[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; wLIMv3;k
} -OV&Md:~
int i1=l; gb1V~
int i2=mid+1; L;z?aZ7n
for(int cur=l;cur<=r;cur++){ rSY!vkLE\
if(i1==mid+1) 2DA]i5
data[cur]=temp[i2++]; RHW]Z Pr<
else if(i2>r) Da*?x8sSL
data[cur]=temp[i1++]; J0WxR&%a)
else if(temp[i1] data[cur]=temp[i1++]; \ #F
else +Ze}B*0
data[cur]=temp[i2++]; f_OQ./`
} \doUTr R
} G[PtkPSJ
lf|FWqqV
} s S+MqBh&I
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改进后的归并排序: }rUN_.n4z
q1x`Bj
package org.rut.util.algorithm.support; `7E;VL^Y1
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import org.rut.util.algorithm.SortUtil; %@b0[ZC
h,:m~0gmj
/** ]h`&&Bqt
* @author treeroot .vf'YNQ%
* @since 2006-2-2 >58YjLXb
* @version 1.0 [>I<#_^~
*/ +fB5w?Rg
public class ImprovedMergeSort implements SortUtil.Sort { LH.]DVj
K8|r&`X0
private static final int THRESHOLD = 10; ;?Tbnn Wn
XSB"{H>&
/* 6_o*y8s.
* (non-Javadoc) $S6`}3
* s[>,X#7 y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7~h<$8Y(T
*/ C^Yb\N}S
public void sort(int[] data) { -m zIT4
int[] temp=new int[data.length]; u{cW:
mergeSort(data,temp,0,data.length-1); 5{WE~8$
} UW={[h{.|@
e*kpdS~U&
private void mergeSort(int[] data, int[] temp, int l, int r) { e(&v"}Ef`
int i, j, k; Pbn*_/H
int mid = (l + r) / 2; x;.Jw6g
if (l == r) 1t~G|zhX
return; n+9=1Oo"
if ((mid - l) >= THRESHOLD) *8A
mergeSort(data, temp, l, mid); C3f' {}
else ! I:%0D
insertSort(data, l, mid - l + 1); )AtD}HEv
if ((r - mid) > THRESHOLD) !?jrf] A@
mergeSort(data, temp, mid + 1, r); M] %?>G
else _yx>TE2e
insertSort(data, mid + 1, r - mid); VT)oLj/A
\.{$11P#
for (i = l; i <= mid; i++) { _Ay9p[l
temp = data; R%WCH?B<}
} r|8d 4
for (j = 1; j <= r - mid; j++) { cl3K<'D
temp[r - j + 1] = data[j + mid]; a.\:T,cP>
} 3ZPWze6
int a = temp[l]; jRlYU`?
int b = temp[r]; 7aRi5
for (i = l, j = r, k = l; k <= r; k++) { !*&V-4
if (a < b) { ?p{Nwl#
data[k] = temp[i++]; y14;%aQN
a = temp; Y]_ruDIW
} else { 1-uxC^u?|#
data[k] = temp[j--]; m9WDT
b = temp[j]; &ywPuTt
} 2zA4vZkbcw
} s c,Hq\$&
} 4Z=_,#h4.
(,\+tr8r8
/** `?rSlR@+[I
* @param data U}[d_f
* @param l NNR`!Pty
* @param i |s(FLF-
*/ W\,s:6iqz
private void insertSort(int[] data, int start, int len) { nHAS(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {]!mrAjD
} i#/Jr=
} {lDd.Fn
} 2]jn '4
} Sv#XIMw{,
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堆排序： ]cWUZ{puRB
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package org.rut.util.algorithm.support; {6|G@""O
%XDc,AR[
import org.rut.util.algorithm.SortUtil; HZB>{O
xrz,\eTb
/** Sq V},
* @author treeroot TER=*"!
* @since 2006-2-2 /9*B)m"
* @version 1.0 $9#H04.x
*/ n ATuD
public class HeapSort implements SortUtil.Sort{ J1|\Q:-7p
l/GGCnO/
/* (non-Javadoc) kx{{_w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <z&/L/bl"
*/ @V sG'
public void sort(int[] data) { xC:L)7#aw
MaxHeap h=new MaxHeap(); qJs<#MQ2
h.init(data); L|+~"'l
for(int i=0;i h.remove(); 286;=rN]*
System.arraycopy(h.queue,1,data,0,data.length); L#?Ek-
} h8S.x)
4r#= *
private static class MaxHeap{ hbDXo:
8I?Wt W
void init(int[] data){ bdrg(d6
this.queue=new int[data.length+1]; ]NY~2jmX
for(int i=0;i queue[++size]=data; .t-4o<7 3
fixUp(size); VBGuC c/
} 9';JXf$
} G@\1E+Ip
$y&E(J
private int size=0; BwGfTua
k68T`Ub\W6
private int[] queue; 'Cfl*iNb
Wx}8T[A}
public int get() { %#:{UR)E
return queue[1]; yCR?UH;
} WIT>!|w_
\)N9aV
public void remove() { ,j{,h_Op
SortUtil.swap(queue,1,size--); ) 1f~ dR88
fixDown(1); o Q2Fjj
} Pb4X\9^
file://fixdown 8 &LQzwa
private void fixDown(int k) { =pO^7g
int j; $E~`\o%Ev
while ((j = k << 1) <= size) { A*2jENgci
if (j < size %26amp;%26amp; queue[j] j++; 7M!I8C0!aO
if (queue[k]>queue[j]) file://不用交换 cWaSn7p!X
break; I\{ 1u
SortUtil.swap(queue,j,k); Y@vTaE^w3
k = j; QzVnL U)
} W=><)miQ@
} @7]yl&LZ
private void fixUp(int k) { oy=js -
while (k > 1) { w^|*m/h|@u
int j = k >> 1; ? 7n`A >T
if (queue[j]>queue[k]) =_2jK0+}l
break; ,t?B+$E
SortUtil.swap(queue,j,k); k8[n+^
k = j; mbxZL<ua
} 4N_R:B-Vu
} [)M%cyQ
+H-6eP
} 9G#n 0&wRJ
DDP/DD;n}r
} xd?f2=dd~h
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SortUtil： +>{2*\cZ5}
1>_8d"<Gd
package org.rut.util.algorithm; 2d #1=+V
KNvZm;Q6
import org.rut.util.algorithm.support.BubbleSort; gnOt+W8
import org.rut.util.algorithm.support.HeapSort; ^A$Zw+P
import org.rut.util.algorithm.support.ImprovedMergeSort; 5|j<`()H :
import org.rut.util.algorithm.support.ImprovedQuickSort; >}8j+t&T
import org.rut.util.algorithm.support.InsertSort; Lv;^My
import org.rut.util.algorithm.support.MergeSort; %KhI>O<
import org.rut.util.algorithm.support.QuickSort; 36Zf^cFJ
import org.rut.util.algorithm.support.SelectionSort; 9@(PWz=`?
import org.rut.util.algorithm.support.ShellSort; /sx&=[ D
JN-y)L/>
/** (AaoCa[
* @author treeroot x.!V^HQSN
* @since 2006-2-2 ZF9z~9
* @version 1.0 ]?kZni8j_
*/ 2\MT;;ZTZ
public class SortUtil { 4K#>f4(U`g
public final static int INSERT = 1; xQ-<WF1i
public final static int BUBBLE = 2; $aDVG})
public final static int SELECTION = 3; Q:G4Z9Kt
public final static int SHELL = 4; '4+ ur`
public final static int QUICK = 5; {9&;Q|D z
public final static int IMPROVED_QUICK = 6; !Y0Vid
public final static int MERGE = 7; DrUO-
public final static int IMPROVED_MERGE = 8; 30#s aGV
public final static int HEAP = 9; /tx]5`#@7]
TOB-aAO
public static void sort(int[] data) { y|i,|
sort(data, IMPROVED_QUICK); ?r "{}%
} |^"1{7)
private static String[] name={ )Xz,j9GzJS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rxvx
}; s 8jV(P(O
7hD>As7`/
private static Sort[] impl=new Sort[]{ _ @NL;w:!
new InsertSort(), kzQ+j8.,U
new BubbleSort(), GX!G>
new SelectionSort(), pHXm>gTd,J
new ShellSort(), jUYWrYJ
new QuickSort(), 45@ I*`
new ImprovedQuickSort(), n?!">G
new MergeSort(), &WuN&As!Z
new ImprovedMergeSort(), C\Wmq [
new HeapSort() +ZaSM~
}; #C74z$
T= y}y
public static String toString(int algorithm){ ["k,QX
return name[algorithm-1]; i/;\7n
} Q0`wt.}V2
/ |;RV"
public static void sort(int[] data, int algorithm) { _lJ!R:*
impl[algorithm-1].sort(data); mW(W\'~_~
} zx"s*:O
FF`T\&u
public static interface Sort { by1<[$8r
public void sort(int[] data); Olt?~}
} #?U}&Bd
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public static void swap(int[] data, int i, int j) { [[Ls_ZL!=
int temp = data; +aCv&sg
data = data[j]; w>s,"2&5J
data[j] = temp; .GPT!lDc
} YNyk1cE
} j|DsG,