[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; ^K`Vqo
} %xhA2
int i1=l; @zAav>
int i2=mid+1; K %Qj<{)
for(int cur=l;cur<=r;cur++){ Nd;,Wz]
if(i1==mid+1) ,e!9WKJ B
data[cur]=temp[i2++]; 3W.5[;}
else if(i2>r) k!= jO#)Rd
data[cur]=temp[i1++]; 5#hsy;q;[
else if(temp[i1] data[cur]=temp[i1++]; jgd^{!
else 2kV{|`1
data[cur]=temp[i2++]; bbAJ5EqL
} j hrpS
} ns`njx}C
m8C scCZ}
} ^:64(7
uZkh.0yB
改进后的归并排序: _MST8
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package org.rut.util.algorithm.support; $hE,BeQ
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import org.rut.util.algorithm.SortUtil; NI33lp$V
XR.Sm<A[
/** 026|u|R
* @author treeroot $<v{$UOh
* @since 2006-2-2 $5S/~8g(
* @version 1.0 ?^3Q5ye
*/ HqKI|^
public class ImprovedMergeSort implements SortUtil.Sort { {Tl|>\[P
j/*4Wj[
private static final int THRESHOLD = 10; Q=T/hb
wTK>U`o
/* {((|IvP`
* (non-Javadoc) aFtL_# U
* a?5R;I B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }`*DMI;-
*/ `vj"HhC
public void sort(int[] data) { z3Ro*yJU
int[] temp=new int[data.length]; <Q|(dFr`v
mergeSort(data,temp,0,data.length-1); 5Ff1x-lQ
} v dR6y
RY9h^q*
private void mergeSort(int[] data, int[] temp, int l, int r) { FNB4YZ6
int i, j, k; aK4ZH}XHE"
int mid = (l + r) / 2; ``9`Xq
if (l == r) =BNS3W6
return; A@qwD300Vo
if ((mid - l) >= THRESHOLD) <Z58"dg.5
mergeSort(data, temp, l, mid); +tSfx
else 1 wB2:o<
insertSort(data, l, mid - l + 1); HA W57N
if ((r - mid) > THRESHOLD) xXn2M*g
mergeSort(data, temp, mid + 1, r); P K9BowlW
else Ki{]5Rz
insertSort(data, mid + 1, r - mid); 'H.,S_v1x
$9m>(b/;n
for (i = l; i <= mid; i++) { ?84B0K2Ns
temp = data; $TR#-q
} V-.Nc#
for (j = 1; j <= r - mid; j++) { D8,V'n>L
temp[r - j + 1] = data[j + mid]; d-BUdIz
} OZed+t=
int a = temp[l]; $(JB"%S8c
int b = temp[r]; 9m:G8j'
for (i = l, j = r, k = l; k <= r; k++) { t!JD]j>q
if (a < b) { (TQhO$,
data[k] = temp[i++]; C#Y_La
a = temp; u~VvGLFf5,
} else { c"x-_Uk
data[k] = temp[j--]; 8 DE%ot
b = temp[j]; "Oj2B|:s&
} 6-vQQ-\
} - BE.a<
} &ytnoj1L(
=%IBl]Z!"
/** cc_v4d{x
* @param data gHe%N?'
* @param l QGI_aU
* @param i VGtKW kVH
*/ jUg.Y98
private void insertSort(int[] data, int start, int len) { \$%q<_l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u/g4s (a
} }8,[B50
} ;&8
} +K"8Q'&t
} LA%t'n h
i<uWLhgh1$
堆排序： SB}0u=5
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package org.rut.util.algorithm.support; +M %zOX/
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import org.rut.util.algorithm.SortUtil; %\ef Mhn
ghu8Eg,Y
/** yB~`A>~M
* @author treeroot =n73bm
* @since 2006-2-2 etk@ j3#
* @version 1.0 0X'2d
*/ ;\[el<Y)s
public class HeapSort implements SortUtil.Sort{ Ja(>!8H>@
[sF z ;Py]
/* (non-Javadoc) z0Bw+&^]}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NL76 jF
*/ 5Dv;-G;
public void sort(int[] data) { h%yw'?s
MaxHeap h=new MaxHeap(); T~"T%r
h.init(data); d9>k5!
for(int i=0;i h.remove(); C\WU<!
System.arraycopy(h.queue,1,data,0,data.length); ;DXcEzV
} IS9}@5`'
$&l} ABn
private static class MaxHeap{ \Rff3$
Yo$NE
void init(int[] data){ L dyTB@
this.queue=new int[data.length+1]; %:~LU]KX
for(int i=0;i queue[++size]=data; ~=xS\@UY =
fixUp(size); ?!$uMKyt
} >lg-j-pV
} O?I~XM'S
">V.nao
private int size=0; TtZ '~cGR
bw\a\/Dw
private int[] queue; eJv_`#R&Of
Q\ AM] U
public int get() { D3BNA]P\2@
return queue[1]; f6d:5 X_
} n,+/%IZ
`*`@ro
public void remove() { MsL*\)*s
SortUtil.swap(queue,1,size--); aOr'OeG(=e
fixDown(1); F7r!zKXZ
} 0M^v%22
file://fixdown xct{Tv[FO
private void fixDown(int k) { y:>'1"2`
int j; @! gJOy
while ((j = k << 1) <= size) { Hi{1C"%
if (j < size %26amp;%26amp; queue[j] j++; (E.,kcAJ
if (queue[k]>queue[j]) file://不用交换 OE4hGxG
break; }#3'72
SortUtil.swap(queue,j,k); <E`Ygac
k = j; ,( ?q
} OE=]/([
} A_mVe\(*M
private void fixUp(int k) { $aFCe}3b<
while (k > 1) { >#Obhs|S{C
int j = k >> 1; r- :u*
if (queue[j]>queue[k]) 8LMO2Wyq
break; uIO<6p)
SortUtil.swap(queue,j,k); }{(dG7G+
k = j; 1oSrhUTy
} $%3"@$
} ? !dy
tf5h/:
} {M.OOEcIp
rrSsQq
} (<"uV%1
S3G9/
SortUtil： \9%SR~
&H`AS6
package org.rut.util.algorithm; %FDv6peH
N`JkEd7TT
import org.rut.util.algorithm.support.BubbleSort; %%dQIlF
import org.rut.util.algorithm.support.HeapSort; aU)NbESu
import org.rut.util.algorithm.support.ImprovedMergeSort; =y$|2(6
import org.rut.util.algorithm.support.ImprovedQuickSort; :'pLuN
import org.rut.util.algorithm.support.InsertSort; #9a\Ab
import org.rut.util.algorithm.support.MergeSort; 7t@r}rC,K
import org.rut.util.algorithm.support.QuickSort; v|&Nh?r
import org.rut.util.algorithm.support.SelectionSort; hPP,D\#
import org.rut.util.algorithm.support.ShellSort; []vt\I ;
*&d>Vk."]
/** Nzo;j0 [
* @author treeroot `|Wu\X
* @since 2006-2-2 B`)gXqBt
* @version 1.0 VJeoO)<j
*/ _shoh
public class SortUtil { BXCB/:0
public final static int INSERT = 1; r^m8kYezQ
public final static int BUBBLE = 2; `k 5'nnyP
public final static int SELECTION = 3; d3nMeAI AO
public final static int SHELL = 4; 8)wxc1
public final static int QUICK = 5; FKX+ z
public final static int IMPROVED_QUICK = 6; yFYFFv\?
public final static int MERGE = 7; z;dFS
public final static int IMPROVED_MERGE = 8; 3Dd"qON!
public final static int HEAP = 9; ZJ$nHS?ra
;!ICLkc$
public static void sort(int[] data) { DaN=NURDV
sort(data, IMPROVED_QUICK); 4DYa~ =w
} KXQ &u{[<
private static String[] name={ 7j ]d{lD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O)$rC
}; N}j]S{j}'
-8r';zR
private static Sort[] impl=new Sort[]{ &7i o/d\/
new InsertSort(), s?:&#
new BubbleSort(), c,K)*HB
new SelectionSort(), Zt;dPYq>
new ShellSort(), PLkwtDi+&
new QuickSort(), .;1tu+S
new ImprovedQuickSort(), *Va;ra(V2
new MergeSort(), =Ts3O0"[
new ImprovedMergeSort(), a+U^mPe
new HeapSort() *CIR$sS
}; |B<;4ISaRI
BkP'b{z|
public static String toString(int algorithm){ nD8 Qeem@
return name[algorithm-1]; iB]xYfQ&@V
} lhx"<kR4
. paA0j
public static void sort(int[] data, int algorithm) { 1kd\Fq^z$
impl[algorithm-1].sort(data); ]WsQ=
} ]~Su
Aa.eu=@I
public static interface Sort { *t)Y@=k3>
public void sort(int[] data); J@Qt(rRxi
} SWX[|sjdB
l8XgzaW
public static void swap(int[] data, int i, int j) { PQkFzyk
int temp = data; 1[; 7Ay
data = data[j]; [{i"Au]
data[j] = temp; )2tDX=D
} #K:!s<_"
} WS!:w'rzr