[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; N8v'70
} -kpswP
int i1=l; \'Z<P,8~
int i2=mid+1; )zq.4
for(int cur=l;cur<=r;cur++){ [mUBHYD7OI
if(i1==mid+1) y#v"GblM
data[cur]=temp[i2++]; <YFY{VC(
else if(i2>r) W2Luz;(U
data[cur]=temp[i1++]; :B|Dr v
else if(temp[i1] data[cur]=temp[i1++]; PWB(5 f?
else 7\XE,;4>
data[cur]=temp[i2++]; cCY/gEv
} -"Q-H/qh
} 9 [jTs3l:
5,pSg
} 'Z&;uv,l
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改进后的归并排序: nmFC%p)4
npp[@*~
package org.rut.util.algorithm.support; 06*rWu9P3
(\a6H2z8l
import org.rut.util.algorithm.SortUtil; ^YvB9XN
g~S)aU\:,
/** kforu!C
* @author treeroot @kFu*"
* @since 2006-2-2 FP^{=0
* @version 1.0 R?66b{O
*/ cK`"lxO
public class ImprovedMergeSort implements SortUtil.Sort { >TjJA#
HKO739&n}
private static final int THRESHOLD = 10; !@A#=(4R4
{/<6v. v
/* 7=XL!:P
* (non-Javadoc) %7hB&[ 5
* c+dg_*^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <#+44>h
*/ &<pKx!
public void sort(int[] data) { LN2D
int[] temp=new int[data.length]; <3okiV=ox
mergeSort(data,temp,0,data.length-1); ^pnG0(9
} zsXoBD\h
C\ZkGX
private void mergeSort(int[] data, int[] temp, int l, int r) { !? 5U|
int i, j, k; qTQ!jN
int mid = (l + r) / 2; "xRBE\B
if (l == r) Jb["4X;h
return; <?Wti_ /M
if ((mid - l) >= THRESHOLD) q2rUbU_A(
mergeSort(data, temp, l, mid); x]|+\1
else vhuw&.\
insertSort(data, l, mid - l + 1); ULH0'@BJ
if ((r - mid) > THRESHOLD) TBrGA E
mergeSort(data, temp, mid + 1, r); }MbH3ufC
else Q,h7Sk*
insertSort(data, mid + 1, r - mid); C1EtoOv K
%wptZ"2M
for (i = l; i <= mid; i++) { k0-G$|QgIp
temp = data; cLY c6
} qU6nJi+-I
for (j = 1; j <= r - mid; j++) { 1xE]6he4{T
temp[r - j + 1] = data[j + mid]; Mg,:UC:
} +;}#B~:
int a = temp[l]; #-% A[7Cdp
int b = temp[r]; JPn$FQD
for (i = l, j = r, k = l; k <= r; k++) { k>jbcSY(z<
if (a < b) { _ee dBpV
data[k] = temp[i++]; 7Q w|!
a = temp; 6x)$Dl
} else { !R-z%
data[k] = temp[j--]; F}GPZ=T;
b = temp[j]; YC_5YY(k
} !QI\Fz?
} bI.t<;
} ^D`v3d
Mb1t:Xf^g
/** KOz(TZ?u
* @param data 8X|r4otn4
* @param l ^ci3F<?Q=
* @param i 1?*
*/ 0[?ny`Y
private void insertSort(int[] data, int start, int len) { &UCsBqIY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4MuO1W-
} 2QpHvsl_
} E{^XlY
} Rm1A>1a:
} A\_|un%
+ b$=[nfG
堆排序： -x8nQ%X
p!O(Y6QM
package org.rut.util.algorithm.support; |2\{z{?
~_IHaw$hg
import org.rut.util.algorithm.SortUtil; RB* J=
/2EHv.e`
/** Ch$*Gm19Z
* @author treeroot jcNT<}k C
* @since 2006-2-2 Uy ?
* @version 1.0 ;w|b0V6
*/ ]lw|pvtd
public class HeapSort implements SortUtil.Sort{ AcI,N~~
VvFC -r,=G
/* (non-Javadoc) l\M_-:I+4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z@|GC_L
*/ ;,i]w"*
public void sort(int[] data) { Uj+j}C
MaxHeap h=new MaxHeap(); a22Mufl
h.init(data); X|0R=n]
for(int i=0;i h.remove(); \<}&&SuH
System.arraycopy(h.queue,1,data,0,data.length); f7h*Vu`>
} /!^&;$A'
Hqnxq
private static class MaxHeap{ c|F[.;cR
kn)t'_jC
void init(int[] data){ [V'QrcCF
this.queue=new int[data.length+1]; :=%0Mb:
for(int i=0;i queue[++size]=data; o?1;<gs
fixUp(size); Xc"&0v%;#
} [aI]y=v
} s&\I=J.
B+^(ktZp@
private int size=0; \AL f$88>@
!RyO\>:q
private int[] queue; \#o2\!@`
K=!Bh*
public int get() { fwK}/0%
return queue[1]; (b'B%rFO
} V $z} K
=@k%&* Y?
public void remove() { upj]6f"(
SortUtil.swap(queue,1,size--); .h0b~nI>>
fixDown(1); w =.Fj
} [mEql,x3
file://fixdown U=hlu
private void fixDown(int k) { Y"-^%@|p
int j; =+t^f
while ((j = k << 1) <= size) { s"Pf+aTW
if (j < size %26amp;%26amp; queue[j] j++; n,B,"\fw
if (queue[k]>queue[j]) file://不用交换 >^XBa*4;Y
break; P/EM :
SortUtil.swap(queue,j,k); J|'7_0OAx
k = j; Ut$;ND.-
} kP/M<X"
} 6c^e\0q
private void fixUp(int k) { asY[8r?U
while (k > 1) { \(t@1]&jw
int j = k >> 1; 0b4R
if (queue[j]>queue[k]) CR6R?R3b
break; /dv<qp
SortUtil.swap(queue,j,k); el:9wq
k = j; 5@^ dgq
} bdGIF'p%
} \P1S|ufv
K&8dA0i2u2
} k)TSR5A
kcb.Wz~=
} JyR/1 W
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SortUtil： ooUk O
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package org.rut.util.algorithm; -V:"l
t3dlS`O
import org.rut.util.algorithm.support.BubbleSort; TLoz)&@
import org.rut.util.algorithm.support.HeapSort; $Y5)(
import org.rut.util.algorithm.support.ImprovedMergeSort; Gs3LB/8?
import org.rut.util.algorithm.support.ImprovedQuickSort; #v<QbA
import org.rut.util.algorithm.support.InsertSort; MwmUgN"g
import org.rut.util.algorithm.support.MergeSort; &QhX1dT+
import org.rut.util.algorithm.support.QuickSort; wn)JXR
import org.rut.util.algorithm.support.SelectionSort; ~I{n^Q/a
import org.rut.util.algorithm.support.ShellSort; +-E~6^>
$H+VA@_
/** e["2QIOe
* @author treeroot LBF 1;zjK
* @since 2006-2-2 =m5SK5vLKT
* @version 1.0 gn3jy^5
*/ NJNJjdD>
public class SortUtil { SRDXfkoI
public final static int INSERT = 1; X^WrccNX
public final static int BUBBLE = 2; #>j.$2G>
public final static int SELECTION = 3; |j 6OM{@
public final static int SHELL = 4; B" 3dQwQ
public final static int QUICK = 5; Qx[t/~
public final static int IMPROVED_QUICK = 6; qIld;v8w"g
public final static int MERGE = 7; <!pY$
public final static int IMPROVED_MERGE = 8; !qX_I db\
public final static int HEAP = 9; B/` !K
i86>]
public static void sort(int[] data) { E*jP87g
sort(data, IMPROVED_QUICK); ?s:d[To6
} 5Kkdo!z
private static String[] name={ V*W;OiE_3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3>Y6)
}; gks{\H]
o1<_fI
private static Sort[] impl=new Sort[]{ hGiz)v~
new InsertSort(), <n(*Xak{a
new BubbleSort(), A'2w>8
new SelectionSort(), a{[x4d,z
new ShellSort(), Me=CSQqf<
new QuickSort(), Br`IW
new ImprovedQuickSort(), tO0!5#-VR
new MergeSort(), [H=)
new ImprovedMergeSort(), W^s ;Bi+Nw
new HeapSort() )n,P"0
}; zA[0mkC?$
%rxO_
public static String toString(int algorithm){ H/Llj.-jg
return name[algorithm-1]; up'Tit
} );FJx~b
lGVEpCS}
public static void sort(int[] data, int algorithm) { L(U"U#QZ
impl[algorithm-1].sort(data); F4K0);
} 9]e V?yoA8
$ aUo aI
public static interface Sort { 48Mpf=f`
public void sort(int[] data); X,LD
} :rg5Kt&
7e<c$t#H
public static void swap(int[] data, int i, int j) { p ZZc:\fJ
int temp = data; _r2J7&
data = data[j]; ai{Sa U
data[j] = temp; x:QgjK
} ;$z$@@WC
} P LueVz