[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`$s63
} ~E=.*: 5(
int i1=l; %<q l
int i2=mid+1; ?2;r#)
for(int cur=l;cur<=r;cur++){ X#mppMU
if(i1==mid+1) ]kuMzTH
data[cur]=temp[i2++]; joh=0nk;D
else if(i2>r) ~'e/lX9g-
data[cur]=temp[i1++]; &zr..i4O
else if(temp[i1] data[cur]=temp[i1++]; ]3C&l+m$ot
else fRe$}KX
data[cur]=temp[i2++]; Z4/rqU
} >*v^E9Y
} zR_#c3o
HKk;oG
} (ROurq"
XTD_q
改进后的归并排序: a(Bo.T<2@
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package org.rut.util.algorithm.support; ?3"bu$@8
wY2#xD
import org.rut.util.algorithm.SortUtil; )Aa98Eu?2
`}KK@(Y
/** `7P4O
* @author treeroot mKwhd} V
* @since 2006-2-2 h:3`e`J<h
* @version 1.0 ;K[`o/#4"
*/ k, )7v
public class ImprovedMergeSort implements SortUtil.Sort { ;6I{7[
kEtYuf^
private static final int THRESHOLD = 10; ;SF0}51
'!64_OMj'
/* 1o7 pMp=
* (non-Javadoc) sAIL+O
* #~54t0|Cd>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i8w(G<Y=
*/ hSc$Sa8
public void sort(int[] data) { 9~DoF]TM
int[] temp=new int[data.length]; g83!il\
mergeSort(data,temp,0,data.length-1); M=$y_9#
} nn"!x|c
&%`IPhbT
private void mergeSort(int[] data, int[] temp, int l, int r) { v6 DN:!&
int i, j, k; wh:O"&qk
int mid = (l + r) / 2; |lIkmW{
if (l == r) >De\2gbJ
return; [6Uc?Bi
if ((mid - l) >= THRESHOLD) _cx}e!BK#
mergeSort(data, temp, l, mid); P@:#NU[
else W{l+_a{/9
insertSort(data, l, mid - l + 1); ;8;nY6Ie
if ((r - mid) > THRESHOLD) dWE[*a\g
mergeSort(data, temp, mid + 1, r); Xd>4n7nb$`
else !mrB+<:
insertSort(data, mid + 1, r - mid); 34 W#
iLn)Z0<\o
for (i = l; i <= mid; i++) { zr?%k]A%UO
temp = data; t<9oEjk["
} B3u5EgZr
for (j = 1; j <= r - mid; j++) { _d&zHlc_
temp[r - j + 1] = data[j + mid]; Gd`qZqx#
} b5 YE4h8%
int a = temp[l]; n8Jx;j
int b = temp[r]; '5KgRK"
for (i = l, j = r, k = l; k <= r; k++) { "/6(
if (a < b) { $BG4M?Y
data[k] = temp[i++]; "-kb=fY
a = temp; 5UR$Pn2a2
} else { "[(_C&Ot4
data[k] = temp[j--]; QfB \h[A
b = temp[j]; Lw?4xerLsb
} Rk56H
} C<2vuZD
} &h-d\gMJ
eb2~$ ,$
/** ;14[)t$
* @param data /s(/6~D|
* @param l }8p;w T!
* @param i ~;,]/'O
*/ iCao;Zb
private void insertSort(int[] data, int start, int len) { #Oz<<G<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5[esW
} n[CESo%[
} e//28=OH
} ?UoA'~=
} {QTfD~z^K
V{@<Z8sW#
堆排序： -]R7[5C:
V#^~JJW^
package org.rut.util.algorithm.support; gAC}
ouK&H|'
import org.rut.util.algorithm.SortUtil; .GM&]Hb
{bl&r?[y
/** 97e fWYj
* @author treeroot \f1r/e(G|
* @since 2006-2-2 @$gvV]dA
* @version 1.0 (ta!4h,
*/ K7Kd{9-2
public class HeapSort implements SortUtil.Sort{ ?3kfhR
FJKt5}`8
/* (non-Javadoc) 3_B .W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~d^+yR-
*/ F*o{dLJ)
public void sort(int[] data) { p@/!+$^{
MaxHeap h=new MaxHeap(); a Umcs!@
h.init(data); uO>$,s
for(int i=0;i h.remove(); ,Ww)>O+
System.arraycopy(h.queue,1,data,0,data.length); /_l%Dm?
} !`hjvJryw
bdk"7N
private static class MaxHeap{ 9kuL1tcY
IrjKI.PR
void init(int[] data){ ?ah-x""Y
this.queue=new int[data.length+1]; q-eC=!#}
for(int i=0;i queue[++size]=data; kB_GL>fc
fixUp(size); ^IOf%
} v$s3f|Y
} YTpSR~!Rj
\$T
private int size=0; }H!c9Y
gpVZZ:~
private int[] queue; mS6 #\'Qa
Y[i>
public int get() { {3lsDU4
return queue[1]; t@QaxZIlt;
} RlyF#X#7{
c<wsWs 4V
public void remove() { }|%dN*',
SortUtil.swap(queue,1,size--); Yw"o_
fixDown(1); "n,">
} D'ZR>@w@
file://fixdown S=~[6;G
private void fixDown(int k) { fQ=Yf?b
int j; W~aVwO'(
while ((j = k << 1) <= size) { SGre[+m~m
if (j < size %26amp;%26amp; queue[j] j++; [U]U *x
if (queue[k]>queue[j]) file://不用交换 Dz:A.x@$*
break; fchsn*R%-
SortUtil.swap(queue,j,k); U2
k = j; F?\XhoJ3G
} R22YKXU
} @AaM]?=P{
private void fixUp(int k) { tq H7M0Ry
while (k > 1) { F$ShhZgi
int j = k >> 1; %/"I.\%d
if (queue[j]>queue[k]) M' e<\wqm
break; >N62t9Ll[
SortUtil.swap(queue,j,k); KPSFy<
k = j; ('xIFi
} Z,)4(#b =
} {mrTpw
G|Rsj{2'
} u)Y~+ [Q
x2=Bu#Y
} Q[kbEhv;
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SortUtil： F&%@p&
t'|A0r$
package org.rut.util.algorithm; Bha#=>4FU
d00#;R
import org.rut.util.algorithm.support.BubbleSort; rn $a)^!
import org.rut.util.algorithm.support.HeapSort; ;{EIx*<d
import org.rut.util.algorithm.support.ImprovedMergeSort; 3_|<CE6
import org.rut.util.algorithm.support.ImprovedQuickSort; 6=U81
import org.rut.util.algorithm.support.InsertSort; "3.v(GVr
import org.rut.util.algorithm.support.MergeSort; Atc9[<~WG
import org.rut.util.algorithm.support.QuickSort; 1)pwR3(^Fz
import org.rut.util.algorithm.support.SelectionSort; g>-pC a
import org.rut.util.algorithm.support.ShellSort; [Gop-Vi/~
c.dk4v%Y5
/** L[lX?g?Ob
* @author treeroot !iA3\Ai"
* @since 2006-2-2 ADK)p?
* @version 1.0 `-fWNHs
*/ {L~j;p_G&
public class SortUtil { fqrQ1{%UH
public final static int INSERT = 1; O2;FaASF
public final static int BUBBLE = 2; fb-Lp#!T39
public final static int SELECTION = 3; 39to5s,
public final static int SHELL = 4; H xs'VK*
public final static int QUICK = 5; ]xC#XYE:dy
public final static int IMPROVED_QUICK = 6; J{;XNf =
public final static int MERGE = 7; vz5x{W
public final static int IMPROVED_MERGE = 8; 5{Q5?M]
public final static int HEAP = 9; ( m/ujz
mSLA4[4{
public static void sort(int[] data) { uonCD8
sort(data, IMPROVED_QUICK); :No`+X[Kq
} ze2%#<
private static String[] name={ x1H1[0w,i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'yxN1JF
}; WoM;)Q
0DtewN{Z
private static Sort[] impl=new Sort[]{ kvcDa+#
new InsertSort(), ~MWI-oK
new BubbleSort(), \4Uhc3
new SelectionSort(), $inlI_
new ShellSort(), "Vh3hnS~
new QuickSort(), JguPXHa0
new ImprovedQuickSort(), Y`F)UwKK
new MergeSort(), 2[|52+zhc
new ImprovedMergeSort(), }`KK
new HeapSort() j9gn7LS
}; `eZzYe(N
]%M&pc3U
public static String toString(int algorithm){ )5T82=[h<
return name[algorithm-1]; Gyx4}pV
} .3 >"qv
')N[)&&Q{
public static void sort(int[] data, int algorithm) { `%QXaKO-
impl[algorithm-1].sort(data); OfG/7pw5%B
} "I)/|x\G*
r{>Q{$Q
public static interface Sort { 6/Iq@BZ&
public void sort(int[] data); <OY (y#x
} Q g~cYwX
mR["xDHD
public static void swap(int[] data, int i, int j) { /H4Z.|@
int temp = data; nTsKJX%\
data = data[j]; U#V&=~-
data[j] = temp; ~c,CngeL0
} T@wgWE<0y_
} mR|L'[l