[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; 9!&fak_
} V i V3Y
int i1=l; dI};l
int i2=mid+1; V.?N29CA|
for(int cur=l;cur<=r;cur++){ |uf{:U)
if(i1==mid+1) xM"k qRZ
data[cur]=temp[i2++]; pUi|&F K">
else if(i2>r) 2dg+R)%
data[cur]=temp[i1++]; 'B>fRN
else if(temp[i1] data[cur]=temp[i1++]; AwN7/M~'
else ;/l$&:
data[cur]=temp[i2++]; _~]~ssn,1
} >]s\%GO
} noJ5h|
|*W_
} 2:3-mWE
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改进后的归并排序: Er509zZ,[
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package org.rut.util.algorithm.support; :p%G+q2
Y>W$n9d&G2
import org.rut.util.algorithm.SortUtil; o}O"
oe$&X&
/** ?tx%KU\3
* @author treeroot >U.
* @since 2006-2-2 Ad$CHx-
* @version 1.0 rKxIOJ,T
*/ 0N9`WK
public class ImprovedMergeSort implements SortUtil.Sort { nE;^xMOK!
t+y$i@R:
private static final int THRESHOLD = 10; HGIPz{/5U
{S[+hUl
/* %c:v70*h=
* (non-Javadoc) OI/m_xx@j
* j=c=Pe"?u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7m='-_w)?w
*/ r?Q`b2Q
public void sort(int[] data) { +c'b=n9j
int[] temp=new int[data.length]; uzG{jc^
mergeSort(data,temp,0,data.length-1); KT'Ebb]
} K=lm9K
tf<}%4G
private void mergeSort(int[] data, int[] temp, int l, int r) { #x|xL7
int i, j, k; /,Unp1D
int mid = (l + r) / 2; !A_<(M<
if (l == r) Q5Yy \M
return; !'m MGxkEb
if ((mid - l) >= THRESHOLD) SUGB)vEa
mergeSort(data, temp, l, mid); 4PdJ
else p=13tQS<
insertSort(data, l, mid - l + 1); ^<u9I5?
if ((r - mid) > THRESHOLD) 5@c/,6l
mergeSort(data, temp, mid + 1, r); n@1;5)&k~
else q-? k=RX`
insertSort(data, mid + 1, r - mid); PH!^ww6
CcDmZ
for (i = l; i <= mid; i++) { kD"BsL*6!
temp = data; Qk`ykTS!
} (p6$Vgdt
for (j = 1; j <= r - mid; j++) { [k<"@[8)
temp[r - j + 1] = data[j + mid]; V/N:Of:\R
} m 0jm$>:Z
int a = temp[l]; ''.P=
int b = temp[r]; Q#gzk%jL@
for (i = l, j = r, k = l; k <= r; k++) { '2LK(uaU
if (a < b) { 0 $Ygt0d
data[k] = temp[i++]; Q5K<ECoPk
a = temp; /xS4>@hn
} else { MZPXI{G
data[k] = temp[j--]; oY NIJXln
b = temp[j]; }253Q!f
} xvpCOoGsz
} PeU>h2t
} %5[,U)X"
nf%"7y{dd
/** BIJlU(aF
* @param data g#W/WKvM
* @param l 8,VX%CS#q
* @param i xJcM1>cT>
*/ yiT)m]E d
private void insertSort(int[] data, int start, int len) { TK! D=M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2D'b7zPJ3
} /Ko{S_3<I
} H8lh.K
} #saK8; tp
} ='rSB.$Ctk
7A,QA5G]C
堆排序： bh Nqj
f52*s#4}
package org.rut.util.algorithm.support; Ng Jp2ut
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import org.rut.util.algorithm.SortUtil; k_,wa]ws$
<]w(1{q(
/** Sh@en\m=#S
* @author treeroot k'6Poz+<
* @since 2006-2-2 #.j[iN :+
* @version 1.0 JXhHitUD
*/ jWUpzf)q=T
public class HeapSort implements SortUtil.Sort{ j Z6]G{
MJyz0.9c
/* (non-Javadoc) {?+dVLa^;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E\_Wpk
*/ Q:v9C ^7
public void sort(int[] data) { NT1"?Thx|
MaxHeap h=new MaxHeap(); \gU=B|W
h.init(data); s3Wjg
for(int i=0;i h.remove(); 0`H)c) pP
System.arraycopy(h.queue,1,data,0,data.length); J$+K't5BZ
} U??T>
=!R+0
private static class MaxHeap{ arQEi
Sd9%tO9mf
void init(int[] data){ (>)f#t[9J
this.queue=new int[data.length+1]; 7^hwRZJ{
for(int i=0;i queue[++size]=data; Y%GIKtP
fixUp(size); 1s"/R
} R3dt-v
} asj*/eC$/i
)ZHo7X
private int size=0; N!=$6`d
ZC!GKWP2
private int[] queue; <+r<3ZBA
qX_( M2oLU
public int get() { <H]1 6
return queue[1]; +G.F'
} [t{ed)J
#"PRsMUw
public void remove() { =QG0:z)K<v
SortUtil.swap(queue,1,size--); {=Y3[
fixDown(1); 'P`L?/_3
} 8lJMD %Df:
file://fixdown )=9EShz!
private void fixDown(int k) { zZh\e,*
int j; tqMOhR
while ((j = k << 1) <= size) { Z\1wEGP7{
if (j < size %26amp;%26amp; queue[j] j++; USrBi[_ci\
if (queue[k]>queue[j]) file://不用交换 4Yx\U
break; i0jR~vF {B
SortUtil.swap(queue,j,k); QRw/d}8l
k = j; S!JwF&EW
} uK!G-1
} y5!fbmf
private void fixUp(int k) { m|8ljXX
while (k > 1) { 2y;J 11\
int j = k >> 1; %fzZpd]v=,
if (queue[j]>queue[k]) [W*xPXr*
break; i,R+C.6{
SortUtil.swap(queue,j,k); F,)\\$=,
k = j; U%qE=u-
} 3B^`xnV
} kCVO!@yZz
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} "I n[= 2w
;5.S"
} M~SbIk<#a<
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SortUtil： YB?5s`vr9d
),%(A~\
package org.rut.util.algorithm; -0G/a&ss
$KAOJc4<
import org.rut.util.algorithm.support.BubbleSort; 0^G5 zQlj
import org.rut.util.algorithm.support.HeapSort; xkPH_+4i8
import org.rut.util.algorithm.support.ImprovedMergeSort; >`S $(f
import org.rut.util.algorithm.support.ImprovedQuickSort; ~L55l2u7
import org.rut.util.algorithm.support.InsertSort; s<hl>vY_'
import org.rut.util.algorithm.support.MergeSort; Kc,=J?Ob
import org.rut.util.algorithm.support.QuickSort; i p"LoCE
import org.rut.util.algorithm.support.SelectionSort; yr"BeTrS.
import org.rut.util.algorithm.support.ShellSort; )^q7s&p/
!7fL'
/** 1SY`V?cu
* @author treeroot aZBS!X
* @since 2006-2-2 n72+X
* @version 1.0 x./l27}6
*/ OdWZYWj
public class SortUtil { +C8yzMN\
public final static int INSERT = 1; ~IhLjE
public final static int BUBBLE = 2; L&nqlH@+~
public final static int SELECTION = 3; N#!**Q 0
public final static int SHELL = 4; ZaKT~f%%z
public final static int QUICK = 5; \(g/::|
public final static int IMPROVED_QUICK = 6; +jifbf-
public final static int MERGE = 7; f*HEw
public final static int IMPROVED_MERGE = 8; 6_vhBYLf
public final static int HEAP = 9; Rg,]du u?
s ~Xa=_+D
public static void sort(int[] data) { ,!i!q[YkL9
sort(data, IMPROVED_QUICK); \]7i-[
} 3Gyw^_{J
private static String[] name={ %k8H'w\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A&8{0
}; 4 >2g&);B
R8(Bt73
private static Sort[] impl=new Sort[]{ +"8-)'
new InsertSort(), OMM5p=2Q
new BubbleSort(), >$ok3-tuU
new SelectionSort(), a*GiLq
new ShellSort(), vk>EFm8l
new QuickSort(), =j&qat
new ImprovedQuickSort(), !8ch&cr)o+
new MergeSort(), *ke9/hO1i
new ImprovedMergeSort(), >x0)
new HeapSort() ^W)h=49PN
}; X) O9PQ
: l&g5
public static String toString(int algorithm){ A."]6R<
return name[algorithm-1]; YZllfw$9
} //O9}-
Ku3/xcu:My
public static void sort(int[] data, int algorithm) { x } X1 O)
impl[algorithm-1].sort(data); VQe@H8>3
} 3l?-H|T
A KjCm*K(q
public static interface Sort { DM[gjfMXu
public void sort(int[] data); PS\n0
} 8Vf]K}d
fHc/5uYW
public static void swap(int[] data, int i, int j) { ;mtv
int temp = data; &E+2
data = data[j]; pGHn
data[j] = temp; L32[IL|
} 6f^q >YP
} [:Y`^iR.