[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; 8Fv4\dr
} gdS@NUM
int i1=l; ($t;Xab
int i2=mid+1; XRi37|p
for(int cur=l;cur<=r;cur++){ eg"A?S
if(i1==mid+1) [X ]XH
data[cur]=temp[i2++]; Q}#xfrprF
else if(i2>r) y<PQ$D)
data[cur]=temp[i1++]; zA|)9Dq
else if(temp[i1] data[cur]=temp[i1++]; 6 2t9SY
else gSkY c{b
data[cur]=temp[i2++]; wI?AZd;`'
} :VE0eJ]J6
} oo|Nu+
K+`deH_d
} } wx(P3BHD
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改进后的归并排序: fzUG1|$e
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package org.rut.util.algorithm.support; ( ;_AP.
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import org.rut.util.algorithm.SortUtil; UQjYWXvi
pW_mS|
/** *A0*.>@N
* @author treeroot izR#XeBm
* @since 2006-2-2 rLA^ &P:
* @version 1.0 L$ZsNs+
*/ PoD/i@
public class ImprovedMergeSort implements SortUtil.Sort { &;U F,
3|D.r-Q
private static final int THRESHOLD = 10; f{h2>nEj\
v.c.5@%%o
/* *S'?u_Y7
* (non-Javadoc) a0's6C
* 4)Ew rU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qoEZ>
*/ .x1.`Y
public void sort(int[] data) { =.qPjp_Qd
int[] temp=new int[data.length]; G$2Pny<!
mergeSort(data,temp,0,data.length-1); 9/{ 8Y&
} A@e!~
z&z5EtFUTh
private void mergeSort(int[] data, int[] temp, int l, int r) { ,r;E[k@
int i, j, k; p]jG ,S
int mid = (l + r) / 2; K4b2)8
if (l == r) @{ L|&Mk!
return; bjq.nn<=
if ((mid - l) >= THRESHOLD) o)8VJ\ &
mergeSort(data, temp, l, mid); kArF Gb2c
else L;fz7?_j
insertSort(data, l, mid - l + 1); =)J)xH!N
if ((r - mid) > THRESHOLD) (/7cXd@\6
mergeSort(data, temp, mid + 1, r); YD#L@:&gv
else ?O0,)hro
insertSort(data, mid + 1, r - mid); ~J >Jd
_)6r@fZ.p
for (i = l; i <= mid; i++) { r(<91~Ww
temp = data; 3gv?rJV
} r9p ((ir
for (j = 1; j <= r - mid; j++) { ;rl61d}NH#
temp[r - j + 1] = data[j + mid]; ~I]aUN
} O~Svk'.)
int a = temp[l]; fC/P W`4Ae
int b = temp[r]; F(w<YU%6
for (i = l, j = r, k = l; k <= r; k++) { CKX3t:HP0
if (a < b) { d"S\j@
data[k] = temp[i++]; _p<wATv?7t
a = temp; %&wi@ *#
} else { 7wHd*{^9N
data[k] = temp[j--]; h~q5GhY!9
b = temp[j]; qAt#0
} CHDt^(oa!B
} xu>grj
} 8v6AfTo%
RtEx WTc
/** Q1!+wC
* @param data L;=LAQ6[
* @param l 4^!%>V"d/
* @param i |#Q0UM|'Q
*/ EmyE%$*T
private void insertSort(int[] data, int start, int len) { 1w+)ne_&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gFXz:!A
} 31N5dIi,
} [Bj\h7G
} w8F`RRHEE
} 'fZ\uMdTx
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堆排序： ^~s!*T)\
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package org.rut.util.algorithm.support; )U{\c2b
hLT?aQLx
import org.rut.util.algorithm.SortUtil; H%{k.#O
$)6x3&]P
/** 7_J0[C!G
* @author treeroot }/jWa|)f
* @since 2006-2-2 gI/(hp3ob
* @version 1.0 {uxTgX
*/ I(j$^DA.
public class HeapSort implements SortUtil.Sort{ >|mZu)HIY;
8Ep!
/* (non-Javadoc) 3teP6|K'g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xdMY2u
*/ z7pw~Tqlz
public void sort(int[] data) { eKRE1DK
MaxHeap h=new MaxHeap(); k{bC3)'$#R
h.init(data); {gzVbZ#
for(int i=0;i h.remove(); CW FE{
System.arraycopy(h.queue,1,data,0,data.length); ),2|TlQ
} 8_M"lU0[
Q~`{^fo1
private static class MaxHeap{ 'ZAIe7i&
KLjvPT\
void init(int[] data){ |{MXDx
this.queue=new int[data.length+1]; V/RV,K1/
for(int i=0;i queue[++size]=data; ^JGwCHeb|H
fixUp(size); PoLk{{l3
} xRZ/[1f!
} hRqr
H`jnChD:M'
private int size=0; B/Ltb^a
s0DT1s&
private int[] queue; 'f8'|o)
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public int get() { $y%IM`/w
return queue[1]; LtV,djk
} "d2JNFIHb
u,]qrlx{
public void remove() { :Xu9`5
SortUtil.swap(queue,1,size--); gP>W* ]0r1
fixDown(1); lBudC
} z6|kEc"{
file://fixdown z&\N^tBv
private void fixDown(int k) { Y/ %XkDC~
int j; 7tne/Yz
while ((j = k << 1) <= size) { szD9z{9"y
if (j < size %26amp;%26amp; queue[j] j++; Az/B/BLB
if (queue[k]>queue[j]) file://不用交换 g*!1S
break; Bve',.xH
SortUtil.swap(queue,j,k); eV"Uv3
k = j; dV /Es
} .UvDew/Y
} ,:0!+1
private void fixUp(int k) { szXqJG8|
while (k > 1) { IA$=
int j = k >> 1; ^-F#"i|Cn
if (queue[j]>queue[k]) h;R>|2A
break; G[n;%c~`+
SortUtil.swap(queue,j,k); )_}xK={
k = j; f/"IC;<~t>
} FytGg[#]
} 2 ]n4)vv,
WA.c.{w\
} t ;fJ`.
ULO_?4}B
} _>3#dk
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SortUtil： qRq4PQ@
En4!-pWHQ
package org.rut.util.algorithm; O\h%ZLjfO
#"C!-kS'=
import org.rut.util.algorithm.support.BubbleSort; l< HnPR/
import org.rut.util.algorithm.support.HeapSort; !Z0S@]C
import org.rut.util.algorithm.support.ImprovedMergeSort; )S}.QrG
import org.rut.util.algorithm.support.ImprovedQuickSort; bGK-?BE5+A
import org.rut.util.algorithm.support.InsertSort; 6XnUs1O
import org.rut.util.algorithm.support.MergeSort; o\fPZ`p-m~
import org.rut.util.algorithm.support.QuickSort; RFq=`/>dG
import org.rut.util.algorithm.support.SelectionSort; X.ZG-TC
import org.rut.util.algorithm.support.ShellSort; iO$ ?No
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/** C8=rsh
* @author treeroot /l8wb~vl
* @since 2006-2-2 U&SSc@of
* @version 1.0 9t8ccr
*/ A,c_ME+DVB
public class SortUtil { O`Htdnu
public final static int INSERT = 1; SZ:R~4 A
public final static int BUBBLE = 2; N|8^S
public final static int SELECTION = 3; ),$^h7[n
public final static int SHELL = 4; IR32O,)
public final static int QUICK = 5; {MUO25s02
public final static int IMPROVED_QUICK = 6; 4L r,}tA
public final static int MERGE = 7; X^i3(N
public final static int IMPROVED_MERGE = 8; w:](F^<s,
public final static int HEAP = 9; v~0lZe
=w<iYO
public static void sort(int[] data) { ,V''?@
sort(data, IMPROVED_QUICK); >fD%lq;
} Ex6Kxd}8
private static String[] name={ R<^E?FI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9fCU+s
}; bNHsjx@
rddn"~lm1
private static Sort[] impl=new Sort[]{ v!=e]w6{
new InsertSort(), Z1p%6f`
new BubbleSort(), w9Nk8OsL
new SelectionSort(), &SPIu,
new ShellSort(), G]dHYxG
new QuickSort(), e~nh95
new ImprovedQuickSort(), I<"UQ\)
new MergeSort(), iZ0(a
new ImprovedMergeSort(), :Ye~I;"8
new HeapSort() rEWuWv$
}; "$q"Kilj%
`W7;-
public static String toString(int algorithm){ #IeG/t(
return name[algorithm-1]; p*JP='p
} @P[%6 d
mS.!lkV
public static void sort(int[] data, int algorithm) { Ds@K%f(.?w
impl[algorithm-1].sort(data); B5_QH8kt7
} `.wgRUhFH;
w1 A-_
public static interface Sort { slLTZ]
public void sort(int[] data); 0|{":i_s
} 1uzK(j8w
ncpA\E;ff^
public static void swap(int[] data, int i, int j) { T,B%iZgCh
int temp = data; QRF:6bAxsL
data = data[j]; #nKGU"$+
data[j] = temp; k"cKxzB
} G$~hAZ
} Y"dTm;&