[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; .%{B=_7
} ?4U4o<
int i1=l; S*=^I2;
int i2=mid+1; |" WL
for(int cur=l;cur<=r;cur++){ S9P({iZK
if(i1==mid+1) vD9\i*\2
data[cur]=temp[i2++]; l[IL~
else if(i2>r) |n)4APX\Q
data[cur]=temp[i1++]; p0 X%^A,4
else if(temp[i1] data[cur]=temp[i1++]; zl6]N3+4
else wkGr}
data[cur]=temp[i2++]; Iy49o!
} i8k} B o
} fMFkA(Of^
2F`#df
} yQUrHxm
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改进后的归并排序: +B " aUF
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package org.rut.util.algorithm.support; [n| }>
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import org.rut.util.algorithm.SortUtil; iB(?}SaAZ
m!G(vhA,_w
/** lAM)X&}0
* @author treeroot e-P{)L<s5
* @since 2006-2-2 H[p~1%Lq
* @version 1.0 VD7-;
*/ esA^-$
public class ImprovedMergeSort implements SortUtil.Sort { |(*btdqy3
I+;e#v,%U
private static final int THRESHOLD = 10; 1Z)P.9c
hWbu Z%
/* #*.4Jv<R
* (non-Javadoc) +58^{_k+%
* FS&QF@dtgf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1aO(+](;
*/ MbCz*oW
public void sort(int[] data) { *Vq'%b9
int[] temp=new int[data.length]; ]Ss63Vd
mergeSort(data,temp,0,data.length-1); l<uI-RX"
} Uz,P^\8^$
Y\_mqd
private void mergeSort(int[] data, int[] temp, int l, int r) { /nA>ox78
int i, j, k; F/lL1nTdK
int mid = (l + r) / 2; {'A 15
if (l == r) JUA%l
return; jZqa+nG51
if ((mid - l) >= THRESHOLD) [dP<A?s
mergeSort(data, temp, l, mid); ]~dB|WB
else ,&4 [`d
insertSort(data, l, mid - l + 1); 8A]8yX =
if ((r - mid) > THRESHOLD) 0'r}]Mws
mergeSort(data, temp, mid + 1, r); >S`=~4
else @HMH>;haE
insertSort(data, mid + 1, r - mid); flqr["czwK
5OGwOZAj52
for (i = l; i <= mid; i++) { hs;|,r
temp = data; d7b`X<=@s
} NiVLx_<Pr'
for (j = 1; j <= r - mid; j++) { X%-hTl
temp[r - j + 1] = data[j + mid]; CPNV\qCY
} .O0eSp|e
int a = temp[l]; j -o
int b = temp[r]; KYB3n85 1
for (i = l, j = r, k = l; k <= r; k++) { ,?j!c*
if (a < b) { k7*-v/*S
data[k] = temp[i++]; .aa7*e
a = temp; DL~! ^fx
} else { 0K.$C~C
data[k] = temp[j--]; "gI-S[
b = temp[j]; T<7}IH$6xE
} E#m^.B-}
} YK8l#8K
} W3\+51P
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/** CpN*1s})d
* @param data XU}i<5
* @param l YGChVROG~
* @param i !vl1#@
*/ bupW*fD:
private void insertSort(int[] data, int start, int len) { %1;Y`>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8cY5:plK
} K[noW
} K6B6@
} s!YX<V
} *B&i`tq
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堆排序： aRWj+[[7y
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package org.rut.util.algorithm.support; rM~Mqpk
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import org.rut.util.algorithm.SortUtil; :+_H%4+
Z] cFbl\ma
/** ]OKKR/:
* @author treeroot b9.7j!W
* @since 2006-2-2 u8A,f}D 3
* @version 1.0 L~|_)4
*/ l3MA&&++KF
public class HeapSort implements SortUtil.Sort{ Aj\m57e,6
r7U[QTM%
/* (non-Javadoc) uKIR$n"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iN u k5
*/ <4?(|Vh[m]
public void sort(int[] data) { ;erxB6*
MaxHeap h=new MaxHeap(); !&KE">3Qu
h.init(data); 65&+Fv
for(int i=0;i h.remove(); }VH`\g}
System.arraycopy(h.queue,1,data,0,data.length); = "Lb5!
} E0r#xmk
:]\-GJV5
private static class MaxHeap{ ezJ^ r,D|
M#],#o*G
void init(int[] data){ 9J49s1
this.queue=new int[data.length+1]; u`+kH8#
for(int i=0;i queue[++size]=data; /6N!$*8
fixUp(size); /WAOpf5
} `a7b,d
} K^AIqL8
O'~^wu.
private int size=0; <3k9 y^0
\@6w;tyi
private int[] queue; B$97"$#u
i"!j:YEo
public int get() { LGRhCOP:
return queue[1]; G @L`[Wu
} :NwFJc
.0y .0=l
public void remove() { Y5IQhV.
SortUtil.swap(queue,1,size--); Y-DHW/Z~
fixDown(1); kafj?F
} c&L|e$C]
file://fixdown >?X(,c
private void fixDown(int k) { F JxH{N6a
int j; jvE&%|Ngw
while ((j = k << 1) <= size) { ,}OQzK/"mP
if (j < size %26amp;%26amp; queue[j] j++; ",E$}= ,Z
if (queue[k]>queue[j]) file://不用交换 _32 o7}!x
break; !| GD8i
SortUtil.swap(queue,j,k); =WFG[~8
k = j; #)%dG3)e
} 9qJ:h-?M
} Qo["K}Ty
private void fixUp(int k) { a,*|*Cv
while (k > 1) { 3 _DJ
int j = k >> 1; 5=_))v<Tp
if (queue[j]>queue[k]) 'khhn6itA
break; N*hx;k9
SortUtil.swap(queue,j,k); cC`PmDGq
k = j; s)~H_,
} /$ueLa
} D z>7.'3
7LW%:0
} $xj>j
euh rEjwkH
} hKK"D:?PRs
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SortUtil： fJG!TQJ[Y
%LdFS~
package org.rut.util.algorithm; yD&UH_ 1g
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import org.rut.util.algorithm.support.BubbleSort; ,?!4P+ob
import org.rut.util.algorithm.support.HeapSort; 3:P "6mN
import org.rut.util.algorithm.support.ImprovedMergeSort; xOpCybmc
import org.rut.util.algorithm.support.ImprovedQuickSort; X9uYqvP\(
import org.rut.util.algorithm.support.InsertSort; :+S~N)0j^
import org.rut.util.algorithm.support.MergeSort; N^tH&\G\m
import org.rut.util.algorithm.support.QuickSort; 0',-V2
import org.rut.util.algorithm.support.SelectionSort; h IUO=f
import org.rut.util.algorithm.support.ShellSort; [E%Ov0OC
z 4`H<Pn
/** e#uF?v]O
* @author treeroot &f>1/"lnd\
* @since 2006-2-2 _/[(&}M
* @version 1.0 w8AHs/'r
*/ cLnvb!g'#
public class SortUtil { h)C`w'L
public final static int INSERT = 1; OOX}S1lA
public final static int BUBBLE = 2; 4^BHJOvs
public final static int SELECTION = 3; NA8$G|.?
public final static int SHELL = 4; wn{DY v7B
public final static int QUICK = 5; 'St\$X
public final static int IMPROVED_QUICK = 6; {BJn9B
public final static int MERGE = 7; J{5&L &4
public final static int IMPROVED_MERGE = 8; GCA?sFwo>
public final static int HEAP = 9; |/35c0IM
{d,~=s0T
public static void sort(int[] data) { 'd 6z^Z6
sort(data, IMPROVED_QUICK); A@lY{e
} PP)-g0^@
private static String[] name={ !tofO|E5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ::rKW*?
}; -}*YfwK
MXU8QVSY"
private static Sort[] impl=new Sort[]{ 41`&/9:"_M
new InsertSort(), 4m$Xjj`vE
new BubbleSort(), vb Mv8Nk
new SelectionSort(), ];o[Yn'>o
new ShellSort(), ~~'UQnUN4
new QuickSort(), zc#aQ.
new ImprovedQuickSort(), 5S?+03h~
new MergeSort(), [S!_ubP5
new ImprovedMergeSort(), 9i+SU|;j
new HeapSort() w[wrZ:[
}; </8F
J'>i3eLq
public static String toString(int algorithm){ tO^KCnL
return name[algorithm-1]; ~<#!yRy>r
} a5xp[TlXn.
`[Xff24(eb
public static void sort(int[] data, int algorithm) { A5> ,e|
impl[algorithm-1].sort(data); |cE 69UFB
} $>fMu
Z6`[dAo
public static interface Sort { 2oFHP_HVfu
public void sort(int[] data); As7Y4w*+
} mN:p=.& <
RK`C31Ws
public static void swap(int[] data, int i, int j) { mxV0"$'Fm
int temp = data; KoNJ;YiKtN
data = data[j]; /Z*XKIU6v/
data[j] = temp; g4 |s9RMD
} JH;\wfrD
} 7 a}qnk%