[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; F.cKg~E|e
} /iw$\F |8
int i1=l; E'cI}q
int i2=mid+1; )C>8B`^S
for(int cur=l;cur<=r;cur++){ BA6(Owb
if(i1==mid+1) H{et2J<H
data[cur]=temp[i2++]; X8\UTHT&0
else if(i2>r) d^+0=_[PmK
data[cur]=temp[i1++]; $e, N5/O
else if(temp[i1] data[cur]=temp[i1++]; %:!ILN
else `Fx+HIng,
data[cur]=temp[i2++]; X-y3CO:&@h
} ~Z:)Y*
} O)8$aAJ)V
re)7h$f}
} GCj[ySCD
w'6sJ#ba(
改进后的归并排序: {HtW`r1)Tt
y!VL`xV
package org.rut.util.algorithm.support; p|>m 2(|
f=IF_|@^S
import org.rut.util.algorithm.SortUtil; bk|?>yd
e81+as
/** p5aqlYb6r
* @author treeroot f7b6!R;z_
* @since 2006-2-2 k![oJ.vHD
* @version 1.0 t"nxny9&
*/ sQmJ3 (:HO
public class ImprovedMergeSort implements SortUtil.Sort { ~X(2F#{<{
}z F,dst
private static final int THRESHOLD = 10; F<4>g+Ag
9Cs/B*3)b
/* }Ud'j'QMy
* (non-Javadoc) >zfFvx_q
* FA{'Ki`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jbe_r<{
*/ "0Z5cQjg
public void sort(int[] data) { 48_( 'z*>
int[] temp=new int[data.length]; x~ID[
mergeSort(data,temp,0,data.length-1); ]sI\.a
} oDWNOw
Te`MIR
private void mergeSort(int[] data, int[] temp, int l, int r) { uFuP%f!yY
int i, j, k; ]:}7-;$V
int mid = (l + r) / 2; LK<ZF=z]Z
if (l == r) y!T8(
return; QT=i>X
if ((mid - l) >= THRESHOLD) '$[a-)4
mergeSort(data, temp, l, mid); ?:6w6GwAA
else <Y"HCa{
insertSort(data, l, mid - l + 1); )<$<9!L4x
if ((r - mid) > THRESHOLD) *xN?5u%
mergeSort(data, temp, mid + 1, r); iO"ZtkeNr
else 2Vs+8/
insertSort(data, mid + 1, r - mid); jW{bP_,"
@ V_i%=go
for (i = l; i <= mid; i++) { $h[Q}uW
temp = data; %pLqX61t=
} TAq[g|N-;
for (j = 1; j <= r - mid; j++) { 4]ko
temp[r - j + 1] = data[j + mid]; E)|Bl>
} j8%Y[:~D
int a = temp[l]; R[rOzoNp0
int b = temp[r]; ]G^9PZ-
for (i = l, j = r, k = l; k <= r; k++) { ^a$L9p(
if (a < b) { 8T8]gM
data[k] = temp[i++]; >>cL"m
a = temp; lYey7tl{
} else { Sbeq%Iwm.
data[k] = temp[j--]; k"6v& O
b = temp[j]; `XM0Mm%
} >DN^',FEm
} ""m/?TZq'
} !}sF#
!3{. V\P)
/** cC]]H&'Hg+
* @param data E= .clA
* @param l N,.awA{
* @param i 221}xhn5
*/ ["e;8H[K)%
private void insertSort(int[] data, int start, int len) { i^8w0H<-@v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Qwp2h"t`
} ?A04qk
} }h* j{b,
} ey\(*Tu9
} )%]`uj>*[
}qOj^pkJ
堆排序： LU4k/
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package org.rut.util.algorithm.support; r^|AiYI)
(R)(%I1Oz
import org.rut.util.algorithm.SortUtil; (:2,Rr1"
jLu`DKB
/** OfSHZ;,
* @author treeroot {(,[
* @since 2006-2-2 1"5-doo
* @version 1.0 x O~t
*/ NWq>Z!x`
public class HeapSort implements SortUtil.Sort{ /?wH1 ,
<Fa]k'<^)
/* (non-Javadoc) J` J^C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *.]M1
*/ ,AO]4Ec
public void sort(int[] data) { Eu^?e
MaxHeap h=new MaxHeap(); ;>duY\$<
h.init(data); mOkf
for(int i=0;i h.remove(); 8aHs I(
System.arraycopy(h.queue,1,data,0,data.length); vS{zLXg
} <cn{S`
VdZmrq;?/
private static class MaxHeap{ 1dy>a=W
_*I@ J/
void init(int[] data){ cJnAwIs_e`
this.queue=new int[data.length+1]; UtebSQ+h\
for(int i=0;i queue[++size]=data; t)*MLg<C
fixUp(size); Rt[zZv
} UE[5Bw?4X
} QKAo}1Pq
u&!QP4$"z
private int size=0; EN =oA P
.1[[Y}
private int[] queue; \[Dxg`;4
9,4Lb]
public int get() { KfO$bmwmx
return queue[1]; '<A:`V9M}v
} YtzB/q8I
MMZdF{5@G
public void remove() { LvsNU0x
SortUtil.swap(queue,1,size--); /=5YHq>
fixDown(1); =-r[ s%t&
} CO`%eL~
file://fixdown Y 7a<3>
private void fixDown(int k) { QeK@++EVc
int j; L@"1d.k_
while ((j = k << 1) <= size) { f:_\S
if (j < size %26amp;%26amp; queue[j] j++; dQ5_=(9
if (queue[k]>queue[j]) file://不用交换 $rAHtr
break; |]dA`e&y
SortUtil.swap(queue,j,k); \M H\!
k = j; 1kG{z;9
} FZW)C'j
} 0wxlsny?
private void fixUp(int k) { Hqel1J
while (k > 1) { {R2gz]v4
int j = k >> 1; .#M'
if (queue[j]>queue[k]) x:h0/f
break; 9t.u9C=!F
SortUtil.swap(queue,j,k); 5AvbKT
k = j; gD"]uj<
} }=1#ANM1
} -R^OYgF
J33enQd
} xQ[~ c1
{bxTODt@
} 8n.sg({g
i`]-rM%J#
SortUtil： *o}LI6_u
WOW:$.VO^
package org.rut.util.algorithm; XYJ7k7zc+Y
'[E|3K5d
import org.rut.util.algorithm.support.BubbleSort; G:W4<w
import org.rut.util.algorithm.support.HeapSort; C@{#OOa
import org.rut.util.algorithm.support.ImprovedMergeSort; Uxla,CCp-
import org.rut.util.algorithm.support.ImprovedQuickSort; $\S;f"IM.
import org.rut.util.algorithm.support.InsertSort; [Yo3=(7J
import org.rut.util.algorithm.support.MergeSort; tE i-0J
import org.rut.util.algorithm.support.QuickSort; q5jLK)
import org.rut.util.algorithm.support.SelectionSort; K%Dksx7ow
import org.rut.util.algorithm.support.ShellSort; a J%&Y5L
6}Se$XMl
/** So&an !
* @author treeroot 85>WK+=
* @since 2006-2-2 Q_ zGs6
* @version 1.0 v9<7=D&x
*/ gk"0r\Eq
public class SortUtil { K+9oV[DMs
public final static int INSERT = 1; ~hubh!d=
public final static int BUBBLE = 2; 'S_kD! BO
public final static int SELECTION = 3; c6IFt4)g
public final static int SHELL = 4; udRum7XW3
public final static int QUICK = 5; >C6wm^bl
public final static int IMPROVED_QUICK = 6; $D`~X`
public final static int MERGE = 7; G#V}9l8Q
public final static int IMPROVED_MERGE = 8; aBo8?VV]8
public final static int HEAP = 9; ooJ ^8L
4>q^W$
public static void sort(int[] data) { I6bekOvP
sort(data, IMPROVED_QUICK); Dj=OUo[[d
} =5NM =K
private static String[] name={ KfC8~{O-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -7GF2 @
}; +f{CfWIKs
'b#`)w@/=
private static Sort[] impl=new Sort[]{ nWTo$*>W
new InsertSort(), F-!,U)
new BubbleSort(), [ \I&/?On
new SelectionSort(), NGl/F{<
new ShellSort(), g+5{&YD
new QuickSort(), 71AR)6<R
new ImprovedQuickSort(), =[wVRQ?
new MergeSort(), =@#[@Ia
new ImprovedMergeSort(), SU0K#:
new HeapSort() UjmBLXz@T
}; ]+1?T)<!
A>;Q<8rh
public static String toString(int algorithm){ goYRA_%cX
return name[algorithm-1]; F_8nxQ-
} _xgF?#
g~ tG
public static void sort(int[] data, int algorithm) { |ITSd%`3_
impl[algorithm-1].sort(data); f wN
} %9z N U
|_&Tu#er3
public static interface Sort { f_`gUMf
public void sort(int[] data); Fs^d-I
} P;%4Imq3
=^.f)
public static void swap(int[] data, int i, int j) { !FhK<#
int temp = data; FA 1E`AdU
data = data[j]; U#oe8(?#
data[j] = temp; [aM_.[bf
} P0m;AqS#R
} 5pNbO[