[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 0`=>/Wr39
} ?.*^#>-
int i1=l; f!H~BMA+a
int i2=mid+1; w#-J ?/m
for(int cur=l;cur<=r;cur++){ VuU{7:
if(i1==mid+1) [5"F=tT7WP
data[cur]=temp[i2++]; {/u}
else if(i2>r) X npn{
data[cur]=temp[i1++]; YA?46[:
else if(temp[i1] data[cur]=temp[i1++]; SJ ay
else P5$L(x%~
data[cur]=temp[i2++]; DI>SW%)>
} "ZHA.M]`
} QDHTP|2e
,NA _pvH)
} u#Z#NP ~F0
Dr_ (u<[
改进后的归并排序: ntZl(]l
GW;\3@o
package org.rut.util.algorithm.support; 8AGP*"gI
&{gD(QG
import org.rut.util.algorithm.SortUtil; Cih~cwE
llK7~uOC
/** ?as1^~
* @author treeroot LBw$K0
* @since 2006-2-2 I@M3u/7
* @version 1.0 X<8
*/ ^U8^P]{R|
public class ImprovedMergeSort implements SortUtil.Sort { d#W>"Cqxqa
|[3%^!f\
private static final int THRESHOLD = 10; }2!=1|}
qX%oLa
/* 0rA&Q0
* (non-Javadoc) tDj/!L`
* 0!5w0^1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5 A2u|UU
*/ rGt/ /6
public void sort(int[] data) { 4?c4GT9(6S
int[] temp=new int[data.length]; P2t9RCH
mergeSort(data,temp,0,data.length-1); B]lM69Hz
} XD8Q2un
1Y6DzWI
private void mergeSort(int[] data, int[] temp, int l, int r) { bMvHAtp
int i, j, k; +\yQZ{4'@
int mid = (l + r) / 2; b9L"?{
if (l == r) P:QSr8K
return; Er!s$h
if ((mid - l) >= THRESHOLD) gY/p\kwsj
mergeSort(data, temp, l, mid); tXg>R _\C
else ;W2Rl%z88
insertSort(data, l, mid - l + 1); C8bBOC(
if ((r - mid) > THRESHOLD) y yqya[-11
mergeSort(data, temp, mid + 1, r); )Zbrg~-@
else \ 0J&^C
insertSort(data, mid + 1, r - mid); av:9kPKm
6)#=@i` \
for (i = l; i <= mid; i++) { tvEf-z
temp = data; hTS?+l
} CGCI3Z'
for (j = 1; j <= r - mid; j++) { 6 66f;h
temp[r - j + 1] = data[j + mid]; %kXg|9Bx!
} T*bBw
int a = temp[l]; h3BDHz,
int b = temp[r]; fZNWJo# `.
for (i = l, j = r, k = l; k <= r; k++) { --BS/L-
if (a < b) { w\`u|f;Aq
data[k] = temp[i++]; rzO5 3\
a = temp; %7[Z/U=
} else { 6U?z
data[k] = temp[j--]; rL3 f%L
b = temp[j]; N^@aO&+A
} V^D!$#
} +-d)/h.7
} k=``Avp?
:J~sz)n4
/** i&',g
* @param data dHJ#xmE!pP
* @param l 9LK<u$C
* @param i jFPD SR5
*/ |4?O4QN
private void insertSort(int[] data, int start, int len) { wzNGL{3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {~a+dEz
} *-lw2M9V
} xp;CYr"1}
} /AhN$)(O
} 5* 3T+OK
(sN;B)
堆排序： ;($"_h
QsC6\Gt#
package org.rut.util.algorithm.support; hY[Vs5v
Unc_e
import org.rut.util.algorithm.SortUtil; ,o68xfdZVW
$CP_oEb
/** Kjfpq!NYE
* @author treeroot %wk3&EC.
* @since 2006-2-2 RM `zxFn
* @version 1.0 9f7T.}HM
*/ <o:|0=Swb
public class HeapSort implements SortUtil.Sort{ lq*{2M{[
;rjd?r
/* (non-Javadoc) Nub)]S>_/t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6>R|B?I%
*/ rQM$lJ[x
public void sort(int[] data) { /\e&nYz
MaxHeap h=new MaxHeap(); Jh!'"7
h.init(data); X|wg7>kh*`
for(int i=0;i h.remove(); +#=l{_Z,ZJ
System.arraycopy(h.queue,1,data,0,data.length); iciw 54;4
} ae-hQF&
qOi"3_
private static class MaxHeap{ jGaI6G'N
X\ bXat+
void init(int[] data){ ccm(r~lhJ
this.queue=new int[data.length+1]; 8 bpYop7 L
for(int i=0;i queue[++size]=data; `%nj$-W:
fixUp(size); Wv4o:_}
} f'28s*n
} +:jx{*}jo
_zF*S]9 X
private int size=0; &>$+O>c ,
(>usa||
private int[] queue; JK_(!
GRq0nhJ
public int get() { Exu>%
return queue[1]; "CcdwWM
} OD~B2MpM>
N_^s;Qj
public void remove() { N`1W"Rx!
SortUtil.swap(queue,1,size--); :,[=g$CT:
fixDown(1); TOC2[mc'
} 5kbbeO|0G
file://fixdown 75?z" i
private void fixDown(int k) { k3S
int j; &w7Ev21
while ((j = k << 1) <= size) { 6X`i*T$.
if (j < size %26amp;%26amp; queue[j] j++; ).D+/D/"2
if (queue[k]>queue[j]) file://不用交换 Li8$Rb~q
break; C0v1x=(xiM
SortUtil.swap(queue,j,k); zC<k4[.
k = j; +2?=W1`
} JT(6Uf
} NuQ l
private void fixUp(int k) { &upM,Jsr*
while (k > 1) { !eE;MaS>
int j = k >> 1; %f'mW2
if (queue[j]>queue[k]) p^>_VE[S
break; i$CN{c*
SortUtil.swap(queue,j,k); T_3JAH e
k = j; Ww)p&don
} e/s8?l
} O}w"@gO@.
sjIUW$
} _'Rzu'$`
ckhU@C|=*
} 'ugc=-0pd
43m@4Yb
SortUtil： R.'-jvO
IF~E;
package org.rut.util.algorithm; 2*)2c[/0F
'^10sf`"
import org.rut.util.algorithm.support.BubbleSort; |x#w8=VP-
import org.rut.util.algorithm.support.HeapSort; J<;@RK,c_
import org.rut.util.algorithm.support.ImprovedMergeSort; 0s'h2={iI
import org.rut.util.algorithm.support.ImprovedQuickSort; b<bj5m4fz>
import org.rut.util.algorithm.support.InsertSort; [Zxv&$SQ
import org.rut.util.algorithm.support.MergeSort; `WRM7
import org.rut.util.algorithm.support.QuickSort; cN3!wE
import org.rut.util.algorithm.support.SelectionSort; 3Z%~WE;I
import org.rut.util.algorithm.support.ShellSort; UYw=i4J'
J1UG},-h
/** }N,$4h9Dj
* @author treeroot 0(|Yy/Yq
* @since 2006-2-2 ZULnS*V;5
* @version 1.0 wSd|-e
*/ +{h.nqdAE
public class SortUtil { `p'682xI
public final static int INSERT = 1; .$"13"
public final static int BUBBLE = 2; j/p1/sJ[y
public final static int SELECTION = 3; *YO^+]nmY
public final static int SHELL = 4; u8Ak2:
public final static int QUICK = 5; +=MN_
public final static int IMPROVED_QUICK = 6; f1w_Cl
public final static int MERGE = 7; riv8qg
public final static int IMPROVED_MERGE = 8; z;Jz^m-
public final static int HEAP = 9; /N9ct4 {^
8yDe{
public static void sort(int[] data) { s C>Oyh:%!
sort(data, IMPROVED_QUICK); cNl NJ
} 9T#${NK
private static String[] name={ '4ip~>3?w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bw/8-:eb
}; Q].p/-[(
zvbO q
private static Sort[] impl=new Sort[]{ [nASMKK0
new InsertSort(), lc[)O3,,B
new BubbleSort(), ,n3e8qd
new SelectionSort(), 2!Qg1hM
new ShellSort(), |i\%>Y,
new QuickSort(), y|/[;
new ImprovedQuickSort(), 0,whTnH|
new MergeSort(), =6'Fm$R
new ImprovedMergeSort(), 92x)Pc^D
new HeapSort() 43?uTnX/
}; GIZw/L7Yb
?DGg.2f
public static String toString(int algorithm){ !nU|3S[b
return name[algorithm-1]; %<0'xJ%%Q
} v`@M IOv
ykYef
public static void sort(int[] data, int algorithm) { 3<)+)n
impl[algorithm-1].sort(data); 7!dj&?
} wxo*\WLe
yV*jc`1
public static interface Sort { JNv@MJb}
public void sort(int[] data); .*edaDi
} %xrldn%
`ZU]eAV
public static void swap(int[] data, int i, int j) { B$M4f7
int temp = data; !dq$qUl/
data = data[j]; q|V|Jl
data[j] = temp; KM"BHaSkF
} D"gv:RojD
} Gz52^O: