[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; koG{ |elgB
} ]$-cMX
int i1=l; 8TV;Rtl
int i2=mid+1; ed 59B)?l
for(int cur=l;cur<=r;cur++){ Q[n\R@
if(i1==mid+1) 3Mjj'5KH!
data[cur]=temp[i2++]; 6c4&VW
else if(i2>r) 'fV%Z
data[cur]=temp[i1++]; xg`h40c
else if(temp[i1] data[cur]=temp[i1++]; '=E9En#@
else imB#Eo4eY
data[cur]=temp[i2++]; Nil}js27
} d;[u8t
} M5L{*>4|6
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} kK>Xrj6
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改进后的归并排序: IV16d
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package org.rut.util.algorithm.support; +ZsX*/TOn
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import org.rut.util.algorithm.SortUtil; -!M,75nU
g:ErZ;[
/** 6SM:x]`##,
* @author treeroot AbwbAm+
* @since 2006-2-2 FVsj;
* @version 1.0 83~ i:+;
*/ pcS+o
public class ImprovedMergeSort implements SortUtil.Sort { @ T;L$x
fG LG$b
private static final int THRESHOLD = 10; @~ Dh'w2q
c~,23wP1
/* eitu!=u
* (non-Javadoc) b8KsR=]4I
* c{#yx_)V&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \0;(VLN'U
*/ *O$CaAr\s
public void sort(int[] data) { f|EUqu%E
int[] temp=new int[data.length]; 7v}x?I
mergeSort(data,temp,0,data.length-1); 2RtHg_d_l
} k8nLo.O
8ovM\9qT
private void mergeSort(int[] data, int[] temp, int l, int r) { XE3aXK'R
int i, j, k; V3N0Og3
int mid = (l + r) / 2; H!IshZfktn
if (l == r) u0)7i.!M
return; [s1pM1x
if ((mid - l) >= THRESHOLD) 8iQ[9
mergeSort(data, temp, l, mid); ^n.WZUk
else 1$lh"fHU
insertSort(data, l, mid - l + 1); 1nhtM
if ((r - mid) > THRESHOLD) 5~ 'Ie<Y_
mergeSort(data, temp, mid + 1, r); m`?MV\^
else A1Y7;-D
insertSort(data, mid + 1, r - mid); <G8w[hs
%GEJnJ
for (i = l; i <= mid; i++) { &NZfJs
temp = data; t/oN>mQG
} "VxWj}+]
for (j = 1; j <= r - mid; j++) { ,{eUP0]
temp[r - j + 1] = data[j + mid]; er.L7
} al9.}
int a = temp[l]; \(UKdv
int b = temp[r]; L#[]I,
for (i = l, j = r, k = l; k <= r; k++) { X<OSN&d
if (a < b) { #.B"q:CW*P
data[k] = temp[i++]; =nUW'
a = temp; [`=LTBt
} else { #_ C
data[k] = temp[j--]; !G5a*8]
b = temp[j]; &F$:Q:* *
} d5I f"8`@
} ]<uQ.~
} R5_i15<
8[%Ao/m
/** qa >Ay|92e
* @param data [&S}dQ"
* @param l Oeya%C5'
* @param i \a^,sV
*/ th5g\h%j*
private void insertSort(int[] data, int start, int len) { Wo$%9!W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8euZTfK9e
} "I- w
} \[2lvft!
} 'fwU]Hm
} &sVvWNO#2
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堆排序： F9q8SA#"
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package org.rut.util.algorithm.support; ~q0*"\Ff
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import org.rut.util.algorithm.SortUtil; a@d=>CT$
.4.pJbOg
/** c8 K3.&P6
* @author treeroot 3B0lb"e
* @since 2006-2-2 [t]X/O3<
* @version 1.0 f2)XP$:
*/ E9!N>0
public class HeapSort implements SortUtil.Sort{ s=I'e/"7
\g)Xt?w0Wo
/* (non-Javadoc) RH;:9_*F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g\oSG)
*/ 3#kitmV
public void sort(int[] data) { -5G)?J/*
MaxHeap h=new MaxHeap(); 3+7^uR$/I4
h.init(data); w]j+9-._
for(int i=0;i h.remove(); H%f:K2
System.arraycopy(h.queue,1,data,0,data.length); CENVp"C/`
} lVH<lp_ZtK
wgeNs9L
private static class MaxHeap{ pj|pcv^
Q'B6^%:<~
void init(int[] data){ ?@6b>='!
this.queue=new int[data.length+1]; q(^Q3
for(int i=0;i queue[++size]=data; ]Z<_ "F
fixUp(size); .]4W!])9
} em@EDMvI
} jZfx Jm
U$&hZ_A
private int size=0; iGXI6`F"
`xS{0P{uj
private int[] queue; t-%Q`V=[
[V#r7a
public int get() { ^S)TO}e
return queue[1]; [(LV
} p 5u_1U0
BF|(!8S$U
public void remove() { m8]?hJY3l
SortUtil.swap(queue,1,size--); {-zMHVw=}
fixDown(1); ~!6K]hB4
} Tn-C>=tR~%
file://fixdown DdV'c@rq+
private void fixDown(int k) { C2e.2)y
int j; F-Z%6O,2
while ((j = k << 1) <= size) { ?^HfNp9
if (j < size %26amp;%26amp; queue[j] j++; OIb
if (queue[k]>queue[j]) file://不用交换 _K2?YY(#>
break; "T/>d%O1b
SortUtil.swap(queue,j,k); lw%?z/HDf
k = j; 8am`6;O:!
} e>'H IO
} 1nj(hg
private void fixUp(int k) { `<\}FS`'
while (k > 1) { beY=g7|
int j = k >> 1; Ru!He,k7
if (queue[j]>queue[k]) @pV5}N[]
break; z(RL<N%
SortUtil.swap(queue,j,k); ~K_Uq*dCE
k = j; <{(/E0~V/<
} ^o?SM^
} X##1! ad
!SOrCMHx
} eZhPu'id\s
dP$GThGl
} M s9E@E
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SortUtil： 3{Nbp
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package org.rut.util.algorithm; !%mAh81{&/
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import org.rut.util.algorithm.support.BubbleSort; iSRpfU
import org.rut.util.algorithm.support.HeapSort; qKS;x@
import org.rut.util.algorithm.support.ImprovedMergeSort; Cz#Z<:
import org.rut.util.algorithm.support.ImprovedQuickSort; OY-w?'p?W
import org.rut.util.algorithm.support.InsertSort; zkM"cb13q/
import org.rut.util.algorithm.support.MergeSort; .uo.N
import org.rut.util.algorithm.support.QuickSort; C=Fzu&N}
import org.rut.util.algorithm.support.SelectionSort; |C \}P
import org.rut.util.algorithm.support.ShellSort; #4LFG\s
~Z/ ^c,[:
/** }Y(]6$uS
* @author treeroot PrQ?PvA<L
* @since 2006-2-2 A?5E2T1L%.
* @version 1.0 4S0>-?{
*/ F7m?xy
public class SortUtil { ge3sU5iZ
public final static int INSERT = 1; >r/rc`Q
public final static int BUBBLE = 2; l2%bF8]z
public final static int SELECTION = 3; cNpe_LvW
public final static int SHELL = 4; 4o:hyh
public final static int QUICK = 5; N<|$h5isq
public final static int IMPROVED_QUICK = 6; 2g{)AtK$#
public final static int MERGE = 7; IHfzZHy
public final static int IMPROVED_MERGE = 8; `L;eba
public final static int HEAP = 9; X8eJ4%
{npcPp9
public static void sort(int[] data) { 8{U-m0v
sort(data, IMPROVED_QUICK); BDY}*cX
} *="8?Z
private static String[] name={ jdeV|H} u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }G46g#_6d>
}; Q "r_!f
u]^N&2UW
private static Sort[] impl=new Sort[]{ [mxTa\
new InsertSort(), /76 1o\Q
new BubbleSort(), D-imL;|
new SelectionSort(), m%+IPZ2m
new ShellSort(), DH DZ_t:
new QuickSort(), NBh%:tu7M
new ImprovedQuickSort(), `7aDEzmJ
new MergeSort(), g_*T?;!.U
new ImprovedMergeSort(), z!QDTIb
new HeapSort() `;,Pb&W~
}; p_*M:P1Ma4
d<w~jP\
public static String toString(int algorithm){ 9_ICNG%
return name[algorithm-1]; NW|f7 ItX
} SDG-~(Y
R`Aj|C z
public static void sort(int[] data, int algorithm) { wCs3:@UH
impl[algorithm-1].sort(data); j;yf8Nf
} &MR/6"/s
z9 u$~
public static interface Sort { D;GD<zC]
public void sort(int[] data); #yseiVm;
} (LvS :?T}
$ZPX]2D4B#
public static void swap(int[] data, int i, int j) { ;wiao(t>4N
int temp = data; $!vxVs9n
data = data[j]; h)lPi
data[j] = temp; b/$km?R
} :vx$vZb
} A|#`k{+1-