[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; N<8\.z5:<
} jLVG=rOn
int i1=l; |$b8(g$s)
int i2=mid+1; 0cE9O9kE
for(int cur=l;cur<=r;cur++){ }L)[>
if(i1==mid+1) `hZh}K^
data[cur]=temp[i2++]; K^U="
else if(i2>r) Jz~:
data[cur]=temp[i1++]; w8w0:@0(
else if(temp[i1] data[cur]=temp[i1++]; 7;o:r$08&}
else j(Lz& *4
data[cur]=temp[i2++]; P,ueLG=
} vII{i
} ?a3wBy
9gcW;
} 1oej<67PdJ
;ND$4$
改进后的归并排序: Tc/^h4xH
!i)!|9e
package org.rut.util.algorithm.support; iRnjN
IQ@9S
import org.rut.util.algorithm.SortUtil; Yi%lWbr
RJ'[m~yl5X
/** !iKW1ks
* @author treeroot XnZ$%?$
* @since 2006-2-2 iHGVR
* @version 1.0 N:)x67,
*/ ~^1y(-cw
public class ImprovedMergeSort implements SortUtil.Sort { 22ON=NN
xrPZy*Y,
private static final int THRESHOLD = 10; ICN>kJ\;M
o>r P\
/* \Nt 5TG_
* (non-Javadoc) lH4Nbluc^
* EwzR4,r\M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;_I>`h"r
*/ TRGpE9i
public void sort(int[] data) { Ojc Tu
int[] temp=new int[data.length]; MW7~=T
mergeSort(data,temp,0,data.length-1); <R]m(
} T]De{nHu
+c))fPuV
private void mergeSort(int[] data, int[] temp, int l, int r) { ~#sD2b`0
int i, j, k; eP@#I^_
int mid = (l + r) / 2; .7.lr[$g
if (l == r) 1%+-}yo<
return; !i;6!w
if ((mid - l) >= THRESHOLD) { LvD\4h"
mergeSort(data, temp, l, mid); =y][j+WH
else r@4A%ql<
insertSort(data, l, mid - l + 1); Hh1_zd|
if ((r - mid) > THRESHOLD) nqo{]fn
mergeSort(data, temp, mid + 1, r); ]@#9B>v=
else *6/IO&y1a
insertSort(data, mid + 1, r - mid); \ASt&'E
#hxYB
for (i = l; i <= mid; i++) { F@u7Oel@m
temp = data; }3{eVct#|
} ?P'$Vxl
for (j = 1; j <= r - mid; j++) { =P(*j7=
temp[r - j + 1] = data[j + mid]; n5$#M
} +Uq|Yh'Q
int a = temp[l]; j}^w:W76
int b = temp[r]; <,M"kF:
for (i = l, j = r, k = l; k <= r; k++) { Y:!L
if (a < b) { 5s[nE\oaG
data[k] = temp[i++]; [[$CtqLg
a = temp; '0HOL)cIz
} else { cU6*y!}9
data[k] = temp[j--]; 7 9tE
b = temp[j]; B7 s{yb
} %zcA|SefP
} $%~JG(
} ~&<#H+O
>&(#p@#
/** :*Wq%Y=
* @param data 7zG r+Px
* @param l 3k1e
* @param i o!tC{"g
*/ +u$l]~St\
private void insertSort(int[] data, int start, int len) { ]DVr-f ~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bT,_=7F
} pkn^K+<n,
} iXMJ1\!q\|
} G=:/v
} ~[%CUc"
cw<IL
堆排序： 3x[Cpg,
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package org.rut.util.algorithm.support; ZwUBeyxS=c
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import org.rut.util.algorithm.SortUtil; Bv<gVt
'7?Y+R@|L
/** Z*k(Q5&U
* @author treeroot MltO.K!
* @since 2006-2-2 dxX`\{E
* @version 1.0 wK(]E%\
*/ $lxpwO
public class HeapSort implements SortUtil.Sort{ c""&He4zp
7P<VtS
/* (non-Javadoc) S`kOtZ_N n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gzs\C{4D
*/ 99=~vNn
public void sort(int[] data) { e0P[,e*0
MaxHeap h=new MaxHeap(); 9S%5Z>
h.init(data); B7f<XBU6>
for(int i=0;i h.remove(); 5Y *4a%"
System.arraycopy(h.queue,1,data,0,data.length); LzU'6ah';5
} 1$0Kvvg[
#tV1?q
private static class MaxHeap{ CP7Fe{P
( cs
void init(int[] data){ =Kkqk
this.queue=new int[data.length+1]; NVMn7H}>
for(int i=0;i queue[++size]=data; JR]2Ray
fixUp(size); 2_wue49-l
} Eg)24C R 4
} Ph=NH8
<odi>!ViH
private int size=0; j=O+U_w
uz!8=,DFw
private int[] queue; _WZx].|A=
% G=cKM
public int get() { g4ZUh@b~
return queue[1]; UVw^t+n
} V;: k-
nq!=9r
public void remove() { D)-LZbPa
SortUtil.swap(queue,1,size--); i6#*y!3{
fixDown(1); 76w[X=Fv
} N?qETp-:
file://fixdown 0T`Qoo>u
private void fixDown(int k) { Z,)H f
int j; |qX?F`
while ((j = k << 1) <= size) { ]'pfw9"f~
if (j < size %26amp;%26amp; queue[j] j++; LLgw1 @-D
if (queue[k]>queue[j]) file://不用交换 toY_1
break; Dl/ C?Fll
SortUtil.swap(queue,j,k); gkmof^
k = j; QP'sS*saJ
} :<aGZ\R5
} I7U/={[J
private void fixUp(int k) { ^|MS2'
while (k > 1) { k1z`92"
int j = k >> 1; (1CP]5W
if (queue[j]>queue[k]) 4 ?BQ&d
break; yP]>eLTSd
SortUtil.swap(queue,j,k); vl/!w2
k = j; vGi<" Sn7
} r%;|gIky
} sK%b16#
x_7$g<n
} |.9PwD8~VD
I;@q`Tm
} zYaFbNi
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SortUtil： 7Q!ksp
N #v[YO`.
package org.rut.util.algorithm; #f(a,,Uu'
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import org.rut.util.algorithm.support.BubbleSort; ;jgf,fbM
import org.rut.util.algorithm.support.HeapSort; q&:7R .Ci
import org.rut.util.algorithm.support.ImprovedMergeSort; N-l`U(Z~P
import org.rut.util.algorithm.support.ImprovedQuickSort; J;>;K6pW
import org.rut.util.algorithm.support.InsertSort; >4ex5
import org.rut.util.algorithm.support.MergeSort; 551_;,t
import org.rut.util.algorithm.support.QuickSort; 46vC/
import org.rut.util.algorithm.support.SelectionSort; ~Y43`@3H:
import org.rut.util.algorithm.support.ShellSort; 'Qt[cW
ubB1a_7
/** =RUy4+0>F
* @author treeroot iJOoO"Ai
* @since 2006-2-2 kVLZdXn,q2
* @version 1.0 QV."ZhL5=
*/ dkg`T#}
public class SortUtil { t!wbT79/
public final static int INSERT = 1; G>pedE\
public final static int BUBBLE = 2; y={ k7
public final static int SELECTION = 3; {#+K+!SvDX
public final static int SHELL = 4; M"]?'TMfXc
public final static int QUICK = 5; =X(N+(1~
public final static int IMPROVED_QUICK = 6; n$ByTmKxv
public final static int MERGE = 7; hg12NzbK
public final static int IMPROVED_MERGE = 8; F$>#P7ph\a
public final static int HEAP = 9; =0&XdxX
Sy?^+JdM/
public static void sort(int[] data) { zecM|S_
sort(data, IMPROVED_QUICK); 53/$8=
} >CG;df<~
private static String[] name={ 4+qo=i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qh bagw~
}; 4qDa:D"5
.z CkB86
private static Sort[] impl=new Sort[]{ 8;~,jZ s
new InsertSort(), MuO(%.H
new BubbleSort(), ,6y.wNb:F
new SelectionSort(), vy [7I8f{
new ShellSort(), a%y*e+oM
new QuickSort(), VB^1wm
new ImprovedQuickSort(), H1~9f{
new MergeSort(), D0\*WK$
new ImprovedMergeSort(), 4WlBQ<5
new HeapSort() Fu?_<G%Ynp
}; aIT0t0.
@6_w{6:b
public static String toString(int algorithm){ V#599-
return name[algorithm-1]; cl23y}J_?
} Hj-n 'XZ
\xOYa
public static void sort(int[] data, int algorithm) { e}gGl<((g
impl[algorithm-1].sort(data); g:^Hex?Yfd
} <qoc)p=__
1=_?Wg:
public static interface Sort { 'D+njxCk.A
public void sort(int[] data); (eT9N_W
} `j2|aX %Z*
<YG 42,N
public static void swap(int[] data, int i, int j) { UM1h[#?&V)
int temp = data; uf)!SxT
data = data[j]; FKtCUq,:
data[j] = temp; ktY
} nKwOSGPQt
} )WkN34Q