[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; E87Ww,z8
} tMf}
int i1=l; 3=aQG'B
int i2=mid+1; MygfT[_
for(int cur=l;cur<=r;cur++){ jIC_[
if(i1==mid+1) %C|n9*
data[cur]=temp[i2++]; '"SEw w
else if(i2>r) xMTKf+7
data[cur]=temp[i1++]; >7jbgHB
else if(temp[i1] data[cur]=temp[i1++]; X-K=!pET
else wn/_}]T
data[cur]=temp[i2++]; L~lxXTG\
} >\KNM@'KI
} u{['<r;I
5Co
} (k5We!4[1
0i!uUF
改进后的归并排序: D1zBsi94D
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package org.rut.util.algorithm.support; _m5uDF?[
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import org.rut.util.algorithm.SortUtil; Oo5w?+t
`6~Aoe
/** "s0)rqf<
* @author treeroot 2$+bJJM
* @since 2006-2-2 WW4vn|0v
* @version 1.0 v%+:/m1
*/ Br1&8L-|%
public class ImprovedMergeSort implements SortUtil.Sort { %5M/s'O?i
kMi/>gpQ
private static final int THRESHOLD = 10; [j=yMP38!:
HK,cJahq
/* }wr{W:j
* (non-Javadoc) g{OwuAC_
* z> Rsi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j*so9M6|c
*/ HN=V"a
public void sort(int[] data) { Dfg2`l
int[] temp=new int[data.length]; X[]m _@v
mergeSort(data,temp,0,data.length-1); 6Ypc`
} We$:&K0
E~Sb
private void mergeSort(int[] data, int[] temp, int l, int r) { FGigbtj`
int i, j, k; 8i>ZY
int mid = (l + r) / 2; R!\_rc1/
if (l == r) uwzvbgup?
return; JEXy%hl
if ((mid - l) >= THRESHOLD) l=S35og
mergeSort(data, temp, l, mid); e6@=wnoX u
else re/@D@%
insertSort(data, l, mid - l + 1); {C=NUK%?
if ((r - mid) > THRESHOLD) ] o*#t
mergeSort(data, temp, mid + 1, r); BLfTsNzmt
else .7e2YI,S
insertSort(data, mid + 1, r - mid); #hfXZVD
\KMToN&2
for (i = l; i <= mid; i++) { !=;+%C&8y
temp = data; rI= v
} be]bZ 1f
for (j = 1; j <= r - mid; j++) { Tl(^
temp[r - j + 1] = data[j + mid]; F,W~,y
} "-e \p lKj
int a = temp[l]; G18F&c~
int b = temp[r]; sqEI4~514
for (i = l, j = r, k = l; k <= r; k++) { $?Yry.2
if (a < b) { /oR0+sH]
data[k] = temp[i++]; 8ja$g,
a = temp; 7X0Lq}G@
} else { %HGD;_bhI
data[k] = temp[j--]; =XA;[PVx:#
b = temp[j]; UW N*j_9i
} 2D75:@JL}|
} xHL( !PF
} d"}k! 0m
-G}[AkmS
/** e@Fo^#ImDx
* @param data 6IBgt!=,
* @param l Yw4n-0g
* @param i $7O}S.x
*/ t[ubn+
private void insertSort(int[] data, int start, int len) { =5J7Hw&K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e<3K;Q
} aC$B2
} F"&~*m^+
} [B+yyBtx
} JJP08oP
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堆排序： nxUJN1b!N
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package org.rut.util.algorithm.support; >.Chl$)<
E(O74/2c8
import org.rut.util.algorithm.SortUtil; oe%}?u
`IP/d
/** +ln9c
* @author treeroot ^V?<K.F
* @since 2006-2-2 ^8 zR
* @version 1.0 rf $QxJ
*/ o)Iff)m$
public class HeapSort implements SortUtil.Sort{ $;1#To
iP =V8g?L
/* (non-Javadoc) d74d/l1*{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2)G %)'
*/ -e_hrCW&9
public void sort(int[] data) { 3kw,(-'1
MaxHeap h=new MaxHeap(); FG6h,7+
h.init(data); PPb7%2r
for(int i=0;i h.remove(); D?;"9e%
System.arraycopy(h.queue,1,data,0,data.length); ~Mx!^
} %SX|o-B~.o
oC<.=2]
private static class MaxHeap{ g<l1zo`_
JSkLEa~<
void init(int[] data){ K~c=M",mW
this.queue=new int[data.length+1]; O{QA
for(int i=0;i queue[++size]=data; d;zai]]
fixUp(size); r"C
} SQ44
} ^Y=\#-Dd
k3u"A_"c
private int size=0; G0/4JSH
T ?$:'XJ
private int[] queue; 5]NqRI^0
Kf>A\l^X7
public int get() { C>-aIz!y
return queue[1]; O[I\A[*
} @OV|]u
*AG#316
public void remove() { <oR a3Gi(%
SortUtil.swap(queue,1,size--); q;R],7Re
fixDown(1); ;|pBFKx
} ,=UK}*e"
file://fixdown E0Y-7&Fv
private void fixDown(int k) { RTE8Uq36
int j; y+X2Pl
while ((j = k << 1) <= size) { GC?ON0g5s
if (j < size %26amp;%26amp; queue[j] j++; rm5bkJcg~
if (queue[k]>queue[j]) file://不用交换 + ,%&e
break; B|R@5mjm
SortUtil.swap(queue,j,k); Sx708`/Ep
k = j; ]Y%Vio
} 9`1O"R/
} .LZwuJ^;
private void fixUp(int k) { 0O9Ni='Tn
while (k > 1) { >OL3H$F
int j = k >> 1; =8t]\Y?
if (queue[j]>queue[k]) +aJ>rR
break; x.f]1S7h[
SortUtil.swap(queue,j,k); fI{ESXU
k = j; tasIDoo+!J
} Gf,`
} 2[Z,J%:0
N!ls j \-
} P#RR9>Q
^Y@\1fX 4e
} SLkhCR
VRI0W`
SortUtil： Jbjmv:db
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package org.rut.util.algorithm; Gcdd3W`O
"/3 db[
import org.rut.util.algorithm.support.BubbleSort; vK9E
import org.rut.util.algorithm.support.HeapSort; ]Bcp;D
import org.rut.util.algorithm.support.ImprovedMergeSort; E;Y;z
import org.rut.util.algorithm.support.ImprovedQuickSort; )CuZDf@
import org.rut.util.algorithm.support.InsertSort; N):tOD@B
import org.rut.util.algorithm.support.MergeSort; Of"
import org.rut.util.algorithm.support.QuickSort; %5eY'
import org.rut.util.algorithm.support.SelectionSort; 2>cGH7EBD
import org.rut.util.algorithm.support.ShellSort; 5MN8D COF
+?:7O=Y
/** #pb92kA'
* @author treeroot e4!:c^?
* @since 2006-2-2 X'd9[).
* @version 1.0 $ {O#
*/ Km(n7Ah"
public class SortUtil { $"FQj4%d
public final static int INSERT = 1; jBgP$g
public final static int BUBBLE = 2; 6kNrYom
public final static int SELECTION = 3; !9[>L@#G
public final static int SHELL = 4; _I)U%?V+
public final static int QUICK = 5; {4G%:09~J
public final static int IMPROVED_QUICK = 6; VtnRgdJ
public final static int MERGE = 7; `+o2DA)#(
public final static int IMPROVED_MERGE = 8; )Qe~8u@?
public final static int HEAP = 9; ;nodjbr,j
tKuVQH~D
public static void sort(int[] data) { :pGaFWkvO
sort(data, IMPROVED_QUICK); Ove<mFI\
} )6q,>whI]
private static String[] name={ _CmOd-y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x[$z({Yf
}; >33=<~#n
|$vX<. S
private static Sort[] impl=new Sort[]{ g]4(g<:O
new InsertSort(), >Db;yC&
new BubbleSort(), Ov-icDMm
new SelectionSort(), OW3sS+y
new ShellSort(), ;D:9+E<>a
new QuickSort(), @)|C/oA
new ImprovedQuickSort(), EB2w0a5
new MergeSort(), v.pBX<
new ImprovedMergeSort(), tnPv70m
new HeapSort() j6Yy6X]
}; K POa|$
I1pWaQ0
public static String toString(int algorithm){ aMtsmL?=
return name[algorithm-1]; JT3-AAi[Z
} ^>i63Yc
K_RjX>q%N
public static void sort(int[] data, int algorithm) { +89*)pk
impl[algorithm-1].sort(data); 1guJG_;z
} N+Y]st+
I aGq]z
public static interface Sort { LIcM3_.
public void sort(int[] data); lu<xv
} 0`X]o'RxS
$,,op(
public static void swap(int[] data, int i, int j) { 7]blrN]
int temp = data; 4)A#2
data = data[j]; ,Wk?I%>
data[j] = temp; ]j`c]2EuP
} v^#~98g]
} nEJY5Bz$