[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; W60Q3
} cb4b,Ri
int i1=l; 1{7_ `[
int i2=mid+1; F_ _H(}d
for(int cur=l;cur<=r;cur++){ mf~Lzp
if(i1==mid+1) x57'Cg \
data[cur]=temp[i2++]; -sx-7LKi
else if(i2>r) VlV)$z_
data[cur]=temp[i1++]; <%/:w/
else if(temp[i1] data[cur]=temp[i1++]; tPzM7 n|
else bCt_yR
data[cur]=temp[i2++]; 6yp+h
} W'd/dKUx
} oX#9RW/ >I
-P*xyI
} -D;lS 6
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改进后的归并排序: 7Qt2gf
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package org.rut.util.algorithm.support; jPj2
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import org.rut.util.algorithm.SortUtil; 7_1W:-A7W
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/** =s6E/K
* @author treeroot fls#LcI9>6
* @since 2006-2-2 xV?*!m$V%R
* @version 1.0 z6Fun
*/ yX3PUO9
public class ImprovedMergeSort implements SortUtil.Sort { phe"JNML
"zXGp7Q'#
private static final int THRESHOLD = 10; Ys)+9yPPn
m^5s>hUl
/* /AoVl'R
* (non-Javadoc) |zT%$
* *WD;C0?z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,v|CombIc.
*/ DqRLx85d1
public void sort(int[] data) { /!:L7@BZ
int[] temp=new int[data.length]; 6/VNuQ_#
mergeSort(data,temp,0,data.length-1); kRQ~hRT6
} xa' nJ"f;
;Sy/N||
private void mergeSort(int[] data, int[] temp, int l, int r) { S]vW&r3`
int i, j, k; 6xyY+
int mid = (l + r) / 2; FBYll[8
if (l == r) )K8P+zn~
return; dEL3?-;'
if ((mid - l) >= THRESHOLD) }FHw" {my
mergeSort(data, temp, l, mid); F ZM2
else l&vm[3
insertSort(data, l, mid - l + 1); K*0aXr?
if ((r - mid) > THRESHOLD) u0wn=Dg
mergeSort(data, temp, mid + 1, r); S3b|wUf
else umqLKf=x!
insertSort(data, mid + 1, r - mid); o; 6fvn
~v^%ze
for (i = l; i <= mid; i++) { Ri9Kr
temp = data; id3)6}
} 56"#Syj
for (j = 1; j <= r - mid; j++) { /*AJ+K._
temp[r - j + 1] = data[j + mid]; -*rHB&e
} b{zAJ`|#[n
int a = temp[l]; -3u@hp_
int b = temp[r]; ]Jja
for (i = l, j = r, k = l; k <= r; k++) { vU?b"n
if (a < b) { GJ.kkTMT
data[k] = temp[i++]; OiYNH~hv
a = temp; P\Ai|"=&]
} else { ~6\& y
data[k] = temp[j--]; Fecx';_1`
b = temp[j]; mx:J>SPA8
} 8e]z6:}'E
} 0Z@ARMCe|m
} E"G:K`Q
xX[?L9RGz
/** <Z2(qZ^Z
* @param data 1 ,#{X3
* @param l jB5>y&+
* @param i I93 ~8wQ
*/ W^5<XX,ON
private void insertSort(int[] data, int start, int len) { @^'G&%j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &G0l&8pa
} _)OA$
} 3Gc ,I:\
} $o/0A
} ~gSwxGT7d
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堆排序： YgO aZqN
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package org.rut.util.algorithm.support; fG X1y
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import org.rut.util.algorithm.SortUtil; 1M7\:te*
e} sc]MTM
/** ox!|)^`$_
* @author treeroot 0@II&
* @since 2006-2-2 yjGGqz$
* @version 1.0 %zA2%cq<
*/ A/ 7r:yO
public class HeapSort implements SortUtil.Sort{ gJ<@;O8zu0
fBHkLRFH
/* (non-Javadoc) = 4BLc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 73&]En
*/ $ /}:P
public void sort(int[] data) { 8#X?k/mzU
MaxHeap h=new MaxHeap(); Qw3a"k-
h.init(data); V}vl2o
for(int i=0;i h.remove(); k7:GS,7
System.arraycopy(h.queue,1,data,0,data.length); &&]"Y!r -
} =-OCM*5~S
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private static class MaxHeap{ "[%;B0J
ZAI1p+
void init(int[] data){ 2neF<H?^o
this.queue=new int[data.length+1]; >P<k[vF
for(int i=0;i queue[++size]=data; Ymwx(Pm
fixUp(size); Sf+(1_^`t
} zF[3%qZE:T
} 4]Un=?)I
Paae-EmC
private int size=0; )ZS:gD
K*([9VZ
private int[] queue; _7-"VoX
;J,,f1Vw
public int get() { g_rA_~dh
return queue[1]; e8~62O^
} 1?/5A|?V4+
30sC4}
public void remove() { fK)ZJ_?w,@
SortUtil.swap(queue,1,size--); y8<lp+
fixDown(1); c,6<7
} sh',"S#=@
file://fixdown &LCUoTzj
private void fixDown(int k) { 2 ||KP|5@
int j; R-g>W
while ((j = k << 1) <= size) { M!xm1-,[
if (j < size %26amp;%26amp; queue[j] j++; DiZ!c"$
if (queue[k]>queue[j]) file://不用交换 7i-W*Mb:
break; <Z\MZ&{k{*
SortUtil.swap(queue,j,k); gE-w]/1zD5
k = j; [JX}1%NA
} M9uH&CD6U
} H$k![K6Uj
private void fixUp(int k) { ?=/}Ft
while (k > 1) { zPX=MfF
int j = k >> 1; @&~OB/7B:
if (queue[j]>queue[k]) k#8S`W8^
break; j6&zRFX
SortUtil.swap(queue,j,k); G/LXUhuif
k = j; hO+O0=$}wN
} -(4E
} MFc=B`/X
!7O=<
} yS:IRI.
J[<D/WIH
} ;55tf l
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SortUtil： vWnHC
vOvxQS}dBp
package org.rut.util.algorithm; &J5-'{U|0
u7WTSL%
import org.rut.util.algorithm.support.BubbleSort; HKEop
import org.rut.util.algorithm.support.HeapSort; !#@4xeBPo
import org.rut.util.algorithm.support.ImprovedMergeSort; Xa?6#
import org.rut.util.algorithm.support.ImprovedQuickSort; )+jK0E1
import org.rut.util.algorithm.support.InsertSort; g9FVb7In_
import org.rut.util.algorithm.support.MergeSort; Ov~S2?E8
import org.rut.util.algorithm.support.QuickSort; 5CH-:|(;=
import org.rut.util.algorithm.support.SelectionSort; S`GXiwk
import org.rut.util.algorithm.support.ShellSort; C$AIP\j- )
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/** "lv:hz
* @author treeroot 1OiZNuI:E
* @since 2006-2-2 J^s<x#C
* @version 1.0 Mf%^\g.}
*/ [T.(MbP
public class SortUtil { i#M a-0#
public final static int INSERT = 1; gJcXdv=]2
public final static int BUBBLE = 2; {E3<GeHw4
public final static int SELECTION = 3; {.' ,%)
public final static int SHELL = 4; ,<^tsCI
public final static int QUICK = 5; 4t%:O4 3e
public final static int IMPROVED_QUICK = 6; t]u(jX)
public final static int MERGE = 7; 7tf81*e
public final static int IMPROVED_MERGE = 8; T;4gcJPn"M
public final static int HEAP = 9; Sob $j
= h<? /Krs
public static void sort(int[] data) { Zgy2Pot
sort(data, IMPROVED_QUICK); .qb_/#Bas
} e~>p.l
private static String[] name={ |`)V^e_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %/6e"o
}; xnhDW7m
}(g+:]p-
private static Sort[] impl=new Sort[]{ i)ES;b4
new InsertSort(), HYI1 o/}
new BubbleSort(), 764}yV>
new SelectionSort(), f>wW}-
new ShellSort(), Il&"=LooZ
new QuickSort(), S}v{^vR
new ImprovedQuickSort(), l_YdIUl
new MergeSort(), ?*z(1!
new ImprovedMergeSort(), 02J6Pn3
new HeapSort() .J1Hg
}; H(%] Os
_ \v@9Q\
public static String toString(int algorithm){ y-)+I<M
return name[algorithm-1]; a'>$88tl
} +EiUAs~H
[:R P9r}
public static void sort(int[] data, int algorithm) { ]UCk_zWsn1
impl[algorithm-1].sort(data); _#^A:a^e8
} R.2KYhp,
rmg";(I
public static interface Sort { ?{.b9`
public void sort(int[] data); 8x^H<y=O
} mtWx ?x
zfr(dQ
public static void swap(int[] data, int i, int j) { Y;> p)'z
int temp = data; g]@R'2:1
data = data[j]; Cs1%g
data[j] = temp; Nz>E#.++
} iM\ZJ6
} Y9H *S*n