[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; ~~!iDF\
} [~m@'/
int i1=l; R*VRxQ,h6+
int i2=mid+1; HJ?p,V q5_
for(int cur=l;cur<=r;cur++){ -f@~{rK.L
if(i1==mid+1) &\#If:
data[cur]=temp[i2++]; k%YvJXL
else if(i2>r) ShbW[*5
data[cur]=temp[i1++]; `qnSq(tNq
else if(temp[i1] data[cur]=temp[i1++]; Clr~:2g\
else ?9'Ukw` g
data[cur]=temp[i2++]; =&jLwy
} =Y Je\745
} h}r.(MVt
.xo#rt9_"=
} LfOXgn\
B*!{LjXV
改进后的归并排序: ;)].Dj9
}iZO0C
package org.rut.util.algorithm.support; i eQQ{iGJH
4WU%K`jnXb
import org.rut.util.algorithm.SortUtil; b)/,
aqJ>l}{
/** 70hm9b-
* @author treeroot VN6h:-&iY
* @since 2006-2-2 0aj4.H*%
* @version 1.0 =$xxkc.~G
*/ @'>h P
public class ImprovedMergeSort implements SortUtil.Sort { mucKmb/
RG[b+Qjn
private static final int THRESHOLD = 10; =kFZ2/P2t(
u}Kc>/AF
/* 7vO3+lT/Y;
* (non-Javadoc) S bI7<_
* E>>@X^ =
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9jW/"
*/ M9so3L<N0
public void sort(int[] data) { $fZVh%
int[] temp=new int[data.length]; ;|7]%Z}%
mergeSort(data,temp,0,data.length-1); 3H"bivK
} vdA3
/`$9H|
private void mergeSort(int[] data, int[] temp, int l, int r) { (jhDO7
int i, j, k; j0P+<@y
int mid = (l + r) / 2; (#,0\ea{x
if (l == r) **p|g<wvY*
return; PCKgdh},
if ((mid - l) >= THRESHOLD) DvL/xlN
mergeSort(data, temp, l, mid); mz)Z =`hy
else 9?W!E_
insertSort(data, l, mid - l + 1); /WqiGkHV*
if ((r - mid) > THRESHOLD) %z1y3I|`[t
mergeSort(data, temp, mid + 1, r); MoAZ!cF8
else 6[wAX
insertSort(data, mid + 1, r - mid); /DLgE7iU%
3>O=d>
for (i = l; i <= mid; i++) { (.[HE ~ s?
temp = data; U&x)Q
} ^q{=mf`
for (j = 1; j <= r - mid; j++) { KlOL5"3
temp[r - j + 1] = data[j + mid]; wX?<o
} &\Kp_AR
int a = temp[l]; 3jx5Lou)&
int b = temp[r]; Z'/sZ3Q}
for (i = l, j = r, k = l; k <= r; k++) { RC{|:@]8
if (a < b) { Qmbl_#
data[k] = temp[i++]; 9qe<bds1
a = temp; JSKAlw
} else { +E5EOo{ `|
data[k] = temp[j--]; W[ZW=c
b = temp[j]; 2g'o5B\*
} /D@(o`a
} 8":O\^i
} _pZ2^OO@
gxa@da
/** 2o5Pbdel
* @param data ~# ~XDcc
* @param l (Qf"|3R4
* @param i )o51QgPy
*/ ZV,1IaO
private void insertSort(int[] data, int start, int len) { #0*OkZMt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Dq$co1eT
} RxUABF8b
} *.g@6IkAQ
} \9FWH}|
} (}^Qo^Vr
@-d0~.S
堆排序： )$Tcip`
XHX$Ur9
package org.rut.util.algorithm.support; y&F0IJ|`@M
:Ca]/]]
import org.rut.util.algorithm.SortUtil; ;_]Z3
e3YdHp
/** I{rW+<)QGC
* @author treeroot !/]vt?v#^
* @since 2006-2-2 (j*1sk
* @version 1.0 .PAR
*/ 4I %/}+Q
public class HeapSort implements SortUtil.Sort{ X.YMb .\<
L~Hgf/%5
/* (non-Javadoc) kuEB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZA;VA=)\8
*/ XwerQwO=
public void sort(int[] data) { '5:P,1tWU
MaxHeap h=new MaxHeap(); cbHb!Lbg
h.init(data); vbn'CY]QU
for(int i=0;i h.remove(); Gd=l{~
System.arraycopy(h.queue,1,data,0,data.length); (txr%Z0E
} 9gS.G2
N3C 8%
private static class MaxHeap{ J3;dRW
w =MZi=p
void init(int[] data){ R3`Rrj Z
this.queue=new int[data.length+1]; `%a+LU2
for(int i=0;i queue[++size]=data; utJz e
fixUp(size); gJn_Z7MgJ
} 'J0Erk8(
} wlY6h4c
E\ 'X|/$a
private int size=0; ab5uZ0@
_jhdqON6E
private int[] queue; Vv]81y15Q;
q%^vx%aL\
public int get() { W;^bc*a_
return queue[1]; 74hQ?Atw:
} $AI0&#NM
bM%c*_$F7
public void remove() { lMcSe8LBQa
SortUtil.swap(queue,1,size--); vW\|% @hW,
fixDown(1); W@:a3RJ
} :zL.dJwa
file://fixdown ":o1g5?
private void fixDown(int k) { fUJ\W"qya
int j; pPezy:
while ((j = k << 1) <= size) { l}Fa-9_'
if (j < size %26amp;%26amp; queue[j] j++; tG{?
if (queue[k]>queue[j]) file://不用交换 x:Nd>Fb
break; :2n(WXFFI
SortUtil.swap(queue,j,k); 1.5lJ:[G
k = j; ' YONRha
} tFYIKiq2
} $S|2'jc
private void fixUp(int k) { <;?&<qMo,P
while (k > 1) { aD5G0d?u
int j = k >> 1; X?F$jX|c
if (queue[j]>queue[k]) uy,ySBY
break; /_,} o7@t~
SortUtil.swap(queue,j,k); _z3Hl?qk=
k = j; 5xEk 7g.
} iN}BMd.U
} <_|H]^o
bnWKfz5
} `Al[gG?/!
O>![IH(L
} 0M?nXHA[
vGk}r
SortUtil： rLzYkZ
;[_w&"[6a
package org.rut.util.algorithm; )~](qLSl
^1%gQ@P
import org.rut.util.algorithm.support.BubbleSort; M?UlC
import org.rut.util.algorithm.support.HeapSort; OoFQ@zE7%
import org.rut.util.algorithm.support.ImprovedMergeSort; c0H8FF3
import org.rut.util.algorithm.support.ImprovedQuickSort; ~'4:{xH
import org.rut.util.algorithm.support.InsertSort; E"[^^<I
import org.rut.util.algorithm.support.MergeSort; Wv
import org.rut.util.algorithm.support.QuickSort; [|sKu#yW
import org.rut.util.algorithm.support.SelectionSort; b=#3p
import org.rut.util.algorithm.support.ShellSort; ;5*)kX
!6wbg
/** G0^O7w^5
* @author treeroot `R}D@
* @since 2006-2-2 3xW;qNj:!l
* @version 1.0 ;'Pi(TA)
*/ n ^T_pqV?X
public class SortUtil { TwZvz[u
public final static int INSERT = 1; qdn\8Pn
public final static int BUBBLE = 2; dwc$?Bg,5
public final static int SELECTION = 3; YLlw:jN
public final static int SHELL = 4; }G8RJxy
public final static int QUICK = 5; c-INVA)
public final static int IMPROVED_QUICK = 6; 328(W
public final static int MERGE = 7; ':7%@2Zo
public final static int IMPROVED_MERGE = 8; Q7y6</4f
public final static int HEAP = 9; -S=Zsr\
lA4Bq
public static void sort(int[] data) { NLJD}{8Ot
sort(data, IMPROVED_QUICK); n7vLw7
} /D[GXX
private static String[] name={ 7p?6j)rj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y/t:9Aau
}; y*M,&,$
Q<L.!%vu}
private static Sort[] impl=new Sort[]{ ]|q\^k)JU
new InsertSort(), 6'Sc=;;:
new BubbleSort(), Po[u6K2&
new SelectionSort(), tUmI#.v
new ShellSort(), b8J\Lm|J
new QuickSort(), `>fN?He
new ImprovedQuickSort(), @=c{GAj
new MergeSort(), ?lxI& h
new ImprovedMergeSort(), eiZv|?^0
new HeapSort() auP:r
}; i3.8m=>
[Cz.K?+#M
public static String toString(int algorithm){ ~Exd_c9
return name[algorithm-1]; KJa?TwnC
} ?ng?>!
7"f$;CN?~
public static void sort(int[] data, int algorithm) { y+RT[*bX5o
impl[algorithm-1].sort(data); VI%879Z\e
} /Q"nQSG
M* W=v
public static interface Sort { p[e|N;W8A
public void sort(int[] data); +w/Ax[K
} Ep}KIBBO
O.=~/!(
public static void swap(int[] data, int i, int j) { {6<7M
int temp = data; )o[ O%b
data = data[j]; yI9l*'
data[j] = temp; >taS<.G
} pBt/vSad
} \n850PS