[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; p{[Ol
} D<]z.33
int i1=l; -P^ 6b(
int i2=mid+1; nPD5/xW
for(int cur=l;cur<=r;cur++){ {YT!vD9.
if(i1==mid+1) Yu>VW\Fb
data[cur]=temp[i2++]; oyiEOC
else if(i2>r) YcBY[i0
data[cur]=temp[i1++]; ]2+7?QL,
else if(temp[i1] data[cur]=temp[i1++]; 0jF~cV
else !g-|@W
data[cur]=temp[i2++]; %tT&/F
} ! jm>
} oDXUa5x
gT22!
} RHZ5f0b4L
ri<E[8\
改进后的归并排序: TXWi5f[
a2 e-Q({
package org.rut.util.algorithm.support; uhz:G~x!
b)tvXiO1>
import org.rut.util.algorithm.SortUtil; FY|.eY_7 {
y'(l]F1]
/** J*vy-[w
* @author treeroot |$`)d87,
* @since 2006-2-2 l\vtz5L
* @version 1.0 !ZPaU11
*/ a$y=+4L
public class ImprovedMergeSort implements SortUtil.Sort { : " 9F.U
llXyM */
private static final int THRESHOLD = 10; s_}T-%\
,|,DXw
/* o$8v8="p
* (non-Javadoc) :UGc6
* &'uFy0d,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pwn"!pk
*/ NguJ[
public void sort(int[] data) { 0'{0kE[wn
int[] temp=new int[data.length]; - &Aw]+
mergeSort(data,temp,0,data.length-1); wws)**]J8
} &`[y]E'
O]o`!c
private void mergeSort(int[] data, int[] temp, int l, int r) { B{^o}:e
int i, j, k; `j{q$Y=AG
int mid = (l + r) / 2; uO%G,b
if (l == r) K+5S7wFDZ
return; po~V{>fUm
if ((mid - l) >= THRESHOLD) S-&[Tp+N
mergeSort(data, temp, l, mid); q-P$ \":
else W 0%FZ0l
insertSort(data, l, mid - l + 1); rnz9TmN:*1
if ((r - mid) > THRESHOLD) - |n\
mergeSort(data, temp, mid + 1, r); Yq-Nk:H|
else ua#sW
insertSort(data, mid + 1, r - mid); :biM}L
}u8o*P|,
for (i = l; i <= mid; i++) { ^tc2?T
temp = data; 5}@6euT5$
} -`x$a&}
for (j = 1; j <= r - mid; j++) { JY8wo5H
temp[r - j + 1] = data[j + mid]; Fsv:SL+5
} c+|,qm
int a = temp[l]; !VUxy
int b = temp[r]; AQ:cim`
for (i = l, j = r, k = l; k <= r; k++) { $R4[TQY).!
if (a < b) { :SjTkfU
data[k] = temp[i++]; ;$gZ?&
a = temp; 0vbiq
} else { m_{OCHS+
data[k] = temp[j--]; P{v>o,a.
b = temp[j]; =LEKFXqM
} !g{9]"Z1T
} , v,mBYaU
} <8nl}^d5
SV*h9LL
/** ~?TGSD@(
* @param data !4cO]wh5
* @param l 69AgPAv<k
* @param i y1z<{'2x
*/ T|dQY~n~
private void insertSort(int[] data, int start, int len) { ICwhqH&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1sKKmtgH
} HL-zuZa`Ju
} 9N5ptdP.d
} gU1E6V-Jm
} -S5M>W.Qb{
Ej\EuX
堆排序： $xqI3UaX
<Hw)},_*
package org.rut.util.algorithm.support; ckFnQhW
R r7r5
import org.rut.util.algorithm.SortUtil; ~RGZY/4
wmbjL=f Ia
/** ~Vq<nkWS
* @author treeroot e]R`B}vO
* @since 2006-2-2 \-3\lZ3qj
* @version 1.0 D5x }V
*/ 0T-y]&uo
public class HeapSort implements SortUtil.Sort{ aVsA5t\zi
)vVt{g
/* (non-Javadoc) Ln/6]CMl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >Hb>wlYR
*/ ."9t<<!
public void sort(int[] data) { s6Ox!)&
MaxHeap h=new MaxHeap(); Zo`Ku+RL2'
h.init(data); VbR/k,Co
for(int i=0;i h.remove(); rF C6"_
System.arraycopy(h.queue,1,data,0,data.length); S0?4}7`A
} J-C3k`%O
\7M+0Ul1
private static class MaxHeap{ pUtd_8
*PQu9>1w
void init(int[] data){ OL+dx`Y
this.queue=new int[data.length+1]; 0IU>KGJ-0s
for(int i=0;i queue[++size]=data; PAG.],"D
fixUp(size); 0?kaXD
} wcz|Zy
} pm$ZKM
pE.f}
private int size=0; :C6
ANB@cK_
private int[] queue; \\;i
<s/n8#i=H
public int get() { 7d&_5Tj:
return queue[1]; g3[Zh=+]E
} P2J{Ml#
U^jxKBq^
public void remove() { Cw`8[)=}o
SortUtil.swap(queue,1,size--); )X*?M?~\
fixDown(1); p0Cp\.
} `CCuwe<v
file://fixdown aRFLh
private void fixDown(int k) { WXz'H),R
int j; ;M,u,KH)/
while ((j = k << 1) <= size) { C? pi8Xg
if (j < size %26amp;%26amp; queue[j] j++; o!.\+[
if (queue[k]>queue[j]) file://不用交换 %jaB>4.A:
break; cI}qMc
SortUtil.swap(queue,j,k); VrL==aTYXs
k = j; ;A^0="x&
} e.pm`%5bO
} 1 o<l;:
private void fixUp(int k) { !: e(-
while (k > 1) { c)H(w
int j = k >> 1; 4dy2m!
if (queue[j]>queue[k]) -dX{ R_*
break; |Z%I3-z_DS
SortUtil.swap(queue,j,k); Xk#"rM< Y
k = j; @\-i3EhR
} J6x#c`Y
} yn&AMq ]o
ftBbO8e
} ]3.Un,F
8`bQ,E+2
} |$[WnYP
Q`$Q(/
SortUtil： IT,d(UV_
?39B(T
package org.rut.util.algorithm; _?UW,5=O
DG_tmDT4
import org.rut.util.algorithm.support.BubbleSort; ~ou1{NS
import org.rut.util.algorithm.support.HeapSort; ^qNh)?V?]I
import org.rut.util.algorithm.support.ImprovedMergeSort; w k1O*_76
import org.rut.util.algorithm.support.ImprovedQuickSort; !eb}jL
import org.rut.util.algorithm.support.InsertSort; P'o:Vhm_H
import org.rut.util.algorithm.support.MergeSort; C;m7~R
import org.rut.util.algorithm.support.QuickSort; mKWfRx*UdG
import org.rut.util.algorithm.support.SelectionSort; !3~VoNh,
import org.rut.util.algorithm.support.ShellSort; bu`8QQ"C
D&1*,`
/** *"rgK|CM$
* @author treeroot OkSJob
* @since 2006-2-2 3Cq/ o'
* @version 1.0 Izrf42 >k
*/ /Mq]WXq[V
public class SortUtil { D>& ;K{!
public final static int INSERT = 1; -fF1vJ7L
public final static int BUBBLE = 2; [~&C6pR
public final static int SELECTION = 3; npcB+6
public final static int SHELL = 4; uQy5t:!
public final static int QUICK = 5; %9.] bd|%F
public final static int IMPROVED_QUICK = 6; KX*Hev'K
public final static int MERGE = 7; 99XbpP55
public final static int IMPROVED_MERGE = 8; a }6Fj&hj
public final static int HEAP = 9; KM$5ZbCF:
?VM#Nf\
public static void sort(int[] data) { eF5?4??
sort(data, IMPROVED_QUICK); RusC5\BUX
} sA18f2
private static String[] name={ tT7< V{i4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Zf~[4Eeb
}; z`gdE0@;d3
QusEWq)}<
private static Sort[] impl=new Sort[]{ StUiL>9T#
new InsertSort(), k;V4%O
new BubbleSort(), @\gTi;u/x
new SelectionSort(), Q;O\tl
new ShellSort(), f'/@h Na3
new QuickSort(), s>sIji
new ImprovedQuickSort(), z1\G,mJK
new MergeSort(), Mwdh]I,#
new ImprovedMergeSort(), .K![<eZ
new HeapSort() /'|'3J]HP
}; m35Blg34
5ug?'TOj'
public static String toString(int algorithm){ Q(lj&!?1k
return name[algorithm-1]; |_l\.
} >V~q`htth
@Z$`c{V<
public static void sort(int[] data, int algorithm) { @_0g "Ul
impl[algorithm-1].sort(data); lD09(|`
} 0x'-\)v>3
i<D}"h|
public static interface Sort { %hK?\Pg3=E
public void sort(int[] data); NN5V|# P}
} &s!"pEZWck
]2n&DJu
public static void swap(int[] data, int i, int j) { t+0&B"
int temp = data; f~Dl;f~H_;
data = data[j]; cvn4Q-^
data[j] = temp; \GtZX!0
} |(Zv g}c_
} '< OB j