[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; nJ!`^X5I
} qA4w*{JN
int i1=l; t@KN+ C
int i2=mid+1; _wa1R+`_
for(int cur=l;cur<=r;cur++){ H{Zfbb
if(i1==mid+1) ES~ykE
data[cur]=temp[i2++]; %i!&Fr
else if(i2>r) Z:Hk'|q}I
data[cur]=temp[i1++]; A"wor\(
else if(temp[i1] data[cur]=temp[i1++]; iHKWz)0
else ^j"*-)R
data[cur]=temp[i2++]; PCxv_Svf
} iqCZIahf
} dA;f`Bi;Q
%_*q'6K
} B^W0Ik`m
3GkVMYI
改进后的归并排序: |Gc2w]\3
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package org.rut.util.algorithm.support; a78&<
[I*BEJ;W'
import org.rut.util.algorithm.SortUtil; %<x2=#0
/\=syl
/** L;a>J
* @author treeroot tvH{[e$
* @since 2006-2-2 X{SD3j=G#
* @version 1.0 %xE9vN;
*/ P{ AJH1
public class ImprovedMergeSort implements SortUtil.Sort { 8$SA"c)
(+'*_
private static final int THRESHOLD = 10; iV8j(HV
* A B
/* J%ym1A9
* (non-Javadoc) dpHK~n j\_
* W~ 6ii\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t/?x#X
*/ VGLE5lP X
public void sort(int[] data) { YG<7Zv
int[] temp=new int[data.length]; }nrl2yp:%
mergeSort(data,temp,0,data.length-1); wgm?lfX<
} Y{]RhRR
Do3;-yp>`
private void mergeSort(int[] data, int[] temp, int l, int r) { -\mbrbG9H
int i, j, k; 3c<).aC0f
int mid = (l + r) / 2; Y|bCbaF
if (l == r) :-xF=Y(;
return; S<Zb>9pl
if ((mid - l) >= THRESHOLD) w!{g^*R+!
mergeSort(data, temp, l, mid); v1h*/#
else K8 Y/sHl
insertSort(data, l, mid - l + 1); U0}]3a0
if ((r - mid) > THRESHOLD) 4%#C _pE9
mergeSort(data, temp, mid + 1, r); :cv_G;?
else C^]y iR-U
insertSort(data, mid + 1, r - mid); Yrb[:;Y
W(N@`^
for (i = l; i <= mid; i++) { ZJz6{cY
temp = data; FuEgI8+b
} {}ks[%,_\
for (j = 1; j <= r - mid; j++) { /"d5<B`%
temp[r - j + 1] = data[j + mid]; m7z6c"?lB
} g0-hN%=6
int a = temp[l]; ;qT~81
int b = temp[r]; KD]8n]c
for (i = l, j = r, k = l; k <= r; k++) { Jq1 Zb
if (a < b) { !QoOL<(){
data[k] = temp[i++]; k8E'wN
a = temp; ZRYs7 4<
} else { uVJ;1H!
data[k] = temp[j--]; $Bd{Y"P@6
b = temp[j]; ]kC/b^~+m
} ^J0*]k%
} PfTjC"`,
} OA#AiQUR
mgeNH~%m@*
/** = E'\
* @param data g0w<vD`<g
* @param l $0rSb0[
* @param i W2Y%PD9a
*/ \N1G5W
private void insertSort(int[] data, int start, int len) { (Sc]dH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]wLHe2bEu
} "i$Avm
} j>s>i
} X^4HYm
} 9H5S@w[je
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堆排序： (I~-mzu\
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package org.rut.util.algorithm.support; )cc:Z7p
:4|W;Lkd!
import org.rut.util.algorithm.SortUtil; [4,=%ez
y~_wr}.CS
/** 2T!pFcc
* @author treeroot ;2K_u
* @since 2006-2-2 e=KA|"vxh
* @version 1.0 Y>z~0$
*/ Y4,~s64e
public class HeapSort implements SortUtil.Sort{ il=y m
F0 WM&{v
/* (non-Javadoc) |]`\ak
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &CW,qY,sh
*/ )&[S*g
public void sort(int[] data) { F3/aq+<P[
MaxHeap h=new MaxHeap(); $fSV8n;Y
h.init(data); l;$HGoJ
for(int i=0;i h.remove(); `9SRiy
System.arraycopy(h.queue,1,data,0,data.length); /5:C$ik
} Sw~jyUEr
xMI4*4y(
private static class MaxHeap{ g1-^@&q
D_r&B@4w
void init(int[] data){ p(/PG+
this.queue=new int[data.length+1]; F8S -H"
for(int i=0;i queue[++size]=data; Gz;.?=&iF
fixUp(size); f]H[uzsV
} iTi]D2jC
} `Y`Ujr\6
n2\;`9zm
private int size=0; _SM5x,Zd
e_6VPVa
private int[] queue; (i4=}Kn2
.XR`iXY
public int get() { YX38*Ml+V
return queue[1]; dXgj
} ML?%s`
e W&;r&26
public void remove() { gZ6]\l]J{
SortUtil.swap(queue,1,size--); uev$5jlX
fixDown(1); o9-b!I2
} )`?Es8uW
file://fixdown +$M%"=tk
private void fixDown(int k) { qQC<oR
int j; E,,)?^g
while ((j = k << 1) <= size) { :eqDEmr>
if (j < size %26amp;%26amp; queue[j] j++; \"BoTi'2!
if (queue[k]>queue[j]) file://不用交换 isK~=
break; C=L_@{^Rgb
SortUtil.swap(queue,j,k); .ky((
k = j; z+5l:f
} ~[bS+]d!
} i{zg{$U
private void fixUp(int k) { (6i)m c(
while (k > 1) { F/z$jj)
int j = k >> 1; (h>Jz
if (queue[j]>queue[k]) .8[B }S(
break; ')%Kv`hz
SortUtil.swap(queue,j,k); %O-RhB4q
k = j; iQsv^K!\
} W,~s0a!
} -:IG{3fnu
VF1)dd
} +#~=QT9
>}{'{ Z &
} g'G%BX
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SortUtil： Q*|O9vu'D
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package org.rut.util.algorithm; J9J[.6k8
/HR9(j6
import org.rut.util.algorithm.support.BubbleSort; Zp~2WJQ
import org.rut.util.algorithm.support.HeapSort; tpw0j CVu
import org.rut.util.algorithm.support.ImprovedMergeSort; &>kklP
import org.rut.util.algorithm.support.ImprovedQuickSort; #;GIvfW
import org.rut.util.algorithm.support.InsertSort; /rp.H'hC
import org.rut.util.algorithm.support.MergeSort; Gxk=]5<7
import org.rut.util.algorithm.support.QuickSort; .U|e#t
import org.rut.util.algorithm.support.SelectionSort; {H OvJ`tM
import org.rut.util.algorithm.support.ShellSort; yyZ}qnbx]
Bs2.$~
/** oK1"8k|Z
* @author treeroot yGl (QLk
* @since 2006-2-2 v#u]cmI
* @version 1.0 vaQZ1a,
*/ HPVW2Y0_N
public class SortUtil { o3*IfD
public final static int INSERT = 1; (3z: ;
public final static int BUBBLE = 2; 9!sx
public final static int SELECTION = 3; jR<yV
public final static int SHELL = 4; `M?C(
public final static int QUICK = 5; c|q!C0X[
public final static int IMPROVED_QUICK = 6; - Z?rx5V;t
public final static int MERGE = 7; ldcYw@KQ
public final static int IMPROVED_MERGE = 8; }}Ah-QU
public final static int HEAP = 9; seWYY $$
]Hk8XT@Q+
public static void sort(int[] data) { <4s$$Uw}6%
sort(data, IMPROVED_QUICK); NQefrof
} 3vTX2e.w
private static String[] name={ IE*GF27n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oL0Q%_9hW
}; \z!*)v/{-
is&A_C7yg
private static Sort[] impl=new Sort[]{ s6<`#KFAg
new InsertSort(), UEmNT9V
new BubbleSort(), S^|Uzc
new SelectionSort(), Y~]E6'Bz
new ShellSort(), 3f9J!B`n
new QuickSort(), cQDn_Sjhi
new ImprovedQuickSort(), rq'Cj<=Zj
new MergeSort(), )2T?Z)"hO
new ImprovedMergeSort(), V~-<VM6
new HeapSort() hY=#_r8
}; "orZje9AC
cQEK>aAd
public static String toString(int algorithm){ AP.WTFf
return name[algorithm-1]; NyU~8?bp
} hPtSY'_@_
z:f[<`,GT
public static void sort(int[] data, int algorithm) { tK)E*!
impl[algorithm-1].sort(data); *k'D%}N:
} <%klrQya
vUBkoC2Q
public static interface Sort { !f\,xa|M
public void sort(int[] data); %Y8#I3jVJ
} q,-bw2
xEtzqP<]
public static void swap(int[] data, int i, int j) { 3DRbCKNL
int temp = data; tj 6 #lM9
data = data[j]; ^G'8!!ys
data[j] = temp; (!kOM% 3{
} KB+,}7
} !`S?