[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; 'CV^M(o'9
} vgG}d8MW37
int i1=l; ;)/@Xx
int i2=mid+1; wyQb5n2`;~
for(int cur=l;cur<=r;cur++){ V'wi^gq
if(i1==mid+1) K&`Awv
data[cur]=temp[i2++]; wK5_t[[
else if(i2>r) }[=YU%[o:
data[cur]=temp[i1++]; ej[Su
else if(temp[i1] data[cur]=temp[i1++]; ?S`>>^
else iD_TP
data[cur]=temp[i2++]; S`g;Y '
} F?]N8W
} g:~+Pe
2<6j1D^jM
} Z7#7N wy4
Os&1..$Nb
改进后的归并排序: o}D![/
9YKDguG
package org.rut.util.algorithm.support; %J P!{mqj
Da,Tav%b
import org.rut.util.algorithm.SortUtil; "kSwa16O
X#J6Umutm
/** \lr/;-zP
* @author treeroot (cV
* @since 2006-2-2 rw u3Nb
* @version 1.0 *o4%ul\3Y|
*/ J_"3UZ~&
public class ImprovedMergeSort implements SortUtil.Sort { {BOLPE-
3wt
private static final int THRESHOLD = 10; (2txM"Dja
PZOORjF8A
/* Ye|G44z
* (non-Javadoc) I'_v{k5ZI
* O%$O(l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :JV\){P
*/ .h8M
public void sort(int[] data) { CT"Fk'B'
int[] temp=new int[data.length]; k|j:T[_
mergeSort(data,temp,0,data.length-1); OgMI
} +VOb
UKs$W`
private void mergeSort(int[] data, int[] temp, int l, int r) { g [L
int i, j, k; htHv&
int mid = (l + r) / 2; n`<S&KP|
if (l == r) eV;me>,
return; G11cNr>*
if ((mid - l) >= THRESHOLD) 3M*Y= ?pI
mergeSort(data, temp, l, mid); V5s&hZZYa
else fM":f| G
insertSort(data, l, mid - l + 1); <Jwo?[a
if ((r - mid) > THRESHOLD) L8P36]>
mergeSort(data, temp, mid + 1, r); #v/ry)2Y=
else l>Av5g)
insertSort(data, mid + 1, r - mid); >d%VDjk .
Gpu_=9vzv
for (i = l; i <= mid; i++) { _Ex?Xk
temp = data; ] 09yy
} #"r kuDO
for (j = 1; j <= r - mid; j++) { yQ-hnlzn~
temp[r - j + 1] = data[j + mid]; =]KIkS3
} dXZP[K#
int a = temp[l]; <!!nI%NC
int b = temp[r]; ND,`QjmZ
for (i = l, j = r, k = l; k <= r; k++) { ;,`]O!G:P
if (a < b) { G"Pj6QUva
data[k] = temp[i++]; :uvc\|:s
a = temp; J|?[.h7tO
} else { a7 )@BzF#
data[k] = temp[j--]; R0IF'
b = temp[j]; Zd XKI{b
} `,-STIh)
} x!+Z{x
} }200g_^
#M:B3C!ouY
/** 1^sbT[%R
* @param data /j %_t
* @param l d+1x*`U|
* @param i [x$;XqA
*/ f?m5pax|
private void insertSort(int[] data, int start, int len) { %*p^$5L<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hn^sW LT
} ]ut?&&*
} s((b"{fFb
} ">,K1:(D
} !7Uu]m69n
kaC+I"4c
堆排序： B[7A
FvA|1c
package org.rut.util.algorithm.support; `D"1 gD}{A
QX+Y(P`vMK
import org.rut.util.algorithm.SortUtil; 'A1E^rl]=
*vD/(&pQ1:
/** E6Q91Wz9f
* @author treeroot QRiF!D)Nk
* @since 2006-2-2 i6A$1(:h
* @version 1.0 oVreP
*/ e sGlMq
public class HeapSort implements SortUtil.Sort{ o{g@Nk'f
b<\GI7
/* (non-Javadoc) M;PlSb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~QO< B2hS}
*/ .Nk6
public void sort(int[] data) { 'Ye]eL,I\
MaxHeap h=new MaxHeap(); F]0Jwm{
h.init(data); WS5"!vz
for(int i=0;i h.remove(); -BjEL;
System.arraycopy(h.queue,1,data,0,data.length); /rOnm=P+Q
} Y`q!V=
w&9F>`VET
private static class MaxHeap{ d(\1 }l
"d:.*2Z2
void init(int[] data){ 7s!AHyZ
this.queue=new int[data.length+1]; ec#_olG%
for(int i=0;i queue[++size]=data; c%b\CP\)W
fixUp(size); du8!3I
} Cl{{H]QngX
} Bd QQ9$@5
\Qp}|n1JY
private int size=0; 4t*<+H%
sq48#5Tc^r
private int[] queue; iPz1eUj
R'r|E_
public int get() { R rxRa[{Z
return queue[1]; ^|r`"gOJ3
} zQ=aey%
Px$'(eMj^3
public void remove() { *:(1K%g
SortUtil.swap(queue,1,size--); HoMQt3C
fixDown(1); Qk|( EFQ9
} d{?)q
file://fixdown qPp]K?.
private void fixDown(int k) { 2,+@#q
int j; rdFs?hO
while ((j = k << 1) <= size) { pDP33`OFh
if (j < size %26amp;%26amp; queue[j] j++; <%he o
if (queue[k]>queue[j]) file://不用交换 rT o%=0P
break; 1XQ87~
SortUtil.swap(queue,j,k); YBR)s\*
k = j; gca|?tt
} s!bHS_\e|
} RLv&,$$0
private void fixUp(int k) { rnJS[o0
while (k > 1) { 7%W!k zp>
int j = k >> 1; zkH<aLRB
if (queue[j]>queue[k]) EWSr@}2j .
break; ws#hhW3qK
SortUtil.swap(queue,j,k); Qa>%[jx,@,
k = j; ;.L!%$0i#
} T..-)kL+p
} 69N1 mP
)0'Y et}
} >h|UCJ1 `
fQ^h{n
} "MW55OWYU
1LV|t+Sex
SortUtil： "tpvENz2s
* .oi3m
package org.rut.util.algorithm; \%Pma8&d
R%Kl&c
import org.rut.util.algorithm.support.BubbleSort; t!NrB X
import org.rut.util.algorithm.support.HeapSort; (q055y
import org.rut.util.algorithm.support.ImprovedMergeSort; k&n\ =tKN
import org.rut.util.algorithm.support.ImprovedQuickSort; 4U_rB9K$
import org.rut.util.algorithm.support.InsertSort; o-~-F+mj#
import org.rut.util.algorithm.support.MergeSort; gGF$M `
import org.rut.util.algorithm.support.QuickSort; jc3ExOH
import org.rut.util.algorithm.support.SelectionSort; |L*6x S[
import org.rut.util.algorithm.support.ShellSort; 9 Wxq)
ytg7p5{!i
/** .0rJIO
* @author treeroot ^XtHF|%0T
* @since 2006-2-2 $XU-[OF%:9
* @version 1.0 ^!N;F"
*/ Vx0MG{vG1
public class SortUtil { 7MR:X#2v>
public final static int INSERT = 1; :k Rv
public final static int BUBBLE = 2; pIk4V/fy
public final static int SELECTION = 3; ,q{lYX83S
public final static int SHELL = 4; 0%vixR52
public final static int QUICK = 5; QSO5 z2|
public final static int IMPROVED_QUICK = 6; 1t!&xvhG
public final static int MERGE = 7; CR} >
public final static int IMPROVED_MERGE = 8; u0<d2Y
public final static int HEAP = 9; 3 ATN?V@
#u!y`lek
public static void sort(int[] data) { @Z"QA!OK~c
sort(data, IMPROVED_QUICK); <h)deB+}
} D7 8)4>X
private static String[] name={ Z?.:5#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jFI]54,
}; Ut0qrkqF
!&W"f#_Z
private static Sort[] impl=new Sort[]{ &QiAM`MbC=
new InsertSort(), / nC$?w
new BubbleSort(), :/I={)5
new SelectionSort(), pP=_@3 D
new ShellSort(), M)bC%(xJ
new QuickSort(), vq@#Be?@
new ImprovedQuickSort(), %t,1_c0w
new MergeSort(), %a%+!wX0x
new ImprovedMergeSort(), I_{9eG1w?
new HeapSort() P2<gHJ9t
}; ?etj.\q6
C{lB/F/|!
public static String toString(int algorithm){ 7!]k#|u
return name[algorithm-1]; aC $h_
} F!DrZd>\
YB(#]H|8S
public static void sort(int[] data, int algorithm) { L>|A6S#y8/
impl[algorithm-1].sort(data); fh/)di
} wFH(.E0@Q
XmE_F
public static interface Sort { 476M` gA
public void sort(int[] data); XF0*d~4
} GcU(:V2o
C 6:pY-
public static void swap(int[] data, int i, int j) { <ZN) /,4PS
int temp = data; J{v6DYhi
data = data[j]; U/~Zk@3j
data[j] = temp; [m@e^6F0U
} _ ;v_L
} [NR0] #h