[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; @9 tvN}
} I{UB!0H
int i1=l; 7ib<Cb>K
int i2=mid+1; #yOY&W:N
for(int cur=l;cur<=r;cur++){ znpZ0O\!
if(i1==mid+1) 0`zq*OQ
data[cur]=temp[i2++]; Os]M$c_88
else if(i2>r) j~> #{"C
data[cur]=temp[i1++]; qiJ;v1
else if(temp[i1] data[cur]=temp[i1++]; j0NPd^
else <[??\YOc
data[cur]=temp[i2++]; j?ubh{Izm
} 5]ob;tAm
} Nxk'!:
bvvx(?!
} *3oQS"8
/ UBAQ8TR
改进后的归并排序: QZP;k!"w
9:5NX3"p
package org.rut.util.algorithm.support; UZ0O j5B.
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import org.rut.util.algorithm.SortUtil; Z4sjH1W
TyXOd,%zl
/** .b)(_*
* @author treeroot teALd~;
* @since 2006-2-2 <VsZ$
* @version 1.0 ~/[N)RFD
*/ AU\!5+RDB
public class ImprovedMergeSort implements SortUtil.Sort { ZWW}r~d{
pDN,(Ip
private static final int THRESHOLD = 10; #>NZN1
1S@k=EKM
/* GUZi }a|=
* (non-Javadoc) g-uFss
* ee\zU~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \wd`6
*/ `N,Jiw;bw
public void sort(int[] data) { ~<R~Q:T
int[] temp=new int[data.length]; ai2}vR
mergeSort(data,temp,0,data.length-1); 7nIMIkT:
} ZS;kCdL
uf3 gVS_h=
private void mergeSort(int[] data, int[] temp, int l, int r) { I9aber1
int i, j, k; {(Z1JoSl
int mid = (l + r) / 2; EFOQ;q
if (l == r) @35]IxD
return; `/iN%ZKum
if ((mid - l) >= THRESHOLD) `buTP?]4.
mergeSort(data, temp, l, mid); aa!c>"g6
else N.rB-
insertSort(data, l, mid - l + 1); Jc6 D^=
if ((r - mid) > THRESHOLD) Etk<`GRfA
mergeSort(data, temp, mid + 1, r); pswppC6f
else $nN$"
insertSort(data, mid + 1, r - mid); --D`YmB
IC42O_^
for (i = l; i <= mid; i++) { 69L&H!<i:
temp = data; ]kvE+m&p}^
} 3<lDsb(}0A
for (j = 1; j <= r - mid; j++) { yV`vu/3K
temp[r - j + 1] = data[j + mid]; /iy/2x28>
} Vngi8%YWp
int a = temp[l]; _en8hi@Z
int b = temp[r]; m 9Q{)?J7
for (i = l, j = r, k = l; k <= r; k++) { CiFbk&-g
if (a < b) { Ha\hQ'99
data[k] = temp[i++]; s=+G%B'
a = temp; {[dqXG$v `
} else { o)DKP>IM#
data[k] = temp[j--]; JJa?"82FXZ
b = temp[j]; i[lH@fJm_
} O%{>Zo_<
} ],m-,K
} eSf:[^
{^iV<>J
/** )/w2]d/9
* @param data dY^~^<{Lj
* @param l MDt4KD+bZ
* @param i .d,Zx
*/ uWQ.h ,
private void insertSort(int[] data, int start, int len) { p`0Tpgi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l0V@19Ec
} N*;/~bt7P
} H(|v
} qKXn=J/0tA
} vF1$$7k
,$>Z= ~x*
堆排序： U/X ^
s,8%;\!C
package org.rut.util.algorithm.support; !LA#c'
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import org.rut.util.algorithm.SortUtil; u^$ CR
%8/$CR
/** x(Z@R\C-a
* @author treeroot M~4!gKs
* @since 2006-2-2 ~f:fOrLE#
* @version 1.0 }M@pdE
*/ L K$hV"SYb
public class HeapSort implements SortUtil.Sort{ J/ ~]A1fP6
}I0^nv1
/* (non-Javadoc) 6W o7q\"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ubw ]}sfM#
*/ MmB-SR[>P
public void sort(int[] data) { BN67o]*]<
MaxHeap h=new MaxHeap(); :A[/;|&
h.init(data); H#:Yw|t
for(int i=0;i h.remove(); im`^_zebj
System.arraycopy(h.queue,1,data,0,data.length); ){Y2TWW&0
} {z7{ta
6>Fw,$
private static class MaxHeap{ 6 9Cxh
P#C`/%$S
void init(int[] data){ X,b}d#\
this.queue=new int[data.length+1]; B^Q#@[T
for(int i=0;i queue[++size]=data; t&0p@xLQ
fixUp(size); iJK9-k~
} I <7K^j+5:
} jdzV&
}\F>z
private int size=0; 6)8']f
JqO( ]*"Hi
private int[] queue; $i hIHl6'
c}lgWu~
public int get() { >X]<s^
return queue[1]; s?G@k}{
} , /pE*Yk
bP[/
public void remove() { gDrqs>8
SortUtil.swap(queue,1,size--); Lv"83$^S9
fixDown(1); W~qo `r
} uE2Yn`Ha
file://fixdown ME(!xI//JZ
private void fixDown(int k) { fHiCuF
int j; mTt 9 o9E
while ((j = k << 1) <= size) { T &1sfS,
if (j < size %26amp;%26amp; queue[j] j++; E_z@\z MB
if (queue[k]>queue[j]) file://不用交换 Zo`^pQS
break; )xeVoAg
SortUtil.swap(queue,j,k); 7hc(]8eP
k = j; GZ%RfKyQ
} 5D#*lMSP"'
} Ny#%7%(
private void fixUp(int k) { Qj~0vx!
while (k > 1) { pGC`HTo|
int j = k >> 1; = 2k+/0ZbP
if (queue[j]>queue[k]) la-+`
break; ;4 &~i
SortUtil.swap(queue,j,k); Mo/xEB/O
k = j; e1#}/U
} ]3v
} KNnE5f
rtI4W
} F-nt7l
{"<Q?yA2y
} CNwhH)*
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SortUtil： SOm~];[
nD_g84us
package org.rut.util.algorithm; {|fA{ Q_R
NO&OuiN
import org.rut.util.algorithm.support.BubbleSort; # a3Q<%V
import org.rut.util.algorithm.support.HeapSort; H/b(dbs
import org.rut.util.algorithm.support.ImprovedMergeSort; yP@=x!$
import org.rut.util.algorithm.support.ImprovedQuickSort; }E=mZZ)
import org.rut.util.algorithm.support.InsertSort; lIf Our
import org.rut.util.algorithm.support.MergeSort; j6\{j#q
import org.rut.util.algorithm.support.QuickSort; I%ez_VG
import org.rut.util.algorithm.support.SelectionSort; Lh+^GQ
import org.rut.util.algorithm.support.ShellSort; BdceINI
FvkKM+?F
/** XDn$=`2
* @author treeroot YpWu\oP
* @since 2006-2-2 2`z+_DA
* @version 1.0 2XE4w# [j
*/ H;^6%HV1
public class SortUtil { mr*zl*
public final static int INSERT = 1; \+,jM6l}-
public final static int BUBBLE = 2; BKIt,7j
public final static int SELECTION = 3; n4:WM+f4
public final static int SHELL = 4; 71~V*
public final static int QUICK = 5; wxoBq{r;
public final static int IMPROVED_QUICK = 6; L3/ua
public final static int MERGE = 7; j8PK\j[
public final static int IMPROVED_MERGE = 8; x&;SLEM
public final static int HEAP = 9; Awj`6GeJ
f_ ::?
public static void sort(int[] data) { -Ju!2by
sort(data, IMPROVED_QUICK); xGA%/dy,;
} 1.uyu
private static String[] name={ 1*a2s2G '
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CV` I.
}; {d/k0H
| o?@Eh
private static Sort[] impl=new Sort[]{ /5o~$S
new InsertSort(), "e(Nh%t
new BubbleSort(), q[+];
new SelectionSort(), |HL1.;1
new ShellSort(), IE|$>q0Z
new QuickSort(), !rXyw`6N
new ImprovedQuickSort(), v(afaN
new MergeSort(), Fv3fad@x
new ImprovedMergeSort(), #R)$nv:h?^
new HeapSort() {C<ch@sR
}; L.8-nTg"y
s)-=l_4T
public static String toString(int algorithm){ <EE)d@%>v
return name[algorithm-1]; K <0ItNv
} p1Els/|
WUHijHo5(8
public static void sort(int[] data, int algorithm) { UE(%R1Py
impl[algorithm-1].sort(data); 9@!`,Co
} b[/-lNrc
'a0$74fz
public static interface Sort { 0iwx$u7[
public void sort(int[] data); iR_X,&p
} 3c6#?<%0`
\}cEHLq
public static void swap(int[] data, int i, int j) { |=SaI%%Be
int temp = data; ua2SW(C@
data = data[j]; n\d-^ml
data[j] = temp; YpAjZQZ,
} _G`kj{J
} (_d^iZyf