[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; dpW`e>o
} upMs yLp(
int i1=l; ]-wyZ +a
int i2=mid+1; )u(,.O[cw
for(int cur=l;cur<=r;cur++){ (Aw@}!
if(i1==mid+1) \;XJ$~>
data[cur]=temp[i2++]; nAQ[ -NbW,
else if(i2>r) c44s@E
data[cur]=temp[i1++]; o "r
else if(temp[i1] data[cur]=temp[i1++]; 3cJ'tRsp<
else #?Ix6 {R
data[cur]=temp[i2++]; y>C !cYB
} Y~Uf2(7b5
} / B!j`UK
$?ss5: S
} ?8753{wk
~=yU%5 s@
改进后的归并排序: *L<EGFP
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package org.rut.util.algorithm.support; N1Y uLG:
@.L#u#
import org.rut.util.algorithm.SortUtil; ^C K!=oO
UR^r>
/** DlzL(p@r
* @author treeroot 2z;nPup,
* @since 2006-2-2 pauO_'j_1p
* @version 1.0 ?<J~SF Tt
*/ |K.I%B
public class ImprovedMergeSort implements SortUtil.Sort { @Mya|zb
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private static final int THRESHOLD = 10; Ifp8oL?S;
O}C*weU
/* 6EY\
* (non-Javadoc) ^4IJL",
* I!!cA?W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WReHep
*/ @CM5e!
public void sort(int[] data) { 0s8fF"$
int[] temp=new int[data.length]; :H>I`)bw
mergeSort(data,temp,0,data.length-1); /\e_B6pF<
} p63fpnH
$JOtUB{
private void mergeSort(int[] data, int[] temp, int l, int r) { y:E$n!
int i, j, k; =Fe4-B?I
int mid = (l + r) / 2; P:Q&lnC
if (l == r) dOaOWMrfdf
return; [m! P(o
if ((mid - l) >= THRESHOLD) y=Eb->a){
mergeSort(data, temp, l, mid); 3B]E2
else #+<YFm\i
insertSort(data, l, mid - l + 1); /QB;0PrE
if ((r - mid) > THRESHOLD) LmY[{.'tX
mergeSort(data, temp, mid + 1, r); Swf%WuDj
else (<.\v@7HC
insertSort(data, mid + 1, r - mid); papMC"<g$
7Tp+]"bL
for (i = l; i <= mid; i++) { }x|q*E\
temp = data; 9y[U\[H
} ;Mmu}
for (j = 1; j <= r - mid; j++) { LT)I ?ud
temp[r - j + 1] = data[j + mid]; VOYQ<tg
} ydVDjE Y
int a = temp[l]; Kf?:dF
int b = temp[r]; ;P<h9(
for (i = l, j = r, k = l; k <= r; k++) { B3yTN6-
if (a < b) { GsO(\hR6^
data[k] = temp[i++]; Z6b]EcP)#
a = temp; D\;5{,:d
} else { g'!"klS93
data[k] = temp[j--]; N*[b26
b = temp[j]; N=U`BhL_
} pq_U?_5Z'r
} <^$ppwk$
} ES^JRX
u[SqZftmO
/** e)s l
* @param data cD9U^SOS
* @param l w3VgGc~
* @param i Ugo!
*/ k{{ Y2B?C
private void insertSort(int[] data, int start, int len) { ` ,SNqi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3 [#Rm>,Vu
} P(-
} /j3",N+I
} ZJ+ad,?,
} J(8?6&=ck
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堆排序： "3++S
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package org.rut.util.algorithm.support; CL`+\ .
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import org.rut.util.algorithm.SortUtil; @#^Y# rxb
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/** /V cbT >=
* @author treeroot Jza?DhSAZ
* @since 2006-2-2 *qYw
* @version 1.0 PZ#up{[o
*/ BK)<~I
public class HeapSort implements SortUtil.Sort{ *Ej;}KSv
0nBDF79
/* (non-Javadoc) b)#rUI|O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g9;s3qXiG
*/ `gCJ[
public void sort(int[] data) { `t9k!y!GV
MaxHeap h=new MaxHeap(); g[O
h.init(data); 7K&Uu3m
for(int i=0;i h.remove(); @@-TW`G7
System.arraycopy(h.queue,1,data,0,data.length); ]ZP!y
} FSz<R*2
m8 _yorz
private static class MaxHeap{ M/lC&F(
@+~>utr
void init(int[] data){ y$di_)&g
this.queue=new int[data.length+1]; eB_r.R{
for(int i=0;i queue[++size]=data; +*`kJ)uP
fixUp(size); K;Hgq4
} 1R yE8DdP
} gH,Pz
h 2JmRO
private int size=0; ShlTMTgS
,B_tAg4~
private int[] queue; o~CEja&(
T.')XKP)1N
public int get() { !Ea9 fe
return queue[1]; 9 !UNO
} KJS-{ed
gMZ+kP`
public void remove() { _NwHT`O[
SortUtil.swap(queue,1,size--); br TP}A
fixDown(1); #*w)rGkU2
} Ahbh,U
file://fixdown {98e_z w
private void fixDown(int k) { O0 Uh
int j; k' Fu&r
while ((j = k << 1) <= size) { A)j!Wgs^z
if (j < size %26amp;%26amp; queue[j] j++; ~H
if (queue[k]>queue[j]) file://不用交换 }kItVx
break; n'q:L(`M
SortUtil.swap(queue,j,k); 5`:d$rv
k = j; Fv)E:PnKC
} g)ZMU^1
} sV5") /~
private void fixUp(int k) { yZm=#.f
while (k > 1) { 5}w
int j = k >> 1; -I6t ^$HA
if (queue[j]>queue[k]) Og@{6>
break; $`%Om WW{
SortUtil.swap(queue,j,k); NOkgG0Z
k = j; XjP;O,x
} imzPVGCD{
} u)r:0;5
h6?Z
} XR[=W(m}
E^c*x^
} f)a0!U 44
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SortUtil： QS\wtTXj
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package org.rut.util.algorithm; <HN{.p{
olL? 6)gC
import org.rut.util.algorithm.support.BubbleSort; 1ZRkVHiz0
import org.rut.util.algorithm.support.HeapSort; q &{<HcP
import org.rut.util.algorithm.support.ImprovedMergeSort; X's<+hK&
import org.rut.util.algorithm.support.ImprovedQuickSort; #pK" ^O*!
import org.rut.util.algorithm.support.InsertSort; S-Bx`e9'
import org.rut.util.algorithm.support.MergeSort; i'>5vU0?3
import org.rut.util.algorithm.support.QuickSort; )cP)HbOd=
import org.rut.util.algorithm.support.SelectionSort; 4 83rU
import org.rut.util.algorithm.support.ShellSort; 'DpJ#w\81
q{B?j%.o
/** n|rKo<Y0
* @author treeroot ~LOE^6C+~o
* @since 2006-2-2 IFS_DW
* @version 1.0 %m[ZU<v
*/ Z_S{$D
public class SortUtil { Gky^S#
public final static int INSERT = 1; 0WSZhzNyY
public final static int BUBBLE = 2; E'Ux2sh
public final static int SELECTION = 3; g3{UP]Z71
public final static int SHELL = 4; gVR]z9
public final static int QUICK = 5; k 9z9{
public final static int IMPROVED_QUICK = 6; XQfmD;U
public final static int MERGE = 7; tk=S4/VWv
public final static int IMPROVED_MERGE = 8; YOrq)_ l
public final static int HEAP = 9; 7:b.c
eMFxdtH
public static void sort(int[] data) { { %]imf|g.
sort(data, IMPROVED_QUICK); |KS,k|).
} U-m MKRV
private static String[] name={ ,5ZQPICF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )78T+7Kq
}; ]cmX f
uZJfIC<>
private static Sort[] impl=new Sort[]{ g|$;jQ\_
new InsertSort(), \M._x"
new BubbleSort(), ybJwFZ80
new SelectionSort(), NT5'U
new ShellSort(), j4#uj[A
new QuickSort(), PR$;*|@
new ImprovedQuickSort(), ^i!6z2/
new MergeSort(), v0E6i!D/
new ImprovedMergeSort(), |K-`
new HeapSort() |vGHhzZ|
}; Pgy[\t2K
6W=V8
public static String toString(int algorithm){ 7C3YVm6g
return name[algorithm-1]; R(VOHFvW6
} 2ag8?#
vxI9|i
public static void sort(int[] data, int algorithm) { Bi :!"Nw[X
impl[algorithm-1].sort(data); Q3&q%n|<
} !8cV."~
kC 6*An_f
public static interface Sort { ykPiZK
public void sort(int[] data); uh2_Rzln
} 73Jm
fCJjFL:
public static void swap(int[] data, int i, int j) { [?KGLUmTAI
int temp = data; P+|L6w*|[
data = data[j]; v*=P
data[j] = temp; h3 XSt
} 0*rD'?)K+
} b"N!#&O]