[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; g8PTGz
} B&D}F=U
int i1=l; 6k#Jpmmr
int i2=mid+1; `ZC<W]WYX/
for(int cur=l;cur<=r;cur++){ y!!2WHvE
if(i1==mid+1) L:@7tc.
data[cur]=temp[i2++]; +\v?d&.f0
else if(i2>r) pb~pN
data[cur]=temp[i1++]; dAy?EO0\7
else if(temp[i1] data[cur]=temp[i1++]; KtNY_&xd
else )7h$G-fe
data[cur]=temp[i2++]; rRFhGQq1m
} D_vbSF)
} itC-4^
Ja9e^`i;
} uu`G 2[t
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改进后的归并排序: 8<Hf"M
5LOo8xN
package org.rut.util.algorithm.support; ,cNLkoN
KZ/=IP=
import org.rut.util.algorithm.SortUtil; K'GBMnjD
/~3r;M
/** thhwN A
* @author treeroot s_mS^`P7
* @since 2006-2-2 yj\Nkh
* @version 1.0 P-9<YN
*/ %$b:X5$Z
public class ImprovedMergeSort implements SortUtil.Sort { z*-2.}&U<
A{A\RSZ0
private static final int THRESHOLD = 10; ?!+MM&c-n
[UH||qW
/* NX}<*b/
* (non-Javadoc) R6(oZph
* 9g<7i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =zz~kon9
*/ #"B\UN
public void sort(int[] data) { :8OZ#D_Hl
int[] temp=new int[data.length]; M]J^N#
mergeSort(data,temp,0,data.length-1); O&Y*pOg
} pej|!oX
9gmW&{6q
private void mergeSort(int[] data, int[] temp, int l, int r) { &wV]"&-
int i, j, k; K57&yVX
int mid = (l + r) / 2; qw^uPs7Uw
if (l == r) adR)Uq9
return; 3xaR@xjS
if ((mid - l) >= THRESHOLD) cH&J{WeZa
mergeSort(data, temp, l, mid); ,LnII
else w9bbMx
insertSort(data, l, mid - l + 1); ;<ZLcTL
if ((r - mid) > THRESHOLD) S Em Q@1
mergeSort(data, temp, mid + 1, r); |AozR ~
else N(Tz%o4
insertSort(data, mid + 1, r - mid); @"^0%/2-
hbY5l}\5
for (i = l; i <= mid; i++) { N'GeHByIT
temp = data; |EJD3&
} BW$"`T@c6~
for (j = 1; j <= r - mid; j++) { (^Y~/
temp[r - j + 1] = data[j + mid]; &__es{;P
} r/u A.Aou^
int a = temp[l]; y#3j`. $3p
int b = temp[r]; ?k(7 LX0j
for (i = l, j = r, k = l; k <= r; k++) { `)_dS&_\
if (a < b) { r2,.abo
data[k] = temp[i++]; N(Fp0
a = temp; UdpF@Q
} else { oY933i@l)P
data[k] = temp[j--]; zdYy^8V|z
b = temp[j]; =\H!GT
} d^{RQ
} |Uc_G13Y{D
} (pv+c,
6G[4rD&
/** .K1FKC$C
* @param data 8@MV%MVy$
* @param l vH :LQ!2
* @param i ww],y@da
*/ R}*_~7r5
private void insertSort(int[] data, int start, int len) { 8Djc c z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *%%g{ 3$
} VHIOwzC
} 0Ziw_S\d&s
} P\1L7%*lU
} ;V*l.gr'2
a,k>Q`
堆排序： i3@)W4{
(>nGQS]H
package org.rut.util.algorithm.support; w9< R#y[A
&L'Dqew,*
import org.rut.util.algorithm.SortUtil; {xXsBh Y
>n'o*gZM
/** 1H6<[iHW
* @author treeroot "@iK' c^
* @since 2006-2-2 :bwjJ}F
* @version 1.0 pKpUXfQu
*/ X-K=!pET
public class HeapSort implements SortUtil.Sort{ wn/_}]T
L~lxXTG\
/* (non-Javadoc) /|C*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u)}$~E>
*/ =8AO:
public void sort(int[] data) { Lr$go6s
MaxHeap h=new MaxHeap(); dfKF%27
h.init(data); pNepC<rY
for(int i=0;i h.remove(); xhVO3LW'
System.arraycopy(h.queue,1,data,0,data.length); jB%lB1Q|
} n<O}hM ZT
2bw_IT
private static class MaxHeap{ }$SavB#SBP
k_ & :24Lj
void init(int[] data){ mr*JJF0Z
this.queue=new int[data.length+1]; ON=@O
for(int i=0;i queue[++size]=data; 7%Gwc?[x
fixUp(size); J??-j
} g jDh?I
} 1OCeN%4]Qk
o<BOYrS
private int size=0; ?!A7rb/tj
5m\<U`
private int[] queue; 8']M^|1
e7Xeo+/
public int get() { 6#7Lm) g8
return queue[1]; m$}R%
} Wbr|_W
!t$'AoVBq
public void remove() { r`W)0oxD
SortUtil.swap(queue,1,size--); EofymAi%
fixDown(1); >,gg5<F-E
} x@P y>f2
file://fixdown 52:HNA\E/
private void fixDown(int k) { :61Tun
int j; uki#/GzaO
while ((j = k << 1) <= size) { Cl;oi}L
if (j < size %26amp;%26amp; queue[j] j++; Rdvk ml@@
if (queue[k]>queue[j]) file://不用交换 DFZkh^PFd
break; I`-8Air5f
SortUtil.swap(queue,j,k); 5na~@-9p
k = j; Uc7mOa}4
} S?1AFI9{
} `Q|*1
private void fixUp(int k) { (eI5_`'VC
while (k > 1) { JjPKR?[>
int j = k >> 1; PF)jdcX
if (queue[j]>queue[k]) K1mPr^3rC
break; *"?l]d
SortUtil.swap(queue,j,k); *6sl
k = j; Cn'(<bl
} *SU\ABcov
} U`R5'Tf;
R "n5
} ^U `[(kz=
Ixb=L(V
} 2|3)S`WZl
:o0JY= 5
SortUtil： ;&<{ey
"?]{%-u
package org.rut.util.algorithm; iHeN9 cl
z:8eEq3w
import org.rut.util.algorithm.support.BubbleSort; 3h;{!|-3
import org.rut.util.algorithm.support.HeapSort; <sWprR
import org.rut.util.algorithm.support.ImprovedMergeSort; h1B? 8pD
import org.rut.util.algorithm.support.ImprovedQuickSort; qaiNz S@q
import org.rut.util.algorithm.support.InsertSort; &+Z,hs9%
import org.rut.util.algorithm.support.MergeSort; !\zWF
import org.rut.util.algorithm.support.QuickSort; jN{Xfjmfv
import org.rut.util.algorithm.support.SelectionSort; sD{Wxv
import org.rut.util.algorithm.support.ShellSort; F_w Z"e6
P\yDa*m
/** {P*pkc
* @author treeroot \|H!~)h$1
* @since 2006-2-2 %eX{WgH
* @version 1.0 E@@5BEB ~
*/ 'Y*E<6:
public class SortUtil { ',Y.v"']4
public final static int INSERT = 1; H5DC[bZMb%
public final static int BUBBLE = 2; xbdN0MAU
public final static int SELECTION = 3; rM`X?>iT+
public final static int SHELL = 4; iq8GrdL"
public final static int QUICK = 5; {IxA)v-`
public final static int IMPROVED_QUICK = 6; jr)1(**
public final static int MERGE = 7; (!ZM{Js%
public final static int IMPROVED_MERGE = 8; Q\^O64geD
public final static int HEAP = 9; S=5<^o^h3
OVm\
public static void sort(int[] data) { /xsF90c\h
sort(data, IMPROVED_QUICK); }+)fMZz
} gp5_Z-me
private static String[] name={ 9!6f-K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^N7e76VwR
}; sF|5XjQ
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private static Sort[] impl=new Sort[]{ RHmgD;7`
new InsertSort(), >"|B9Woc
new BubbleSort(), %SX|o-B~.o
new SelectionSort(), oC<.=2]
new ShellSort(), g<l1zo`_
new QuickSort(), JSkLEa~<
new ImprovedQuickSort(), S)cLW~=z
new MergeSort(), I9/W;# *~
new ImprovedMergeSort(), r"C
new HeapSort() SQ44
}; ^Y=\#-Dd
k3u"A_"c
public static String toString(int algorithm){ G0/4JSH
return name[algorithm-1]; [<2<Y
} P^A!.}d
{9?JjA
public static void sort(int[] data, int algorithm) { uD}2<$PP
impl[algorithm-1].sort(data); fmQ_P.c
} BcL{se9<
~<O7$~
public static interface Sort { :yRo3c
public void sort(int[] data); D ~stM
} `7[EKOJ3g
5"CZh.J
public static void swap(int[] data, int i, int j) { igIRSN}h
int temp = data; 3Ndq>
data = data[j]; 8cU}I4|
data[j] = temp; y+X2Pl
} M.x=<:upp
} gnFr}L&j