[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; bOjvrg;Sz\
} _[;>V*?zp5
int i1=l; owL>w
int i2=mid+1; `s#0/t
for(int cur=l;cur<=r;cur++){ cPA-EH
if(i1==mid+1) WNSf$D{p
data[cur]=temp[i2++]; H_)\:gTG
else if(i2>r) IJHNb_Cku
data[cur]=temp[i1++]; 'qcLK>E
else if(temp[i1] data[cur]=temp[i1++]; Cj31>k1
else +F3@-A
data[cur]=temp[i2++]; (t'hWS
} ,jJ&x7ra8
} JU+Uzp
vQB;a?)o
} 2RXU75VY
C9zQ{G
改进后的归并排序: 8 tMfh
QA?e2kd
package org.rut.util.algorithm.support; ;;rEv5 /
5&a4c"fU
import org.rut.util.algorithm.SortUtil; O8:$sei$
MmH[ 7R
/** 7U68|\fI!
* @author treeroot =9$hZ c
* @since 2006-2-2 )X-b|D4O
* @version 1.0 SKf9 yS#
*/ ut z.
public class ImprovedMergeSort implements SortUtil.Sort { =" Q5Z6W
lZoy(kdc
private static final int THRESHOLD = 10; fwaq
!f5I.r~
/* d`]|i:*q
* (non-Javadoc) j3{8]D
* *Pj[r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F<SMU4]YdG
*/ ERcj$ [:T(
public void sort(int[] data) { ',GWH:B
int[] temp=new int[data.length]; F FHk0!3
mergeSort(data,temp,0,data.length-1); &?L K>QV
} ;M{@|z[Nv
} LuPYCzpu
private void mergeSort(int[] data, int[] temp, int l, int r) { fNb2>1
int i, j, k; dx['7l;I
int mid = (l + r) / 2; H]e%8w))0
if (l == r) dXr=&@1
return; 7"}<J7"})
if ((mid - l) >= THRESHOLD) =xwA'D9]
mergeSort(data, temp, l, mid); ^M?O
else / J 3
insertSort(data, l, mid - l + 1); U~!yGjF
if ((r - mid) > THRESHOLD) %|mRib|<C
mergeSort(data, temp, mid + 1, r); #wz1uw[pI!
else YC!Tgb~H
insertSort(data, mid + 1, r - mid); lGHU{7j\
3^p<Wx
for (i = l; i <= mid; i++) { !GJnYDN
temp = data; 5IOMc4v
} Qw>ftle
for (j = 1; j <= r - mid; j++) { &t.9^;(
temp[r - j + 1] = data[j + mid]; .48Csc-
} <>3}<i<[&
int a = temp[l]; Vgy}0pCl
int b = temp[r]; E-Z6qZ^
for (i = l, j = r, k = l; k <= r; k++) { D)C^'/8q
if (a < b) { &8VB{S>r
data[k] = temp[i++]; b[+G+V
a = temp; ^7Sk`V
} else { [k~V77w 14
data[k] = temp[j--]; R5O{;/w
b = temp[j]; MExP'9
} +E.}k!y
} H/!_D f
} kMD:~V
1J$sIY,Ou
/** 5I#L|+
* @param data K/oC+Z;K
* @param l z"4UObVs
* @param i Y@)iPK@z
*/ );4lM%]eb
private void insertSort(int[] data, int start, int len) { vZEeb j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w!$|IC
} H.\gLIr
} C>%2'S^.b
} Rw4"co6
} HJFt{tq2
8Ar5^.k
堆排序： wc#+Yh6
dz^l6<a"n
package org.rut.util.algorithm.support; }9n{E-bj*
+T}:GBwD7
import org.rut.util.algorithm.SortUtil; CiE
qU!*QZ^y&
/** Az+}[t
* @author treeroot 3#)I7FG
* @since 2006-2-2 h.\V;6ly
* @version 1.0 ~jK'n4
*/ dP8b\H
public class HeapSort implements SortUtil.Sort{ $umh&z/
WfbG }%&J
/* (non-Javadoc) c^^[~YWj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -Y]ue*k{
*/ <~:Lp:6 J
public void sort(int[] data) { F Qtlo+3
MaxHeap h=new MaxHeap(); 1r6>.&p
h.init(data); D&5>Op4U
for(int i=0;i h.remove(); 1mT3$Z
System.arraycopy(h.queue,1,data,0,data.length); ?L=@Zs
} bLMN9wGOgK
N?!]^jI,
private static class MaxHeap{ 0IHcyb
!Pnvqgp/
void init(int[] data){ BMlnzi
this.queue=new int[data.length+1]; 0cV=>|b>;
for(int i=0;i queue[++size]=data; b&k !DeE
fixUp(size); \B _g=K
} 63b?-.!b
} ;B[*f?y-
wOH$S=Ba5,
private int size=0; /A3tY"Vn
X}?`G?'
private int[] queue; +bwSu)k
UEeD Nl$^u
public int get() { ur\v[k=
return queue[1]; STMc@MeZU_
} Y\!* c=@k
f?O?2g
public void remove() { zcCX;N
SortUtil.swap(queue,1,size--); s53Pw>f
fixDown(1); 0)/L+P5
} <dxc"A
file://fixdown Ps3wg=ni[
private void fixDown(int k) { <ptZY.8N
int j; 7TCY$RcF,I
while ((j = k << 1) <= size) { T_}9b
if (j < size %26amp;%26amp; queue[j] j++; t!MGSB~
if (queue[k]>queue[j]) file://不用交换 %u"3&kOV
break; 3D3/\E#'o
SortUtil.swap(queue,j,k); w i,}sEoM
k = j; yyZV/ x~
} $ZSjq
} PPiN`GM
private void fixUp(int k) { RJ/4T#b"+
while (k > 1) { }?zy*yL
int j = k >> 1; AS[yNCsjC
if (queue[j]>queue[k]) {j%'EJ5
break; Dh=?Hzw
SortUtil.swap(queue,j,k); m44Ab6gpsb
k = j; ~Rx:X4|H
} 1-`Il]@?8
} pWY $aI
>BU"C+a8g
} dTN[E6#R
H$2<N@'4z
} d>j`|(\
tz#Fy?pe
SortUtil： L;d(|7BVv
pSM\(kVKa
package org.rut.util.algorithm; b}DxD1*nsI
.W[ 9G\
import org.rut.util.algorithm.support.BubbleSort; ~gz_4gzb
import org.rut.util.algorithm.support.HeapSort; :\I88 -N@'
import org.rut.util.algorithm.support.ImprovedMergeSort; iTf]Pd'
import org.rut.util.algorithm.support.ImprovedQuickSort; S>AM?
import org.rut.util.algorithm.support.InsertSort; k+ Shhe1
import org.rut.util.algorithm.support.MergeSort; kXw&*B-/
import org.rut.util.algorithm.support.QuickSort; "`l8*]z
import org.rut.util.algorithm.support.SelectionSort; .EJo9s'
import org.rut.util.algorithm.support.ShellSort; DbRq,T
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/** ] B ZSW
* @author treeroot \.m"u14[b
* @since 2006-2-2 : b9X?%L~
* @version 1.0 y8jwfO3
*/ l423+vo
public class SortUtil { mUFg(;ya
public final static int INSERT = 1; y7a84)j3
public final static int BUBBLE = 2; ?];?3X~|
public final static int SELECTION = 3; [T|_J$ ;
public final static int SHELL = 4; RM/q\100
public final static int QUICK = 5; AUZ^XiK
public final static int IMPROVED_QUICK = 6; ~.-o*
public final static int MERGE = 7; @)"= b!q=
public final static int IMPROVED_MERGE = 8; v#yeiE4
public final static int HEAP = 9; "Dr8}g:X
vUtA@
public static void sort(int[] data) { lOk'stLNa&
sort(data, IMPROVED_QUICK); -?T:> *]p
} v/NkG;NWM
private static String[] name={ rUJIf;Zwo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Rn(6Fk?
}; *qM)[XO
b/>L}/^PM
private static Sort[] impl=new Sort[]{ ;;r}=0V*=
new InsertSort(), PH6!T/2[
new BubbleSort(), Pra,r9h,
new SelectionSort(), bq+Q$#F2X
new ShellSort(), =8Bq2.nlR
new QuickSort(), Szz:$!t
new ImprovedQuickSort(), B4 XN
new MergeSort(), ?H7YmN
new ImprovedMergeSort(), JerueF;J
new HeapSort() ((Jiv=%
}; >m66j2(H*Z
_ML`Vh]
public static String toString(int algorithm){ @Kl'0>U
return name[algorithm-1]; >)V1aLu=
} rV *`0hA1
D\"F?>
public static void sort(int[] data, int algorithm) { B)^uGSW
impl[algorithm-1].sort(data); Zt3Y<3o
} .(2Zoa
D' d^rT| H
public static interface Sort { x'OYJ>l|
public void sort(int[] data); h_xHQf&#
} Qv v~nGq$
5!tiu4LU
public static void swap(int[] data, int i, int j) { i'6>_,\(
int temp = data; 5(+9( \x
data = data[j]; @d/Wa=K
data[j] = temp; !Z0p94L
} e<.O'!=7Y
} qFV }Y0w