[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; jlhyn0
} ?fO 2&)r
int i1=l; irqNnnMGEa
int i2=mid+1; Z_%9LxZlyj
for(int cur=l;cur<=r;cur++){ }zA kUt
if(i1==mid+1) K6vF}A|
data[cur]=temp[i2++]; k-o(Q"[ '
else if(i2>r) x2@Q5|a
data[cur]=temp[i1++]; hXxgKi%
else if(temp[i1] data[cur]=temp[i1++]; q]1HCWde
else /jBjqE;_
data[cur]=temp[i2++]; .#py5&`%
} MjGeH>c
} gEWKM(5B}
fpj,~+
} G@4ro<
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改进后的归并排序: {Ac5(li_
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package org.rut.util.algorithm.support; H.sYy-_]F
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import org.rut.util.algorithm.SortUtil; C~C}b
]QB<N|ps
/** (eTe`
* @author treeroot VBHDI{HzRv
* @since 2006-2-2 v%mAU3M
* @version 1.0 *3,GQ%~/z
*/ x3X^\Ig
public class ImprovedMergeSort implements SortUtil.Sort { RTHe#`t
z(-j%?
private static final int THRESHOLD = 10; AOh\%|}
*}yOL [
/* :n1^Xw0q
* (non-Javadoc) P[;<,U;'HO
* Q> Lh.U,{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zF+NS]XK
*/ ]h]|PdN
public void sort(int[] data) { fSe$w#*I
int[] temp=new int[data.length]; -2)6QKh~D
mergeSort(data,temp,0,data.length-1); !/1aot^(
} *'b3Z3c,;
:>@6\
private void mergeSort(int[] data, int[] temp, int l, int r) { W u4` 3
int i, j, k; ;0)|c}n+.5
int mid = (l + r) / 2; }N^A (`L
if (l == r) Idy{(Q
return; vr/O%mDp
if ((mid - l) >= THRESHOLD) )qgcz<p?W
mergeSort(data, temp, l, mid); ^qn,b/>L
else iL^bf*
insertSort(data, l, mid - l + 1); B@v\tpR
if ((r - mid) > THRESHOLD) s~A#B)wB
mergeSort(data, temp, mid + 1, r); `WjRb
else =F!_ivV
insertSort(data, mid + 1, r - mid); x,f=J4yco
=dVPx<l5
for (i = l; i <= mid; i++) { <!+T#)Qi
temp = data; Td7f
} Z0Tpz2m
for (j = 1; j <= r - mid; j++) { m)5,ut/
temp[r - j + 1] = data[j + mid]; pN-l82]'
} !,;>)R
int a = temp[l]; 4|?y [j6
int b = temp[r]; ~ULD{Ov'F
for (i = l, j = r, k = l; k <= r; k++) { d&!;uzOx
if (a < b) { ,BUDo9h
data[k] = temp[i++]; 7Wd}H Z
a = temp; k0%*{IVPN
} else { 0|1)cO}Dy
data[k] = temp[j--]; ~OuKewr\
b = temp[j]; qDMVZb-(#
} L7~9u|7a#
} utH,pGs C.
} Y[(U~l,a+
hJkP_(+J\
/** SN${cs%
* @param data C}i1)
* @param l 0QWc1L
* @param i ~1_v;LhH5+
*/ b7]MpL
private void insertSort(int[] data, int start, int len) { 0j=xWC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q_5hKipd\b
} 7W)*IJ
} Ukf4Q\@w
} X?2ub/Nr#Y
} gpIq4Q<
.u+ZrA#
堆排序： :A~6Gk92A
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package org.rut.util.algorithm.support; -y@# ^SrJ
4pYscB
import org.rut.util.algorithm.SortUtil; <BUKTRq
;9WS#>o
/** Yqpe2II7
* @author treeroot n54}WGo>9
* @since 2006-2-2 e`N/3q7
* @version 1.0 GmjTxNU@
*/ ws^ 7J/8
public class HeapSort implements SortUtil.Sort{ !>n^ ;u
i!|OFU6
/* (non-Javadoc) BZ'63
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6k1;62Ntk
*/ kYwV0xQ
public void sort(int[] data) { Hp#IOsP~
MaxHeap h=new MaxHeap(); ^HO'"/tB@D
h.init(data); z0yPBt1W
for(int i=0;i h.remove(); l\Q--
System.arraycopy(h.queue,1,data,0,data.length); W8@o7svrh
} M%U1?^j8
+2qCH^80
private static class MaxHeap{ z 1~2w:
VL[}
void init(int[] data){ Wu{cE;t
this.queue=new int[data.length+1]; vs*Q {
for(int i=0;i queue[++size]=data; ##_`)/t,
fixUp(size); 1N3qMm^
} h$[tEmD%
} ]J]~i[
\dB)G<_
private int size=0; ,V>7eQt?
sI&|qK-(
private int[] queue; <Qx]"ZP%
Hzn6H4Rc
public int get() { R6xJw2;_
return queue[1]; !4?QR
} h;+bHrKji
|qp^4vq.p
public void remove() { SU8vz/\%y
SortUtil.swap(queue,1,size--); %o4d(C B
fixDown(1); KKFV+bK)
} :iKk"r,2P[
file://fixdown xE0'eC5n^
private void fixDown(int k) { l-~ o&n
int j; #9's^}i
while ((j = k << 1) <= size) { eeix-Wt*E
if (j < size %26amp;%26amp; queue[j] j++; nQHQVcDs8
if (queue[k]>queue[j]) file://不用交换 54^2=bp
break; OG!+p}yD]
SortUtil.swap(queue,j,k); W%&[gDp
k = j; 0q!
} ?'jRUfl
} s)eU^4m
private void fixUp(int k) { UtpK"U$XOU
while (k > 1) { R9-Ps qmF
int j = k >> 1; lk(q>dvK
if (queue[j]>queue[k]) Z%_m<Nf8T
break; s|q]11r+H
SortUtil.swap(queue,j,k); V1d{E 0lM
k = j; %F.^cd"
} RaX:&PE
} JKJ+RkXf3
]"T1clZKd(
} u A=x~-I
V 5
} K+F]a]kld
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SortUtil： LQr+)wI
)W0zu\fL =
package org.rut.util.algorithm; =KCAHNr4?
xO` `X<
import org.rut.util.algorithm.support.BubbleSort; K'DRX85F
import org.rut.util.algorithm.support.HeapSort; F?3zw4Vt~
import org.rut.util.algorithm.support.ImprovedMergeSort; HOPi2nf{
import org.rut.util.algorithm.support.ImprovedQuickSort; @`D`u16]i
import org.rut.util.algorithm.support.InsertSort; 7hq$vI%0
import org.rut.util.algorithm.support.MergeSort; xDtJ&6uFw
import org.rut.util.algorithm.support.QuickSort; m7n8{J1O2
import org.rut.util.algorithm.support.SelectionSort; EPn0ZwnS:M
import org.rut.util.algorithm.support.ShellSort; Ra~|;( %d
{~=Z%Cj2Q
/** BT3X7Cx
* @author treeroot (G#QRSXc\
* @since 2006-2-2 s2N~p^
* @version 1.0 1P '_EJ]M
*/ UbDRE[^P
public class SortUtil { $HE ?B{
public final static int INSERT = 1; %1jlXa
public final static int BUBBLE = 2; gA/8Df\G:l
public final static int SELECTION = 3; xUw)mUn@N
public final static int SHELL = 4; -Y:^<C^^&8
public final static int QUICK = 5; VW%eB
public final static int IMPROVED_QUICK = 6; 2 yY.rs
public final static int MERGE = 7; 0;6^fiSY;
public final static int IMPROVED_MERGE = 8; uY"Bgz:=d
public final static int HEAP = 9; { d*?O
sDF5
public static void sort(int[] data) { ' Akt5q
sort(data, IMPROVED_QUICK); ?_<14%r;
} IFd2r;W8
private static String[] name={ F2bAo6~R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '{I YANVT
}; 5m(V(@a3
fcLVE
private static Sort[] impl=new Sort[]{ TQjM3Ri=V
new InsertSort(), &nXa/XIZ_
new BubbleSort(), CEMe2~
new SelectionSort(), Ga9^+.j
new ShellSort(), 7L"Pe'Hw
new QuickSort(), +bC=yR
new ImprovedQuickSort(), r'/H3
new MergeSort(), rF>7 >wq
new ImprovedMergeSort(), FsXqF&{
new HeapSort() N:]Ud(VRM
}; 3R|C$+Sc
+. ` I
public static String toString(int algorithm){ )8244;
return name[algorithm-1]; *^WY+DV
} 017(I:V?(:
)K"7=TvY
public static void sort(int[] data, int algorithm) { EWX!:BKf
impl[algorithm-1].sort(data); p0b2n a !
} no`>r}C
}@'Zt6+tS
public static interface Sort { zK@DQ5
public void sort(int[] data); due'c!wW
} bFt$u]Yvo
' 6#en9{L
public static void swap(int[] data, int i, int j) { Kz`g Q|S
int temp = data; { :~&#D
data = data[j]; #383W)n
data[j] = temp; IBY(wx[5S
} }.$5'VGO
} s<;kTReA