[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; 6ipQx/IQ
} ~-'-<-
int i1=l; gSkY c{b
int i2=mid+1; wI?AZd;`'
for(int cur=l;cur<=r;cur++){ _+}f@&"
if(i1==mid+1) oo|Nu+
data[cur]=temp[i2++]; %$=2tfR
else if(i2>r) fni7HBV?
data[cur]=temp[i1++]; OV`li#H
else if(temp[i1] data[cur]=temp[i1++]; J:G{
else cyB2=,
data[cur]=temp[i2++]; BzTzIo5
} @>`qfy?
} fYlqaO4[
dg&GMo
} S2EV[K8#
o0TB>DX$`
改进后的归并排序: b{;LbHq+G
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package org.rut.util.algorithm.support; x M{SFF
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import org.rut.util.algorithm.SortUtil; K;]Dh?
9&{HD
/** PNH>LT^
* @author treeroot M6y|;lh''c
* @since 2006-2-2 'rrnTd c
* @version 1.0 VP*B<u
*/ ps33&
public class ImprovedMergeSort implements SortUtil.Sort { !\\OMAf7
@/xdWN!,
private static final int THRESHOLD = 10; ld#YXJ;P.k
{Rn*)D9
/* j9.%(*
* (non-Javadoc) iYGa4@/uM
* [XkWPx`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B?ipo,2~{
*/ Nzb=h/;
public void sort(int[] data) { umt(e:3f5
int[] temp=new int[data.length]; -/_hO$|W
mergeSort(data,temp,0,data.length-1); le6eorK8
} 0Z{u;FI
G> sqfYkK
private void mergeSort(int[] data, int[] temp, int l, int r) { mteQRgC
int i, j, k; {"O-/* f+(
int mid = (l + r) / 2; \mqrDaB
if (l == r) NRI[|
return; eh,_g.
if ((mid - l) >= THRESHOLD) ;rl61d}NH#
mergeSort(data, temp, l, mid); ~I]aUN
else O~Svk'.)
insertSort(data, l, mid - l + 1); ?gCP"~
if ((r - mid) > THRESHOLD) v)nBp\fjxp
mergeSort(data, temp, mid + 1, r); %&eBkN!T
else 6iY(RYZ7-
insertSort(data, mid + 1, r - mid); zUWeOR'X
SPnW8
for (i = l; i <= mid; i++) { 0> QqsQ
temp = data; 9{%/I
} Z>*a:|
for (j = 1; j <= r - mid; j++) { L%Ms?`i,
temp[r - j + 1] = data[j + mid]; sTvw@o*
} uEkGo5
int a = temp[l]; D8`SI21P
int b = temp[r]; Nj +^;Y
for (i = l, j = r, k = l; k <= r; k++) { DIgur}q)@
if (a < b) { W>u{JgY
data[k] = temp[i++]; sHQO*[[
a = temp; 9TEAM<b;
} else { J\Tu=f)
data[k] = temp[j--]; vnqLcNB H
b = temp[j]; 3bHB$n
} (W#^-*$R
} rpEN\S%7P
} ~SI G0U8
;8b!T -K
/** 3!8u
* @param data $5DlCN
* @param l M2nUY`%#v
* @param i 9&s>RJ
*/ J2k4k
private void insertSort(int[] data, int start, int len) { 28j/K=0(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vZPBjloT!.
} WsT
} W)L*zVj~
} pz"}o#R"x
} - x;xQ
2`Ihrz6
堆排序： k|$?b7)"@
bpa'`sf
package org.rut.util.algorithm.support; 6cOlY= bn
m14'u GC
import org.rut.util.algorithm.SortUtil; <VhD>4f{]
wWM[Hus
/** /$9We8
* @author treeroot W*2P+H%
* @since 2006-2-2 "YVr/u
* @version 1.0 Y4[oa?G
*/ k h6n(B\
public class HeapSort implements SortUtil.Sort{ f[?JLp
@0%[4
/* (non-Javadoc) *DQa6,b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /)sP<WPQ6
*/ F6_en z
public void sort(int[] data) { hRqr
MaxHeap h=new MaxHeap(); H`jnChD:M'
h.init(data); B/Ltb^a
for(int i=0;i h.remove(); s0DT1s&
System.arraycopy(h.queue,1,data,0,data.length); 'f8'|o)
} ;_0frX
$y%IM`/w
private static class MaxHeap{ GE=PaYz
"d2JNFIHb
void init(int[] data){ 1! 5VWF0
this.queue=new int[data.length+1]; #VsS C1
for(int i=0;i queue[++size]=data; tD,I7%|@
fixUp(size); @S 0mNA
} CtZOIx.;|
} \5j#ad
q``/7
private int size=0; -]G=Q1 1
X2{Aa T*M
private int[] queue; )[ejb?{d
8[#EC3
public int get() { U[z2{\
return queue[1]; V;hO1xfR3&
} Uy@:-NC)kn
z`,dEGfh^
public void remove() { j.c{%UYj
SortUtil.swap(queue,1,size--); x+v&3YF
fixDown(1); [kMWsiZ
} ^?|d< J:{
file://fixdown U|8?$/*\
private void fixDown(int k) { |o@U L
int j; #k,.xMJ~
while ((j = k << 1) <= size) { 0n\AUgVPF
if (j < size %26amp;%26amp; queue[j] j++; WP'.o
if (queue[k]>queue[j]) file://不用交换 "`h.8=-
break; COj^pdE3
SortUtil.swap(queue,j,k); >O0<u
k = j; ,[3}t%Da
} fP 3t0cp
} PJ,G_+b!
private void fixUp(int k) { (-VH=,Md
while (k > 1) { f`8?]@y{
int j = k >> 1; B;nIKZ
if (queue[j]>queue[k]) B7sBO6Z$J
break; -fN5-AC
SortUtil.swap(queue,j,k); 40[@d
k = j; (0Jr<16si$
} Pfd%[C/vdm
} fS p
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} g"`jWSt7Q
3N4kW[J2i
} [WXcp1p
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SortUtil： -h=wLYl@0i
'@5x=>
package org.rut.util.algorithm; 5?|y%YH;R\
%vUUx+
import org.rut.util.algorithm.support.BubbleSort; 8"rK
import org.rut.util.algorithm.support.HeapSort; EJNHZ<
import org.rut.util.algorithm.support.ImprovedMergeSort; V0n8fez b
import org.rut.util.algorithm.support.ImprovedQuickSort; #TcX5
import org.rut.util.algorithm.support.InsertSort; yZb})4.
import org.rut.util.algorithm.support.MergeSort; r]Lj@0F>8
import org.rut.util.algorithm.support.QuickSort; Oq(FV[N7t
import org.rut.util.algorithm.support.SelectionSort; cQ3p|a `
import org.rut.util.algorithm.support.ShellSort; B_C."{G
0^6}s1d_
/** <SdOb#2
* @author treeroot #c9MVQ_
* @since 2006-2-2 b#n
* @version 1.0 65tsJ"a<
*/ >fD%lq;
public class SortUtil { Ex6Kxd}8
public final static int INSERT = 1; R<^E?FI
public final static int BUBBLE = 2; 9fCU+s
public final static int SELECTION = 3; bNHsjx@
public final static int SHELL = 4; TQOJN
public final static int QUICK = 5; 2}_^~8
public final static int IMPROVED_QUICK = 6; HUbXJsSP
public final static int MERGE = 7; M7#CMLy
public final static int IMPROVED_MERGE = 8; 6=x]20
public final static int HEAP = 9; hMgk+4*
Fxn=+Xgg
public static void sort(int[] data) { gx2v(1?S
sort(data, IMPROVED_QUICK); D'Uc?2X,&
} SCjVzvG$yg
private static String[] name={ JB!*{{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xXJzE|)1h!
}; M>i *e
u3DFgl3-7
private static Sort[] impl=new Sort[]{ g@]1H41
new InsertSort(), d <zD@ z
new BubbleSort(), BWr!K5w>i
new SelectionSort(), B)dd6R>8
new ShellSort(), mS.!lkV
new QuickSort(), Ds@K%f(.?w
new ImprovedQuickSort(), B5_QH8kt7
new MergeSort(), ssmJ?sl
new ImprovedMergeSort(), `.wgRUhFH;
new HeapSort() 7w\!3pv
}; (~(FQ:L%U
swMR+F#u*
public static String toString(int algorithm){ S<5.}cR
return name[algorithm-1]; >n1UK5QD
} |=W>4>
[P]M)vJ**
public static void sort(int[] data, int algorithm) { Q[lkhx|.B
impl[algorithm-1].sort(data); &m{~4]qWpM
} 3Q,p,
McN'J.Sxp
public static interface Sort { Rli`]~!w
public void sort(int[] data); #t VGqf
} R^.c
z[JM ]Wy
public static void swap(int[] data, int i, int j) { }(WUZ^L
int temp = data; 5UQ[vHMqI
data = data[j]; OQDx82E
data[j] = temp; fLgHQ
} YT@N$kOg_
} ]ij:>O@{$