[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; 8v:T.o;<
} bg!/%[ {M
int i1=l; ~8PZ5;g
int i2=mid+1; 2]z8:a
for(int cur=l;cur<=r;cur++){ M92dZ1+6
if(i1==mid+1) GoJ.&aH $
data[cur]=temp[i2++]; 6LvW?z(J
else if(i2>r) QJZK|*
data[cur]=temp[i1++]; qLO4#CKCL6
else if(temp[i1] data[cur]=temp[i1++]; +jAGGv^)
else fW{(lPx
data[cur]=temp[i2++]; {0L1X6eg
} `xKp%9
} T.])diuvj-
6Pz4\uE=
} 'K$[^V
R"-mKT}
改进后的归并排序: ^PDJ0k/u1
|J1$=s
package org.rut.util.algorithm.support; vHgi<@u
5[8xV%>;
import org.rut.util.algorithm.SortUtil; Lz |?ek7Q
NG=@ -eu
/** zN[hkmh
* @author treeroot +! ]zA4x
* @since 2006-2-2 ny]?I
* @version 1.0 } +TORR?
*/ )cX*I gO
public class ImprovedMergeSort implements SortUtil.Sort { ~IY%
Z&G+bdA>,
private static final int THRESHOLD = 10; P9/q|>F
>1.X*gi?-
/* K='z G*$l
* (non-Javadoc) Z]A{ d[
* U#0Q)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zUt'QH7E.
*/ sG(~^hJ_
public void sort(int[] data) { H[NSqu.s
int[] temp=new int[data.length]; a1g,@0s
mergeSort(data,temp,0,data.length-1); 5 )A1\
} jrCfWa}z
V)3KS-
private void mergeSort(int[] data, int[] temp, int l, int r) { 5^}\4.eXo
int i, j, k; -zCH**y%1
int mid = (l + r) / 2; !`M,XSp(
if (l == r) -{KQr1{5UM
return; B*eC3ok3z
if ((mid - l) >= THRESHOLD) kS%Ydy#:'
mergeSort(data, temp, l, mid); Ozw.siD
else l94b^W}1)W
insertSort(data, l, mid - l + 1); mbKZJ{|4s
if ((r - mid) > THRESHOLD) kq?Ms|h
mergeSort(data, temp, mid + 1, r); 0B[="rTS7#
else v|Pv 03%?7
insertSort(data, mid + 1, r - mid); bYcV$KJk
V"[g.%%Y
for (i = l; i <= mid; i++) { Z< 1
temp = data; }V'}E\\
} $1SPy|y
for (j = 1; j <= r - mid; j++) { *-#&K\
temp[r - j + 1] = data[j + mid]; %7QV&[4!
} 'Y?"{HZ
int a = temp[l]; ~b(i&DVK
int b = temp[r]; 3(``#7
for (i = l, j = r, k = l; k <= r; k++) { QpF;:YX^3
if (a < b) { .14~J6
data[k] = temp[i++]; ajve~8/&
a = temp; M#ZcY
} else { T*I{WW
data[k] = temp[j--]; .L+6 $8m
b = temp[j]; nI[os
} tCw<Ip
} y3vdUauOn
} dR K?~1
bes<qy
/** Zj_b>O-V
* @param data # '=a=8-$
* @param l jY&k
* @param i uY0lR:|
*/ T!uM+6|Y
private void insertSort(int[] data, int start, int len) { ]yV!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )"qa kT
} c& <Fr[AK
} dLH(D: `
} Upx G@b
} O],T,Z?z
LhN|1f:9:
堆排序： XYQ/^SI!:
wDw[RW3
package org.rut.util.algorithm.support; N[?N5~jG
OwuE~K7b{
import org.rut.util.algorithm.SortUtil; aasoW\UG
5b5x!do
/** |Yx~;q:
* @author treeroot +u.1 ;qF
* @since 2006-2-2 {GvJZ!,RCg
* @version 1.0 SfA\}@3
*/ \S_Ou
public class HeapSort implements SortUtil.Sort{ G3txj
_ "E$v&_
/* (non-Javadoc) {M3qLf~z#C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K~uXO
*/ !H#bJTXB
public void sort(int[] data) { O3;u G.:1
MaxHeap h=new MaxHeap(); lVd^ ^T*fh
h.init(data); 84$nT>c
for(int i=0;i h.remove(); ?xA:@:l/
System.arraycopy(h.queue,1,data,0,data.length); XFg9P}"
} :X"?kK0V
E~,F
private static class MaxHeap{ Q[Z8ok
}I2wjO
void init(int[] data){ &)2i[X
this.queue=new int[data.length+1]; 0mpX)S
for(int i=0;i queue[++size]=data; #akpXdXs
fixUp(size); -N6f1>}pE
} ; a/X<
} }q`ts=dlGt
+00b)TF
private int size=0; UMv.{iEj
Uq[>_"}
private int[] queue; uyO/55;HO
f0A{W/0n
public int get() { 'SO %)B
return queue[1]; :8I9\eet3
} SII;n2[Ze
,NOsFO-`<
public void remove() { I?]ohG K
SortUtil.swap(queue,1,size--); Ac96 [
fixDown(1); ^pxX]G]
} v5/~-uRL%
file://fixdown )}g(b=
private void fixDown(int k) { yZ @"\Z!
int j; Ut*`:]la
while ((j = k << 1) <= size) { =FlDb 5t{
if (j < size %26amp;%26amp; queue[j] j++; VdPtPq1
if (queue[k]>queue[j]) file://不用交换 dFRsm0T
break; rr+|Zt Y
SortUtil.swap(queue,j,k); VQ"hUX8
k = j; \}+_Fo/
} %!]@J[*1
} @V(*65b2
private void fixUp(int k) { 6rh5h:
while (k > 1) { @u.58H& }R
int j = k >> 1; !4]TXH0f
if (queue[j]>queue[k]) cT<1V!L4
break; \@WDV
SortUtil.swap(queue,j,k); |pm7_[
k = j; Bs13^^hu
} g=39C>
} 4<9=5q]
*,3SGcYdJj
} ,qA(\[
< nXL
} u0 P|0\
a<@1-j<
SortUtil： .Fs7z7?Y
2n3W=dF
package org.rut.util.algorithm; }]e-{C}
?Fi=P#
import org.rut.util.algorithm.support.BubbleSort; ]|!OP
import org.rut.util.algorithm.support.HeapSort; b+,';bW
import org.rut.util.algorithm.support.ImprovedMergeSort; Mxe}B'
import org.rut.util.algorithm.support.ImprovedQuickSort; 5G::wuxk
import org.rut.util.algorithm.support.InsertSort; S-P/+K6
import org.rut.util.algorithm.support.MergeSort; ,">]`|?
import org.rut.util.algorithm.support.QuickSort; 7_%"BVb"
import org.rut.util.algorithm.support.SelectionSort; {`J)j6;
import org.rut.util.algorithm.support.ShellSort; Hv!U|L
/rMI"khB
/** t'?.8}?)I&
* @author treeroot PjZvQ\Z
* @since 2006-2-2 ?<V?wsp
* @version 1.0 io _1Y]N
*/ -!q:p&c
public class SortUtil { x8wD0D
public final static int INSERT = 1; 8u"!dq
public final static int BUBBLE = 2; Vc_'hz]Z
public final static int SELECTION = 3; T~--92[
public final static int SHELL = 4; R(('/JC
public final static int QUICK = 5; Qi^Z11
public final static int IMPROVED_QUICK = 6; <L`KzaA
public final static int MERGE = 7; 4\y/'`xm)6
public final static int IMPROVED_MERGE = 8; 2w59^"<,
public final static int HEAP = 9; |s'Po^Sy
&atuK*W>
public static void sort(int[] data) { _ <WJ7
sort(data, IMPROVED_QUICK); 2#P*,
} 3wOZ4<B
private static String[] name={ ?6yjy<D)$e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z,Medw6[
}; @GkILFN
3_txg>P"
private static Sort[] impl=new Sort[]{ 4~y(`\0?4
new InsertSort(), tro7Di2Q
new BubbleSort(), |*:'TKzNS
new SelectionSort(), mX_a^_[G
new ShellSort(), ^.KwcXr
new QuickSort(), yGWxpzmRS
new ImprovedQuickSort(), IT(lF
new MergeSort(), m4aB*6<lq
new ImprovedMergeSort(), ZZk=E4aae
new HeapSort() >{N9kWY
}; Kh,V.+7k
J]v%q,"
public static String toString(int algorithm){ O]lSWEe
return name[algorithm-1]; e91aK
} %JXE5l+pJ
7{e% u#
public static void sort(int[] data, int algorithm) { !>v2i"
impl[algorithm-1].sort(data); {wO3<9
} L0*nm.1X
~R_ztD+C(
public static interface Sort { lV`Q{bd+
public void sort(int[] data); H(bs$C4F
} F5?m6`g?
EKA#|^Q:NX
public static void swap(int[] data, int i, int j) { cVubb}ou
int temp = data; Rec6c&5_
data = data[j]; }vZ+A
data[j] = temp; ' qWALu
} m5L-67[sB
} +g` 'J$