[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; [^wEKRt&
} _hP siZY9
int i1=l; N[e QT
int i2=mid+1; cBICG",TA
for(int cur=l;cur<=r;cur++){ H:9Z.|{Gv
if(i1==mid+1) 566vjE
data[cur]=temp[i2++]; m\a_0!K
else if(i2>r) R?aE:\A
data[cur]=temp[i1++]; \~V ZY
else if(temp[i1] data[cur]=temp[i1++]; 9=,^^,q
else !e~Yp0gX#
data[cur]=temp[i2++]; K:PzR,nn
} scmn-4j'{
} }$DLa#\-
hjCFN1 #Sa
} l#7].-/
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改进后的归并排序: z@!zQ Vp
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package org.rut.util.algorithm.support; RQ?T~ASs
/18Z4TA
import org.rut.util.algorithm.SortUtil; ]y&w)-0
aoNTRJc$
/** 2+KOUd&jS
* @author treeroot <~aQ_l
* @since 2006-2-2 _@es9
* @version 1.0 K:}~8 P>^
*/ Be"Swz(n
public class ImprovedMergeSort implements SortUtil.Sort { QuuR_Ao?c'
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private static final int THRESHOLD = 10; (qn ;MN6<
x!\FB.h4!(
/* |~'D8 g:Ak
* (non-Javadoc) J?/.|Y]e
* O6rrv,+_L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >dH5n$Gb
*/ <^:e)W
public void sort(int[] data) { g=eYl_P6
int[] temp=new int[data.length]; NOOP_:(7H
mergeSort(data,temp,0,data.length-1); .Z=4,m>
} =[Lo9Sg
Vp3 9`m-W
private void mergeSort(int[] data, int[] temp, int l, int r) { V,,/}f'
int i, j, k; e_C9VNP
int mid = (l + r) / 2; ]TTX<R ZLr
if (l == r) 0,)Ao8
return; _ED,DM
if ((mid - l) >= THRESHOLD) J&,N1B
mergeSort(data, temp, l, mid); i!zh9,i>M
else L||_Jsu
insertSort(data, l, mid - l + 1); 5+U2@XV
if ((r - mid) > THRESHOLD) (nP 6Xq
mergeSort(data, temp, mid + 1, r); SB5[PDL_q
else ?h`Ned0P
insertSort(data, mid + 1, r - mid); ] iKFEd
BKoc;20;
for (i = l; i <= mid; i++) { 1FfdW>ay*
temp = data; $V"NB`T
} qX'w}nJ}H}
for (j = 1; j <= r - mid; j++) { xl5n(~g)p
temp[r - j + 1] = data[j + mid]; X|.M9zIx
} X1*6qd+E
int a = temp[l]; by*>w/@9)k
int b = temp[r]; JyPsRpi\
for (i = l, j = r, k = l; k <= r; k++) { 2N]u!S;d
if (a < b) { W":is"
data[k] = temp[i++]; muLt/.EZ
a = temp; i4TU}.h8
} else { m35Blg34
data[k] = temp[j--]; A`4Di8'Me
b = temp[j]; KMz\h2X
} \=+s3p5N
} \ iL&Aq}BO
} Qy ; M:q
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/** oOk.Fq
* @param data '8~cf
* @param l O[RmQ8ll
* @param i 1jZ:@M:
*/ rI&GM |
private void insertSort(int[] data, int start, int len) { rl)(4ad=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9GnNL I{
} riI0k{
} Z<a6U 3
} 4)=LOGW
} TQ&%SMCn
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堆排序： od>DSn3T
y:!MWZ
package org.rut.util.algorithm.support; x&3!z[m@@
{]ZZ]
import org.rut.util.algorithm.SortUtil; (_ov_3
Xu#\CYk
/** gF%lwq
* @author treeroot ,hK0F3?H>
* @since 2006-2-2 lo:]r.lX{
* @version 1.0 Du>dTi~
*/ VVuL+i
public class HeapSort implements SortUtil.Sort{ #bPio
g~d}?B\<@
/* (non-Javadoc) Egt;Bj#%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x8p#WB
*/ |u)?h]>
public void sort(int[] data) { &Pt|
MaxHeap h=new MaxHeap(); EWN$ILdD
h.init(data); e,zR
for(int i=0;i h.remove(); /:>f$k4~h
System.arraycopy(h.queue,1,data,0,data.length); Ygn"7
} 2F-!SI
x]%e_
private static class MaxHeap{ 84P^7[YX>
h$ M+Yo+
void init(int[] data){ k]x64hgm
this.queue=new int[data.length+1]; ~BCSm]j
for(int i=0;i queue[++size]=data; pTZPOv#?Q
fixUp(size); I/9ZUxQCyG
} %" $.2O@
} #{(?a.:
P,!W\N%3
private int size=0; ?/"@WP9
+SM $#
private int[] queue; P*/px4;6
ro37H2^Ty
public int get() { xkl'Y*
return queue[1]; \Ja%u"DA
} ;9c3IK@
oUZwZ_yKW
public void remove() { 7"=
SortUtil.swap(queue,1,size--); ,oDZ:";
fixDown(1); g'Ft5fQ"o/
} }Evyfc#D
file://fixdown fl~k')s
private void fixDown(int k) { V~5vVY_HG&
int j; ))!Z2PfD
while ((j = k << 1) <= size) { %Ua*}C
if (j < size %26amp;%26amp; queue[j] j++; D`e!CprF
if (queue[k]>queue[j]) file://不用交换 >8SX,
break; Z!6\KV]
SortUtil.swap(queue,j,k); }"fP,:n"KN
k = j; $c0SWz
} HhNH"b&
} k(\HAIW
private void fixUp(int k) { IGql^,b
while (k > 1) { dk({J
int j = k >> 1; t=S94^g
if (queue[j]>queue[k]) <PW*vo9v
break; |x{:GWq
SortUtil.swap(queue,j,k); 3z: rUhA
k = j; qYIBP?`g
} EBw}/y{Kt
} )aquf<u@
u4$d#0sA
} dT,X8 "
H1|X0a(j
} *we3i
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SortUtil： {exF"ap
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package org.rut.util.algorithm; \ ;Hj,z\
G#duZNBdc
import org.rut.util.algorithm.support.BubbleSort; P>L-,R(7e
import org.rut.util.algorithm.support.HeapSort; }<FBcc(n
import org.rut.util.algorithm.support.ImprovedMergeSort; D.qbzJz
import org.rut.util.algorithm.support.ImprovedQuickSort; S3hJL:3c
import org.rut.util.algorithm.support.InsertSort; F#4?@W
import org.rut.util.algorithm.support.MergeSort; tK{`?NS
import org.rut.util.algorithm.support.QuickSort; zo@>~G3$9
import org.rut.util.algorithm.support.SelectionSort; o'myo.k{
import org.rut.util.algorithm.support.ShellSort; &[I#5bGk
\EYhAx`2
/** ~,R_
* @author treeroot |\?-k
* @since 2006-2-2 g_>)Q
* @version 1.0 -K}@Gp
*/ +?MjY[8j
public class SortUtil { BEPDyy
public final static int INSERT = 1; j/9FiuK
public final static int BUBBLE = 2; Podm 3b
public final static int SELECTION = 3; +qpD>5#
public final static int SHELL = 4; ~ ;)@a
public final static int QUICK = 5; $g#X9/+<
public final static int IMPROVED_QUICK = 6; .eZ4?|at.F
public final static int MERGE = 7; ,2H5CFX/
public final static int IMPROVED_MERGE = 8; OD>-^W t;%
public final static int HEAP = 9; ; {I{X}b
rVQ:7\=Z
public static void sort(int[] data) { u9mMkzgSkP
sort(data, IMPROVED_QUICK); /CKkT.Le
} "TtK!>!.
private static String[] name={ a+\Gz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~<v`&Gm?"
}; M%&`&{
}kL%l
private static Sort[] impl=new Sort[]{ q7 Uu 8JXF
new InsertSort(), ?Dd2k%o
new BubbleSort(), 'y-IE#!5
new SelectionSort(), HW.S~eLw*
new ShellSort(), qK|r+}g|&
new QuickSort(), A!iH g__/t
new ImprovedQuickSort(), gADt%K2#Z
new MergeSort(), S)g5Tu)
new ImprovedMergeSort(), L=Dx$#|
new HeapSort() Y0|~]J(B
}; zRvYN
h]@Xucc
public static String toString(int algorithm){ @!%<JZEz3
return name[algorithm-1]; e yTYg
} Gjy'30IF
Duptles
public static void sort(int[] data, int algorithm) { vU{ZB^+&6o
impl[algorithm-1].sort(data); 2Y 6/,W
} a^Zn }R r
4pA<s-
public static interface Sort { #J2856bzS
public void sort(int[] data); j?w7X?1(
} `mCcD
>Cd%tIie*
public static void swap(int[] data, int i, int j) { q;kMeE*
int temp = data; u#J5M&#
data = data[j]; *WMcE$w/D
data[j] = temp; ?0'bf y]
} pk;bx2CP8
} 0" R|lTYq