[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; F+@E6I'g
} a+CHrnU\;
int i1=l; $*{$90Q
int i2=mid+1; i-EFq@xl
for(int cur=l;cur<=r;cur++){ c=T^)~$$
if(i1==mid+1) o(/(`/
data[cur]=temp[i2++]; 3eg<)
else if(i2>r) $I7/FZP
data[cur]=temp[i1++]; 3T3p[q4
else if(temp[i1] data[cur]=temp[i1++]; YJ`[$0mam
else ( |1 $zF+
data[cur]=temp[i2++]; 5M{DJ/q
} C||A[JOS
} G'<J8;B* t
.bYDj&]P{
} M_2[Wypw
e,}]K'!t
改进后的归并排序: AVR9G^ce_
Lw]:/x
package org.rut.util.algorithm.support; 61Nj&1Ze
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import org.rut.util.algorithm.SortUtil; OT9\K_
{q1&4U~'>O
/** OKp(A
* @author treeroot pX]*&[X?
* @since 2006-2-2 kQ$Q}3f
* @version 1.0 :ji_dQ8k
*/ 8IH&=3
public class ImprovedMergeSort implements SortUtil.Sort { gkuI!=
+SmcZ^\OZ
private static final int THRESHOLD = 10; byv(:xk|'e
HlB'yOHv!
/* D4m2*%M
* (non-Javadoc) 8Us5Oi
* k})Ag7c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9BGPq)#
*/ Jr18faEZw
public void sort(int[] data) { ~$f+]7
int[] temp=new int[data.length]; (9BjZ&ej
mergeSort(data,temp,0,data.length-1); <,l&),
} | %af}# FQ
0*%j6*XDq9
private void mergeSort(int[] data, int[] temp, int l, int r) { 3R?7&oXvH
int i, j, k; 5( lE$&
int mid = (l + r) / 2; WIo^=?%
if (l == r) 1{%EQhNd
return; 2;4Of~
if ((mid - l) >= THRESHOLD) qeCx.Z
mergeSort(data, temp, l, mid); &G@*/2A
else SMQuJ_
insertSort(data, l, mid - l + 1); 56*}}B$?
if ((r - mid) > THRESHOLD) >Ge&v'~_|
mergeSort(data, temp, mid + 1, r); aT F}
else QzIK580%t
insertSort(data, mid + 1, r - mid); &{* [7Ad
}Xs=x6Mj
for (i = l; i <= mid; i++) { j?6%=KuX<
temp = data; v'.?:S&m
} $.(>Sj1
for (j = 1; j <= r - mid; j++) { O@3EJkv
temp[r - j + 1] = data[j + mid]; 9c806>]U^
} @3[Z QF
int a = temp[l]; pCA(>(
int b = temp[r]; V5K!u8T
for (i = l, j = r, k = l; k <= r; k++) { :XF;v
if (a < b) { Wn24eld"x
data[k] = temp[i++]; !wvP24"y
a = temp; 'r4 j;Jn
} else { K2L+tw
data[k] = temp[j--]; !1dCk/D&)8
b = temp[j]; zb~!> QIz{
} d> Y9g
} qSMSTmnQ
} G3 #c
i}RxTmG<
/** #:z.Br`
* @param data DI9x]CR
* @param l HPpKti7g
* @param i Aa.bE,W
*/ @6ZQkX/
private void insertSort(int[] data, int start, int len) { }Fyf?TZ$T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hkv&Od,
} ,a< !d
} 8:-[wl/@
} J}KATpHs
} @y9_\mX!s
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堆排序： /l0\SVwa>
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package org.rut.util.algorithm.support; >t?;*K\x"
A[;R_
import org.rut.util.algorithm.SortUtil; (C,PGjd
V?HC\F-
/** O} QTg
* @author treeroot +=Crfvt
* @since 2006-2-2 z)q9O_g9
* @version 1.0 r_I7Gd
*/ GKtG#jZ&
public class HeapSort implements SortUtil.Sort{ $~50M5&K#
Oh~JyrZy
/* (non-Javadoc) J^ryUOo}b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6\g]Y
*/ P$Xig
public void sort(int[] data) { >I8R[@
MaxHeap h=new MaxHeap(); c&AA< 6pkv
h.init(data); O|#^&d
for(int i=0;i h.remove(); )fpZrpLXE
System.arraycopy(h.queue,1,data,0,data.length); D^I%tn=F
} Cz Jze
me$7\B;wy
private static class MaxHeap{ :^1 Xfc"
jUZ84Gm{
void init(int[] data){ P$N\o@
this.queue=new int[data.length+1]; RXb+"/
for(int i=0;i queue[++size]=data; %IW=[D6Tg
fixUp(size); &voyEvX/S
} wvcG <sj
} ; @-7'%(C
2ME3=C
private int size=0; PE|_V
4rc4}Yu,JI
private int[] queue; V3xC"maA@
gx#xB8n
public int get() { `3SY~&X
return queue[1]; W7S`+Pq
} 7P?z{x':T
; GRSe
public void remove() { #)tt}GX
SortUtil.swap(queue,1,size--); 7*M+bZ`x
fixDown(1); ckBcwIXlP&
} 8U*}D~%!
file://fixdown !TVlsm
private void fixDown(int k) { G 2+A`\]
int j; zdzTJiY2[Z
while ((j = k << 1) <= size) { 4H]Go~<
if (j < size %26amp;%26amp; queue[j] j++; Im+<oZ
if (queue[k]>queue[j]) file://不用交换 TPt<(-}W
break; /^G1wz2
SortUtil.swap(queue,j,k); 6OF&Q`*4
k = j; AwAUm 2^
} `!kOyh:X
} CQW#o_\
private void fixUp(int k) { {l%Of
while (k > 1) { ,H2[["1DH
int j = k >> 1; c-z ,}`
if (queue[j]>queue[k]) 81O`#DfZ
break; 5yI_uQR
SortUtil.swap(queue,j,k); 4)!aYvaER
k = j; :,Q\!s!
} ly7\H3
} "H" 4(3
;x$,x-
} Jv %,v?
ZO5_n
} .EM0R\q
0WaC.C+2i
SortUtil： B?`Gs^Y{z
O[U^{~iM
package org.rut.util.algorithm; |`1lCyV\tE
D kl4^}
import org.rut.util.algorithm.support.BubbleSort; 9i*t3W71]
import org.rut.util.algorithm.support.HeapSort; a"EX<6"
import org.rut.util.algorithm.support.ImprovedMergeSort; |77.Lqqy,
import org.rut.util.algorithm.support.ImprovedQuickSort; fr#Y<=Jo
import org.rut.util.algorithm.support.InsertSort; "G].hKgbk*
import org.rut.util.algorithm.support.MergeSort; )pJ} $[6
import org.rut.util.algorithm.support.QuickSort; y>_lxLhmO#
import org.rut.util.algorithm.support.SelectionSort; szu!*wc9
import org.rut.util.algorithm.support.ShellSort; f',n'
T@GT=1E)
/** {Xb 6wQ"
* @author treeroot p#wQW[6
* @since 2006-2-2 s {p-cV
* @version 1.0 W,9. z%
*/ $l@nk@
public class SortUtil { e;GLPB
public final static int INSERT = 1; 26.),a
public final static int BUBBLE = 2; RSC^R}a5
public final static int SELECTION = 3; NGcd
public final static int SHELL = 4; SU~t7Ta!G
public final static int QUICK = 5; P$ZIKkf
public final static int IMPROVED_QUICK = 6; l=ehoyER
public final static int MERGE = 7; ~[l6;bn
public final static int IMPROVED_MERGE = 8; fb3(9
public final static int HEAP = 9; 4{=zO(>
l\xcR]O
public static void sort(int[] data) { hOw
sort(data, IMPROVED_QUICK); ;gLHSHEA
} ecDni>W
private static String[] name={ B+[ri&6X\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |T\`wcP`q
}; r"sK@
C62:G+W&o
private static Sort[] impl=new Sort[]{ &TJMopVn
new InsertSort(), X|zQZ<CO
new BubbleSort(), Hof@,w
new SelectionSort(), meey5}
new ShellSort(), )c!7V)z
new QuickSort(), "HX,RJ @^K
new ImprovedQuickSort(), XHs>Q>`
new MergeSort(), xucrp::g
new ImprovedMergeSort(), wCw-EGLR
new HeapSort() :FB-GNd
}; w.Cw)#N
qWX%[i%
public static String toString(int algorithm){ 7iMBDkb7
return name[algorithm-1]; Hvqvggfi
} A#;6~f
kZ7\zbN>
public static void sort(int[] data, int algorithm) { $;7,T~{
impl[algorithm-1].sort(data); w=Ai?u
} 4efIw<1_
$/*19e~
public static interface Sort { HYU-F_|N=
public void sort(int[] data); KmS$CFsGL
} (mbC! !>
UdO(9Jc5^
public static void swap(int[] data, int i, int j) { 9<0TF+}>
int temp = data; 0<tce
data = data[j]; cjK\(b3
data[j] = temp; [PG#5.jwQ
} zwJB.4@
} (=&z:-52V