[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; <_?zln:4.
} j,IRUx13f
int i1=l; !MbzFs~
int i2=mid+1; [%W'd9`>
for(int cur=l;cur<=r;cur++){ ^r}c&@
if(i1==mid+1) ,Oo`*'a[o7
data[cur]=temp[i2++]; NvK9L.K
else if(i2>r) EF/d7
data[cur]=temp[i1++]; {X{R]
else if(temp[i1] data[cur]=temp[i1++]; C.j+Zb1Z(
else KE?t?p
data[cur]=temp[i2++]; ,'L>:pF3
} PyeNu3Il4
} 6[bopin
D9rQ%|}S
} 6BE,L
ep>!jMhJa
改进后的归并排序: kpOdyn(
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package org.rut.util.algorithm.support; *k?:k78L
E)b$;'
import org.rut.util.algorithm.SortUtil; R2bqhSlF
bM W|:rn
/** F.s$Y+c!6
* @author treeroot 2.qPMqH
* @since 2006-2-2 H MOIUd
* @version 1.0 dSI"yz
*/ zzmC[,u}
public class ImprovedMergeSort implements SortUtil.Sort { \;;M")$
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private static final int THRESHOLD = 10; -t-f&`S||
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/* `sjY#Ua<
* (non-Javadoc) 5Cf!NNV
* 4jT6h9%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /2^L;#
*/ "2%z;!U1
public void sort(int[] data) { ?0qVyK_1
int[] temp=new int[data.length]; s 6Wp"V(
mergeSort(data,temp,0,data.length-1); BR|!ya+_2
} S"bN9?;#u
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private void mergeSort(int[] data, int[] temp, int l, int r) { j cd<'\;
int i, j, k; j?T'N:Qd
int mid = (l + r) / 2; 7UTfafOGX
if (l == r) `IHP_IfR
return; sG g458
if ((mid - l) >= THRESHOLD) lg^'/8^f
mergeSort(data, temp, l, mid); r[9m-#)>
else X4!93
insertSort(data, l, mid - l + 1); UB~K/r`.|
if ((r - mid) > THRESHOLD) H4M=&"ll}
mergeSort(data, temp, mid + 1, r); V 6}5^W
else 6@]o,O
insertSort(data, mid + 1, r - mid); $q!A1Fgk0
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for (i = l; i <= mid; i++) { ,GOIg|51
temp = data; rFzNdiY
} W]4Z4&
for (j = 1; j <= r - mid; j++) { zDFNx:h
temp[r - j + 1] = data[j + mid]; GrF4*I`q
} VoCg,gow
int a = temp[l]; 'h$:~C
int b = temp[r]; }i9:k kfq2
for (i = l, j = r, k = l; k <= r; k++) { HwU9y
if (a < b) { E|pT6
data[k] = temp[i++]; ]w*"KG!(
a = temp; q@.>eB'92P
} else { IIk_!VzT
data[k] = temp[j--]; jN6V`Wh_
b = temp[j]; Lf_Y4a#
} n%Oi~7>
} ^^q&VL
} SQMl5d1d:
rgy I:F.
/** ;<~f-D,
* @param data N^ +q^iW
* @param l ._+cvXy
* @param i t{;2$z 0
*/ We6eAP/Z
private void insertSort(int[] data, int start, int len) { ED0cnr\yG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S5>s&
} !~ o%KQt
} [$3+5K#
} 2V~E <K-
} UfW=/T
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堆排序： ^f[6NYS?
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package org.rut.util.algorithm.support; O_ _s~
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import org.rut.util.algorithm.SortUtil; iEn:Hh)
Z+B*V)a=
/** [kg^S`gc#
* @author treeroot Dgz,Uad8f
* @since 2006-2-2 f y2vAwl
* @version 1.0 loA/d
*/ V7,dx@J-
public class HeapSort implements SortUtil.Sort{ 1zRYd`IPoq
R*GBxJaw
/* (non-Javadoc) >/ _#+,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EIw] 9;'_
*/ B/X$ZQ0
public void sort(int[] data) { bo<P%$(D
MaxHeap h=new MaxHeap(); v4e4,Nt
h.init(data); P'wo+Tn*
for(int i=0;i h.remove(); <M9NyD`
System.arraycopy(h.queue,1,data,0,data.length); $WIE`P%
} ILr=<j
!<TkX/O
private static class MaxHeap{ (uX?XX^
=%8 yEb*5#
void init(int[] data){ OROvy
this.queue=new int[data.length+1]; +iQ@J+k
for(int i=0;i queue[++size]=data; bci]"uzB
fixUp(size); 0 s+X:*C~
} <ll?rPio"
} Cu`
TG;[,oa
private int size=0; J2}poNmm
r10VFaly
private int[] queue; R'sNMWM
Dtd~}-_Q
public int get() { .@fA_8
return queue[1]; ZBDF>u@
} &]YyV.
JPn)Op6
public void remove() { t Cb34Wpf
SortUtil.swap(queue,1,size--); <O7!(
fixDown(1); bN-!&Td
} mhVLlbY|t
file://fixdown .X%J}c$
private void fixDown(int k) { i.'"`pn_
int j; |!] "y<
while ((j = k << 1) <= size) { 7tWC<#
if (j < size %26amp;%26amp; queue[j] j++; rJGh3%
if (queue[k]>queue[j]) file://不用交换 Btxtu"]nJo
break; 0)SRLHTY%
SortUtil.swap(queue,j,k); M~\dvJ$cH
k = j; 7LU^Xm8
} cW>=/
} =s!0EwDH3
private void fixUp(int k) { +rU{-`dy9'
while (k > 1) { <=p>0L
int j = k >> 1; K@*+;6y@
if (queue[j]>queue[k]) Hrpz4E%\Aw
break; @]q^OMLY
SortUtil.swap(queue,j,k); F oC $X
k = j; vD@|]@gq
} i=\)[;U
} MJch Z
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} l,lqhq\
5H.~pc2y
} [hSJ)IZh
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SortUtil： k*?T^<c3
qdI%v#'M
package org.rut.util.algorithm; /V09Na,N
,V,mz?d^9
import org.rut.util.algorithm.support.BubbleSort; *VhEl7
import org.rut.util.algorithm.support.HeapSort; ,2$<Pt;
import org.rut.util.algorithm.support.ImprovedMergeSort; "x9yb0
import org.rut.util.algorithm.support.ImprovedQuickSort; vY_[@y
import org.rut.util.algorithm.support.InsertSort; cy.r/Z}
import org.rut.util.algorithm.support.MergeSort; 9[zxq`qT}+
import org.rut.util.algorithm.support.QuickSort; d^A]]Xg
import org.rut.util.algorithm.support.SelectionSort; V3ozaVk;
import org.rut.util.algorithm.support.ShellSort; =tD*,2]
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/** %Zk6K!MY#
* @author treeroot z.8nYL5^}
* @since 2006-2-2 sR1_L/.
* @version 1.0 U4=l`{5on
*/ 3!l>\#q6
public class SortUtil { e:Y+-C5
public final static int INSERT = 1; <z\SKR[
public final static int BUBBLE = 2; ,5v'hG
public final static int SELECTION = 3; Ur#jJR@%3
public final static int SHELL = 4; A9b(P[!]T:
public final static int QUICK = 5; ^+D/59I
public final static int IMPROVED_QUICK = 6; ,e43m=KhK
public final static int MERGE = 7; N_bgWQY
public final static int IMPROVED_MERGE = 8; Cd)g8<
public final static int HEAP = 9; =F$?`q`
Fge%6hu
public static void sort(int[] data) { _aevaWtEx
sort(data, IMPROVED_QUICK); 5NZuaN
} ~'%d]s+q
private static String[] name={ C33Jzn's
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ybiTWM
}; fX`u"`o5
a6n@
private static Sort[] impl=new Sort[]{ m@XX2l9:9
new InsertSort(), )&_bY~P
new BubbleSort(), &zF>5@fM
new SelectionSort(), cEu_p2(7!B
new ShellSort(), V\zcv@
new QuickSort(), Ob]\t/:%P
new ImprovedQuickSort(), +8zACs{p
new MergeSort(), m8F$h-
new ImprovedMergeSort(), aInt[D(
new HeapSort() }{N#JTmjB#
}; =h4uN,
%cn1d>M+I
public static String toString(int algorithm){ 9f0`HvHC
return name[algorithm-1]; K>+ v" x
} ]7_>l>
$a~
public static void sort(int[] data, int algorithm) { #).^k-
impl[algorithm-1].sort(data); #B~;j5
} I[&x-}w
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public static interface Sort { THq}>QI
public void sort(int[] data); kEq~M10
} >97YK =
<~uzHg%Y
public static void swap(int[] data, int i, int j) { >bV3~m$a+
int temp = data; 0x~+=GUN
data = data[j]; X'$H'[8;C
data[j] = temp; mh"PAp
} 'Grej8
} E|;>!MMA;