[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; o90SXa&l/
} ePdM9%
int i1=l; F@Y)yi?z
int i2=mid+1; eZ5UR014
for(int cur=l;cur<=r;cur++){ "~Twx]Z
if(i1==mid+1) xx0s`5
data[cur]=temp[i2++]; [hTGWT3
else if(i2>r) lc>)7UF
data[cur]=temp[i1++]; A`Q'I$fj
else if(temp[i1] data[cur]=temp[i1++]; Qmle0ae
else Uhfm@1 cz&
data[cur]=temp[i2++]; 'bGL@H
} Zq=t&$*
} Ug_5INK
Qna ^Ry?6)
} !-b4@=f:
Z)EmX=
改进后的归并排序: &o{I9MD
La48M'u
package org.rut.util.algorithm.support; J;h4)w~9H3
K&0op 4&
import org.rut.util.algorithm.SortUtil; [RCUP.
Gc>bli<-
/** ez=$]cln
* @author treeroot [?x9NQ{
* @since 2006-2-2 WLW'.
* @version 1.0 s|Ls
*/ @iK=1\-2
public class ImprovedMergeSort implements SortUtil.Sort { 0h-holUf}~
biG=4?Xl
private static final int THRESHOLD = 10; ^0"NcOzzxl
zqfv|3-!}
/* DrLNY"Zq
* (non-Javadoc) }1]/dCv
* :bI4HXT3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }3:DJ(Y
*/ 3#huC=zbf
public void sort(int[] data) { >C y
int[] temp=new int[data.length]; 0l3v>ty
mergeSort(data,temp,0,data.length-1); 9;2PoW8
} vl*CU"4
ZOc1 vj
private void mergeSort(int[] data, int[] temp, int l, int r) { fiOc;d8
int i, j, k; 3{RuR+yi
int mid = (l + r) / 2; ";}Lf1M9
if (l == r) x3=W{Fv@4
return; ^6[KzE#*
if ((mid - l) >= THRESHOLD) }uo5rB5D
mergeSort(data, temp, l, mid); 8v@6 &ras@
else o0$R|/>i
insertSort(data, l, mid - l + 1); S>}jsP:V
if ((r - mid) > THRESHOLD) 26JP<&%L
mergeSort(data, temp, mid + 1, r); 3xef>Xv=
else *k==2figz
insertSort(data, mid + 1, r - mid); g]85[xz
)hmU/E@
for (i = l; i <= mid; i++) { geU-T\1[l
temp = data; _6"vPN
} Pc>$[kT0
for (j = 1; j <= r - mid; j++) { r)Ts(#Z
temp[r - j + 1] = data[j + mid]; }Uki)3(
} r|4jR6%<'m
int a = temp[l]; <q hNX$t
int b = temp[r]; E0[!jZ:c
for (i = l, j = r, k = l; k <= r; k++) { kv&%$cA
if (a < b) { N ?Jr8
data[k] = temp[i++]; a(Ka2;M4J
a = temp; -cs 4<
} else { B+S &vV
data[k] = temp[j--]; 5w"f.d'
b = temp[j]; ]\5@N7h
} uMa: GDh7
} 9\i;zpN\
} zy`4]w$Lj+
1rh\X[@
/** cnvxTI<
* @param data *zeY<6
* @param l {dvrj<?
* @param i p 7IJ3YY
*/ loN!&YceW
private void insertSort(int[] data, int start, int len) { (1JZuR<?c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3lH#+@
} 7vUfA"
} #S2LQ5U
} ,OWdp<z
} w,TyV%b[_
!+Z"7e nj
堆排序： Ntr5Q IPd
sj a;NL
package org.rut.util.algorithm.support; J7$1+|"
N[X%tf\L]F
import org.rut.util.algorithm.SortUtil; 5EDHJU>
nR4L4tdS
/** GjZ@fnF
* @author treeroot aGVzg$
* @since 2006-2-2 "wL~E Si
* @version 1.0 $_ub.g|
*/ LinARMPv
public class HeapSort implements SortUtil.Sort{ PbxuD*LQ.
Pd!;z=I
/* (non-Javadoc) F7a &-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b7R#tT
*/ NHA 2 i
public void sort(int[] data) { Gir_.yc/
MaxHeap h=new MaxHeap(); f/Km$#xOr
h.init(data); jENarB^As
for(int i=0;i h.remove(); cd{3JGgB
System.arraycopy(h.queue,1,data,0,data.length); 8yz A W&q
} h95C4jBE
o_/C9[:
private static class MaxHeap{ SF+ ^dPwj
ka{9{/dz3
void init(int[] data){ "L@qjSs8
this.queue=new int[data.length+1]; 3~6F`G
for(int i=0;i queue[++size]=data; ;=: R|
fixUp(size); @3wI(l[
} hRb k-b
} x={t}qDS8
Q_QmyD~m
private int size=0; Y<3s_
EA7]o.Nm*{
private int[] queue; wOE_2k
6nt$o)[
public int get() { 6yk
return queue[1]; St,IWOmq"
} RI w6i?/I
$t.N|b`'
public void remove() { =bs4*[zq
SortUtil.swap(queue,1,size--); F3jrJ+nJ
fixDown(1); XOa<R
} &=fBqod
file://fixdown /eDah3%d
private void fixDown(int k) { 2#_9x7g+
int j; PN/2EmwtC
while ((j = k << 1) <= size) { F`8A!|cIy
if (j < size %26amp;%26amp; queue[j] j++; Uo(\1&?
if (queue[k]>queue[j]) file://不用交换 "Nd$sZk=
break; R4!qm0Cd
SortUtil.swap(queue,j,k); ;Fcdjy
k = j; Dn$zwksSs
} 1pXAPTV
} OQ#gQ6;?0
private void fixUp(int k) { ~]Mq'
while (k > 1) { .Y'kDuUu
int j = k >> 1; mhJ>5z
if (queue[j]>queue[k]) pW8pp?
break; 9UOx~Ty
SortUtil.swap(queue,j,k); 1jo.d
k = j; %_M B-
} ~U*2h =]
} ']$ttfJB
<9-tA\`8N
} 3Zsqx=w
m#, F%s
} RUf,)]Vvk
/7@@CG6b
SortUtil： }^G'oR1LF
C JiMg'K
package org.rut.util.algorithm; @SPmb o
",E6)r
import org.rut.util.algorithm.support.BubbleSort; #:T5_9p
import org.rut.util.algorithm.support.HeapSort; BdUhFN*
import org.rut.util.algorithm.support.ImprovedMergeSort; <y*#[:i
import org.rut.util.algorithm.support.ImprovedQuickSort; 51`w.ri
import org.rut.util.algorithm.support.InsertSort; HT A-L>Cee
import org.rut.util.algorithm.support.MergeSort; $f>WR_F
import org.rut.util.algorithm.support.QuickSort; )U<4ul
import org.rut.util.algorithm.support.SelectionSort; yN{Ybp
import org.rut.util.algorithm.support.ShellSort; y$*?k0=ZX
PNT.9 *d
/** w|Zq5|[
* @author treeroot S7aSUt!
* @since 2006-2-2 $f1L<euH
* @version 1.0 DetBZ.
*/ a&L8W4
public class SortUtil { Y+upZ@Ga
public final static int INSERT = 1; )%X\5]w`
public final static int BUBBLE = 2; tl;?/
public final static int SELECTION = 3; rZGbU&ZM8
public final static int SHELL = 4; cWFvYF
public final static int QUICK = 5; (4ow0}1
public final static int IMPROVED_QUICK = 6; %Tsefs?_
public final static int MERGE = 7; FD|R4 V*3
public final static int IMPROVED_MERGE = 8; GD[~4G
public final static int HEAP = 9; :KX/`
H=X>o.iVqi
public static void sort(int[] data) { zF)_t S
sort(data, IMPROVED_QUICK); m>:%[vm
} ddnWr"_
private static String[] name={ Uj k``;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5F^,7A4I0
}; NWCnt,FlY
l[ @\!;|
private static Sort[] impl=new Sort[]{ iCAd7=o
new InsertSort(), XF^c(*5
new BubbleSort(), ys+?+dY2
new SelectionSort(), #l;Ekjfz
new ShellSort(), I_pA)P*Q(6
new QuickSort(), z@~1e]%
new ImprovedQuickSort(), <]wN/B-8J
new MergeSort(), }'H Da M
new ImprovedMergeSort(), M*c\=(
new HeapSort() m 7 Fz&bN
}; )QBsyN<x6
*tRJ=
public static String toString(int algorithm){ "45BOw&72G
return name[algorithm-1]; Tj:+:B(HB
} ^~BJu#uVyy
3M1(an\nW
public static void sort(int[] data, int algorithm) { e1<28g
impl[algorithm-1].sort(data); "a,Tc2xk
} @Zq,mPaR$
_LK>3Sqd
public static interface Sort { 'c &Bmd40
public void sort(int[] data); +bRL.xY
} =PZs'K
7/*;rT
public static void swap(int[] data, int i, int j) { oAvJ"JH@i
int temp = data; oR-_=U^
data = data[j]; t9K.Jc0
data[j] = temp; |0qk
} 0-|1}/{4
} H>DJ-lG(