[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Zz} o t
} PY.HZ/#d
int i1=l; Kl.*Q
int i2=mid+1; 8U@f/P
for(int cur=l;cur<=r;cur++){ t`6]eRR
if(i1==mid+1) RFbf2s\t
data[cur]=temp[i2++]; ;}Jv4Z
else if(i2>r) ~m fG Yk"
data[cur]=temp[i1++]; Q9cSrU[$
else if(temp[i1] data[cur]=temp[i1++]; qXtC7uNj$
else cpk\;1&t
data[cur]=temp[i2++]; !mK()#6
} Sd6O?&(
} 7Q!ksp
%i?
} Py*WHHO
bg|$1ue
改进后的归并排序: j*QdD\)
ZW;Ec+n_K
package org.rut.util.algorithm.support; )L&y@dy)
w yxPvI`
import org.rut.util.algorithm.SortUtil; |r+ x/,2-
fExFpR,`
/** 76T7<.S
* @author treeroot ~;oXLCL0})
* @since 2006-2-2 )y]Dmm
* @version 1.0 _!2lnJ4+5
*/ |4DN2P
public class ImprovedMergeSort implements SortUtil.Sort { pS8\B
E#P#{_BR^
private static final int THRESHOLD = 10; ;C-ds
}h1BAKg
/* FtJaX])b
* (non-Javadoc) !Mw/j`*
* ,xU#uyB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S(3h{Y"#
*/ E0qJ.v
public void sort(int[] data) { GpPM?
int[] temp=new int[data.length]; i?B<&'G
mergeSort(data,temp,0,data.length-1); T ?Om]:j
} 7s%D(;W_Mo
Q7u|^Gu,5
private void mergeSort(int[] data, int[] temp, int l, int r) { #c:@oe4v
int i, j, k; ~0CNCP
int mid = (l + r) / 2; Y1lUO[F j
if (l == r) \X %#-y
return; Vw;iE=L
if ((mid - l) >= THRESHOLD) < R"Y^]P=
mergeSort(data, temp, l, mid); !9gpuS[
else ^%*qe5J
insertSort(data, l, mid - l + 1); y a$yRsd`
if ((r - mid) > THRESHOLD) yPfx!9B
mergeSort(data, temp, mid + 1, r); yuC"V'
else Yjo$vQi
insertSort(data, mid + 1, r - mid); <nJGJ5JJ
QH><! sa
for (i = l; i <= mid; i++) { VP< zOk7
temp = data; 6MOwn*%5k
} 2L^/\!V#
for (j = 1; j <= r - mid; j++) { >W+,(kAS
temp[r - j + 1] = data[j + mid]; &LM@xt4"^[
} VXCB.C"
int a = temp[l]; 53/$8=
int b = temp[r]; ZWGelZP~
for (i = l, j = r, k = l; k <= r; k++) { W+u@UJi
if (a < b) { +;!^aNJ,
data[k] = temp[i++]; eAO@B
a = temp; G>^= Bm_$
} else { qh bagw~
data[k] = temp[j--]; .\H-?6R^
b = temp[j]; 5[\g87\
} bLl ?!G.
} /E/6(c
} 6&+dpr&c~=
\Uh/(q7
/** 0F uj-q
* @param data dw#pObH|`
* @param l HziQ%QR
* @param i B_#M)d O
*/ `!N.1RP _
private void insertSort(int[] data, int start, int len) { Wv5=$y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >mQD/U
} a%y*e+oM
} /p;OZf]
} GQ Flt_
} rSDI.m
e8SAjl"}
堆排序： 3I'7+?@@l
:V"e+I
package org.rut.util.algorithm.support; xz:
xNY&*jI
import org.rut.util.algorithm.SortUtil; |1kA6/
hRKJKQ@7
/** CZy!nR!
* @author treeroot _7v4S/V
* @since 2006-2-2 R(> oyxA[F
* @version 1.0 5 3+C;]J
*/ ixy:S1pI
public class HeapSort implements SortUtil.Sort{ o7tlkSZ
l [ m_<1L
/* (non-Javadoc) S41S+#7t*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <F}j;mX
*/ Lz9|"F"V
public void sort(int[] data) { iMM9a;G+
MaxHeap h=new MaxHeap(); j~rW 2(
h.init(data); NxH%%>o>
for(int i=0;i h.remove(); xE_~.EoB
System.arraycopy(h.queue,1,data,0,data.length); </9c=GoJ
} |I]G=.*E
,o2x,I
private static class MaxHeap{ ).Z U0fV
f U<<GK70
void init(int[] data){ iMYJVB=
this.queue=new int[data.length+1]; 1jK2*y
for(int i=0;i queue[++size]=data; \Pfm>$Ib=
fixUp(size); L$Xkx03lz>
} }lkU3Pf1U
} A;xH{vo{
sz7<u|
private int size=0; {Y+e|B0
&4t=Y`]SL
private int[] queue; }P!:0w3
?S)Pv53>}
public int get() { 4fL>Ou[YuX
return queue[1]; TD;u"
} OS~Z@'Eg
BMzS3;1_
public void remove() { d^Cv9%X
SortUtil.swap(queue,1,size--); 8N<2RT8W
fixDown(1); .4z_ohe
} ^6UE/4x!y
file://fixdown pmUC4=&e
private void fixDown(int k) { )\e0L/K@
int j; O2Y1D`&5
while ((j = k << 1) <= size) { 9j5k=IXg#a
if (j < size %26amp;%26amp; queue[j] j++; Y>i Qp/k:
if (queue[k]>queue[j]) file://不用交换 ;k1VY Ie}
break; #%CB`l
SortUtil.swap(queue,j,k); <7%#RJwe
k = j; Zh:@AFz:R
} W1}d6Sbg
} utdus:B#0
private void fixUp(int k) { 0d,&)
while (k > 1) { |@D%y&
int j = k >> 1; CrGDo9JdvT
if (queue[j]>queue[k]) U4NA'1yo
break; P#KTlH
SortUtil.swap(queue,j,k); mnYzn[d3U
k = j; c=B!\J<1
} }1Hy[4B(k\
} ~Ctq
{tXyz[;i1}
} Wh?3vZ^
T ^`R
} *kGk.a=
|r`0< `
SortUtil： FPAj}as
p?<T _9e
package org.rut.util.algorithm; eeUEqM$7EX
:N=S nyz
import org.rut.util.algorithm.support.BubbleSort; I!p[:.t7
import org.rut.util.algorithm.support.HeapSort; U7xQ 5lph
import org.rut.util.algorithm.support.ImprovedMergeSort; - [vH4~
import org.rut.util.algorithm.support.ImprovedQuickSort; .gwT?O,
import org.rut.util.algorithm.support.InsertSort; om0g'Qa
import org.rut.util.algorithm.support.MergeSort; >` |sBx
import org.rut.util.algorithm.support.QuickSort; 35#"]l"
import org.rut.util.algorithm.support.SelectionSort; ]#O~lq
import org.rut.util.algorithm.support.ShellSort; QL@}hw.F
8Vm)jnM
/** 4V 5
* @author treeroot -[A=\]RfJ
* @since 2006-2-2 x1.yi-
* @version 1.0 3AC/;WB9
*/ uWrvkLGN
public class SortUtil { Qvhy9Cr;
public final static int INSERT = 1; nxx&aq(._
public final static int BUBBLE = 2; N9AM% H$7
public final static int SELECTION = 3; :W}M$5|
public final static int SHELL = 4; X|pOw,"
public final static int QUICK = 5; 3Yf!H-(\uB
public final static int IMPROVED_QUICK = 6; S4>1d-
public final static int MERGE = 7; K1|xatx1V
public final static int IMPROVED_MERGE = 8; ?wj1t!83
public final static int HEAP = 9; L%[b6<
:8Ql(I
public static void sort(int[] data) { I#:4H2H6
sort(data, IMPROVED_QUICK); -*0U&]T
} |s[k= /~"
private static String[] name={ UV)!zgP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w;DRC5V>
}; }Lb[`H,}A
~i9'9PHX@
private static Sort[] impl=new Sort[]{ `^CIOCK%
new InsertSort(), 05[k@f$n
new BubbleSort(), ,=t}|!jx
new SelectionSort(), {edjvPlk
new ShellSort(), kiR+ Dsl
new QuickSort(), aL0,=g%
new ImprovedQuickSort(), <.c#l':
new MergeSort(), i{nFk',xX
new ImprovedMergeSort(), Xp_G9I,+
new HeapSort() %D<>F&h
}; {wVJv1*l
&/]g@^h9
public static String toString(int algorithm){ )p+6yH
return name[algorithm-1]; \m3ca-Y
} 0r'<aA`=I
4X:S#z
public static void sort(int[] data, int algorithm) { KIHr%
impl[algorithm-1].sort(data); ^@AIXBe
} ]c$)0O\O
;{K/W.R
public static interface Sort { A@#D_[~
public void sort(int[] data); YhFd0A?]
} 0%GQXiy
f-l(H="e
public static void swap(int[] data, int i, int j) { }*M>gvPo
int temp = data; ~"#[<d
data = data[j]; 1usLCG>w{
data[j] = temp; 9/I|oh_ G
} zQyt1&!
} 5"I8ric