[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; !V-(K_\t
} >Q:h0b_$U
int i1=l; K9ek
int i2=mid+1; @a,}k<@E
for(int cur=l;cur<=r;cur++){ 1NkJs&
if(i1==mid+1) dUv(Pu(.#
data[cur]=temp[i2++]; 6pbtE]
else if(i2>r) 9ePom'1f1
data[cur]=temp[i1++]; 77-G*PI*I
else if(temp[i1] data[cur]=temp[i1++]; p$mt&,p
else KPA.5,ai
data[cur]=temp[i2++]; sY:=bU^P
} B`:l;<&jX
} 3Scc"9]
slaH2}$xR
} -6$GM J7
W&v|-#7=6
改进后的归并排序: O=oIkvg
`%*`rtZ+H.
package org.rut.util.algorithm.support; a|z@5r%
mDO! o
import org.rut.util.algorithm.SortUtil; 'xGTaKlm,
.R)uk
/** 51;[R8'w
* @author treeroot ~SS3gLv
* @since 2006-2-2 *Tr9pq%m
* @version 1.0 B+MnT{
*/ KxDp+]N]
public class ImprovedMergeSort implements SortUtil.Sort { <u/(7H
Cv[1HO<
private static final int THRESHOLD = 10; nPk&/H%5hn
+'wO:E1( w
/* `><E J'h
* (non-Javadoc) &0]5zQ
* Kl<NAv%j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )KOIf{
*/ }i J$&CJ
public void sort(int[] data) { tVh"C%Vkr
int[] temp=new int[data.length]; t9)S^: 0
mergeSort(data,temp,0,data.length-1); AcHeZb8b
} vU$n*M1`$
=MT'e,T
private void mergeSort(int[] data, int[] temp, int l, int r) { XSGBC:U)l
int i, j, k; k 7:Z\RGy
int mid = (l + r) / 2; U+zntB
if (l == r) V[n,fEPBr
return; ja6V*CWb
if ((mid - l) >= THRESHOLD) ;SX~u*`R
mergeSort(data, temp, l, mid); ;=WwJ Np~
else '4CD }
insertSort(data, l, mid - l + 1); KDb`g}1Q
if ((r - mid) > THRESHOLD) 0{
mergeSort(data, temp, mid + 1, r); 3-'3w,
else ]^,!;do
insertSort(data, mid + 1, r - mid); "C?H:8W
@9R78Zra
for (i = l; i <= mid; i++) { )S;3WnQ)
temp = data; ;]@Pm<f
} #qW#>0U
for (j = 1; j <= r - mid; j++) { hVAatn[
temp[r - j + 1] = data[j + mid]; 0o:R:*
} Wb[k2V
int a = temp[l]; ("{"8
int b = temp[r]; wB&5q!{!
for (i = l, j = r, k = l; k <= r; k++) { Q>71uM%e`
if (a < b) { BGHZL~
data[k] = temp[i++]; 3gnO)"$
a = temp; RC?vU
} else { cICfV,j
data[k] = temp[j--]; Z{gm4YV
b = temp[j]; ;#9ioGx
} %>5>wP
} _?bO /y_y
} .h\Py[h<^
|>Fz:b d
/** V7.g,
* @param data u:mndTpB6x
* @param l M93*"jA
* @param i G4&?O_\;
*/ U`5/tNx
private void insertSort(int[] data, int start, int len) { \>G}DGz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t#3_M=L
} |* ^LsuFb
} fI1 9p Q
} H8g%h}6h
} 6P:fM Y
0a bQY
堆排序： t=9f:,I$
jsx&h Y%(
package org.rut.util.algorithm.support; crN*eFeW
57=d;Yg e
import org.rut.util.algorithm.SortUtil; K:GEC-
E@yo/S
/** j=Izwt>
* @author treeroot +k~0&lZi
* @since 2006-2-2 %M))Ak4~a
* @version 1.0 (w:,iw#
*/ boHbiE
public class HeapSort implements SortUtil.Sort{ oOC&w0
_ Yc"{d3S
/* (non-Javadoc) p|8ZHR+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *ra>Kl0
*/ vbd)L$$20+
public void sort(int[] data) { /'5d0' ,M
MaxHeap h=new MaxHeap(); ch25A<O<R.
h.init(data); #9Ect@?N0
for(int i=0;i h.remove(); V1pBKr)v
System.arraycopy(h.queue,1,data,0,data.length); `*BV@
} 6q>}M
&9|L Z9K
private static class MaxHeap{ - jCj_@n
j/fniyJ)
void init(int[] data){ %ek0NBE7
this.queue=new int[data.length+1]; fGqX dlP
for(int i=0;i queue[++size]=data; AI|+*amTd
fixUp(size); gPb.%^p
} jT}={[9b
} MtaGv#mJ
8>Cf}TvErx
private int size=0; yj#*H
>TY;l3ew
private int[] queue; _U-`/r o
0y+^{@lU
public int get() { @!u{>!~0
return queue[1]; +L`}(yLJ)9
} GqR|hg
sZT~5c8
public void remove() { ^D6TeH
SortUtil.swap(queue,1,size--); Z"%.
fixDown(1); euVDrJ^
} C\~}ySQc.e
file://fixdown GK!@|Kk8q7
private void fixDown(int k) { T^(W _S
int j; J"LLj*,0"
while ((j = k << 1) <= size) { {it}\[3
if (j < size %26amp;%26amp; queue[j] j++; tx~,7TMS/
if (queue[k]>queue[j]) file://不用交换 ~!qnKM>[
break; NjpWK;L
SortUtil.swap(queue,j,k); u[Kz^ga<
k = j; lwrh4<~\,*
} r)>3YM5
} B^r?N-Z A
private void fixUp(int k) { =gD)j&~}_
while (k > 1) { X%j`rQk`
int j = k >> 1; yF?O+9R A
if (queue[j]>queue[k]) "a(4])
break; !Q15qvRS
SortUtil.swap(queue,j,k); *DC/O( 0
k = j; ]& ckq
} 8.n#@%
} T3@2e0u )
_:=\h5}8
} HbI{Xf[6LP
,;Wm>V)o
} vt2. i$u
G<D8a2q
SortUtil： hTzj{}w
\<*F#3U1
package org.rut.util.algorithm; (${ #l
tWTHyL
import org.rut.util.algorithm.support.BubbleSort; #~)A#~4O
import org.rut.util.algorithm.support.HeapSort; =eUKpYI
import org.rut.util.algorithm.support.ImprovedMergeSort; 5X=1a*2']
import org.rut.util.algorithm.support.ImprovedQuickSort; Zk((VZ(y
import org.rut.util.algorithm.support.InsertSort; 2[ofz}k]r)
import org.rut.util.algorithm.support.MergeSort; gBv!E9~l
import org.rut.util.algorithm.support.QuickSort; I`X!M!dB)
import org.rut.util.algorithm.support.SelectionSort; [`b,SX x
import org.rut.util.algorithm.support.ShellSort; gac31,gH
+]A,fmI.
/** uX3yq<lK"
* @author treeroot vJ}WNvncVF
* @since 2006-2-2 qnboXGaFu
* @version 1.0 RQ=$, i`
*/ zKGZg>q
public class SortUtil { )'T].kWW
public final static int INSERT = 1; 7PMz6
public final static int BUBBLE = 2; T` h%=u|D
public final static int SELECTION = 3; &)tiO>B^6
public final static int SHELL = 4; ?Y3i-jY
public final static int QUICK = 5; Zf3(! a[
public final static int IMPROVED_QUICK = 6; Ig}hap]G
public final static int MERGE = 7; G\dPGPPM
public final static int IMPROVED_MERGE = 8; i/+^C($'f
public final static int HEAP = 9; :ig=zETM
5>.ATfAsV
public static void sort(int[] data) { #%@bZ f
sort(data, IMPROVED_QUICK); CLzF84@W=
} hS8M|_
private static String[] name={ \tYImh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jq%<Z,rh
}; H\oxj,+N
o#\L4P(J
private static Sort[] impl=new Sort[]{ ~*/ >8R(Y
new InsertSort(), @i!+Z
new BubbleSort(), <Y7j'n
new SelectionSort(), UX63BA
new ShellSort(), @3KSoA"^
new QuickSort(), XjN=UhC
new ImprovedQuickSort(), klnNBo!
new MergeSort(), 94PI
new ImprovedMergeSort(), 9)v]jk
new HeapSort() v)_c*+6u
}; jn|NrvrX
GqL&hbpi
public static String toString(int algorithm){ :JG5)H}j+
return name[algorithm-1]; `aAE4Ry?
} Zt!$"N.,
e8("G[P>
public static void sort(int[] data, int algorithm) { Z,2?TT|p
impl[algorithm-1].sort(data); \#]%S/_ A
} 8(Te^] v#
xaVX@ 3r.3
public static interface Sort { Kt*fQ `9
public void sort(int[] data); / ^d9At614
} ^6kl4:{idE
<M1*gz
public static void swap(int[] data, int i, int j) { _lkVT']
int temp = data; 1a(\F7
data = data[j]; 2~f*o^%l
data[j] = temp; KPO w
} /kG?I_z
} rtz-kQ38R