[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; ^>gRK*,
} s3HwBA
int i1=l; ^3B{|cqf
int i2=mid+1; &PI}o
for(int cur=l;cur<=r;cur++){ &?IOrHSv!
if(i1==mid+1) .+t{o[
data[cur]=temp[i2++]; ^W5rL@h_
else if(i2>r) bo '
data[cur]=temp[i1++]; ~O;!y%
else if(temp[i1] data[cur]=temp[i1++]; b#(SDNo6
else [yM{A<\L
data[cur]=temp[i2++]; c[}h( jkP
} C'4u+raq
} B$1nq#@
1k6f|Al-
} Wp/!;
*[*LtyCQt4
改进后的归并排序: R/R[r> 1)6
\[Op:^S
package org.rut.util.algorithm.support; i;;CU9`E2q
gV1&b (h
import org.rut.util.algorithm.SortUtil; JryDbGc8
k!H;(B"s-
/** /6B!&b2f
* @author treeroot @a#qq`b;
* @since 2006-2-2 VQ5T$,&
* @version 1.0 v|t_kNX;v*
*/ ge)g?IP4
public class ImprovedMergeSort implements SortUtil.Sort { -l8n0P1+
^)<>5.%1''
private static final int THRESHOLD = 10; s Z(LT'}
Ap9CQ h=!
/* B;XFPQ#b
* (non-Javadoc) x.qn$?3V]
* ?`V%[~4_I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '31pb9@fH
*/ jv>l6)
public void sort(int[] data) { E@^`B9;Q7
int[] temp=new int[data.length]; yx"xbCc#
mergeSort(data,temp,0,data.length-1); )28Jz6.I
} q4@n pbx
5<w"iqZ\?N
private void mergeSort(int[] data, int[] temp, int l, int r) { uNZJNrV%
int i, j, k; wvvMesX<L
int mid = (l + r) / 2; ]IMBRZQqb
if (l == r) fqZqPcT0
return; hAi50q;z
if ((mid - l) >= THRESHOLD) 3GUO
mergeSort(data, temp, l, mid); h.>6>5$n
else /1:`?% ,2
insertSort(data, l, mid - l + 1); hPF9y@lh
if ((r - mid) > THRESHOLD) ugcWFB5|
mergeSort(data, temp, mid + 1, r); A1e|Y
else XKN`{h-@
insertSort(data, mid + 1, r - mid); 6pDb5@QjTy
ZGK*]o=)
for (i = l; i <= mid; i++) { L3lf28W
temp = data; jCqs^`-
} _;3xG0+
for (j = 1; j <= r - mid; j++) { 6DqV1'
temp[r - j + 1] = data[j + mid]; &MsnQP
} V^B'T]s
int a = temp[l]; U4qp?g+:
int b = temp[r]; Z2~;u[0a[
for (i = l, j = r, k = l; k <= r; k++) { ,pE{N&p9
if (a < b) { Ar7vEa81
data[k] = temp[i++]; L^3~gZ
a = temp; ,u7:l
} else { !q=ej^(S
data[k] = temp[j--]; |0:<Z(
b = temp[j]; jjL(=n<J<"
} /*!K4)$-*2
} w^e<p~i!^E
} 9Slx.9f
Bm2"} =
/** A+w51Q
* @param data !:t}8
* @param l />c F
* @param i 8X!^ 2B}J
*/ 'hfQ4EN
private void insertSort(int[] data, int start, int len) { Q4\EI=4P]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QyQ&xgS
} <iVn!P
} fiqeXE?E
} S{gB~W
} ax0RtqtR&
5xX*68]%
堆排序： ^_ L'I%%[
^M6xRkI
package org.rut.util.algorithm.support; NBZFIFO<
-:b0fKn
import org.rut.util.algorithm.SortUtil; 3Xyu`zS&
wR +C>
/** {\9vW; '
* @author treeroot TbbtD"b?
* @since 2006-2-2 Cfqgu;m
* @version 1.0 XcB!9AIO
*/ PB00\&6H
public class HeapSort implements SortUtil.Sort{ 'bVDmm).
`K37&b;`[
/* (non-Javadoc) f(!:_!m*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5D9I;L{
*/ .<566g}VP
public void sort(int[] data) { xU+c?OLi
MaxHeap h=new MaxHeap(); DjUif "v
h.init(data); kbS+3#+
for(int i=0;i h.remove(); |LA@guN
System.arraycopy(h.queue,1,data,0,data.length); D_er(
} rKg~H=4x2
.si!`?K%[
private static class MaxHeap{ 0J7)UqMf.
,pL%,>R5
void init(int[] data){ >5-z"f
this.queue=new int[data.length+1]; h}r64<Y2{
for(int i=0;i queue[++size]=data; Jk=E"I6
fixUp(size); :E'uV"j%
} N GP}Z4
} 9nF;$HB
W@U<GF1
private int size=0; w:%3]2c
`%_yRJd|;
private int[] queue; e<o{3*%p)
OhMnG@@
public int get() { '&?cW#J?
return queue[1]; wh8h1I
} ZdG?fWWA
t@(S=i7}-
public void remove() { 3>;zk#b2
SortUtil.swap(queue,1,size--); j6<o,0P
fixDown(1); [yj-4v%u`
} gI<e=|J6w
file://fixdown -DD2
private void fixDown(int k) { /NRdBN
int j; L-Qc[L
while ((j = k << 1) <= size) { ?/"Fwjau
if (j < size %26amp;%26amp; queue[j] j++; _Bh-*e2k
if (queue[k]>queue[j]) file://不用交换 +Y;/10p
break; a{*r^m'N
SortUtil.swap(queue,j,k); FVw;`{
k = j; g2Pa-}{
} NvCq5B$C
} S9BwCKH
private void fixUp(int k) { \yDr
while (k > 1) { :f<:>"<
int j = k >> 1; }>~';l
if (queue[j]>queue[k]) $OEhdz&Fi
break; Q'-g+aN
SortUtil.swap(queue,j,k); 17IT:T,'
k = j; oAaUXkQE
} e(nT2E
} #+$pE@u7A
n?uVq6c
} L[v-5u)
nO-1^HUl
} $&IF#uDf
]6JI((
SortUtil： JBzRL"|
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package org.rut.util.algorithm; 5X"y46i,H
O#[+= ^
import org.rut.util.algorithm.support.BubbleSort; G&ZpQ)
import org.rut.util.algorithm.support.HeapSort; ?[<C,w~$`
import org.rut.util.algorithm.support.ImprovedMergeSort; Op''=Ar#sh
import org.rut.util.algorithm.support.ImprovedQuickSort; YT:])[gVV
import org.rut.util.algorithm.support.InsertSort; q6E8^7RtS@
import org.rut.util.algorithm.support.MergeSort; 7bcl^~lY
import org.rut.util.algorithm.support.QuickSort; ,c3gW2E
import org.rut.util.algorithm.support.SelectionSort; ^\|Hz\"*
import org.rut.util.algorithm.support.ShellSort; D9.H<.|36
-<e8\Z`
/** TNgf96) y
* @author treeroot X{2))t%
* @since 2006-2-2 r(qAe{
* @version 1.0 d3%1P)
*/ E1'| ;}/
public class SortUtil { k)l*L1Y4:
public final static int INSERT = 1; cj-_
public final static int BUBBLE = 2; {zGM[A
public final static int SELECTION = 3; 2@!Ou$W
public final static int SHELL = 4; O [Q;[@
public final static int QUICK = 5; o0SQJ1.a$
public final static int IMPROVED_QUICK = 6; ^uZ!e+
public final static int MERGE = 7; "`A@_;At`
public final static int IMPROVED_MERGE = 8; @log=^
public final static int HEAP = 9; _Nze="Pt
H|Vq
public static void sort(int[] data) { KBVW<;C$
sort(data, IMPROVED_QUICK); R^t )~\d
} 2Mqac:L
private static String[] name={ "Yh[-[,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?r< F/$/
}; ~n)gP9Hv
WsHC%+\'
private static Sort[] impl=new Sort[]{ JjO="Cmk/
new InsertSort(), X MkyX&y
new BubbleSort(), sf""]c$
new SelectionSort(), G3 h&nH,>
new ShellSort(), #f*,mY|>
new QuickSort(), y]9PLch]vZ
new ImprovedQuickSort(), J2tD).G
new MergeSort(), JQ9JWu%a
new ImprovedMergeSort(), IvJ;9d
new HeapSort() i,k.#Vx[m
}; Ojea~Y]Sr
|[%CFm}+?
public static String toString(int algorithm){ Glz yFj
return name[algorithm-1]; X9:4oMux7
} +Ndo$|XCy]
;{@jj0h;
public static void sort(int[] data, int algorithm) { xRTr<j0s
impl[algorithm-1].sort(data); %+>t @F,GM
} $x%3^{G
j?eWh#[K"
public static interface Sort { {'(1c)q>
public void sort(int[] data); 0iy-FV;J
} u+U '|6)E
I\8f`l
public static void swap(int[] data, int i, int j) { |dLA D4%
int temp = data; A4kYEA
data = data[j]; ez2rCpA
data[j] = temp; K/^70;/!.
} d5b \kRr
} 4tZnYGvqe