[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; R/kfbV-b
} m";?B1%x
int i1=l; 'Jl3%axR
int i2=mid+1; 15"[MX A
for(int cur=l;cur<=r;cur++){ D<(VP{,G
if(i1==mid+1) JJu}Ed_
data[cur]=temp[i2++]; Vl0Y'@{
else if(i2>r) e)A{ {wD/
data[cur]=temp[i1++]; !&5B&w{u~!
else if(temp[i1] data[cur]=temp[i1++]; Jb]22]
else Wo<kKkx2
data[cur]=temp[i2++]; :0(:}V3z\
} CC XOxd
} 1'SpJL1u~
)C%S`d<%,
} g/`z.?
K#a_7/!v/
改进后的归并排序: rwY{QBSf
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package org.rut.util.algorithm.support; ,<<HkEMS
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import org.rut.util.algorithm.SortUtil; RbJbVFz8C
q]OgT4ly
/** 8t1,_,2'
* @author treeroot 9~yp=JOV@
* @since 2006-2-2 a\Dw*h?b~
* @version 1.0 I_On0@%T5b
*/ bh UghHT
public class ImprovedMergeSort implements SortUtil.Sort { Rmh u"N/q
<k7q9"\4
private static final int THRESHOLD = 10; J|N>}di
HOlMj!.
/* 4nGr?%>
* (non-Javadoc) 8|-064i>
* 95oh}c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <O9.GHV1v
*/ w"A%@<V3Ec
public void sort(int[] data) { k~pbXA*u
int[] temp=new int[data.length]; Nj`Miv o
mergeSort(data,temp,0,data.length-1); o&Sv2"2
} `&>CK`%Xu
m'5rzZP
private void mergeSort(int[] data, int[] temp, int l, int r) { <R8!fc{`
int i, j, k; x<h-F
int mid = (l + r) / 2; O%rt7qV"g2
if (l == r) Tg/rV5@ka
return; 07A2@dx
if ((mid - l) >= THRESHOLD) l5,}yTUta
mergeSort(data, temp, l, mid); bb"x^DtT
else L+TM3*a*
insertSort(data, l, mid - l + 1); zq4)Uab*
if ((r - mid) > THRESHOLD) znu[i&\=
mergeSort(data, temp, mid + 1, r); i`" L?3T
else yMBFw:/o
insertSort(data, mid + 1, r - mid); WkK.ON^
I>45xVA
for (i = l; i <= mid; i++) { 'tun;Y
temp = data; 8ubb~B;
} dJUI.!hv;
for (j = 1; j <= r - mid; j++) { )}5f'TK
temp[r - j + 1] = data[j + mid]; O -N> X
} =-8y=
int a = temp[l]; )GF>]|CG
int b = temp[r]; Dp" xO<PE2
for (i = l, j = r, k = l; k <= r; k++) { eHHqm^1z
if (a < b) { (vr v-4
data[k] = temp[i++]; 6;hZHe'W
a = temp; %XK<[BF
} else { \%/zf
data[k] = temp[j--]; 6'QlC+E
b = temp[j]; j[\aGS7u
} s14;\
} XyE%<]
} qjVhBu7A
iV8O<en&i
/** <[<]+r&*
* @param data pPtw(5bH
* @param l +*P;Vb6D
* @param i yB,{:kq7D
*/ :gacP?
private void insertSort(int[] data, int start, int len) { /2AeJH\-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q>[GD(8k
} %2`geN<
} wNhtw'E8
} zHW}A `Rz
} ,.PmH.zjmR
?ZlN$h^
堆排序： CAV Q[r5y
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package org.rut.util.algorithm.support; 'Z ,T,zW
g;PZ$|%&s>
import org.rut.util.algorithm.SortUtil; BSbi.@@tp
T1c.ER}17
/** jq"iLgEMO
* @author treeroot 6qp' _?
* @since 2006-2-2 NlV,] $L1T
* @version 1.0 F~${L+^
*/ !ie'}|c
public class HeapSort implements SortUtil.Sort{ $09PZBF,i
/J`ZO$
/* (non-Javadoc) 8lcB.M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '*,P33h9<!
*/ -p2 =?a
public void sort(int[] data) { f+j-M|A
MaxHeap h=new MaxHeap(); (DrDWD4_
h.init(data); ~q05xy8
for(int i=0;i h.remove(); /E0/)@pDq
System.arraycopy(h.queue,1,data,0,data.length); )#_:5^1
} qLh[BR
(L7@ez
private static class MaxHeap{ T|FF&|Pk
E]IPag8C
void init(int[] data){ CPS1b
this.queue=new int[data.length+1]; t+`>zux5(T
for(int i=0;i queue[++size]=data; r>gU*bs(
fixUp(size); (jB_uMuS
} -Rz%<`
} biw2f~V
g_F-PT>($
private int size=0; +axpIjI'
VUE6M\&z>
private int[] queue; q'~F6$kv5
p{k^)5CR/
public int get() { 3 h~U)mg
return queue[1]; 4c/.#?
} (S4[,Sx6E
CEr*VsvjsU
public void remove() { gm}[`GMU
SortUtil.swap(queue,1,size--); yQM<(;\O
fixDown(1); Da8{==
} ~*,e&I
file://fixdown 1#2B1&
private void fixDown(int k) { M~k2Y$}R
int j; 4ZN&Yf`
while ((j = k << 1) <= size) { js<}>wD7<
if (j < size %26amp;%26amp; queue[j] j++; Msea kF
if (queue[k]>queue[j]) file://不用交换 G'qGsKf\
break; ;]+p>p-#
SortUtil.swap(queue,j,k); V]I+>Zn| 7
k = j; ??tNMr5{[
} _pS!sY~d
} 7y2-8eL
private void fixUp(int k) { L-v-KO6
while (k > 1) { K4>nBvZ?v
int j = k >> 1; >4N=P0=
if (queue[j]>queue[k]) (fJ.o-LQ
break; +rA:/!b)Y
SortUtil.swap(queue,j,k); 6V@?/B
k = j; ?}g#Mc
} )]~;Ac^x
} ~GZpAPg*
2%F!aeX
} N)H _4L
ek3,ss3
} ^w*$qzESy
Zc Y* TGx
SortUtil： 21\t2<"
!O-9W=NJ
package org.rut.util.algorithm; Skn2-8;10
7,![oY[
import org.rut.util.algorithm.support.BubbleSort; ahJu+y
import org.rut.util.algorithm.support.HeapSort; !W ,pjW%Y
import org.rut.util.algorithm.support.ImprovedMergeSort; |zaYIVE[
import org.rut.util.algorithm.support.ImprovedQuickSort; e//q`?ys
import org.rut.util.algorithm.support.InsertSort; E:C-k^/[Y
import org.rut.util.algorithm.support.MergeSort; )Ap0" ?q
import org.rut.util.algorithm.support.QuickSort; sF=8E8qa
import org.rut.util.algorithm.support.SelectionSort; D+:}D*_&
import org.rut.util.algorithm.support.ShellSort; t/HUG#W{
%ymM#5A
/** j%y)%4F8
* @author treeroot yA#-}Y|]b
* @since 2006-2-2 > l@o\
* @version 1.0 wK[Xm'QTPJ
*/ xf?6_=
public class SortUtil { t:h~p-&QB
public final static int INSERT = 1; B1C"F-2d
public final static int BUBBLE = 2; $sX X6K),
public final static int SELECTION = 3; 82bOiN15
public final static int SHELL = 4; `mfN3Q*[c
public final static int QUICK = 5; c8 xZT
public final static int IMPROVED_QUICK = 6; d].(x)|st
public final static int MERGE = 7; Gap\~Z@L
public final static int IMPROVED_MERGE = 8; 'Oe}Ja
public final static int HEAP = 9; "ccP,#Y
~dO&e=6Hk
public static void sort(int[] data) { z2GT9
sort(data, IMPROVED_QUICK); u3>Dvl@
} s{]2~Z^2od
private static String[] name={ a#qC.,$A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" edW:(19}
}; Z} 8m]I
0f<$S$~h
private static Sort[] impl=new Sort[]{ ee=d*)
new InsertSort(), <&$:$_ah
new BubbleSort(), a &89K
new SelectionSort(), &74*CO9B9
new ShellSort(), qU) pBA
new QuickSort(), Q]u*Oels
new ImprovedQuickSort(), #ir~v>J||
new MergeSort(), jcT
new ImprovedMergeSort(), CAPPOh
new HeapSort() @9wug!,
}; ;1&7v
Gpauy=4f
public static String toString(int algorithm){ %HNe"7gk
return name[algorithm-1]; 6_w;dnVA
} FLI0C
q["T6
public static void sort(int[] data, int algorithm) { ~/B[;#
impl[algorithm-1].sort(data); {U,q!<@mq
} 5l&9BS&
4X5Tyv(Dp
public static interface Sort { EZ.|6oug\
public void sort(int[] data); Yc*Ex-s
} @%5$x]^
NzP5s&,C69
public static void swap(int[] data, int i, int j) { 9mT;>mE
int temp = data; =[$zR>o*%
data = data[j]; *:*Kdt`'G
data[j] = temp; o y'GAc/
} pd[?TyVK;
} kdX]Afyj