[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; s|2}2<+
} 1exfCm
int i1=l; 0>@[o8
int i2=mid+1; $$4W}Ug3U
for(int cur=l;cur<=r;cur++){ c-*2dV[@
if(i1==mid+1) 6+PGwCS
data[cur]=temp[i2++]; W[|[;{
else if(i2>r) <L&eh&4c
data[cur]=temp[i1++]; F,pCR7o>
else if(temp[i1] data[cur]=temp[i1++]; ;k}H(QI
else ~L'nzquF
data[cur]=temp[i2++]; c<jB6|.=2
} /gw Cwyo
} i@,]Z~]
*U_oao
} E474l
( 3;`bvYH"
改进后的归并排序: >S.91!x
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package org.rut.util.algorithm.support; 6N3@!xtpi
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import org.rut.util.algorithm.SortUtil; *s\sa+2al
/80YZ
/** o;QZe&
* @author treeroot SdI1}&
* @since 2006-2-2 P4 6,o
* @version 1.0 ~ 5"J(
*/ j)L1H* S%
public class ImprovedMergeSort implements SortUtil.Sort { /s`;9)G]9
%g w{[ /[A
private static final int THRESHOLD = 10; 6?o>{e7n^
6mHhC?
/* aD|Yo
* (non-Javadoc) }\Z5{OA
* aYVDp{_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eqhAus?)
*/ p(?3 V
public void sort(int[] data) { x)R0F\_
int[] temp=new int[data.length]; JIV8q HC
mergeSort(data,temp,0,data.length-1); .Dx2 ;lj
} c[5@\j\
oEIqA
private void mergeSort(int[] data, int[] temp, int l, int r) { f3&/r
int i, j, k; |!Ists
int mid = (l + r) / 2; A.U'Q|
if (l == r) @vAFfYU9<.
return; bn-=fb(
if ((mid - l) >= THRESHOLD) sTOFw;v%
mergeSort(data, temp, l, mid); hdj%|~Fj
else MaErx\
insertSort(data, l, mid - l + 1); H,|YLKg-|
if ((r - mid) > THRESHOLD) ) ,Npv3(
mergeSort(data, temp, mid + 1, r); <V S2]13
else SqqDV)Uih1
insertSort(data, mid + 1, r - mid); J]\^QMX
6~@5X}^<0
for (i = l; i <= mid; i++) { usH%dzKK
temp = data; 5"gL.Ez
} rzT{-DZB[4
for (j = 1; j <= r - mid; j++) { kM`7EPk
temp[r - j + 1] = data[j + mid]; CQ18%w6
} Ja [#[BJ?
int a = temp[l]; X6kaL3L}
int b = temp[r]; {US>)I
for (i = l, j = r, k = l; k <= r; k++) { !*bdG(pK
if (a < b) { oHsP?%U
data[k] = temp[i++]; OjATSmZ@@
a = temp; o?\Gm
} else { XhA4:t
data[k] = temp[j--]; B5`;MQJ
b = temp[j]; o9+Q{|r
} WZK :.y
} }`]]b+_b>@
} #Fzb8Yo
1eiw3WU;
/** -0DZ::
* @param data FG#nap{
* @param l hS_.l}0yf
* @param i iT$d;5_pU
*/ 8&?p
private void insertSort(int[] data, int start, int len) { NWnWk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U8[Qw}T P
} G?ZC9w]rA
} mATH*[Y
} 5rN7':(H!%
} Gh+f1)\FA"
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堆排序： ?Cc :)
3):?ZCw7y
package org.rut.util.algorithm.support; +7Rt{C,
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import org.rut.util.algorithm.SortUtil; 2@*<9-9
6sy,A~e
/** .hne)K%={y
* @author treeroot hgwn> p:S#
* @since 2006-2-2 oG\>--
* @version 1.0 K0 QH?F
*/ |*1xrM:v~
public class HeapSort implements SortUtil.Sort{ r\RFDj
hXTYTbTX
/* (non-Javadoc) Q@Dkl F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Y8qWJU
*/ ?FDJqJM
public void sort(int[] data) { 8})|^%@n
MaxHeap h=new MaxHeap(); tWX7dspx/
h.init(data); i'iO H|s
for(int i=0;i h.remove(); s9 &)Fv-#V
System.arraycopy(h.queue,1,data,0,data.length); y9ip[Xn-$:
} =h7[E./U1
|?yE^$a
private static class MaxHeap{ xD^wTtT
)@,N7Y1h
void init(int[] data){ L6xB`E9
this.queue=new int[data.length+1]; AoU_;B\b%
for(int i=0;i queue[++size]=data; q#m!/wod
fixUp(size); :mn(0 R~
} iLQSa7
} )*W=GY*
RUqO!s~#rY
private int size=0; KG-y)qXu
ph+M3q(z
private int[] queue; h,~tXj
$$\V2%v
public int get() { ;Rs.rl>;t/
return queue[1]; ?61L|vr
} ka8$dfC
ajGcKyj8i
public void remove() { FvAbh]/4
SortUtil.swap(queue,1,size--); s!aO*\[<h
fixDown(1); 3l$E8?[Zwi
} C$t.C rxx
file://fixdown uct=i1+ fE
private void fixDown(int k) { eX@v7i,}
int j; "&Gw1.p
while ((j = k << 1) <= size) { A`IHP{aB
if (j < size %26amp;%26amp; queue[j] j++; \*Ts)EW
if (queue[k]>queue[j]) file://不用交换 3jXR"@Z-
break; J ZA*{n2
SortUtil.swap(queue,j,k); R qnWtE
k = j; @]E]W#xAn
} W w^7^q&
} aU4R+.M7@
private void fixUp(int k) { <c(&T<$
while (k > 1) { _TrZ'iL}T
int j = k >> 1; N6WPTUQ1mF
if (queue[j]>queue[k]) rykj2/O
break; "% SX@
SortUtil.swap(queue,j,k); w"BIv9N
k = j; t@6w$5:}
} *.:!Ax
} 1y 1_6TZ+
Q7L)f71i
} */4tJG1U
@K7ebYr?
} <o~t$TH
+;YE)~R?
SortUtil： O/(3 87=U
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package org.rut.util.algorithm; s:3aRQ%
)dqR<)
import org.rut.util.algorithm.support.BubbleSort; 7:z>+AM[r
import org.rut.util.algorithm.support.HeapSort; p?}f|mQS)
import org.rut.util.algorithm.support.ImprovedMergeSort; '^e0Ud,
import org.rut.util.algorithm.support.ImprovedQuickSort; hI*`>9l
import org.rut.util.algorithm.support.InsertSort; |y klT
import org.rut.util.algorithm.support.MergeSort; 'y< t/qo
import org.rut.util.algorithm.support.QuickSort; bBy'v/
import org.rut.util.algorithm.support.SelectionSort; hH#lTye
import org.rut.util.algorithm.support.ShellSort; pa>p%
axOi5
/** $y8mK|3.3u
* @author treeroot &ycjSBK
* @since 2006-2-2 0T(O'v}.
* @version 1.0 c!.=%QY
*/ 0h^uOA; c
public class SortUtil { vf6`s\6
public final static int INSERT = 1; 5QKRI)XpZ
public final static int BUBBLE = 2; mlD%d!.
public final static int SELECTION = 3; 15o9CaQw4"
public final static int SHELL = 4; :DDO=
public final static int QUICK = 5; =n)JJS94
public final static int IMPROVED_QUICK = 6; EK^JLvyT
public final static int MERGE = 7; s;anP0-O
public final static int IMPROVED_MERGE = 8; O5ucI$s
public final static int HEAP = 9; u$apH{
%B[YtWqm`/
public static void sort(int[] data) { :wFb5"
sort(data, IMPROVED_QUICK); fdN45in=>
} ?){0-A4
private static String[] name={ fDL3:%D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Yd[U
}; 3(aRs?/O
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private static Sort[] impl=new Sort[]{ mluW=fE
new InsertSort(), b*cW<vX}~
new BubbleSort(), :b.3CL\.6
new SelectionSort(), a:=q8Qy
new ShellSort(), $[)6H7!U)
new QuickSort(), ThjUiuWe
new ImprovedQuickSort(), @mvIt
new MergeSort(), >Dk1axZ!>/
new ImprovedMergeSort(), fKFnCng
new HeapSort() ixIh T
}; rH[5~U
dz{#"No0
public static String toString(int algorithm){ Cq-hPa}2
return name[algorithm-1]; ~o:rM/!Ba
} =s`XZkh
AqKHjCI
public static void sort(int[] data, int algorithm) { | -JI`!7
impl[algorithm-1].sort(data); s[Y)d>~\$=
} mYntU^4f
wYZye^7
public static interface Sort { W/b"a?wE{
public void sort(int[] data); s.f`.o
} d&/^34gn
d^ 2u}^kG
public static void swap(int[] data, int i, int j) { s>LA3kT
int temp = data; f1)HHUB
data = data[j]; W/#KX}4
data[j] = temp; Kl4isGcr]
} 7h(HG?2Y
} ) ~ l\