[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; gsfhH0
} Z/c_kf[
int i1=l; -%i#j>
int i2=mid+1; "/!'9na{QL
for(int cur=l;cur<=r;cur++){ :$2Yg[Zc3
if(i1==mid+1) #h{Nz/h+
data[cur]=temp[i2++]; r@Nl2
else if(i2>r) o$t &MST?i
data[cur]=temp[i1++]; :G0+;[?N
else if(temp[i1] data[cur]=temp[i1++]; fyrd`R
else (7L/eDMT
data[cur]=temp[i2++]; MX?}?"y
} k% NrL@z
} L20rv:W$h
-$9~xX
} LyV#j>gD
*F|+2?a:$
改进后的归并排序: RAwk7F3qn
nzWQQra|?
package org.rut.util.algorithm.support; NnP.k7m)
\imp7}N
import org.rut.util.algorithm.SortUtil; phmVkV2a;#
P#v^"}.Wd
/** aP_3C_
* @author treeroot &#-[Y:?lA
* @since 2006-2-2 >Zo-wYG
* @version 1.0 :Fnzi0b
*/ |eF.ZC)QWh
public class ImprovedMergeSort implements SortUtil.Sort { y qkX:jt
!?6.!2
private static final int THRESHOLD = 10; oc:x&`j
V(DjF=8
/* F^xaz^=`u
* (non-Javadoc) R}hlDJ/m-
* Y&:/~&'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Eu_NUFe
*/ K#@K"N=
public void sort(int[] data) { r_q~'r35_
int[] temp=new int[data.length]; F "!`X#
mergeSort(data,temp,0,data.length-1); RPY6Wh|4
} umryA{Ps
9\:w8M X'
private void mergeSort(int[] data, int[] temp, int l, int r) { _Qg{ ;
int i, j, k; aoK4Du{
int mid = (l + r) / 2; Txu>/1N,
if (l == r) `BpCRKTG
return; RW)k_#%=
if ((mid - l) >= THRESHOLD) &*jixqzvn
mergeSort(data, temp, l, mid); HwM/}-t
else leR"j
insertSort(data, l, mid - l + 1); 418gcg6)
if ((r - mid) > THRESHOLD) -CwWs~!
mergeSort(data, temp, mid + 1, r); h~:H?pj3g
else [&Lxz~W][
insertSort(data, mid + 1, r - mid); LPMb0F}"5
0OEtU5lf`y
for (i = l; i <= mid; i++) { i6FP[6H1
temp = data; j~.u>4
} jWhD5k@v
for (j = 1; j <= r - mid; j++) { yG4MUf6
temp[r - j + 1] = data[j + mid]; F; 0Dp
} #|q;t
int a = temp[l]; ,rXW`7!2
int b = temp[r]; bu;vpNa
for (i = l, j = r, k = l; k <= r; k++) { ]Px:d+wX:
if (a < b) { L^&do98
data[k] = temp[i++]; 4">84,-N
a = temp; N*? WUn9]
} else { CO7CNN
data[k] = temp[j--]; )|Jr|8
b = temp[j]; ,I=O"z>9
} 6B /Jp
} > d^r">!,
} } cRi A
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/** rtoSCj:
* @param data r!>es;R8
* @param l lf}?!*V`+
* @param i 3EAX]
*/ %sYk0~E
private void insertSort(int[] data, int start, int len) { =GLYDV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f7K8m|
} omr:C8T>
} -B",&yTV
} XPrY`,kN
} Fv<]mu
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堆排序： &MBOAHhze
I)qKS@
package org.rut.util.algorithm.support; 0GF%~6
s8C:QC
import org.rut.util.algorithm.SortUtil; UX03"gX
*pmoLiuB>
/** MI?]8+l
* @author treeroot 9[B<rz
* @since 2006-2-2 E\W;:p,{A
* @version 1.0 >I{4
*/ P^i6MZ?
public class HeapSort implements SortUtil.Sort{ 4+ykE:
[<,0A]m
/* (non-Javadoc) X*(gT1"t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }kpfJLjY
*/ }x>}:"P;W
public void sort(int[] data) { bwv/{3G,Ys
MaxHeap h=new MaxHeap(); vr5<LNCLQ
h.init(data); (8+.#1!*
for(int i=0;i h.remove(); hrUm}@d
System.arraycopy(h.queue,1,data,0,data.length); )WzGy~p8K
} 3XMBu*
\;4L~_2$q
private static class MaxHeap{ -<u- +CbuT
Z1E`I89<
void init(int[] data){ Q3'(f9 x
this.queue=new int[data.length+1]; ] `b<"
for(int i=0;i queue[++size]=data; [J(@$Qix
fixUp(size); o%y+Y;|?J
} y=y/d>=w
} ,K"r:)\
{b\Y?t^>f
private int size=0; PTfN+
e<&_tx
private int[] queue; ?Yynd
/r#b
public int get() { U0lqGEZ
return queue[1]; ]0at2
} 5M/%%Ox
gwZ+GA
public void remove() { ~GsH8yA_P
SortUtil.swap(queue,1,size--); ZdJVs/33Vn
fixDown(1); yHV^a0e7EH
} E` :ZH
file://fixdown !8H!Fj`|j
private void fixDown(int k) { TPN:cA6[c
int j; )of5229
while ((j = k << 1) <= size) { 8,Q.t7v
if (j < size %26amp;%26amp; queue[j] j++; Fj4l %=
if (queue[k]>queue[j]) file://不用交换 G~Q*:m
break; sYW1T @
SortUtil.swap(queue,j,k); ==r?
k = j; sWqPw}/3>
} FcJ.)U
} %Hh &u .
private void fixUp(int k) { N7Z(lI|a;
while (k > 1) { Huug_E+
int j = k >> 1; jSOa
if (queue[j]>queue[k]) \6nQ-S_
break; ZIGbwL
SortUtil.swap(queue,j,k); PG-cu$\??
k = j; &j wnM
} q^T&A[hMPx
} (<AM+|
MFCbx>#
} +lXdRc`6
f(9$"Vi
} \|b1s @c8
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SortUtil： 4,R\3`b
4p/V6kr&r
package org.rut.util.algorithm; JVIcNK)
TnZc.
import org.rut.util.algorithm.support.BubbleSort; ?6.KS
import org.rut.util.algorithm.support.HeapSort; =O}%bZ)Q
import org.rut.util.algorithm.support.ImprovedMergeSort; 'piF_5(@
import org.rut.util.algorithm.support.ImprovedQuickSort; C>(M+qXL+
import org.rut.util.algorithm.support.InsertSort; _,-M8=dL%*
import org.rut.util.algorithm.support.MergeSort; {KQ-Ce-6
import org.rut.util.algorithm.support.QuickSort; [b)K@Ha
import org.rut.util.algorithm.support.SelectionSort; 2Yg[8Tm#
import org.rut.util.algorithm.support.ShellSort; L}sm R,
~]t2?SqNm
/** gWU(uBS
* @author treeroot #D*J5k>2
* @since 2006-2-2 SUFaHHk@/b
* @version 1.0 N4GIb 6
*/ _R!!4Hp<Q
public class SortUtil { %;\2QI`R
public final static int INSERT = 1; /\Y%DpG$
public final static int BUBBLE = 2; u3?Pp[tM<
public final static int SELECTION = 3; /Z9`uK
public final static int SHELL = 4; J Wyoh|
public final static int QUICK = 5; 9[]"%6
public final static int IMPROVED_QUICK = 6; 1_E3DXe
public final static int MERGE = 7; cE8 _keR~
public final static int IMPROVED_MERGE = 8; ~Sem_U`G
public final static int HEAP = 9; 0R!}}*Ee>q
}JTgj
public static void sort(int[] data) { gt~2Br4
sort(data, IMPROVED_QUICK); )^'B:ic
} pUEok+
private static String[] name={ +H^V},dBp!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }T*xT>p^3
}; ;cHI3V
|h~/Zz=
private static Sort[] impl=new Sort[]{ kAF}*&Kzd~
new InsertSort(), xTawG?"D
new BubbleSort(), 7|eSvC
new SelectionSort(), {zN_l!
new ShellSort(), 2B?i2[a,
new QuickSort(), g4qdm{BL
new ImprovedQuickSort(), ~E|V{z%
new MergeSort(), dGW7,B~
new ImprovedMergeSort(), U=#ylQ
new HeapSort() (c|qX-%rC
}; V4i%|vV
=X'7V}Q}
public static String toString(int algorithm){ rxk{Li<9
return name[algorithm-1]; t4c#' y
} scEQDV
J0W).mD_H
public static void sort(int[] data, int algorithm) { 1Moh`
impl[algorithm-1].sort(data); DN{G$$or
} o[W3/
%~(i[Ur;
public static interface Sort { 05LQh
public void sort(int[] data); O!+5As
} &_hCs![
__%E!*m"<_
public static void swap(int[] data, int i, int j) { To? bp4
int temp = data; t"vO&+x
data = data[j]; Z6@J-<u
data[j] = temp; 'yjH~F.
} !#s7 F
} [t)i\ }V