoz@d
public class HeapSort implements SortUtil.Sort{ R;V(D3
5BCaE)J
/* (non-Javadoc) 'Jl.fN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s3kEux^
*/ gZ!(&u
public void sort(int[] data) { LA@}{hU
MaxHeap h=new MaxHeap(); x}>tX
h.init(data); 8"*$e I5
for(int i=0;i h.remove(); K :q-[\G
System.arraycopy(h.queue,1,data,0,data.length); S@"=,Xj M
} K;xW/7?
sBu"$"]
private static class MaxHeap{ hA\8&pI;
yRi/YR#
void init(int[] data){ # nYGKZ
this.queue=new int[data.length+1]; YV940A-n
for(int i=0;i queue[++size]=data; K+$c,1wb
fixUp(size); {4m"S7O
} a&ByV!%%+_
} 2nieI*[
fY"28#
private int size=0; EhUy7b,1_
RK3/!C`
private int[] queue; X5/{Mx`8Oz
coFg69\^
public int get() { O`0$pn
return queue[1]; x[^A9
} r;T/
QF;<%QF:
public void remove() { /[IQ:':^
SortUtil.swap(queue,1,size--); l{a&Zy)
fixDown(1); \mu9ikZ<
} ,]{NZ9
file://fixdown EXFxiw
private void fixDown(int k) { rYS D-Kq
int j; *f#4S_ws`
while ((j = k << 1) <= size) { "AK3t' jF*
if (j < size %26amp;%26amp; queue[j] j++; jrl6):x
if (queue[k]>queue[j]) file://不用交换 |O9=C`G_
break; O({_x@
SortUtil.swap(queue,j,k); jgo@~,5R
k = j; #rr-4$w+
} `pMI[pLZe
} 2*L/c-
private void fixUp(int k) { fBOPd=
while (k > 1) { ge oN4
int j = k >> 1; 6qJB"_.
if (queue[j]>queue[k]) 66Xt=US
break; |\(/dXXP
SortUtil.swap(queue,j,k); %UJ4wm
k = j; )x7hhEk=^
} *vO'Z &
} oX4uRc7wR
GKtQ>39B
} 5#o,]tP
(*x"6)`
} k0IU~y%
`~]ReJ!X%
SortUtil： fx-*')
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package org.rut.util.algorithm; /nP=E
6;pREM+
import org.rut.util.algorithm.support.BubbleSort; v+sbRuo8
import org.rut.util.algorithm.support.HeapSort; iP%=Wo.
import org.rut.util.algorithm.support.ImprovedMergeSort; )\;r V';
import org.rut.util.algorithm.support.ImprovedQuickSort; [E~TYk;
import org.rut.util.algorithm.support.InsertSort; E}=,"i
import org.rut.util.algorithm.support.MergeSort; 8vw]u_e
import org.rut.util.algorithm.support.QuickSort; Xt84Evo
import org.rut.util.algorithm.support.SelectionSort; 4"{wga~%/
import org.rut.util.algorithm.support.ShellSort; .Cus t
\8D~,$,``|
/** X8x>oV;8
* @author treeroot 7$=@q|$
* @since 2006-2-2 +3>4 ?,^g
* @version 1.0 xH[yIfHkG@
*/ fdG.=7`
public class SortUtil { 6I#DlAU@v
public final static int INSERT = 1; $IT9@}*{
public final static int BUBBLE = 2; `C?OAR44
public final static int SELECTION = 3; z0[ZO1Fo(
public final static int SHELL = 4; >2 qP
public final static int QUICK = 5; RWo B7{G
public final static int IMPROVED_QUICK = 6; B-|Zo_7
public final static int MERGE = 7; \Agg6tYr
public final static int IMPROVED_MERGE = 8; \W^+vuD8
public final static int HEAP = 9; N=wy)+
y}HC\A77uD
public static void sort(int[] data) { KgWT&^t
sort(data, IMPROVED_QUICK); p ri{vveN@
} =3C)sz}
private static String[] name={ Zwns|23n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r![JPhei
}; K>6k@okO
s*~o%emw
private static Sort[] impl=new Sort[]{ DZ.trtK
new InsertSort(), 0QqzS
new BubbleSort(), HjS^ nYl
new SelectionSort(), kG$8E
new ShellSort(), ONiI:Z>%
new QuickSort(), z44~5J]
new ImprovedQuickSort(), SYPMoE!U:
new MergeSort(), 3&fFIab9
new ImprovedMergeSort(), /*^|5>-`i1
new HeapSort() Z;\"pP:
}; 6ya87H'e@
<@2# VG
public static String toString(int algorithm){ "@w%TcA
return name[algorithm-1]; E}9ldM=]s
} ](:FW '-
c|( ?
public static void sort(int[] data, int algorithm) { ~9{;VKgK
impl[algorithm-1].sort(data); >1G*ya)
} p30&JJ!~"
/t)c fFM
public static interface Sort { ~"2@A F
public void sort(int[] data); ~!9Px j*
} r;X0B
.{a2z*o
public static void swap(int[] data, int i, int j) { {WeXURp&nF
int temp = data; UH-uU~
data = data[j]; {FY[|:Cp
data[j] = temp; t`ceVS
} "ak9LZQ9z
} 5qkuKF