[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; 8Ry74|`=R
} 6 \B0^
int i1=l; 2cu#lMq
int i2=mid+1; (wc03,K^
for(int cur=l;cur<=r;cur++){ m8623DB"
if(i1==mid+1) fAZiC+
data[cur]=temp[i2++]; JO14KY*%
else if(i2>r) |%~+2m
data[cur]=temp[i1++]; 39{{7(hh
else if(temp[i1] data[cur]=temp[i1++]; I *c;H I
else 4[ryKPa,
data[cur]=temp[i2++]; ~}Z\:#U
} Oo?,fw
} = sAn,ri
?}Z1(it0
} \b[9ebME
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改进后的归并排序: ~_9"3,~o5
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package org.rut.util.algorithm.support; [6jbgW~E
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import org.rut.util.algorithm.SortUtil; 8\<jyJ
,? E&V_5
/** c= UU"
* @author treeroot _DRrznaw
* @since 2006-2-2 2?Ye*-
* @version 1.0 l0*Gb
*/ t+CWeCp,
public class ImprovedMergeSort implements SortUtil.Sort { ;0ME+]`"3
\EbbkN:D
private static final int THRESHOLD = 10; %/kyT%1
^EVc95|Z
/* Q5S,{ ZeT
* (non-Javadoc) ]L2Oz
* h72UwJ2rw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FDR1Gy
*/ wHz?#MW 3L
public void sort(int[] data) { xChI,~i
int[] temp=new int[data.length]; R)!`JKeO/
mergeSort(data,temp,0,data.length-1); Dj-s5pAW
} N132sN2
'#\D]5
private void mergeSort(int[] data, int[] temp, int l, int r) { $#o1MX
int i, j, k; OLq 0V3m
int mid = (l + r) / 2; Z.&\=qiY
if (l == r) b syq*
return; ETv9k g
if ((mid - l) >= THRESHOLD) H;<!TX.zD
mergeSort(data, temp, l, mid); TOl}U
else B%<e FFV\
insertSort(data, l, mid - l + 1); Hr;h4J
if ((r - mid) > THRESHOLD) Z\X'd_1!
mergeSort(data, temp, mid + 1, r); Bt^K]F\
else 9-h.|T2il
insertSort(data, mid + 1, r - mid); i~=s^8n`l
OKuD"
for (i = l; i <= mid; i++) { +R$?2
temp = data; ed~R>F>
} ,W5.:0Y;f[
for (j = 1; j <= r - mid; j++) { upn8n vy4(
temp[r - j + 1] = data[j + mid]; 1uG=`k8'k
} O]u",J5
int a = temp[l]; :,]S}R
int b = temp[r]; u7]<=*V]
for (i = l, j = r, k = l; k <= r; k++) { jThbeY[
if (a < b) { Wz=OSH7"f
data[k] = temp[i++]; B5=3r1Ly
a = temp; RpQ*!a~O
} else { vX1uR]A[
data[k] = temp[j--]; }*;EFR6'
b = temp[j]; Hw_o w?
} \tt'm\_
} Jgx8-\8
} D(Ix!G/
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/** (9.yOc4
* @param data l:e9y$_)
* @param l $+VgDe5{S
* @param i ??xlA-E
*/ MQw9X
private void insertSort(int[] data, int start, int len) { Lo3-X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jn=ug42d
} 19y 0$e_V
} |^5/(16
} #tz8{o?ebN
} _ VKgs]Y
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堆排序： # cWHDRLX
h;Mu[`
package org.rut.util.algorithm.support; Q_lu`F|
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import org.rut.util.algorithm.SortUtil; 6o lV+
u8uW9 <
/** y9 uVCR
* @author treeroot D0M!"c>\
* @since 2006-2-2 wiV&xl
* @version 1.0 &wGg6$
*/ '5WN,Vy8.
public class HeapSort implements SortUtil.Sort{ kgc.8
M)=|<h"F
/* (non-Javadoc) `i4I!E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PJwEA
*/ _W+Q3Jx-(
public void sort(int[] data) { S-,kI
MaxHeap h=new MaxHeap(); '}zT1F* p=
h.init(data); MgP{W=h2
for(int i=0;i h.remove(); n2;(1qr
System.arraycopy(h.queue,1,data,0,data.length); 0# UAjT3
} ;qG1r@o
>0M:&NMda
private static class MaxHeap{ wy\o*P9mG)
Zih5/I
void init(int[] data){ e@+v9Bs]q
this.queue=new int[data.length+1]; aKOf;^@
for(int i=0;i queue[++size]=data; B{4"$Mi
fixUp(size); JOgmF_(>Z
} "?+UI
} Yoe les-
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private int size=0; yI *M[0
Nq U9/
private int[] queue; {;;eOxOP|
8}J(c=4Gk
public int get() { d^_itC;-,
return queue[1]; YBeZN98Nt
} 'bG1U`v=3
;7)OSGR
public void remove() { a\Tr!Be,
SortUtil.swap(queue,1,size--); @!,D%]8"
fixDown(1); m_~y
} :Z]/Q/$
file://fixdown EqYz,%I%
private void fixDown(int k) { @t "~
int j; \(wn@/yP'
while ((j = k << 1) <= size) { !+%Az*ik
if (j < size %26amp;%26amp; queue[j] j++; %oMWcgsdJi
if (queue[k]>queue[j]) file://不用交换 -.^=Z!=M
break; YcEtgpz@
SortUtil.swap(queue,j,k); *C tsFS~
k = j; tc!!W9{69
} t.gq5Y.[
} eR(\s_`
private void fixUp(int k) { m`[oT\
while (k > 1) { C8!8u?k
int j = k >> 1; k{zs578h2
if (queue[j]>queue[k]) 0@JilGk1u
break; ~r{\WZ.
SortUtil.swap(queue,j,k); G*8+h
k = j; 'nC3:U
} TB;3`
} hwEZj`9
f%`*ba"v
} TW'E99wG
{d&X/tT
} >_|Z{:z]d.
6~:W(E}
SortUtil： >DPds~k
8<E!rn-
package org.rut.util.algorithm; muK'h`
YlZYS'_
import org.rut.util.algorithm.support.BubbleSort; CwTS/G
import org.rut.util.algorithm.support.HeapSort; ZX~>uf\n
import org.rut.util.algorithm.support.ImprovedMergeSort; >C*?17\
import org.rut.util.algorithm.support.ImprovedQuickSort; )x_W&*oZ
import org.rut.util.algorithm.support.InsertSort; krEH`f
import org.rut.util.algorithm.support.MergeSort; {<''OwQF~+
import org.rut.util.algorithm.support.QuickSort; ,v$2'm)V
import org.rut.util.algorithm.support.SelectionSort; j]@x Q,y
import org.rut.util.algorithm.support.ShellSort; A{DIp+
}a #b$]Y
/** !q7;{/QM6
* @author treeroot e]dPF[?7
* @since 2006-2-2 }"g21-T^
* @version 1.0 Z>>gXh<e[
*/ !4qps$p{
public class SortUtil { `g4Ekp'Rp[
public final static int INSERT = 1; P ],)
public final static int BUBBLE = 2; onWYT}c{
public final static int SELECTION = 3; q>D4ma^
public final static int SHELL = 4; kB$,1J$q
public final static int QUICK = 5; z1{E:~f
public final static int IMPROVED_QUICK = 6; m-Z'K_oQ
public final static int MERGE = 7; ecSdU>
public final static int IMPROVED_MERGE = 8; N>cp>&jV
public final static int HEAP = 9; @Le ^-v4
Sug~FV?k$e
public static void sort(int[] data) { Q)%8NVs
sort(data, IMPROVED_QUICK); s$DT.cvO
} pZ@W6}
private static String[] name={ k Nf!j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R.T?ZF
}; k?|F0e_
w ufKb.4`
private static Sort[] impl=new Sort[]{ *'`3]!A
new InsertSort(), a\[fC=]r:
new BubbleSort(), ZhJ|ZvJ
new SelectionSort(), ,,C~j`F
new ShellSort(), $Kw"5cm
new QuickSort(), 56O<CgJF<
new ImprovedQuickSort(), 9rf|r 3
new MergeSort(), DoCQFSL
new ImprovedMergeSort(), yw3U"/yw
new HeapSort() zx]M/=7,V#
}; A0N ;VYv
$nD k mKl
public static String toString(int algorithm){ |\r\i&|g1
return name[algorithm-1]; l<)JAT;P
} FDGKMGZ
Zkb,v!l
public static void sort(int[] data, int algorithm) { ['N#aDh.?
impl[algorithm-1].sort(data); ,9l!fT?iH
} YWBP'Mo
+[l{C+p
public static interface Sort { bM3'm$34
public void sort(int[] data); MgK(gL/&[
} s)&R W#:X
<812V8<!
public static void swap(int[] data, int i, int j) { =L; n8~{@y
int temp = data; h|/*yTuN.y
data = data[j]; qI%9MI;BV
data[j] = temp; xyJgHbml
} #(Yb lY
} o _,$`nEJ