[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; h_*!cuH
} }LYK:?_/
int i1=l; I)s~kA.e
int i2=mid+1; KdN+$fe*g
for(int cur=l;cur<=r;cur++){ ^VL",Nt
if(i1==mid+1) ?xX9o
data[cur]=temp[i2++]; nNj<!}HvV
else if(i2>r) *gGL5<%T:
data[cur]=temp[i1++]; VelR8tjP
else if(temp[i1] data[cur]=temp[i1++]; ais@|s;
else crvq]J5
data[cur]=temp[i2++]; <?h,;]U
} "fH"U1Bw
} VUd=|$'J
9=o;I;I
} ?hfyQhR
QP?eKW9 :
改进后的归并排序: S:F8`Gh
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package org.rut.util.algorithm.support; HEBKRpt
jVdRy{MH
import org.rut.util.algorithm.SortUtil; ?mq<#/qb
d$f3Cre
/** aWg*f*2f
* @author treeroot o W<Z8s;p
* @since 2006-2-2 VV'*3/I
* @version 1.0 vr2cDk{
*/ mu$0x)
public class ImprovedMergeSort implements SortUtil.Sort { =]F;{x
D:Rr|m0Tk
private static final int THRESHOLD = 10; Z)qts=
9jkaEn>m^
/* =sFLzAu8
* (non-Javadoc) (6g;FD:"6
* ,RXfJh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =wcqCW,]
*/ **KkPjAO?
public void sort(int[] data) { L;%_r)
int[] temp=new int[data.length]; 7%` \E9t
mergeSort(data,temp,0,data.length-1); *h9S\Pv>j
} Q |1-j
Z23*`yR
private void mergeSort(int[] data, int[] temp, int l, int r) { VC T~"T2R
int i, j, k; n,l{1 q
int mid = (l + r) / 2; g#}a?kTM@
if (l == r) T*3>LY+bb
return; #Y>os3]
if ((mid - l) >= THRESHOLD) I7C*P~32{n
mergeSort(data, temp, l, mid); RX\l4H5;
else 8n'"RaLQ8
insertSort(data, l, mid - l + 1); d&G#3}kOb%
if ((r - mid) > THRESHOLD) \g;o9}@3~
mergeSort(data, temp, mid + 1, r); 2N/4.
else 5,~Ju>y*
insertSort(data, mid + 1, r - mid); w+_pq6\V
]/cVlpZ{f
for (i = l; i <= mid; i++) { N3U.62
temp = data; n97pxD_74
} Tm) (?y
for (j = 1; j <= r - mid; j++) { kD?lMA__
temp[r - j + 1] = data[j + mid]; a}p}G\b|
} >Y>>lE! k
int a = temp[l]; =[ZuE0c
int b = temp[r]; lO+6|oF0
for (i = l, j = r, k = l; k <= r; k++) { \2U FJ
if (a < b) { _*1{fvv0{
data[k] = temp[i++]; I[g;p8jr
a = temp; K.l7yBm
} else { 552yzn1
data[k] = temp[j--]; }]BH "
b = temp[j]; +r<d z
} I}hY @
} uW{;@ 7N
} mSFh*FG
9L+g;Js$4
/** sgxD5xj}4
* @param data zQ>|`0&8
* @param l ]38{du
* @param i E9]\ I>v
*/ `{v!|.d<
private void insertSort(int[] data, int start, int len) { ,e93I6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;&$Nn'~a
} d!z}! :
} kuI%0)iZn
} y7Sey;
} WJ[ybzVj
}:zTz%_K
堆排序： a?K3/0G
ZOIx+%/Vd#
package org.rut.util.algorithm.support; O86[`,
E|~)"=
import org.rut.util.algorithm.SortUtil; 81jVjf?`
.KeZZLH
/** i"Z
* @author treeroot Smc=-M}
* @since 2006-2-2 c7R<5f
* @version 1.0 ?P>3~3 B
*/ eY'< UO
public class HeapSort implements SortUtil.Sort{ O*dtVX
@SX-=Nr
/* (non-Javadoc) m6 VL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) edZhI
*/ eWw# T^
public void sort(int[] data) { ;GF+0~5>
MaxHeap h=new MaxHeap(); }\Ri:&?
h.init(data); HCIS4}lQ
for(int i=0;i h.remove(); aFf(m-
System.arraycopy(h.queue,1,data,0,data.length); Nfo`Q0\[P
} 8Ts_;uId
T-)lnrs^
private static class MaxHeap{ 1Ax{Y#<
,2MLYW,
void init(int[] data){ aEvW<jHh
this.queue=new int[data.length+1]; ^0T DaZDLp
for(int i=0;i queue[++size]=data; tsf)+`vt
fixUp(size); -qNun3
} ,B8u?{O
} `"RT(` m
LEn+0^hX
private int size=0; 2T&n6t$p
f:u3fL
private int[] queue; gF53[\w^v
6(=>!+xpRr
public int get() { -?}Z0e(w
return queue[1]; &cuDGo.
} 3-6Lbe9H
dHO8 bYBH
public void remove() { .sBwJZ
SortUtil.swap(queue,1,size--); W^8MsdM
fixDown(1); ^=.QQo||B
} 8%Eemk>G{
file://fixdown Ax{C ^u
private void fixDown(int k) { 7%)KB4(\_
int j; BH3%dh:9
while ((j = k << 1) <= size) { (JI[y"2
if (j < size %26amp;%26amp; queue[j] j++; J]4pPDm
if (queue[k]>queue[j]) file://不用交换 <%ba 3<sg
break; _|f_%S8a_=
SortUtil.swap(queue,j,k); {$P')>/
k = j; yO*HJpc
} #sHt3z)6I
} $Si|;j$?
private void fixUp(int k) { ==]BrhZK
while (k > 1) { /]>8V'e\
int j = k >> 1; }_|qDMk+
if (queue[j]>queue[k]) I;GbS`
break; E=$li
SortUtil.swap(queue,j,k); 5h7M3s
k = j; ,We'AR3X
} -.t/c}a#
} ]X\p\n'@j
'MK"*W8QRM
} 3!qp+i)?
`&w{-om\
} U@:h';.
Q4e+vBECkq
SortUtil： 2Y1y;hCK
&qMt07
package org.rut.util.algorithm; Tg_#z
&OXm^f)K
import org.rut.util.algorithm.support.BubbleSort; {({Rb$
import org.rut.util.algorithm.support.HeapSort; +rWcfXOHM
import org.rut.util.algorithm.support.ImprovedMergeSort; OYLg-S
import org.rut.util.algorithm.support.ImprovedQuickSort; $az9Fmta
import org.rut.util.algorithm.support.InsertSort; +"GBuNh
import org.rut.util.algorithm.support.MergeSort; bx._,G
import org.rut.util.algorithm.support.QuickSort; '4e, e|r
import org.rut.util.algorithm.support.SelectionSort; Boj#r ,x
import org.rut.util.algorithm.support.ShellSort; >hv8zHOO:
?)V|L~/
/** M'5PPBSR
* @author treeroot 6.6;oa4j
* @since 2006-2-2 E x)fXQ+
* @version 1.0 GzEvp
*/ @Pb%dS
public class SortUtil { `;HZO8
public final static int INSERT = 1; {'NXJ!I;t
public final static int BUBBLE = 2; $i;m9_16
public final static int SELECTION = 3; TW~%1G_v
public final static int SHELL = 4; *|({(aZ
public final static int QUICK = 5; 3{H&{@Q
public final static int IMPROVED_QUICK = 6; e#!,/pE
public final static int MERGE = 7; 9(pF!}1%\
public final static int IMPROVED_MERGE = 8; }P\J?8
public final static int HEAP = 9; kHz?vVE/l
(MzThGJK_
public static void sort(int[] data) { 7!PU}[:
sort(data, IMPROVED_QUICK); +. tcEbFL
} oZ\zi> Y,
private static String[] name={ ]Wg&r Y0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z*e`2n#\
}; 1TlMB
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private static Sort[] impl=new Sort[]{ =<[M$"S7d6
new InsertSort(), r8,'LZIz
new BubbleSort(), XDyFe'1I
new SelectionSort(), Oh;V%G
new ShellSort(), q_86nvB<
new QuickSort(), oCSJ<+[(C
new ImprovedQuickSort(), ]6;G#
new MergeSort(), /WMJ#IE
new ImprovedMergeSort(), V\*J"ZP&
new HeapSort() PX>>h}%
}; ~9Cw5rwH<;
99*QfC
public static String toString(int algorithm){ >=K~*$&>
return name[algorithm-1]; 3eN(Sw@p
} <RCeY(1
AsO)BeUD
public static void sort(int[] data, int algorithm) { 7bL48W<QD
impl[algorithm-1].sort(data); D:0?u_[W
} +ux170Cd3
gQ$0 |0O
public static interface Sort { 6QePrf
public void sort(int[] data); FV\$M6 _
} oD3Q{e
$E-c%-
public static void swap(int[] data, int i, int j) { [B@R(z=H
int temp = data; L*zfZ&
data = data[j]; 8d[!"lL
data[j] = temp; 4P=)u}{]^#
} d~;U-
} 1EQLsg`d^