[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; :N*T2mP
} =joXP$n^
int i1=l; e6lOmgHn5
int i2=mid+1; K"7;Y#1g
for(int cur=l;cur<=r;cur++){ K/`RZ!
if(i1==mid+1) z :v, Vu
data[cur]=temp[i2++]; RFY!o<
else if(i2>r) -G#k/Rz6
data[cur]=temp[i1++]; sG2 3[t8
else if(temp[i1] data[cur]=temp[i1++]; 5Q`n6x|
else (JW?azU
data[cur]=temp[i2++]; -P>=WZu
} :-La $I>
} 4rG 7\
1m;*fs
} *]R0z|MW
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改进后的归并排序: mndl~/
l-}5@D[
package org.rut.util.algorithm.support; RJwIN,&1.
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import org.rut.util.algorithm.SortUtil; "H<#91^|
NxO^VUD
/** Z&jb,eh2
* @author treeroot '-33iG
* @since 2006-2-2 /;6@M=6u
* @version 1.0 0WE1}.J<
*/ ?7)(qnbe"
public class ImprovedMergeSort implements SortUtil.Sort { R2THL
Wx$q:$h@q
private static final int THRESHOLD = 10; {@__%=`CCS
Cfo 8gX*
/* Lo5@zNt%W
* (non-Javadoc) F'FZ?*a
* x9"4vp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @B[Cc`IN"
*/ l/zC##1+.
public void sort(int[] data) { ) Zo_6%
int[] temp=new int[data.length]; 9,f<Nb(\
mergeSort(data,temp,0,data.length-1); 7G(f1Y
} V}fKV6 v9
k_>Fw>Y
private void mergeSort(int[] data, int[] temp, int l, int r) { <3=qLm
int i, j, k; NLZZMr
int mid = (l + r) / 2; DnsP7k.8T
if (l == r) YQV?S
return; W^.-C
if ((mid - l) >= THRESHOLD) s%[GQQ-N
mergeSort(data, temp, l, mid); UXPegK!
else Wk#h,p3
insertSort(data, l, mid - l + 1); E8_Le
if ((r - mid) > THRESHOLD) R{uJczu
mergeSort(data, temp, mid + 1, r); s^YTI\L \
else q%k(M[
insertSort(data, mid + 1, r - mid); a`b zFu{
RE $3| z
for (i = l; i <= mid; i++) { |W*@}D
temp = data; %=9yzIjbAt
} uO@3vY',n
for (j = 1; j <= r - mid; j++) { D&l,SD
temp[r - j + 1] = data[j + mid]; UlNfI}#X
} 1Dya?}3
int a = temp[l]; B$TChc3B
int b = temp[r]; @ Rx6 >52>
for (i = l, j = r, k = l; k <= r; k++) { |4S?>e
if (a < b) { !Nl.Vb
data[k] = temp[i++]; 'nWs0iH.
a = temp; 9/1+BQ
} else { p^igscPF6
data[k] = temp[j--]; \!JS7!+
b = temp[j]; .^~l_LkA
} 0vuKGjK
} r}0C8(oq
} AR~$MCR]"k
=v4r M0m,
/** >$naTSJq
* @param data 7ec0Xh1
* @param l p/k<wCm6
* @param i poQdI?ed,
*/ F|?+>c1}
private void insertSort(int[] data, int start, int len) { 9#&W!f*qO|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l^ 0_>R
} hzQ+9-qA
} q)V1{B@
} %U5P}
} xshArJ&A
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堆排序： Y62u%':X
Yn4)Zhkk
package org.rut.util.algorithm.support; ,<$YVXe/
#PslrA. E
import org.rut.util.algorithm.SortUtil; ]A]Ft!`6z
O~h94 B`
/** slge+xq\J
* @author treeroot %l:|2s:
* @since 2006-2-2 d]CviQUq
* @version 1.0 97Zk P=Cq
*/ p:JRQT"A
public class HeapSort implements SortUtil.Sort{ hD6JW-
R+{^@M&
/* (non-Javadoc) Y@]);MyL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HkdN=q
*/ #7]o6
public void sort(int[] data) { -VWCD,c
MaxHeap h=new MaxHeap(); =_8 UZk.
h.init(data); @A2/@]HBm
for(int i=0;i h.remove(); )WVItqQKV
System.arraycopy(h.queue,1,data,0,data.length); eu}Fd@GO
} B;GxfYj
T9z4W]T
private static class MaxHeap{ fW.GNX8
NtY*sUKRD
void init(int[] data){ \D,M2vC~G
this.queue=new int[data.length+1]; QB/7/PW{H\
for(int i=0;i queue[++size]=data; =a)iVXSB]
fixUp(size); Iz}2 ^
} [,<\RviI
} (Ffb&GL
`6Ureui2?
private int size=0; .-SF$U_P*a
5S%C~iB
private int[] queue; vuR5}/Ev
MSZ!W(7,<
public int get() { ~$4]HDg
return queue[1]; -`!_h[
} b JfD\
# 0GGc.
public void remove() { I9}+(6
SortUtil.swap(queue,1,size--); :tMre^oP
fixDown(1); R}DX(T,K
} x.b; +p}=
file://fixdown 'e.q 7Jpd
private void fixDown(int k) { w"cM<Ewu
int j; g7xbyBo7
while ((j = k << 1) <= size) { 8 7RHA $?
if (j < size %26amp;%26amp; queue[j] j++; 7qP4B9S
if (queue[k]>queue[j]) file://不用交换 oGm1d{_-O
break; 7E$eN8H
SortUtil.swap(queue,j,k); 3sZ,|,ueD
k = j; uAu( +zV2
} $gVLk.
} %z*29iKlI
private void fixUp(int k) { <ROpuY\!l
while (k > 1) { hZAG (Z
int j = k >> 1; f49"pTw7
if (queue[j]>queue[k]) <S]KaDu^
break; umQi
SortUtil.swap(queue,j,k); ?}vzLgp
k = j; -a *NbH
} w`L~#yu
} yp=|7
pC*BA<?Rg
} ^ED"rMI
dh&W;zs
} 2m_'z
1"}B]5!
SortUtil： 8+"10q-
*(k%MTG
package org.rut.util.algorithm; i"L}!5
QU:EY'2
import org.rut.util.algorithm.support.BubbleSort; pT4qPta,2
import org.rut.util.algorithm.support.HeapSort; NEA_Plt
import org.rut.util.algorithm.support.ImprovedMergeSort; 79D=d'eA
import org.rut.util.algorithm.support.ImprovedQuickSort; E{uf\Fc
import org.rut.util.algorithm.support.InsertSort; !w q4EV
import org.rut.util.algorithm.support.MergeSort; 42fprt
import org.rut.util.algorithm.support.QuickSort; Q[M (Wqg
import org.rut.util.algorithm.support.SelectionSort; (lb6]MtTHY
import org.rut.util.algorithm.support.ShellSort; R6`*4zS
Sv7 i! j
/** Mx8Gu^FW.d
* @author treeroot On=u#DxQ
* @since 2006-2-2 DU;[btK>
* @version 1.0 I*Vt,JYx
*/ |/VL35b
public class SortUtil { Uz 0W <u3v
public final static int INSERT = 1; tpXa*6
public final static int BUBBLE = 2; SD?BM-&~
public final static int SELECTION = 3; BI};"y
public final static int SHELL = 4; `dDa}b
public final static int QUICK = 5; 2\VAmPG.Zs
public final static int IMPROVED_QUICK = 6; Yx5J$!Ld
public final static int MERGE = 7; !"Qb}g
public final static int IMPROVED_MERGE = 8; 7Rnm%8?T
public final static int HEAP = 9; F\5X7ditD
WSQ[.C
public static void sort(int[] data) { {O)YwT$`
sort(data, IMPROVED_QUICK); ]}kI)34/
} \yNQQ$B
private static String[] name={ lW p~t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EYkj@ .,
}; wf?u(3/%
.(|+oHg<
private static Sort[] impl=new Sort[]{ BDy5J2<<7l
new InsertSort(), tQrS3Hz'nA
new BubbleSort(), .`,F
new SelectionSort(), Uo2+:p
new ShellSort(), Vvyj
new QuickSort(), MM#i t=u
new ImprovedQuickSort(), mzGjRl=O
new MergeSort(), 1?(cmXj
new ImprovedMergeSort(), *(G&B\
new HeapSort() ahA{B1M)n
}; -0$:|p?@^
7rcA[)<'
public static String toString(int algorithm){ ;K_}A4K
return name[algorithm-1]; eIg+PuQD]
} f])M04<
NPm;
public static void sort(int[] data, int algorithm) { 9JPEj-3`g
impl[algorithm-1].sort(data); ocF>LR%P
} jv =EheD
!EOQhh
public static interface Sort { mQ}Gh_'ps
public void sort(int[] data); kn}zgSO
} o@9+mM"B)
w?*z^y@
public static void swap(int[] data, int i, int j) { w$j{Hp6m
int temp = data; DzC Df@TB"
data = data[j]; 6\4Z\82
data[j] = temp; ~.Cv DJy
} @RGDhwS47
} CbOCk:,g5