[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; !]tZE%?
} y//yLrs;
int i1=l; z6tH2Wxf
int i2=mid+1; `TBI{q[y
for(int cur=l;cur<=r;cur++){ d%$'Y|
if(i1==mid+1) Y'NQt?h
data[cur]=temp[i2++]; Sm2 |I6
else if(i2>r) Nl_Sgyx,\
data[cur]=temp[i1++]; ,B>Rc#
else if(temp[i1] data[cur]=temp[i1++]; RlU=
else l\W[WQPh
data[cur]=temp[i2++]; V$Y5EX
} \-mz[<ep
} ,:!X]F#d$
kcd~`+C
} pZRKM<k
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改进后的归并排序: ;J3az`
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package org.rut.util.algorithm.support; x\vb@!BZ
LPgP;%ohO/
import org.rut.util.algorithm.SortUtil; Lh~Ym<CeN
~ #Gu:
/** xF*C0B;QL
* @author treeroot $=8?@My<
* @since 2006-2-2 lZTD>$
* @version 1.0 wL]7d3t
*/ * %p6+D-C
public class ImprovedMergeSort implements SortUtil.Sort { CVsc#=w0
.7-Yu1{2
private static final int THRESHOLD = 10; f Q.ea#xh^
cGw*edgp6
/* v%|()Z0
* (non-Javadoc) 2nOoG/6 E
* K (yuL[p`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >r7{e:~q
*/ $wa )e
public void sort(int[] data) { K[ZgT$zZ
int[] temp=new int[data.length]; iVM{ L
mergeSort(data,temp,0,data.length-1); oI9Jp`
} 4C&L%A
DXAA[hUjF
private void mergeSort(int[] data, int[] temp, int l, int r) { C'ZF#Z
int i, j, k; !m"(SJn"
int mid = (l + r) / 2; Za{sT&(|
if (l == r) ,4ftQJ
return; ;|v6^2H"
if ((mid - l) >= THRESHOLD) %Uk]e5Hu
mergeSort(data, temp, l, mid); Z7&Bn
else iYj+NL
insertSort(data, l, mid - l + 1); B$b'bw.
if ((r - mid) > THRESHOLD) !*wK4UcX"
mergeSort(data, temp, mid + 1, r); iG*3S)
else S5ofe]tS@
insertSort(data, mid + 1, r - mid); KOWxP47b
{ U a19~'>
for (i = l; i <= mid; i++) { Lxm1.TOJ
temp = data; K#g)t/SZ
} JcxhI]E
for (j = 1; j <= r - mid; j++) { <,,U>0?3
temp[r - j + 1] = data[j + mid]; xq',pzN
} -`6O(he
int a = temp[l]; <Tr_,Ya{9
int b = temp[r]; 7~[1%`
for (i = l, j = r, k = l; k <= r; k++) { 9viQ<}K<
if (a < b) { r=dFk?8XbC
data[k] = temp[i++]; S86%o,Saq\
a = temp; 5H#3PZaQ
} else { ~SkdP7 )
data[k] = temp[j--]; IMzhEm
b = temp[j]; LQSno)OZ
} &*Eyw s
} LV{a^!f`y
} ?\:ysTVu
F9]j{'#
/** Y7)YJI
* @param data [#H$@g|CT
* @param l +x$;T*0
* @param i HUurDgRi]
*/ @Nb&f<+gi
private void insertSort(int[] data, int start, int len) { { hUbK+dKZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OL*EY:]
} 9I/o;Js
} +`Bm
} KLlo^1.<
} b w5|gmO
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堆排序： NS"hdyA
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package org.rut.util.algorithm.support; S~`&K
u79.`,Ad&
import org.rut.util.algorithm.SortUtil; & v=2u,]T
|r5|IA
/** Kx6_Vp
* @author treeroot ,%X~/V
* @since 2006-2-2 X\\WQxj
* @version 1.0 ;<%~g8:XL
*/ ,WbO8#z+
public class HeapSort implements SortUtil.Sort{ mfLS</A
.EGZv(rz&
/* (non-Javadoc) EKf"e*|(L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !G3O!]
*/ \}t(g}7T
public void sort(int[] data) { `bO+3Y'5
MaxHeap h=new MaxHeap(); Ps0'WRJnx
h.init(data); ' -[
for(int i=0;i h.remove(); %"@KuqV
System.arraycopy(h.queue,1,data,0,data.length); $xmltvaF
} @jg*L2L6
n@w$5y1@
private static class MaxHeap{ =kohQ d.n
Q~]#x![u0
void init(int[] data){ 0Ep%&>@
this.queue=new int[data.length+1]; gPY2Bnw;l
for(int i=0;i queue[++size]=data; D52ELr7
fixUp(size); swuW6p
} ro7\}O:I
} y!fV+S,
{PGNPxUbe
private int size=0; e4Ol:V
u*Eb4
private int[] queue; /r Zj=
"YHqls}c
public int get() { 31k.{dnm
return queue[1]; C/ow{MxA
} 30g-J(Zg
)Z0pU\
public void remove() { V3K
SortUtil.swap(queue,1,size--); Ab -uK|<
fixDown(1); om$)8'A,l
} v"6q!
file://fixdown ^,'!j/w5
private void fixDown(int k) { L~SM#?z:ue
int j; HS]|s':
while ((j = k << 1) <= size) { "zR+}
if (j < size %26amp;%26amp; queue[j] j++; f$9V_j-K+
if (queue[k]>queue[j]) file://不用交换 ?%(8RQ
break; e?3 S0}
SortUtil.swap(queue,j,k); D#508{)
k = j; W"YFx*W
} uG&xtN8
} zS18Kl
private void fixUp(int k) { j*<H18^G
while (k > 1) { v7T05
int j = k >> 1; #rqLuqw
if (queue[j]>queue[k]) &(-+?*A`E
break; ,*8}TIS(s
SortUtil.swap(queue,j,k); yb56nd
k = j; $S|bD$e
} B@G'6 ?
} bcC;i~9
V9NE kS
} &,2XrXiFu
6<.Ma7)lA
} i[H`u,%+(
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SortUtil： "zJ1vIZY
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package org.rut.util.algorithm; 8-UlbO6
wlKfTJrn&
import org.rut.util.algorithm.support.BubbleSort; G+[hE|L~y
import org.rut.util.algorithm.support.HeapSort; Vq2d+ ,fb
import org.rut.util.algorithm.support.ImprovedMergeSort; E(*RtOC<W
import org.rut.util.algorithm.support.ImprovedQuickSort; l_FttN
import org.rut.util.algorithm.support.InsertSort; 3i=+ [
import org.rut.util.algorithm.support.MergeSort; fmY=SqQG-
import org.rut.util.algorithm.support.QuickSort; F#eZfj~
import org.rut.util.algorithm.support.SelectionSort; A#RA;Dt:
import org.rut.util.algorithm.support.ShellSort; 5;oWFl
IM|VGT0
/** i-~HT4iw
* @author treeroot z{Z'2,#
* @since 2006-2-2 4*d$o=wa
* @version 1.0 {<o_6 z`$
*/ yNi/JM
public class SortUtil { p)RASIB
public final static int INSERT = 1; \-$wY%7
public final static int BUBBLE = 2; s6%%/|
public final static int SELECTION = 3; 5ycccMx0V
public final static int SHELL = 4; ,IF3VE&r
public final static int QUICK = 5; PsMoH/+"
public final static int IMPROVED_QUICK = 6; 4,!#E0
public final static int MERGE = 7; ob05:D_bc9
public final static int IMPROVED_MERGE = 8; n.n;'p9t@
public final static int HEAP = 9; 0#0[E,
L,M=ogdb
public static void sort(int[] data) { (4o_\&
sort(data, IMPROVED_QUICK); |jH- bm
} ~cQ./G4
private static String[] name={ [KMW*pA7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *,q ?mO
}; C;];4[XR
NK;%c-r0v7
private static Sort[] impl=new Sort[]{ ~CCRs7V/L
new InsertSort(), @{3$H^
new BubbleSort(), .w/w] Eq
new SelectionSort(), FJomUVR.
new ShellSort(), rg64f'+Eug
new QuickSort(), X*hY?'Rp
new ImprovedQuickSort(), YAQ]2<H
new MergeSort(), yaza
new ImprovedMergeSort(), A-x; ai]
new HeapSort() $OB2ZS"
}; 1`J-|eH=Q
XFKe6:
public static String toString(int algorithm){ ad1I2
return name[algorithm-1]; uMKO^D
} :6~Nq/hZB
I},.U&r
public static void sort(int[] data, int algorithm) { #pO=\lJ,
impl[algorithm-1].sort(data); `dekaRo
} smaPZ^;; j
Fv$5Zcf
public static interface Sort { &~)PB |
public void sort(int[] data); zrVw l\&
} kk#%x#L[
R?Zv
public static void swap(int[] data, int i, int j) { EK`}?>'
int temp = data; KK$t3e)
data = data[j]; ea[vzD]
data[j] = temp; uNSaw['0j
} @a2n{
} k8IhQ{@