[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; ="p,~ivrz
} aT4I sPA?_
int i1=l; 9dVHh?E
int i2=mid+1; lvAKL>qX
for(int cur=l;cur<=r;cur++){ E3LEeXcLS
if(i1==mid+1) %W}YtDf\
data[cur]=temp[i2++]; &w!(.uDO
else if(i2>r) ;fW`#aE
data[cur]=temp[i1++]; BOflhoUX
else if(temp[i1] data[cur]=temp[i1++]; y(ceEV
else 23d*;ri5
data[cur]=temp[i2++]; redMlHM
} S awf]/
} xX?9e3(
d>gQgQ;g
} r>#4Sr
!J&UO/q.
改进后的归并排序: IG.!M@_
}y1r yeW<
package org.rut.util.algorithm.support; .[r1Qz7G
1l5'N=hL
import org.rut.util.algorithm.SortUtil; c(b2f-0!4
l(Ya,/4
/** s !IvUc7'
* @author treeroot 8e5imei
* @since 2006-2-2 W(}2R>$
* @version 1.0 b*(,W
*/ -x{@D{Q%
public class ImprovedMergeSort implements SortUtil.Sort { ,. zHG
I`77[
private static final int THRESHOLD = 10; 6d`qgEM3
XXw>h4hl
/* NQxx_3*4O
* (non-Javadoc) 8d?%9# p-)
* [Kg3:]2A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) URbHVPCPb
*/ -FF#+Z$
public void sort(int[] data) { n8E3w:A-
int[] temp=new int[data.length]; +B[XTn,Cru
mergeSort(data,temp,0,data.length-1); Q#F9&{'l
} ce3``W/H3
}uwZS=pw
private void mergeSort(int[] data, int[] temp, int l, int r) { 3*T/ 7\
int i, j, k; U2)?[C1q{
int mid = (l + r) / 2; g"~`\xhx
if (l == r) F}.R-j#
return; ;}lsD1S:
if ((mid - l) >= THRESHOLD) Q@"}v_r4
mergeSort(data, temp, l, mid); )<%CI#s#
else 7z_ZD0PxPc
insertSort(data, l, mid - l + 1); YSzC's[
if ((r - mid) > THRESHOLD) rB-R(2 CCN
mergeSort(data, temp, mid + 1, r); N1}r%!jk/
else @QMU$]&i]
insertSort(data, mid + 1, r - mid); 8=@f lK
NFyV02.
for (i = l; i <= mid; i++) { NoMlTh(O
temp = data; p"7]zq]'
} O=vD6@QI
for (j = 1; j <= r - mid; j++) { 6i;q=N$'
temp[r - j + 1] = data[j + mid]; Zt& 7p
} {Mb2X^@7
int a = temp[l]; bXvriQ.UH
int b = temp[r]; EERCb%M8Z
for (i = l, j = r, k = l; k <= r; k++) { !UR3`Xk
if (a < b) { JqUft=p5
data[k] = temp[i++]; U'^ G-@
a = temp; Q;ZV`D/FA
} else { ?\I@w4
data[k] = temp[j--]; ._]*Y`5)d
b = temp[j]; '0^lMQMg
} odDVdVx0
} 6B]i}nFH{+
} 6-~ZOMlV
>7)QdaB
/** rmi&{o:
* @param data R_9M-RP6*
* @param l ]*U+nG
* @param i G5|'uKz2"
*/ 62kA(F0e,
private void insertSort(int[] data, int start, int len) { XTA:Y7"O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #]QS
} V*r/0|vd
} }+}Cl T
} Ga+Cb2$
} Z<W f/
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堆排序： i1X!G|Awfv
L8f_^ *,
package org.rut.util.algorithm.support; z}iz~WZ
<>(v~a]
import org.rut.util.algorithm.SortUtil; M1]w0~G
VeqB/QX
/** P^ht$)Y
* @author treeroot k.})3~F-
* @since 2006-2-2 nltOX@P-
* @version 1.0 U\W$^r,
*/ 1cx%+-
public class HeapSort implements SortUtil.Sort{ XZQ-Ig18
m^zD']
/* (non-Javadoc) ;pS+S0U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?&!!(dWFH
*/ ++UxzUd
public void sort(int[] data) { FRL;fF
MaxHeap h=new MaxHeap(); t\]kVo)
h.init(data); 'SXLnoeTa
for(int i=0;i h.remove(); ;1s;"
System.arraycopy(h.queue,1,data,0,data.length); Vx:uqzw#
} I?nU+t;
6kMEm)YjT
private static class MaxHeap{ 3sRI7g
,S m?2<
void init(int[] data){ _dECAk &b
this.queue=new int[data.length+1]; |9F-ZH~6
for(int i=0;i queue[++size]=data; ZFh[xg'0
fixUp(size); _j4K
} +K8T%GAr
} (uX"n`Dk
S|;}]6p
private int size=0; GY5JPl
xOr"3;^
private int[] queue; O>I%O^
=(~*8hJ
public int get() { a^^OI|?
return queue[1]; {u0sbb(
} <WbO&;%
S;/pm$?/
public void remove() { !]9qQ7+R%
SortUtil.swap(queue,1,size--); yRDtPK"E-
fixDown(1); O'(D:D?
} OlptO60{ ]
file://fixdown D+N@l"U{
private void fixDown(int k) { _RS CyV
int j; fGW~xul_
while ((j = k << 1) <= size) { Ic^ (6
if (j < size %26amp;%26amp; queue[j] j++; .Wi%V"
if (queue[k]>queue[j]) file://不用交换 ,,1y0s0`
break; (w+SmD
SortUtil.swap(queue,j,k); 7<L!" 2VB
k = j; !s !el;G
} :o87<) _F
} +;*4.}
private void fixUp(int k) { ^jcVJpyT@R
while (k > 1) { "Er8RUJA
int j = k >> 1; "HwlN_PA
if (queue[j]>queue[k]) ;5
break; :T>OJ"p
SortUtil.swap(queue,j,k); i7rk%q
k = j; n<@C'\j@
} KxBvL[/
} xX0wn?,~
{iCX?Sb
} ?%lfbZ
Qs?p)3qp
} pAaNWm
ooCfr?E
SortUtil： ~ 588md :
* bhb=~
package org.rut.util.algorithm; [jxh$}?P
]GsI|se
import org.rut.util.algorithm.support.BubbleSort; G)f!AuN=
import org.rut.util.algorithm.support.HeapSort; !aJ6Uf%R
import org.rut.util.algorithm.support.ImprovedMergeSort; G8MLg#
import org.rut.util.algorithm.support.ImprovedQuickSort; 0-uVmlk=/
import org.rut.util.algorithm.support.InsertSort; \IEuu^
import org.rut.util.algorithm.support.MergeSort; |oePB<N
import org.rut.util.algorithm.support.QuickSort; \@T;/Pj{[
import org.rut.util.algorithm.support.SelectionSort; g $^Yv4
import org.rut.util.algorithm.support.ShellSort; -s7!:MB%g
U-$nwji
/** #;+SAoN
* @author treeroot !w0=&/Y{R
* @since 2006-2-2 yn20*ix{
* @version 1.0 *y` (^kyS
*/ kw7E<aF!
public class SortUtil { U'~]^F%eyu
public final static int INSERT = 1; m( %PZ*s
public final static int BUBBLE = 2; (/9erfuJ
public final static int SELECTION = 3; Mhb~wDQl
public final static int SHELL = 4; (^_INy*
public final static int QUICK = 5; [r9HYju=
public final static int IMPROVED_QUICK = 6; : w>R|]
public final static int MERGE = 7; R((KAl]dL
public final static int IMPROVED_MERGE = 8; i=hA. y`
public final static int HEAP = 9; NO/5pz}1
zz<o4bR
public static void sort(int[] data) { T-x9IoE
sort(data, IMPROVED_QUICK); l1 _"9a%H
} ux17q>G
private static String[] name={ RMid}BRE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DK'S4%;Sp
}; \C2HeA\#SW
Gv[(0
private static Sort[] impl=new Sort[]{ Y:Jgr&*,z
new InsertSort(), P?jI:'u!R.
new BubbleSort(), NF-@Q@
new SelectionSort(), 4af^SZ)l
new ShellSort(), J$T(p%
new QuickSort(), G,1g~h%I$
new ImprovedQuickSort(), }I#_H
new MergeSort(), Cy)QS{YX
new ImprovedMergeSort(), wSdiF-ue
new HeapSort() O*n@!ye
}; l%?()]y
9%0^fhrJ
public static String toString(int algorithm){ KFaYn
return name[algorithm-1]; |@f\[v9`
} ICc:k%wE7
1CJAFi>%D
public static void sort(int[] data, int algorithm) { mgodvX
impl[algorithm-1].sort(data); SP>&+5AydX
} )t:8;;W@Ir
=rkW325O
public static interface Sort { ~at:\h4:
public void sort(int[] data); nyOmNvZf
} i'1MZ%.
/#q6.du
public static void swap(int[] data, int i, int j) { +Z=y/wY
int temp = data; ,Vof<,x0
data = data[j]; 'e$8 IZm
data[j] = temp; ()n2 KT
} 41Ab,
} M7-2;MZ