[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; '%@fW:r~
} UN7>c0B
int i1=l; >4gGb)
int i2=mid+1; Cv@ZzILyoK
for(int cur=l;cur<=r;cur++){ uyt]\zVT
if(i1==mid+1) qNI2+<u)j
data[cur]=temp[i2++]; ('qu#.'
else if(i2>r) (Kl96G<Wej
data[cur]=temp[i1++]; <r_L-
else if(temp[i1] data[cur]=temp[i1++]; yF&"'L
else Nr\[|||%
data[cur]=temp[i2++]; m{(G%n>E&
} 'lPt.*Y<u
} $"z|^ze
0ZY.~b'eu
} o ]UG*2
|p"P+"#
改进后的归并排序: ~yQby&s
wb@TYvDt
package org.rut.util.algorithm.support; d4Y8q1
|!VSed#FSn
import org.rut.util.algorithm.SortUtil; ou;E@`h;x
n>d@}hyv
/** oMH-mG7:K
* @author treeroot :J|t! `
* @since 2006-2-2 F]e]
* @version 1.0 =-XI)JV#
*/ 0{0|M8
public class ImprovedMergeSort implements SortUtil.Sort { jpcbW
o1x IGP<
private static final int THRESHOLD = 10; Q/oel'O*x
ai7*</ls
/* 7B@[`>5?%L
* (non-Javadoc) 1'c
* 0_d,sC?V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )/BI:)
*/ jmgU'w-s
public void sort(int[] data) { NwH`t#zd
int[] temp=new int[data.length]; 3urL*Fw,
mergeSort(data,temp,0,data.length-1); %:bTOw[4r
} U$;FOl
v%_5!SR
private void mergeSort(int[] data, int[] temp, int l, int r) { L*TPLS[lh
int i, j, k; %d<uOCf\Q
int mid = (l + r) / 2; u{F^Ngy )
if (l == r) zKycd*X
return; 's.%rre%
if ((mid - l) >= THRESHOLD) UZ8 vZ
mergeSort(data, temp, l, mid); 8!a6)Zeux
else Q;m:o8Q5
insertSort(data, l, mid - l + 1); .VFa,&5;3
if ((r - mid) > THRESHOLD) 9>y6zFTV
mergeSort(data, temp, mid + 1, r); ?&Zfb
else }cov"o
insertSort(data, mid + 1, r - mid); }}AooziH9
aJ[K'5|
for (i = l; i <= mid; i++) { 3z^l
temp = data; X2avo|6e
} k 7 !{p
for (j = 1; j <= r - mid; j++) { 739J] M
temp[r - j + 1] = data[j + mid]; E;[ANy4L
} V2< 4~J2:9
int a = temp[l]; ~*WSH&ip
int b = temp[r]; [ugBVnma
for (i = l, j = r, k = l; k <= r; k++) { wYxnKm~f
if (a < b) { !+qy~h
data[k] = temp[i++]; b2x8t7%O
a = temp; FBn`sS8hH
} else { Ep/kb-~-
data[k] = temp[j--]; p~ `f.q$'
b = temp[j]; cVrses^yE
} e0i&?m
} w Phs1rL
} ?nWK s
xHs8']*\
/** eGZ{%\PH<
* @param data 4wLp
* @param l !!NVx\a
* @param i O gQE1{C
*/ Y9h~ hD
private void insertSort(int[] data, int start, int len) { x1\a_Kt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EZ+_*_9
} GEr]zMYG[A
} 'g<0MOq{
} 1BQB8i-,
} q&.SB`
=c{/ Z
堆排序： Im9^mVe
< * )u\A
package org.rut.util.algorithm.support; V~rF`1+5N
giU6f!%
import org.rut.util.algorithm.SortUtil; _x<CTFTL
Jf<+VJ>t
/** }@-4*5P3
* @author treeroot O2[uN@nY
* @since 2006-2-2 :Oz! M&Ov
* @version 1.0 >P7|-bV
*/ P4vW.|@
public class HeapSort implements SortUtil.Sort{ [[{y?-U
tx=~bm"*?
/* (non-Javadoc) wO6`Ap t1:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Etk`>,]Y>y
*/ ^rd]qii"
public void sort(int[] data) { &%QtUPvr9
MaxHeap h=new MaxHeap(); BdHLow
h.init(data); ulM6R/V:?
for(int i=0;i h.remove(); i#$N,kt
System.arraycopy(h.queue,1,data,0,data.length); 92}UP=RW!
} a0y7a/@c
>3HLm3T
private static class MaxHeap{ F<wwuCbF
&lg+uK
void init(int[] data){ !C&!Wj
this.queue=new int[data.length+1]; A;~u"g'z&
for(int i=0;i queue[++size]=data; 52-Gk2dp
fixUp(size); chE~UQ
} B2UQO4[w
} KNtsz[#b
nK*$P +[R
private int size=0; l@-J&qG
OSc&n>\t
private int[] queue; cnh\K.*}_x
]V!q"|
public int get() { 8$ dJh]\Y
return queue[1]; u_.`I8qa
} &PRu[!
<&3qFK*9r
public void remove() { Q<$I,C]
SortUtil.swap(queue,1,size--); S:qML]RO
fixDown(1); _9!_fIY
} Xz`?b4i
file://fixdown =y" lX{}G
private void fixDown(int k) { @}&o(q1M0
int j; _1w?nN'
while ((j = k << 1) <= size) { 2J;h}/!H
if (j < size %26amp;%26amp; queue[j] j++; Q/T\Rr_d
if (queue[k]>queue[j]) file://不用交换 Yc+0OBH[
break; [([?+Ouy
SortUtil.swap(queue,j,k); y>zPsc,
k = j; mZ9+.lm
} !Kv.v7'N/k
} yQ)y#5/<6
private void fixUp(int k) { wTBp=)1)f
while (k > 1) { 9)={p9FZY
int j = k >> 1; I>X_j)
if (queue[j]>queue[k]) \D8d!gr
break; K9Dxb
SortUtil.swap(queue,j,k); {3Z&C$:s
k = j; Y$8 >fv
} 3RpDIl`0
} ~Ein)5
lxTW1kr
} Z IfhC'
DJSSc
} D@T>z;
AtNu:U$
SortUtil： e-Z+)4fH
[G{{f
package org.rut.util.algorithm; ^7Q}W#jy
W.h6g8|wx
import org.rut.util.algorithm.support.BubbleSort; CA[-\>J7y
import org.rut.util.algorithm.support.HeapSort; !( xeDX
import org.rut.util.algorithm.support.ImprovedMergeSort; 0tVZvXgTu
import org.rut.util.algorithm.support.ImprovedQuickSort; l_JPkM(mJw
import org.rut.util.algorithm.support.InsertSort; >/;V_(
import org.rut.util.algorithm.support.MergeSort; N_TWT&o4
import org.rut.util.algorithm.support.QuickSort; 9kj71Jp&}
import org.rut.util.algorithm.support.SelectionSort; 4}sfJ0HhX
import org.rut.util.algorithm.support.ShellSort; wkm;yCF+
Mfjj+P
/** pQc5'*FKd
* @author treeroot aML?$_6
* @since 2006-2-2 `A O_e4D0i
* @version 1.0 :Mr_/t2(
*/ xk=5q|u_-
public class SortUtil { r=[T5,L(s
public final static int INSERT = 1; T1ZAw'6(K
public final static int BUBBLE = 2; wPTXRq%
public final static int SELECTION = 3; >W[8wR
public final static int SHELL = 4; T 'pX)ZH
public final static int QUICK = 5; Kx.I'_Qk
public final static int IMPROVED_QUICK = 6; .L'>1H]B
public final static int MERGE = 7; QjMH1S
public final static int IMPROVED_MERGE = 8; ^]}UyrOn
public final static int HEAP = 9; fw@n[u{~
'6*^s&H~
public static void sort(int[] data) { H8j#rC#&pm
sort(data, IMPROVED_QUICK); !gv/jdF
} #)`N
private static String[] name={ D2x-Wa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >x0"gh
}; 1au1DvH
"\bbe@
private static Sort[] impl=new Sort[]{ *"#62U6
new InsertSort(), FCxLL"))
new BubbleSort(), 9:N@+;|T
new SelectionSort(), HgJ:Rf]
new ShellSort(), +VSJve |
new QuickSort(), \vbU| a
new ImprovedQuickSort(), *9((X,v@/
new MergeSort(), ej dYh $
new ImprovedMergeSort(), }6SfI;
new HeapSort() f Co-ony
}; 8/X#thG
_y{z%-
public static String toString(int algorithm){ w[@>k@=
return name[algorithm-1]; 7!Z\B-_,
} &U:bRzD
:lQl;Q -e
public static void sort(int[] data, int algorithm) { ,w%cX{
impl[algorithm-1].sort(data); T% J;~|
} Fi.gf?d
-miWXEe@l
public static interface Sort { t3!?F(&
public void sort(int[] data); s"b()JP
} We3Z#}X
mB&nN+MV
public static void swap(int[] data, int i, int j) { $@kGbf~k
int temp = data; +9db1:
data = data[j]; FWqnlK#
data[j] = temp; (6i)m c(
} vKYdYa\
} kylR)