[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; .A6lj).:
} tmJgm5v
int i1=l; hoQ7).>
int i2=mid+1; BFVAw
for(int cur=l;cur<=r;cur++){ r-IT(DzkD
if(i1==mid+1) s-*._;
data[cur]=temp[i2++]; "e6|"w@8
else if(i2>r) iiG f'@/
data[cur]=temp[i1++]; fD4ICO@
else if(temp[i1] data[cur]=temp[i1++]; syPWs57pH
else .lNs4e
data[cur]=temp[i2++]; jb[!E^'&>
} `/nM[
} DCQ^fZ/
` ;)ZGY\
} Jblj^n?Bm
MCc$TttaVz
改进后的归并排序: k?6z_vu
6!q#x[A
package org.rut.util.algorithm.support; [/ M`
Hkd^-=]]no
import org.rut.util.algorithm.SortUtil; "TS
?okx<'"[
/** WYrI|^[>
* @author treeroot ]zfG~^.
* @since 2006-2-2 o)Z=m:t,lK
* @version 1.0 5x8+xw3Eh
*/ #1.YKo
public class ImprovedMergeSort implements SortUtil.Sort { {ZsdLF#
v2+!1r7@
private static final int THRESHOLD = 10; %Ym^{N
9QC.TG@
/* c#/H:?q?a
* (non-Javadoc) V5`^Y=X(%
* &M/>tEZ)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M@Q3M(z
*/ ZD>a>]
public void sort(int[] data) { qe$^q
int[] temp=new int[data.length]; ciQZHH2
mergeSort(data,temp,0,data.length-1); ^|MjJsn
} Q{g;J`Z)p
h"+ `13
private void mergeSort(int[] data, int[] temp, int l, int r) { MV>$BW
int i, j, k; ]3iH[,KU3
int mid = (l + r) / 2; Jc6R{C
if (l == r) ?.=}pAub
return; |JF@6
if ((mid - l) >= THRESHOLD) .L6Zm U
mergeSort(data, temp, l, mid); Z{6kWA3Kk
else % ps$qB'
insertSort(data, l, mid - l + 1); WjSc/3Qy
if ((r - mid) > THRESHOLD) "Z=5gj
mergeSort(data, temp, mid + 1, r); 6NWn(pZ]p
else _~u2: yl(
insertSort(data, mid + 1, r - mid); ZraT3
)!BsF'uVQ
for (i = l; i <= mid; i++) { SQ*k =4*r
temp = data; 4LH[4Yj?`
} e4>"92hX
for (j = 1; j <= r - mid; j++) { *J|(jdu7
temp[r - j + 1] = data[j + mid]; <[:o !$
} ?:{sH#ua
int a = temp[l]; RDqFL.-S
int b = temp[r]; tCG76LH
for (i = l, j = r, k = l; k <= r; k++) { t"072a
if (a < b) { \daZk/@
data[k] = temp[i++]; 1BHG'y
a = temp; y !$alE
} else { VZ& A%UFC
data[k] = temp[j--]; '(GiF
b = temp[j]; .xhK'}l[
} $Fkaa<9;P
} .iMN,+qP
} #>=j79~
'G\XXf%J
/** C)'q QvA
* @param data ` |IUGz
* @param l r}#\BbCv;7
* @param i z!;1i[|x
*/ BVsD( @lX
private void insertSort(int[] data, int start, int len) { fA/m1bYxg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (Rt7%{*
} o2z]dTJ}o
} [u}(57DS
} 2%RNq<{Z_
} zmj"fN{\
t\P<X^d%
堆排序： *Xo]-cKL0
(+uj1z^
package org.rut.util.algorithm.support; tGA :[SP
[r+ZE7$2b"
import org.rut.util.algorithm.SortUtil; hpTDxh'?$C
:cu#V
/** Twn4lG4~
* @author treeroot .itw04Uru
* @since 2006-2-2 toN^0F?Qm
* @version 1.0 H~ZV*[A`
*/ sGh(#A0Pt
public class HeapSort implements SortUtil.Sort{ Y!iZW
z#BR5jF
/* (non-Javadoc) }_=eT]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JSh.]j<bJL
*/ WJ<^E"^
public void sort(int[] data) { !EUan
MaxHeap h=new MaxHeap(); Bqma\1cgb
h.init(data); W>-Et7&2
for(int i=0;i h.remove(); A_Frk'{qhB
System.arraycopy(h.queue,1,data,0,data.length); .EM`.
} bR@p<;G|
]smkTo/
private static class MaxHeap{ qC F5~;7
[Nn`l,
void init(int[] data){ }neY<{z
this.queue=new int[data.length+1]; @(r/dZc
for(int i=0;i queue[++size]=data; hI9
fixUp(size); >pUtwIP
} =UyLk-P w
} jw-0M1B
PkI:*\R
private int size=0; 87hq{tTs]
&0f5:M{P
private int[] queue; vfVj=DYj
8@so"d2e
public int get() { y;/VB,4V
return queue[1]; #o1=:PQaC
} : ]C~gc
RKPO#qju\F
public void remove() { Ua!aaq&
SortUtil.swap(queue,1,size--); 6@DF
fixDown(1); fb^fVSh>
} ]_N|L|]M
file://fixdown 95el'K[R
private void fixDown(int k) { )"Ztlhs`#
int j; d!eYqM7-G
while ((j = k << 1) <= size) { "DYJ21Ut4
if (j < size %26amp;%26amp; queue[j] j++; U&O: _>~
if (queue[k]>queue[j]) file://不用交换 N-lkYL-%\j
break; sr8cYLm5R
SortUtil.swap(queue,j,k); ]U"94S U:)
k = j; bhniB@<
} 13taFVdU
} {<<U^<6}
private void fixUp(int k) { 1GzAG;UUo6
while (k > 1) { ,v"YqD+GC5
int j = k >> 1; 6Ybg^0m
if (queue[j]>queue[k]) T=ev[ mS
break; W6Y]N/v3>
SortUtil.swap(queue,j,k); JtER_(.
k = j; |\pbir
} #U14-^7
} 3Z1CWzq(
`V##Y
} .V,@k7U,V
41&\mx
} p,#o<W
ob8qe,_'
SortUtil： 4:FK;~wM&x
;+"+3
package org.rut.util.algorithm; \ Yx/(e
%7|9sQ:
import org.rut.util.algorithm.support.BubbleSort; `nu''B H
import org.rut.util.algorithm.support.HeapSort; FJMrs[
import org.rut.util.algorithm.support.ImprovedMergeSort; \-g)T}g,I
import org.rut.util.algorithm.support.ImprovedQuickSort; 9 AJ(&qY(
import org.rut.util.algorithm.support.InsertSort; <7~'; K
import org.rut.util.algorithm.support.MergeSort; A}l3cP; `#
import org.rut.util.algorithm.support.QuickSort; WPQ fhr#|
import org.rut.util.algorithm.support.SelectionSort; a|X a3E
import org.rut.util.algorithm.support.ShellSort; ui?
4t=G
/** PUUwv_
* @author treeroot B6={&7U2
* @since 2006-2-2 'dn]rV0(C
* @version 1.0 ez|)ph7
*/ W)bLSL]`E
public class SortUtil { 7j-4TY~
public final static int INSERT = 1; {tWf
public final static int BUBBLE = 2; qi^7
public final static int SELECTION = 3; ~A\GT$
public final static int SHELL = 4; > ;*b|Ik
public final static int QUICK = 5; |!4K!_y
public final static int IMPROVED_QUICK = 6; o4Om}]Ti
public final static int MERGE = 7; .6Pw|xu`Pw
public final static int IMPROVED_MERGE = 8; d$1@4r
public final static int HEAP = 9; ,5h)x"s
I`!<9OTBj
public static void sort(int[] data) { DW[N|-L
sort(data, IMPROVED_QUICK); F'21jy&
} BI%$c~wS
private static String[] name={ <J`0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .:F%_dS D
}; /V'A%2Cl=T
@J/K-.r
private static Sort[] impl=new Sort[]{ 2fL;-\!y(
new InsertSort(), 'DCTc&J['
new BubbleSort(), %iQD /iT5
new SelectionSort(), 8)_XJ"9)G
new ShellSort(), bE !GJZ
new QuickSort(), _z|65H
new ImprovedQuickSort(), JkbQyn
new MergeSort(), <<][hQs
new ImprovedMergeSort(), |IzPgC
new HeapSort() 8<QdMkI
}; + R~'7*EI
&OH={Au
public static String toString(int algorithm){ Fww :$^_ k
return name[algorithm-1]; W:pIPDx1=!
} NXrJfp
s{*[]!
public static void sort(int[] data, int algorithm) { k5'Vy8q
impl[algorithm-1].sort(data); _9F9W{'
} o6.^*%kM'
W*2BT z
public static interface Sort { 3[Qxd{8r
public void sort(int[] data); rX2.i7i,
} (@fHl=! Za
m;GCc8
public static void swap(int[] data, int i, int j) { )"7iJb<E
int temp = data; Pd_U7&w,5
data = data[j]; !Dn,^
data[j] = temp; p8Qk'F=h
} SE1=>S%p
} '-Vt|O_Q