[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; Rv ?Go2
} h<\o[n7j
int i1=l; G+ PBV%gE[
int i2=mid+1; /]2-I_WB
for(int cur=l;cur<=r;cur++){ 12DMb9_rp
if(i1==mid+1) g<{/mxv/
data[cur]=temp[i2++]; #sdW3m_%
else if(i2>r) qlD+[`=b
data[cur]=temp[i1++]; "2(lgxhj
else if(temp[i1] data[cur]=temp[i1++]; *O,\/aQ+
else DtG><g}[]
data[cur]=temp[i2++]; NmYSk6kWJ
} e4u$+
} ~ z*
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} YOwo\'|=
%h 6?/
改进后的归并排序: /ZHuT=j1
D{I^_~-\5
package org.rut.util.algorithm.support; dbSIC[q
S:/;|Dg
import org.rut.util.algorithm.SortUtil; {EGiGwpf
?~uTbNR
/** RzQ1Wq
* @author treeroot o{pQDI {R
* @since 2006-2-2 Q\&FuU
* @version 1.0 'm}K$h(U
*/ >t7xa]G
public class ImprovedMergeSort implements SortUtil.Sort { u*Z>&]W_
DhV($&*M
private static final int THRESHOLD = 10; |4aV~n[>#
"{105&c\
/* SdBv?`u|g
* (non-Javadoc) ?Q[uIQ?dV
* 0RAmwfXm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .x5Yfe
*/ !}|n3wQ
public void sort(int[] data) { A-1Wn^,>*
int[] temp=new int[data.length]; _Sy-&}c+ +
mergeSort(data,temp,0,data.length-1); :&}(?=<R}L
} P66{l^
Re-~C[zwT
private void mergeSort(int[] data, int[] temp, int l, int r) { 5:/ zbt\C
int i, j, k; f@l$52f3D
int mid = (l + r) / 2; vpcx 1t<
if (l == r) ;E>5<[aa
return; no`c[XY
if ((mid - l) >= THRESHOLD) 3P~I'FQ
mergeSort(data, temp, l, mid); JO\Tf."a\
else eU'DQp*
insertSort(data, l, mid - l + 1); "_]n_[t2C
if ((r - mid) > THRESHOLD) J*$u
mergeSort(data, temp, mid + 1, r); *gfx'$
else -hj@^Auf
insertSort(data, mid + 1, r - mid); ojU:RRr4l$
=k6zUw;5 U
for (i = l; i <= mid; i++) { Vd~{SS2>
temp = data; -FV$Sne
} /fbI4&SB!
for (j = 1; j <= r - mid; j++) { F%@( $f
temp[r - j + 1] = data[j + mid]; P1)f-:;
} m6tbN/EJZ
int a = temp[l]; j9Ptd$Uj
int b = temp[r]; lb ol+O65
for (i = l, j = r, k = l; k <= r; k++) { X5UcemO
if (a < b) { y E-H-r~I
data[k] = temp[i++]; H$TYp
a = temp; Nq6~6Rr
} else { 6I GUp
data[k] = temp[j--]; rq?:I:0
b = temp[j]; &SfJwdG*=
} a)=WDRk
} \PU3{_G]
} &QO~p3M
u}Vc2a,WV
/** uH[d%y/
* @param data ]Aap4+s
* @param l (e sTb,
* @param i g\;AU2?p7
*/ =KqcWN3k
private void insertSort(int[] data, int start, int len) { j_S///
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B5h-JON]-
} 7^,C=2
} jV Yt=j*"V
} hO^8CA,5
} )w];eF0c
rB|Mp!g%@
堆排序： oR (hL4Dc
+shT}$cb1
package org.rut.util.algorithm.support; N<o3pX2i]
uU(G&:@
import org.rut.util.algorithm.SortUtil; Cc*"cQe
V&`\ s5Q
/** _"n1"%Ns
* @author treeroot csE 9Ns
* @since 2006-2-2 N1$lG? )+
* @version 1.0 y;A<R[|Ve
*/ Kn3qq
public class HeapSort implements SortUtil.Sort{ @w&VI6
w"d~R
/* (non-Javadoc) f1MKYM%^x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^|y6oj
*/ <,p|3p3
public void sort(int[] data) { &No6k~T0:b
MaxHeap h=new MaxHeap(); UMR0S5`}
h.init(data); <>$`vuU
for(int i=0;i h.remove(); K=Z~$)Og)
System.arraycopy(h.queue,1,data,0,data.length); xLX<.z!r
} tWR>I$O8F
lJ.:5$2H
private static class MaxHeap{ W^; wr#
KrE:ilm#^Y
void init(int[] data){ "?EoYF_
this.queue=new int[data.length+1]; gTWl];xja
for(int i=0;i queue[++size]=data; yO Ed8
fixUp(size); Jydz2 zt!
} vQB;a?)o
} BwtjTwd
E!<w t
private int size=0; V`xZ4 i%L
\GYh"5
private int[] queue; @wO"?w(
k(1]!c4J0
public int get() { QX}O{LQR
return queue[1]; l H:Y8j
} eh_{-
SKf9 yS#
public void remove() { '>dsROB->
SortUtil.swap(queue,1,size--); |uo<<-\jTO
fixDown(1); x+Vp&
} mU.(aLHW
file://fixdown *Pj[r
private void fixDown(int k) { EIZSV>
int j; pvCn+y/U;
while ((j = k << 1) <= size) { y<r7_ysi
if (j < size %26amp;%26amp; queue[j] j++; P,5gaT)
if (queue[k]>queue[j]) file://不用交换 )>,; GVu"
break; j2O?]M
SortUtil.swap(queue,j,k); Yw7+wc8R
k = j; eytd@-7uX
} UHr0J jQK
} ,iKEIxA!
private void fixUp(int k) { ~=HrD?-99p
while (k > 1) { [/_M!&zz2
int j = k >> 1; HPl'u'.Hg
if (queue[j]>queue[k]) ^8dd
break; 7hAFK
SortUtil.swap(queue,j,k); g/H:`J
k = j; y9W6e"
} 3^p<Wx
} /)I:Cz/f
%qG nvQ
} .xJW=G{/
{m1=#*
} GFM$1}
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SortUtil： >y&Db
C1=7.dPr
package org.rut.util.algorithm; kmHIU}Z
ho*44=j
import org.rut.util.algorithm.support.BubbleSort; VQSwRL3B=
import org.rut.util.algorithm.support.HeapSort; Z"spua5
import org.rut.util.algorithm.support.ImprovedMergeSort; y&8' V\
import org.rut.util.algorithm.support.ImprovedQuickSort; rv`kP"I
import org.rut.util.algorithm.support.InsertSort; a/d'(]
import org.rut.util.algorithm.support.MergeSort; m1,?rqeb
import org.rut.util.algorithm.support.QuickSort; PF$K> d
import org.rut.util.algorithm.support.SelectionSort; O'tVZ!C#J
import org.rut.util.algorithm.support.ShellSort; 9+'QH
zY?GO"U"
/** 3`y9V2&b
* @author treeroot ;r(hZ%pD
* @since 2006-2-2 K_\fO|<k
* @version 1.0 )b<-=VR
*/ $dr=M(&
public class SortUtil { US8pT|/
public final static int INSERT = 1; w!$|IC
public final static int BUBBLE = 2; `[T|Ck5
public final static int SELECTION = 3; l=(4o4um
public final static int SHELL = 4; R@lmX%Z1
public final static int QUICK = 5; J;Y=oB
public final static int IMPROVED_QUICK = 6; 6{2LV&T=u
public final static int MERGE = 7; sW/^82(dM
public final static int IMPROVED_MERGE = 8; ?m&?BsW$)
public final static int HEAP = 9; r;3{%S._
PnB%vS
public static void sort(int[] data) { #BA=?7
sort(data, IMPROVED_QUICK); sT|$@$bN
} 6"+/Imb-
private static String[] name={ {d`e9^Z:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =-#>NlB$w
}; u,<#z0R|;$
L<HJ!
private static Sort[] impl=new Sort[]{ c^^[~YWj
new InsertSort(), ;{Cr+lqTJ
new BubbleSort(), 1r6>.&p
new SelectionSort(), 9f ,$JjX[
new ShellSort(), tb;!2$
new QuickSort(), anwMG0
new ImprovedQuickSort(), #{973~uj
new MergeSort(), [kf$82
new ImprovedMergeSort(), SrMg=a
new HeapSort() ,xA`Fu9^
}; BR1oE3in
X"V,3gDG
public static String toString(int algorithm){ 9}e`_z
return name[algorithm-1]; A%H"a+
} HX1RA5O
`<I+(8]Uz
public static void sort(int[] data, int algorithm) { &A=>x
impl[algorithm-1].sort(data); %T:~N<8)
} NYwE=b~I
"S6'<~s
public static interface Sort { ^l\U6$3
public void sort(int[] data); YJZViic
} Q v/}WnBk
Y.M^tH:
public static void swap(int[] data, int i, int j) { X}?`G?'
int temp = data; n[Jpy[4g
data = data[j]; UEeD Nl$^u
data[j] = temp; eNN)2-96
} CB(Qy9C%h[
} 2BA'Zu`