[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; +ppA..1
} a=j'G]=
int i1=l; lD3nz<p
int i2=mid+1; 37jxl+
for(int cur=l;cur<=r;cur++){ :p: C
if(i1==mid+1) {LF4_9 =
data[cur]=temp[i2++]; CKK}Z;~:
else if(i2>r) ]r|oNGD)G
data[cur]=temp[i1++]; :[_msd
else if(temp[i1] data[cur]=temp[i1++]; 1 rhZlmf[r
else "t.`/4R2w
data[cur]=temp[i2++]; }}tbOD)t
} < z2wt
} A)C)5W
@lE'D":?
} / }$n_N\!)
|0=UZK7%O
改进后的归并排序: ,n8\y9{G
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package org.rut.util.algorithm.support; i}DS+~8v
[A,^F0:h
import org.rut.util.algorithm.SortUtil; @pYEzizP7
iI IXv
/** 'v V7@@
* @author treeroot pCh v;
* @since 2006-2-2 *l+Dbm,u
* @version 1.0 + tMf&BZ
*/ \$wkr
public class ImprovedMergeSort implements SortUtil.Sort { P7.bn
:NF4[c
private static final int THRESHOLD = 10; ,?|$DY+=
OA[e}Vn
/* ]c7X~y
* (non-Javadoc) MqAi}z%
* vW=L{8zu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2Ckx.m&
*/ HTOr
public void sort(int[] data) { &2`p#riAS
int[] temp=new int[data.length]; I} jgz
mergeSort(data,temp,0,data.length-1); 3@gsKtA&H4
} V|_ h[hXE
_2!8,MX
private void mergeSort(int[] data, int[] temp, int l, int r) { VWE>w|'
int i, j, k; ;[Mvk6^'R
int mid = (l + r) / 2; 9KXL6#h
if (l == r) :h{uZ,#Gi
return; z~ C8JY:
if ((mid - l) >= THRESHOLD) VX$WL"A
mergeSort(data, temp, l, mid); u##th8h4U
else T^1 Z_|A
insertSort(data, l, mid - l + 1); 8#7qHT;cx
if ((r - mid) > THRESHOLD) + t5SrO!`
mergeSort(data, temp, mid + 1, r); Tf86CH=)5
else 1g{Pe`G,
insertSort(data, mid + 1, r - mid); (jc& Fk
IA@>'O
for (i = l; i <= mid; i++) { (h3L=
temp = data; m$W>~
} E&P2E3P
for (j = 1; j <= r - mid; j++) { C_Ewu*T7
temp[r - j + 1] = data[j + mid]; 'k X8}bx
} H&)}Z6C"
int a = temp[l]; +P2oQ_Fk`9
int b = temp[r]; !5o j~H
for (i = l, j = r, k = l; k <= r; k++) { e|\xFV=4
if (a < b) { 9 %T??-
data[k] = temp[i++]; "=djo+y
a = temp; pd|KIs%jl
} else { Jay"
data[k] = temp[j--]; yfZNL?2x
b = temp[j]; "o&8\KSs
} cs+3&T:,*
} eThaH0
} $eYL|?P50h
KC6Cg?y^
/** lvO6&sF1
* @param data e7RgA1
* @param l K*>%,mP$i
* @param i VVas>/0qr
*/ 5qb93E"C
private void insertSort(int[] data, int start, int len) { {]T?)!Vm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @Vre)OrN#
} 0<uek
} S(zp_
} M^o_='\bE
} {o}U"b<+Ra
1!<t8,W4
堆排序： KewW8H~tb
,vR?iNd:q[
package org.rut.util.algorithm.support; vYed_'_
IfK~~XYG
import org.rut.util.algorithm.SortUtil; tVAi0`DV
ubcB<=xb
/** 0gd`W{YP
* @author treeroot v675C#l(
* @since 2006-2-2 >JyS@j}
* @version 1.0 H7zN|NdNw
*/ jRJG .hcB5
public class HeapSort implements SortUtil.Sort{ qoO`)<
4&}%GH>}
/* (non-Javadoc) u 272)@R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bf utmI
*/ oac)na:O#
public void sort(int[] data) { *F\wWg'!B
MaxHeap h=new MaxHeap(); n i#jAwkN5
h.init(data); 6"Uu;Q
for(int i=0;i h.remove(); \^!;r9z=A
System.arraycopy(h.queue,1,data,0,data.length); J9Ao*IW~
} 1BSd9Ydj
B9maz"lJ
private static class MaxHeap{ XO+BZB`F
M/N8bIC! Q
void init(int[] data){ vO}r(kNJ
this.queue=new int[data.length+1]; PG&t~4QM`
for(int i=0;i queue[++size]=data; XF!L.'zH
fixUp(size); JrzPDb`m
} PCviQ!X
} #e'>9T
m$T5lKn}U?
private int size=0; gHg=G+Q@
%?ElC
private int[] queue; \|HEe{nA
*~#I5s\s!
public int get() { my (@~'
return queue[1]; QAs)zl0
} fAsb:P
U,Z\)+-R
public void remove() { J @Hg7Faz
SortUtil.swap(queue,1,size--); |[SHpcq>
fixDown(1); s L^+$Mq6
} ]o6ZZK
file://fixdown vqm|D&HU
private void fixDown(int k) { vpQ&vJfR
int j; /ZvP.VW&
while ((j = k << 1) <= size) { scg&"s
if (j < size %26amp;%26amp; queue[j] j++; L;Ff(0x|
if (queue[k]>queue[j]) file://不用交换 4ud(5m;Rle
break; {9@D zP
SortUtil.swap(queue,j,k); &6eo;8 `U
k = j; 2W,9HSu8
} vV,TT%J8D
} y]db]pP5
private void fixUp(int k) { FZ"n6hWA
while (k > 1) { l_g$6\&|
int j = k >> 1; q$:1Xkl
if (queue[j]>queue[k]) RkYdK$|K
break; Y%KowgP\
SortUtil.swap(queue,j,k); `"5Ub,~
k = j; +A}t_u3<
} fap`;AuwK
} r w?wi}}gn
6jq*lnA%
} aU!}j'5Q
^ZwZze:2
} I\l&'Q^0@
tOIqX0dWd
SortUtil： on_h'?2
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package org.rut.util.algorithm; Qi18q|l8v
nBy-/BU&
import org.rut.util.algorithm.support.BubbleSort; E'08'8y
import org.rut.util.algorithm.support.HeapSort; )U&9d
import org.rut.util.algorithm.support.ImprovedMergeSort; 67j kU!
import org.rut.util.algorithm.support.ImprovedQuickSort; j~q 7v `":
import org.rut.util.algorithm.support.InsertSort; y=Y k$:-y
import org.rut.util.algorithm.support.MergeSort; Zxebv#4
import org.rut.util.algorithm.support.QuickSort; .n8R%|C5
import org.rut.util.algorithm.support.SelectionSort; (xfc_h*xA
import org.rut.util.algorithm.support.ShellSort; *:%&z?<Fw
!0;AFv`\
/** Y{} ub]i
* @author treeroot fn}E1w
* @since 2006-2-2 ~+Wx\:TT
* @version 1.0 vjEDd`jYZ
*/ K~L&Z?~|E
public class SortUtil { K=gg<E<
public final static int INSERT = 1; #C9f?fnM
public final static int BUBBLE = 2; f_~T
public final static int SELECTION = 3; ;hT3N UCA
public final static int SHELL = 4; )D8op;Fn
public final static int QUICK = 5; UmR)L!QT8
public final static int IMPROVED_QUICK = 6; 8eXeb|?J
public final static int MERGE = 7; XGa8tI[:X
public final static int IMPROVED_MERGE = 8; l.}PxZ
public final static int HEAP = 9; ,6^<Vg
5rsz2;#p
public static void sort(int[] data) { ufXWK3~\
sort(data, IMPROVED_QUICK); "Bd-h|J
} 9g6$"',H
private static String[] name={ [ V.67_~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OyO<A3
}; /~,*DH$)
Ao K9=F}
private static Sort[] impl=new Sort[]{ $kUB%\`
new InsertSort(), P(aBJ*((~
new BubbleSort(), @)pC3Vi^
new SelectionSort(), 9qap#A
new ShellSort(), fFJ7Y+^
new QuickSort(), LUQ.=:mBR
new ImprovedQuickSort(), od `;XVG
new MergeSort(), 7KgaXi3r
new ImprovedMergeSort(), EQyX!
new HeapSort() nCYz];".
}; =xk>yw!O)
FGVw=G{r
public static String toString(int algorithm){ |4+'YgO
return name[algorithm-1]; Ag8/%a~(
} Xu-~j!
64'2ICf#m
public static void sort(int[] data, int algorithm) { O=%Ht-kOc
impl[algorithm-1].sort(data); Snkb^Kt
} ffP]U4
rN1]UaT
public static interface Sort { ;hQ[-
public void sort(int[] data); j/t%7,
} 6u_i>z
^q-%#
public static void swap(int[] data, int i, int j) { DOWWG!mx
int temp = data; q0ktABB
data = data[j]; gSFZ>v*6
data[j] = temp; 8F[];LF>
} Y-it3q'Z
} I~l qg